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[10-Q] Connect Biopharma Holdings Ltd Quarterly Earnings Report

Filing Impact
(Moderate)
Filing Sentiment
(Neutral)
Form Type
10-Q
Rhea-AI Filing Summary

Connect Biopharma (CNTB) reported Q3 2025 results with license and collaboration revenue of $16,000 and total operating expenses of $17.7 million, driven by research and development of $11.1 million and general and administrative of $6.6 million. The company posted a net loss of $17.2 million (basic and diluted loss per share $0.31). For the nine months, revenue was $64,000 and net loss was $40.4 million.

Cash, cash equivalents and short-term investments were $54.8 million as of September 30, 2025. Management believes these resources will fund anticipated needs for at least one year from the filing date. Total shareholders’ equity was $55.4 million.

In September, CNTB terminated its ADR program; ADRs were exchanged one-for-one into ordinary shares, which now trade on Nasdaq under “CNTB.” The company presented rademikibart data at ERS 2025 and is running Phase 2 studies in acute exacerbations of asthma and COPD, with topline data expected in the first half of 2026. As of October 31, 2025, 55,903,513 ordinary shares were outstanding.

Positive
  • None.
Negative
  • None.

Insights

Neutral update: higher R&D spend, stable cash runway.

CNTB reported Q3 license/collab revenue of $16,000 versus higher milestone-driven revenue last year, while operating expenses reached $17.7M, reflecting Phase 2 programs in acute asthma and COPD. Net loss was $17.2M, consistent with clinical-stage investment.

Liquidity stood at $54.8M in cash and investments as of Sep 30, 2025. Management states this supports operations for at least one year from filing, but future funding needs depend on trial progress and outcomes.

Operationally, the ADR termination consolidates trading into ordinary shares under “CNTB.” A near-term catalyst is topline Phase 2 data in the first half of 2026; actual impact will hinge on efficacy and safety results.

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TABLE OF CONTENTS
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549
_______________________
FORM 10-Q
_______________________
xQUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the quarterly period ended September 30, 2025
or
oTRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the transition period from _______ to ________
Commission File Number: 001-40212
_______________________
Connect Biopharma Holdings Limited
(Exact name of registrant as specified in its charter)
_______________________
Cayman IslandsNot Applicable
(State or other jurisdiction of incorporation or organization)(I.R.S. Employer Identification No.)
3580 Carmel Mountain Road, Suite 200
San Diego, California
92130
(Address of Principal Executive Offices)(Zip Code)
(Registrant’s Telephone Number, Including Area Code): (877) 245-2787
_______________________
Securities registered pursuant to Section 12(b) of the Act:
Title of Each
Class
Trading SymbolName of Each Exchange on Which
Registered
Ordinary Shares, par value $0.000174 per Share
CNTBThe Nasdaq Global Market
Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes x No o
Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes x No o
Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.
Large accelerated fileroAccelerated filero
Non-accelerated filerxSmaller reporting companyx

Emerging growth companyx
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o
Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).            Yes o     No x
As of October 31, 2025, there were 55,903,513 ordinary shares of the Company ($0.000174 par value) outstanding.


TABLE OF CONTENTS
CONNECT BIOPHARMA HOLDINGS LIMITED
FORM 10-Q FOR THE THREE AND NINE MONTHS ENDED SEPTEMBER 30, 2025

TABLE OF CONTENTS
PART I.
FINANCIAL INFORMATION
Page
ITEM 1.
Condensed Consolidated Financial Statements (unaudited)


Condensed Consolidated Balance Sheets as of September 30, 2025 and December 31, 2024 (unaudited)
4

Condensed Consolidated Statements of Operations and Comprehensive Loss for the Three and Nine Months Ended September 30, 2025 and 2024 (unaudited)
5

Condensed Consolidated Statements of Shareholders Equity for the Three and Nine Months Ended September 30, 2025 and 2024 (unaudited)
6

Condensed Consolidated Statements of Cash Flows for the Nine Months Ended September 30, 2025 and 2024 (unaudited)
8

Notes to Unaudited Condensed Consolidated Financial Statements
9
ITEM 2.
Management’s Discussion and Analysis of Financial Condition and Results of Operations
21
ITEM 3.
Quantitative and Qualitative Disclosures About Market Risk
26
ITEM 4.
Controls and Procedures
26
PART II.
OTHER INFORMATION

ITEM 1.
Legal Proceedings
26
ITEM 1A.
Risk Factors
26
ITEM 2.
Unregistered Sales of Equity Securities and Use of Proceeds
28
ITEM 3.
Defaults Upon Senior Securities
28
ITEM 4.
Mine Safety Disclosures
28
ITEM 5.
Other Information
28
ITEM 6.
Exhibits
29

SIGNATURES
30




TABLE OF CONTENTS
EXPLANATORY NOTE
Connect Biopharma Holdings Limited (the “Company”), an exempted company incorporated under the laws of the Cayman Islands, qualifies as a “foreign private issuer,” as defined in Rule 3b-4 under the Securities Exchange Act of 1934, as amended (the “Exchange Act”) in the United States (the “U.S.”). The Company has voluntarily elected to file annual reports on Form 10-K, quarterly reports on Form 10-Q and current reports on Form 8-K with the U.S. Securities and Exchange Commission instead of filing on the reporting forms available to foreign private issuers.
Although the Company has voluntarily elected to file annual, periodic and current reports on U.S. domestic issuer forms, the Company intends to maintain its status as a foreign private issuer. Accordingly, as a foreign private issuer, the Company remains exempt from the U.S. federal proxy rules pursuant to Section 14 of the Exchange Act and Regulations 14A and 14C thereunder, Regulation FD, and its officers, directors, and principal shareholders are not subject to the reporting and short-swing profit recovery provisions contained in Section 16 of the Exchange Act.
3

TABLE OF CONTENTS
PART I—FINANCIAL INFORMATION
Item 1. Condensed Consolidated Financial Statements
CONNECT BIOPHARMA HOLDINGS LIMITED
CONDENSED CONSOLIDATED BALANCE SHEETS
(Unaudited)
(in thousands, except par value)
September 30, 2025December 31, 2024
ASSETS
Current assets:
Cash and cash equivalents$37,845 $78,232 
Short-term investments16,936 15,476 
Accounts receivable, net17 789 
Prepaid expenses and other current assets7,799 2,464 
Total current assets62,597 96,961 
Property and equipment, net3,935 4,048 
Right-of-use lease assets, net737 189 
Intangible assets, net47 53 
Other assets45 33 
Total assets$67,361 $101,284 
LIABILITIES AND SHAREHOLDERS' EQUITY
Current liabilities:
Accounts payable$1,994 $342 
Accrued liabilities8,932 7,802 
Contract liabilities165 164 
Current lease liabilities336 154 
Total current liabilities11,427 8,462 
Non-current lease liabilities445 24 
Other non-current liabilities118 632 
Total liabilities11,990 9,118 
Commitments and contingencies (see Note 6)
Shareholders' equity:
Ordinary shares, $0.000174 par value; 400,000 shares authorized; 55,786 shares issued and outstanding at September 30, 2025 and 55,349 shares issued and outstanding at December 31, 2024
10 10 
Additional paid-in capital442,544 439,357 
Accumulated other comprehensive loss(1,277)(1,666)
Treasury shares(180)(180)
Accumulated deficit(385,726)(345,355)
Total shareholders' equity55,371 92,166 
Total liabilities and shareholders' equity$67,361 $101,284 
See accompanying notes.
4

TABLE OF CONTENTS
CONNECT BIOPHARMA HOLDINGS LIMITED
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND
COMPREHENSIVE LOSS
(Unaudited)
(in thousands, except per share amounts)
Three Months Ended September 30,Nine Months Ended September 30,
2025202420252024
License and collaboration revenue$16 $1,219 $64 $25,335 
Operating expenses:
Research and development expense11,110 9,009 26,516 23,020 
General and administrative expense6,583 6,056 16,096 15,148 
Total operating expenses17,693 15,065 42,612 38,168 
Loss from operations(17,677)(13,846)(42,548)(12,833)
Other income, net:
Interest income545 1,135 1,884 3,604 
Other income (expense)(7)(108)463 2,624 
Total other income, net538 1,027 2,347 6,228 
Net loss before income tax(17,139)(12,819)(40,201)(6,605)
Income tax expense61 57 170 117 
Net loss$(17,200)$(12,876)$(40,371)$(6,722)
Other comprehensive loss:
Foreign currency translation adjustments87 570 385 415 
Unrealized gains on available-for-sale investments11  4 11 
Comprehensive loss$(17,102)$(12,306)$(39,982)$(6,296)
Basic and diluted net loss per ordinary share$(0.31)$(0.23)$(0.73)$(0.12)
Weighted-average ordinary shares outstanding, basic and diluted55,716 55,254 55,523 55,181 







See accompanying notes.
5

TABLE OF CONTENTS
CONNECT BIOPHARMA HOLDINGS LIMITED
CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS’ EQUITY
(Unaudited)
(in thousands)
Ordinary SharesAdditional
Paid-In
Capital
Accumulated
Other
Comprehensive
Loss
TreasuryAccumulated
Deficit
Total
Shareholders'
Equity
SharesAmountShares
Balance, December 31, 202455,349$10 $439,357 $(1,666)$(180)$(345,355)$92,166 
Issuance of ordinary shares upon exercise of stock options3 — 2 — — — 2 
Share-based compensation expense— — 942 — — — 942 
Net loss— — — — — (10,272)(10,272)
Net unrealized losses on available-for-sale investments— — — (1)— — (1)
Foreign currency translation adjustments— — — 62 — — 62 
Balance, March 31, 202555,352 10 440,301 (1,605)(180)(355,627)82,899 
Issuance of ordinary shares under ESPP204 — 143 — — — 143 
Issuance of ordinary shares upon exercise of stock options24 — 18 — — — 18 
Share-based compensation expense— — 951 — — — 951 
Net loss— — — — — (12,899)(12,899)
Net unrealized losses on available-for-sale investments— — — (6)— — (6)
Foreign currency translation adjustments— — — 236 — — 236 
Balance, June 30, 202555,580$10 $441,413 $(1,375)$(180)$(368,526)$71,342 
Issuance of ordinary shares upon exercise of stock options206 — 215 — — — 215 
Share-based compensation expense— — 916 — — — 916 
Net loss— — — — — (17,200)(17,200)
Net unrealized gains on available-for-sale investments— — — 11 — — 11 
Foreign currency translation adjustments— — — 87 — — 87 
Balance, September 30, 202555,786 $10 $442,544 $(1,277)$(180)$(385,726)$55,371 







See accompanying notes.
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CONNECT BIOPHARMA HOLDINGS LIMITED
CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS’ EQUITY
(Unaudited)
(in thousands)
Ordinary SharesAdditional
Paid-In
Capital
Accumulated
Other
Comprehensive Loss
TreasuryAccumulated
Deficit
Total
Shareholders'
Equity
SharesAmountShares
Balance, December 31, 202355,103$10 $432,402 $(1,008)$(180)$(329,727)$101,497 
Share-based compensation expense— — 1,316 — — — 1,316 
Net loss— — — — — (8,693)(8,693)
Net unrealized gains on available-for-sale investments— — — 9 — — 9 
Foreign currency translation adjustments— — — (234)— — (234)
Balance, March 31, 202455,103 10 433,718 (1,233)(180)(338,420)93,895 
Issuance of ordinary shares under ESPP27 — 20 — — — 20 
Issuance of ordinary shares upon exercise of stock options124 — 101 — — — 101 
Share-based compensation expense— — 1,989 — — — 1,989 
Net income— — — — — 14,847 14,847 
Net unrealized gains on available-for-sale investments— — — 2 — — 2 
Foreign currency translation adjustments— — — 79 — — 79 
Balance, June 30, 202455,254$10 $435,828 $(1,152)$(180)$(323,573)$110,933 
Share-based compensation expense— — 2,022 — — — 2,022 
Net loss— — — — — (12,876)(12,876)
Foreign currency translation adjustments— — — 570 — — 570 
Balance, September 30, 202455,254 $10 $437,850 $(582)$(180)$(336,449)$100,649 




See accompanying notes.
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CONNECT BIOPHARMA HOLDINGS LIMITED
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
(Unaudited)
(in thousands)
Nine Months Ended September 30,
20252024
Operating activities:
Net loss$(40,371)$(6,722)
Adjustments to reconcile net loss to net cash used in operating activities:
Share-based compensation expense2,809 5,327 
Depreciation and amortization523 502 
Accretion of discounts on available-for-sale investments(706)(99)
Loss on disposal of property and equipment34 7 
Change in operating assets and liabilities:
Accounts receivable, net772(5,021)
Prepaid expenses and other assets(5,335)223 
Other non-current assets(6)(98)
Accounts payable1,652 (1,826)
Accrued liabilities1,130 (661)
Contract liabilities1 (13,152)
Operating lease liabilities55 (9)
Other non-current liabilities(514)236 
Net cash used in operating activities(39,956)(21,293)
Investing activities:
Purchases of short-term investments(30,470) 
Proceeds from maturities and sales of short-term investments29,720 12,750 
Purchases of property and equipment(418)(437)
Proceeds from sale of property and equipment2  
Net cash (used in) provided by investing activities(1,166)12,313 
Financing activities:
Proceeds from purchases under the ESPP143 20 
Proceeds from exercise of stock options235 101 
Net cash provided by financing activities378 121 
Effect of exchange rate changes on cash and cash equivalents357 388 
Net decrease in cash and cash equivalents(40,387)(8,471)
Cash and cash equivalents at beginning of year78,232 105,663 
Cash and cash equivalents at end of year$37,845 $97,192 
Supplemental disclosure of cash flow information:
Income taxes paid$124 $111 



See accompanying notes.
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CONNECT BIOPHARMA HOLDINGS LIMITED
NOTES TO UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
1. Organization and Business
Connect Biopharma Holdings Limited (“Connect,” “Connect Biopharma,” the “Company,” “we,” “us,” “our” and similar terms refer to Connect Biopharma Holdings Limited, together with its subsidiaries), headquartered in San Diego, California, is a clinical-stage biopharmaceutical company dedicated to transforming care for asthma and chronic obstructive pulmonary disease (“COPD”). The Company is advancing rademikibart, a next-generation, potentially best-in-class antibody designed to target anti-interleukin-4-receptor alpha (“IL-4Rα”).
Connect Biopharma was incorporated in November 2015 in the Cayman Islands as an exempted company with limited liability. The Company completed its Initial Public Offering (“IPO”) in March 2021, and its ordinary shares, par value $0.000174 per share (“Ordinary Shares”), are listed on the Nasdaq Global Market (“Nasdaq”) under the symbol “CNTB”.

As of September 30, 2025, we had cash, cash equivalents, and short-term investments of $54.8 million. Based on our current operating plan and projections, management believes that the Company’s cash, cash equivalents and short-term investments will be sufficient to meet the Company’s anticipated cash requirements for a period of at least one year from the date this Quarterly Report on Form 10-Q is filed with the U.S. Securities and Exchange Commission (the “SEC”).
2. Basis of Presentation and Significant Accounting Policies
Basis of Presentation
The Company continues to qualify as a Foreign Private Issuer under SEC rules; however, the Company has voluntarily elected to become a domestic filer, beginning with its Annual Report on Form 10-K for the year ended December 31, 2024, which was filed with the SEC on March 31, 2025 (the “2024 Annual Report”). The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the U.S. (“U.S. GAAP”) for interim financial information and the applicable rules and regulations of the SEC for interim reporting. Accordingly, since they are interim statements, they do not include all of the information and disclosures required by U.S. GAAP for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair statement have been included. Operating results for the three and nine months ended September 30, 2025 are not necessarily indicative of the results that may be expected for other quarters or the year ending December 31, 2025. The condensed consolidated balance sheet as of December 31, 2024 has been derived from the audited financial statements as of that date. These unaudited condensed consolidated financial statements and the notes thereto should be read in conjunction with the audited financial statements included in our 2024 Annual Report.
Principles of Consolidation
The accompanying condensed consolidated financial statements include the accounts of the Company and its direct and indirect subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation. The following are the Company’s subsidiaries:
Directly Held
Connect Biopharma HongKong Limited (“Connect HK”)
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Indirectly Held
Connect Biopharm LLC
Connect Biopharma Australia PTY LTD
Suzhou Connect Biopharma Co., Ltd. (“Connect SZ”)
Connect Biopharma (Beijing) Co., Ltd
Connect Biopharma (Shanghai) Co., Ltd.
Connect Biopharma (Shenzhen) Co., Ltd
Use of Estimates
The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported in the financial statements and disclosures made in the accompanying notes to the financial statements. Our significant accounting policies that involve significant judgment and estimates include revenue recognition, investments, accrued research and development expenses, income taxes and share-based compensation. Actual results could differ materially from those estimates.
Fair Value of Financial Instruments
A company may elect to use fair value to measure financial instruments. If the use of fair value is elected, any upfront costs and fees related to the item such as debt issuance costs must be recognized in earnings and cannot be deferred. The fair value election is irrevocable and generally made on an instrument-by-instrument basis, even if a company has similar instruments that it elects not to measure based on fair value. Unrealized gains and losses on existing items for which fair value has been elected are reported as a cumulative adjustment to beginning retained earnings and any changes in fair value are recognized in earnings. We have elected to not apply the fair value option to our financial assets and liabilities.
Cash and cash equivalents, receivables, prepaid expenses, other assets, accounts payable and accrued expenses, are carried at cost, which is considered to be representative of their respective fair values because of the short-term maturity of these instruments. Available-for-sale investment securities are carried at fair value.
Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. Valuation techniques used to measure fair value must maximize the use of observable inputs and minimize the use of unobservable inputs. The Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) Topic 820, Fair Value Measurements & Disclosures, establishes a fair value hierarchy which prioritizes the inputs used in measuring fair value as follows:
Level 1—Observable inputs such as quoted prices in active markets for identical assets or liabilities.
Level 2—Inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities.
Level 3—Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities.
Accounts Receivable, Net
Accounts receivable are recorded at the invoice amount, net of an allowance for credit losses. The allowance for credit losses reflects accounts receivable balances that are believed to be uncollectible. In estimating the allowance for credit losses, we consider: (1) our historical experience with collections and write-offs; (2) the credit quality of our customers and any recent or anticipated changes thereto; (3) the outstanding balances and past due amounts from our customers; and (4) reasonable and supportable forecast of economic conditions expected to exist throughout the contractual term of the receivable.
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As of September 30, 2025 and December 31, 2024, we determined that an allowance for credit losses was not required. For the three and nine months ended September 30, 2025 and 2024, we did not have any material write-offs of accounts receivable balances.
Share-Based Compensation Expense
On January 1, 2025, we began using the Black-Scholes option pricing model to estimate the fair value of each option grant on the grant date, in order to better align with our peers. Prior to 2025, we estimated the fair value of each option grant on the grant date using the Binomial option pricing model. This fair value is then amortized using the straight-line single-option method of attributing the value of share-based compensation to expense over the requisite service periods of the awards. Forfeitures are accounted for, as incurred, as a reversal of share-based compensation expense related to awards that will not vest. The fair value of each employee share purchase right is estimated on the grant date using the Black-Scholes option pricing model. The estimated fair value of each purchase right is then expensed on a straight-line basis over the requisite service period, which is generally the purchase period. The Black-Scholes option pricing model requires inputs of subjective assumptions, including each option’s expected life and price volatility of the underlying shares.
Net Loss per Share
Basic net loss per share is calculated by dividing the net loss by the weighted-average number of ordinary shares outstanding for the period. Diluted net loss per share is computed by dividing the net loss by the weighted-average number of ordinary shares and ordinary share equivalents outstanding for the period determined using the treasury share method. For purposes of this calculation, stock options and employee share purchase rights are considered to be ordinary share equivalents and are included in the calculation of diluted net loss per share only when their effect is dilutive.
Because we incurred a net loss for the three and nine months ended September 30, 2025 and 2024, the following ordinary share equivalents were not included in the computation of net loss per share because their effect would be anti-dilutive (in thousands):
September 30,
20252024
Stock options outstanding13,533 13,276 
Employee stock purchase plan rights695 20 
14,228 13,296 
Significant Accounting Policies
A complete description of our significant accounting policies are disclosed in the 2024 Annual Report.
Recent Accounting Pronouncements
Adopted
In December 2023, FASB issued Accounting Standards Update (“ASU”) No. 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures (“ASU 2023-09”), to enhance income tax reporting disclosures and require disclosure of specific categories in the tabular rate reconciliation. ASU 2023-09 is effective for fiscal years beginning after December 15, 2024. On January 1, 2025, we adopted the provisions of ASU 2023-09 on a prospective basis and the required disclosures will be included in our Annual Report on Form 10-K for the year ending December 31, 2025. The Company does not expect the adoption of ASU 2023-09 to have a material impact on its annual disclosures. ASU 2023-09 did not have an impact on our disclosures included in this Quarterly Report on Form 10-Q.
Not Yet Adopted
In November 2024, the FASB issued ASU 2024-03, Income Statement - Reporting Comprehensive Income - Expense Disaggregation Disclosures (Subtopic 220-40) (“ASU 2024-03”). ASU 2024-03 requires that public business entities disclose additional information about specific expense categories in the notes to financial statements at interim and annual reporting periods. The prescribed categories include purchases of inventory, employee compensation, depreciation, intangible asset amortization, and depletion. ASU 2024-03 may be applied either prospectively or retrospectively and is effective for annual periods beginning after December 15, 2026 and interim periods beginning after December 15, 2027, with early adoption permitted. We are currently evaluating the impact on our disclosures.
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In September 2025, the FASB issued ASU 2025-05, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses for Accounts Receivable and Contract Assets (“ASU 2025-05”). ASU 2025-05 provides all entities with a practical expedient when estimating expected credit losses for current accounts receivable and current contract assets arising from transactions accounted for under Topic 606. Under ASU 2025-05, an entity is required to disclose whether it has elected to use the practical expedient. An entity that makes the accounting policy election is required to disclose the date through which subsequent cash collection are evaluated. ASU 2025-05 must be applied prospectively and is effective for annual reporting periods beginning after December 15, 2025, and interim reporting periods within those annual reporting periods. Early adoption is permitted in both interim and annual reporting periods in which financial statements have not yet been issued or made available for issuance. We are currently evaluating the impact of ASU 2025-05 on our consolidated financial statements and related disclosures.
3. Fair Value Measurements
The Company measures cash, cash equivalents and short-term investments at fair value on a recurring basis. The fair values of such assets were as follows (in thousands):
Fair Value Measurements at Reporting Date Using
Balance at September 30, 2025Quoted Prices in
Active Markets for
Identical Assets
(Level 1)
Significant Other
Observable Inputs
(Level 2)
Significant
Unobservable Inputs
(Level 3)
Money market funds$16,191 $16,191 $ $ 
U.S. treasury bills7,978 7,978   
U.S. government agency obligations3,981  3,981  
U.S. corporate debt securities1,002  1,002  
U.S. commercial paper2,980  2,980  
Foreign commercial paper995  995  
Total$33,127 $24,169 $8,958 $ 
Fair Value Measurements at Reporting Date Using
Balance at December 31, 2024Quoted Prices in
Active Markets for
Identical Assets
(Level 1)
Significant Other
Observable Inputs
(Level 2)
Significant
Unobservable Inputs
(Level 3)
Money market funds$43,090 $43,090 $ $ 
U.S. treasury bills5,936 5,936   
U.S. government agency obligations8,325  8,325  
U.S. corporate debt securities1,387  1,387  
U.S. commercial paper1,831  1,831  
Foreign commercial paper980  980  
Total$61,549 $49,026 $12,523 $ 
We have not transferred any investment securities between the three levels of the fair value hierarchy.
As of September 30, 2025, short-term investments included $16.9 million of available-for-sale securities with contractual maturities of three months to one year. As of December 31, 2024, cash equivalents included $3.0 million of available-for-sale securities with contractual maturities of three months or less and short-term investments included $15.5 million of available-for-sale securities with contractual maturities of three months to one year. The money market funds as of September 30, 2025 and December 31, 2024 are included in cash and cash equivalents on the unaudited condensed consolidated balance sheets.
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The Company’s cash equivalents and short-term investment securities are classified within the fair value hierarchy as defined by authoritative guidance. The Company’s investment securities classified as Level 1 are valued using quoted market prices. The Company obtains the fair value of its Level 2 financial instruments from third-party pricing services. The pricing services utilize industry standard valuation models whereby all significant inputs, including benchmark yields, reported trades, broker/dealer quotes, issuer spreads, bids, offers, or other market-related data, are observable. The Company validates the prices provided by the third-party pricing services by reviewing their pricing methods and matrices and obtaining market values from other pricing sources. After completing the validation procedures, the Company did not adjust or override any fair value measurements provided by these pricing services as of September 30, 2025 or December 31, 2024. The Company does not have any investments classified as Level 3.
4. Balance Sheet Details
Available-for-Sale Investments
The following is a summary of our available-for-sale investments (in thousands):
September 30, 2025
Amortized CostGross Unrealized
Gains
Gross Unrealized
Losses
Estimated Fair
Value
U.S. treasury bills$7,975 $3 $ $7,978 
U.S. government agency obligations3,981   3,981 
U.S. corporate debt securities1,001 1  1,002 
U.S. commercial paper2,979 1  2,980 
Foreign commercial paper995   995 
Total$16,931 $5 $ $16,936 
December 31, 2024
Amortized CostGross Unrealized
Gains
Gross Unrealized
Losses
Estimated Fair
Value
U.S. treasury bills$5,934 $2 $ $5,936 
U.S. government agency obligations8,326  (1)8,325 
U.S. corporate debt securities1,387   1,387 
U.S. commercial paper1,831   1,831 
Foreign commercial paper980   980 
Total$18,458 $2 $(1)$18,459 
At each reporting date, the Company performs an evaluation of impairment to determine if any unrealized losses are the result of credit losses. Impairment is assessed at the individual security level. Factors considered in determining whether a loss resulted from a credit loss or other factors include the Company’s intent and ability to hold the investment until the recovery of its amortized cost basis, the extent to which the fair value is less than the amortized cost basis, the length of time and extent to which fair value has been less than the cost basis, the financial condition of the issuer, any historical failure of the issuer to make scheduled interest or principal payments, any changes to the rating of the security by a rating agency, any adverse legal or regulatory events affecting the issuer or issuer’s industry, and any significant deterioration in economic conditions.
The Company does not intend to sell the investment in unrealized loss position and it is unlikely that the Company will be required to sell the investment before the recovery of its amortized cost basis. Based on its evaluation, the Company determined its credit losses related to its available-for-sale securities were immaterial at September 30, 2025 and December 31, 2024.
The amortized cost of debt securities is adjusted for amortization of premiums and accretion of discounts to maturity. The Company regularly monitors and evaluates the realizable value of its available-for-sale investment securities. The Company did not recognize any impairment losses for the three and nine months ended September 30, 2025 or 2024.
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Unrealized gains and losses associated with the Company’s investments are reported in accumulated other comprehensive loss. For the three and nine months ended September 30, 2025, the Company recorded $11,000 and $4,000, respectively, in net unrealized losses associated with its available-for-sale investments. For the three months ended September 30, 2024, the Company did not record any unrealized gains or losses associated with available-for-sale investments. For the nine months ended September 30, 2024, the Company recorded $11,000 in net unrealized gains associated with its available-for-sale investments.
Realized gains and losses associated with its investments, if any, are reported in the statements of operations and comprehensive loss. The Company did not recognize any realized gains or losses during the three and nine months ended September 30, 2025 or 2024.
Prepaid Expenses and Other Current Assets
Prepaid expenses and other current assets consist of the following (in thousands):
September 30, 2025December 31, 2024
Prepaid clinical and manufacturing expenses$6,454 $1,541 
Prepaid insurance459 242 
Prepaid taxes212  
Interest receivables157 262 
Other prepaid expenses and current assets517 419 
Total prepaid expenses and other current assets$7,799 $2,464 
Accrued Liabilities
Accrued liabilities consist of the following (in thousands):
September 30, 2025December 31, 2024
Accrued clinical, manufacturing and professional expense$6,573 $4,211 
Accrued compensation and benefits2,102 3,342 
Other accrued expenses257 249 
Total accrued liabilities$8,932 $7,802 
5. License and Collaboration Agreement
Simcere License Agreement
On November 21, 2023 (the “Effective Date”), Connect HK and Connect SZ (“Licensor”) entered into an exclusive license and collaboration agreement (the “License Agreement”) with Simcere Pharmaceutical Co., Ltd. (“Simcere” or “Licensee”), a subsidiary of Simcere Pharmaceutical Group Ltd., to develop and commercialize rademikibart in Greater China.
Simcere has been granted exclusive rights to develop, manufacture, and commercialize rademikibart for all indications in Greater China, including mainland China, Hong Kong, Macau, and Taiwan (the “Territory”), while Connect retains rights in all other markets. Under the License Agreement, Connect was required to complete all of rademikibart’s ongoing clinical trials and related analysis in the Territory in atopic dermatitis (“AD”), while the Licensee will be responsible for rademikibart’s new drug application for AD in China and will also conduct and be responsible for the costs of all future clinical studies in all additional disease indications for rademikibart in Greater China.
As consideration for the rights granted to Simcere under the License Agreement, Simcere paid the Licensor a non-refundable, non-creditable up-front fee of approximately $21 million. Simcere is also required to make milestone payments to the Licensor upon the achievement of certain development, regulatory and commercial milestones (“Milestones”), initially totaling up to $123 million. In 2024, we received approximately $5 million in Milestone payments from Simcere for the achievement of certain development Milestones. In 2025, one time-based Milestone in the amount of approximately $8 million lapsed because it was not achieved by the deadline set forth in the License Agreement. Accordingly, as of September 30, 2025, we are eligible to receive remaining Milestone payments up to an aggregate amount of approximately $110 million. The achievement of these Milestones is dependent upon the timing and success of future development, regulatory and commercial activities to be completed by Simcere. Simcere is also required to make payments for cost
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reimbursements related to certain development activities, including supply of material for clinical development. The License Agreement additionally provides that Simcere is obligated to pay Licensor royalties at tiered percentage rates up to low double-digit percentages on net sales of the licensed product in the Territory.
The term of the License Agreement is coterminous with the period up to which sales-based royalty payments shall be made, which is approximately 12 years after commercialization of the licensed compound. After this period, the license is considered fully paid and Simcere can continue to exploit the rights in the license in the Territory.
Revenue Recognition
The Company evaluated the License Agreement which provides Simcere with the right to use the Company’s intellectual property in the Territory. The Company concluded that the License Agreement was subject to Topic 606 because the Company viewed the License Agreement as a contract with a customer as the activities were central to its business operations. As such, the Company assessed the terms of the License Agreement and identified four performance obligations for the license to research, develop, manufacture and commercialize rademikibart in the Territory. The four performance obligations identified include: (i) transfer of the intellectual property and know-how; (ii) transfer of the current manufacturing process; (iii) development and transfer of a new manufacturing process; and (iv) completion of certain rademikibart development services.
At inception of each arrangement that includes milestone payments, the Company evaluates where the milestones are considered probable of being reached. If it is probable that a significant revenue reversal would not occur, the associated milestone value is included in the transaction price. At the Effective Date, the Company determined the transaction price to be $25 million, which is comprised of (i) a $21 million upfront payment for the grant of license to the Licensee and (ii) $4 million of cost reimbursement upon delivery of certain clinical trial reports. All other milestones are considered to be constrained at the Effective Date because these milestones are not within the control of the Company and therefore these milestones are not included in the transaction price.
When an intellectual property license is determined to be a predominant promise in the arrangement, sales-based milestone payments and royalties are recognized at the later of when the associated performance obligation has been satisfied or when the sales occur. For cost reimbursements related to the supply of material for clinical development, the Company recognizes revenue when Simcere obtains control of the goods. For the three and nine months ended September 30, 2025, the Company recognized $16,000 and $64,000, respectively, in revenue under the License Agreement related to cost reimbursements for clinical materials. For the three and nine months ended September 30, 2024, the Company recognized $1.2 million and $25.3 million, respectively, in revenue under the License Agreement, which related to the upfront license fee, achievement of certain development milestones and cost reimbursements for clinical materials.
Allocation of the Transaction Price
The transaction price is generally allocated to the identified performance obligations based on the relative stand-alone selling price estimated for each distinct performance obligation. However the Company has allocated certain regulatory and development milestone payments only to certain specific performance obligation(s) where the terms of such payments relate specifically to the Company’s efforts to satisfy the respective performance obligation, and provided that such allocation is consistent with the objective that transaction price is allocated to each performance obligation in order to reflect the consideration to which the Company expects to be entitled to receive in exchange for satisfying those performance obligations. The Company allocated the $25.0 million transaction price based on relative stand-alone selling prices of each performance obligation as $23.8 million for the license, $0.1 million for the transfer of the current manufacturing process, $0.2 million for development and transfer of a new manufacturing process, and $0.9 million for completion of certain rademikibart development services. The Company developed the estimated stand-alone selling price for the license using a discounted cash flows model, which is an income approach. In estimating the stand-alone selling price for each performance obligation, the Company developed assumptions that require judgment and included forecasted revenues, expected development timelines, discount rates, probabilities of technical and regulatory success and costs for manufacturing clinical supplies.
The Company utilizes judgment to assess when control of the goods and services transfers to Simcere, to determine whether the performance obligation is satisfied over time or at a point in time and, if over time, the appropriate method of measuring progress for purposes of recognizing revenue. When recognizing revenue over time, the Company evaluates the measure of progress each reporting period and, if necessary, adjusts the progress of performance and related revenue recognition.
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The Company expects to recognize the transaction price, at a point in time or over the expected performance period of each respective performance obligation. The Company began recognizing revenue from the License Agreement once the Company had substantially completed the transfer of the intellectual property and know-how to Simcere. The revenue associated with the transfer of the intellectual property and know-how and transfer of the current manufacturing process were recognized at a point in time upon successful completion of each obligation during the second quarter of 2024. The Company will recognize the revenue associated with the transfer of a new manufacturing process at a point in time upon successful completion of the obligation. For the performance obligation to complete certain development services, the Company recognized the transaction price over the expected performance period using an input method. To measure the progress of this obligation, the Company used the cost-to-cost basis approach to estimate the percentage of completion as this method provides the most faithful depiction of the Company’s performance in transferring control of the services promised to Simcere and represents the Company’s best estimate of the period of the obligation. The performance obligation related to certain rademikibart development services was completed in third quarter of 2024.
Milestone Payments
The Licensor is entitled to development milestones under the License Agreement and certain regulatory milestone payments which are paid upon receipt of regulatory approvals within the Territory.
At the end of each reporting period, the Company will re-evaluate the probability of achievement of each milestone and any related constraint, and if necessary, adjust its estimate of the overall transaction price. Any such adjustments are recorded on a cumulative catch-up basis, which would affect the reported amount of license and collaboration revenues in the period of adjustment.
Royalties
As the license is deemed to be the predominant item to which sales-based royalties relate, the Company will recognize revenue when the related sales occur.
Contract Assets and Liabilities
As of September 30, 2025 and December 31, 2024, the Company had no contract assets related to the License Agreement. As of September 30, 2025 and December 31, 2024, the Company had contract liabilities related to the upfront fee received under the License Agreement of $0.2 million.
6. Commitments and Contingencies
Legal Proceedings
From time to time, the Company may be a party to litigation or subject to claims in the ordinary course of business. Regardless of the outcome, litigation can have an adverse impact on the Company because of defense and settlement costs, diversion of management resources and other factors. The Company was not a party to any material litigation and did not have contingency reserves established for any liabilities as of September 30, 2025 or December 31, 2024.
7. Leases
In February 2025, we relocated our corporate headquarters to a new location in San Diego, California. This operating lease for the new corporate headquarters is for 6,942 square feet of office space which expires on January 31, 2028. In the first quarter of 2025, we recognized an initial right-of-use (“ROU”) lease asset of $0.9 million and a lease liability of $0.9 million related to this space in San Diego, California.

We have an operating lease for 25,476 square feet of laboratory and office space in Taicang, China, with a lease term that expires on April 30, 2026. We also had an operating lease for 3,628 square feet of office space in San Diego, California, with a lease term that expired on April 30, 2025.
As of September 30, 2025 and December 31, 2024, the weighted average remaining lease term was 2.2 years and 1.0 year, respectively, and the weighted average discount rate used to determine the operating lease liability was 8.0% and 4.8%, respectively.
During the three and nine months ended September 30, 2025, we recognized $105,000 and $351,000, respectively, of operating lease expense and we paid $106,000 and $269,000, respectively, for our operating leases.
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During the three and nine months ended September 30, 2024, we recognized $69,000 and $213,000, respectively, of operating lease expense and we paid $76,000 and $225,000, respectively, for our operating leases.
Annual future minimum lease payments as of September 30, 2025 are as follows (in thousands):
2025 (remainder of year)$105 
2026371 
2027354 
202830 
Thereafter 
Total future minimum lease payments860 
Less: amount representing interest(79)
Total lease liabilities$781 
8. Reorganization
Executive Officer Departures
During the second and third quarters of 2024, we implemented changes to our executive leadership structure. In connection with these changes, we provided three executive officers with one-time severance payments upon termination, continued benefits for a specified period of time, and certain stock option modifications. The total expense for these activities was $3.2 million, $2.0 million of which was primarily for cash severance and $1.2 million of which was for non-cash, share-based compensation expense. During the three months ended September 30, 2024, we recognized $1.8 million of the total expense, $1.1 million of which was included in general and administrative expense, and $0.7 million of which was included in research and development expense. During the nine months ended September 30, 2024, we recognized $3.2 million of the total expense, $1.8 million of which was included in general and administrative expense, and $1.4 million of which was included in research and development expense. As of September 30, 2025, we have paid $2.0 million of cash severance charges. We have accounted for these expenses in accordance with the FASB ASC Topic 420, Exit or Disposal Cost Obligation.
9. Shareholders’ Equity
Statutory Reserves
In accordance with the People’s Republic of China (“PRC”) regulations and the articles of association of the companies registered in the PRC, companies are required to set aside 10% of their net profit for the year, offsetting any prior year losses, to the statutory surplus reserve fund as determined under the relevant PRC accounting standards. When the balance of such reserve reaches 50% of the entity’s registered capital, any further appropriation is optional. As of September 30, 2025, we have not made any profit appropriations to the reserve fund, as all of our subsidiaries in the PRC were in an accumulated loss position.
Under PRC laws and regulations, there are restrictions on the Company’s PRC subsidiaries with respect to transferring certain of their net assets to the Company either in the form of dividends, loans, or advances. As of September 30, 2025 and December 31, 2024, restricted net assets including paid-in capital and statutory reserve funds of the Company’s PRC subsidiaries was $27.3 million and $29.6 million, respectively.
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10. Equity Incentive Plans
Option Plan Activity
The following table summarizes the stock option activity for the nine months ended September 30, 2025:
Outstanding Options
Number of OptionsWeighted-Average
Exercise Price
Outstanding at December 31, 202414,263,242$2.93 
Granted1,377,500 $1.03 
Exercised(232,788)$1.01 
Cancelled(1,875,430)$7.86 
Outstanding at September 30, 202513,532,524$2.09 
Share-based Compensation
The following table summarizes share-based compensation expense related to share-based payment awards granted pursuant to all of our equity compensation arrangements (in thousands):
Three Months Ended September 30,Nine Months Ended September 30,
2025202420252024
Research and development$258 $872 $841 $2,433 
General and administrative658 1,150 1,968 2,894 
Total share-based compensation expense$916 $2,022 $2,809 $5,327 
As of September 30, 2025, there was $8.5 million of total unrecognized compensation cost related to non-vested, share-based payment awards granted under all of our equity compensation plans. Total unrecognized compensation cost will be adjusted for forfeitures. We expect to recognize this compensation cost over a weighted-average period of 2.8 years.
On January 1, 2025, we began using the Black-Scholes option pricing model to estimate the fair value of each option grant on the grant date, in order to better align with our peers. Prior to 2025, we estimated the fair value of each option grant on the grant date using the Binomial option pricing model. In connection with our change in method of estimating the fair value per share, we also began estimating the expected term of each option grant based on the simplified method described in SEC Staff Accounting Bulletin No. 107, Share-Based Payment. We believe the simplified method is appropriate, as all of our stock option grants would be considered “plain-vanilla” and we have a limited history of option exercise activity.

The following are the weighted-average assumptions for stock options:
For the Nine Months Ended September 30,
20252024
Risk-free interest rate4.0%4.3%
Dividend yield0.0%0.0%
Volatility105.9%103.8%
Expected life (years)610
Early exercise multiple (years)— 
2.2 - 2.8
The weighted-average fair value of options granted was $0.85 and $1.17 for the nine months ended September 30, 2025 and 2024, respectively.
We estimate the fair value of each purchase right granted under our Employee Stock Purchase Plan at the beginning of each new offering period using the Black-Scholes option pricing model. There was no new offering period during the three months ended September 30, 2025 or 2024.
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11. Income Taxes
For the three and nine months ended September 30, 2025, we recorded income tax expense of $61,000 and $170,000, respectively, compared to $57,000 and $117,000, respectively, for the same periods in 2024. Our effective tax rate for both the three and nine months ended September 30, 2025 was (0.4)%, compared to (0.4)% and (1.8)%, respectively, for the same periods in 2024. The effective tax rate in both periods was primarily driven by the full valuation allowance maintained against the Company’s deferred tax assets.
For the three and nine months ended September 30, 2025, the Company’s provision for income taxes was based on its worldwide estimated annualized effective tax rate, except for (1) jurisdictions for which a loss is expected for the year and no benefit can be realized for those losses, (2) jurisdictions for which forecasted pre-tax income or loss cannot be estimated, and (3) the tax effect of discrete items occurring during the period. The tax for jurisdictions for which a forecast cannot be estimated is based on actual taxes and tax reserves for the quarter.
Under the provisions of ASC 740, Income Taxes, the determination of the Company’s ability to recognize its deferred tax assets requires an assessment of both negative and positive evidence. The evidence evaluated by the Company included operating results during the most recent three-year period and future projections, with more weight given to historical results than expectations of future profitability, which are inherently uncertain. Certain entities’ net losses in recent periods represented sufficient negative evidence to require a valuation allowance against its net deferred tax assets. Due to the uncertainties surrounding our ability to generate future taxable income and consequently realize such deferred tax assets, a full valuation allowance has been established. This valuation allowance will be evaluated periodically and could be reversed partially or totally if business results sufficiently improve to support realization of deferred tax assets.
As of September 30, 2025, unrecognized tax benefits were $1.4 million, of which none would affect the effective tax rate, if recognized. It is the Company’s policy to classify accrued interest and penalties to unrecognized tax benefits in the provision for income taxes. There were no accrued interest or penalties as of September 30, 2025 or December 31, 2024. The disclosures regarding uncertain tax positions included in our 2024 Annual Report continue to be accurate for the three and nine months ended September 30, 2025.
On July 4, 2025, the One Big Beautiful Bill Act (the “OBBBA”) was signed into law, introducing significant U.S. tax changes. Key provisions of the OBBBA include changes to bonus depreciation, capitalized research and development expenditures and interest deductibility. The OBBBA did not have a material impact on the Company’s effective tax rate or consolidated financial statements for the three and nine months ended September 30, 2025.
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12. Segment Reporting
The Company operates in one operating segment: treatment of respiratory diseases. Operating segments are identified as components of an enterprise about which separate discrete financial information is available for evaluation by the Chief Operating Decision-Maker (the “CODM”), our Chief Executive Officer, in making decisions regarding resource allocation and assessing performance. The CODM utilizes the Company’s consolidated financial forecast, which includes product development roadmaps, as a key input to resource allocation. The CODM makes decisions on resource allocation, assesses performance of the business, and monitors budget versus actual results using our operating expenses, cash burn and cash runway.
The following table provides significant segment expenses, other segment items, reported segment net loss and a reconciliation of segment net loss to the Company’s total consolidated net loss for the three and nine months ended September 30, 2025 and 2024 (in thousands):
Three Months Ended September 30,Nine Months Ended September 30,
2025202420252024
License and collaboration revenue$16 $1,219 $64 $25,335 
Research and development expense(11,110)(9,009)(26,516)(23,020)
General and administrative expense(6,583)(6,056)(16,096)(15,148)
Other income, net538 1,027 2,347 6,228 
Income tax expense(61)(57)(170)(117)
Segment net loss(17,200)(12,876)(40,371)(6,722)
Reconciliation of loss:
Adjustments and reconciling items    
Consolidated net loss$(17,200)$(12,876)$(40,371)$(6,722)
The Company’s long-lived tangible assets, as well as the Company’s ROU lease assets recognized on the Condensed Consolidated Balance Sheets as of September 30, 2025 and December 31, 2024 were located as follows: $0.8 million and $0.1 million, respectively, in the U.S. and $3.9 million and $4.1 million, respectively, in the PRC.
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Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations.
The following discussion and analysis of our financial condition and results of operations should be read together with our condensed consolidated financial statements and related notes included in this Quarterly Report on Form 10-Q and the audited financial statements and related notes included in our 2024 Annual Report.
Forward-Looking Statements
The following discussion and other parts of this quarterly report contain forward-looking statements within the meaning of Section 21E of the Exchange Act. All statements other than statements of historical facts contained in this quarterly report, including statements regarding our strategy, future financial condition, future operations, research and development, potential of, and expectations for, our pipeline and technology platforms, the timing, potential of and expectations for planned clinical trials and preclinical studies, the timing and likelihood of regulatory filings and approvals for our product candidates, our ability to commercialize our product candidates, the potential benefits of collaborations, projected costs, prospects, plans, objectives of management, expected market size and growth for our potential products, the timing of availability of clinical data, program updates and data disclosures, and our plans for rademikibart, are forward-looking statements. These statements are often identified by the use of words such as “aim,” “anticipate,” “assume,” “believe,” “contemplate,” “continue,” “could,” “design,” “due,” “estimate,” “expect,” “goal,” “intend,” “may,” “might”, “objective,” “plan,” “positioned,” “potential,” “predict,” “seek,” “should,” “target,” “will,” “would” and other similar expressions that are predictions of or indicate future events and future trends, or the negative of these terms or other comparable terminology. The forward-looking statements in this quarterly report are only predictions. We have based these forward-looking statements largely on our current expectations and projections about future events and financial trends that we believe may affect our financial condition, operating results, business strategy, short-term and long-term business operations and objectives. These forward-looking statements speak only as of the date of this quarterly report and are subject to a number of risks, uncertainties and assumptions, including those described in Part II, Item 1A under the heading “Risk Factors.” The events and circumstances reflected in our forward-looking statements may not be achieved or occur and actual results could differ materially from those projected in the forward-looking statements. Except as required by applicable law, we do not plan to publicly update or revise any forward-looking statements contained herein, whether as a result of any new information, future events, changed circumstances or otherwise.
Overview
Connect Biopharma, headquartered in San Diego, California, is a clinical-stage biopharmaceutical company dedicated to transforming care for asthma and COPD. The Company is advancing rademikibart, a next-generation, potentially best-in-class antibody designed to target IL-4Rα.
Significant Developments
The following is a summary of significant developments affecting our business that occurred since the filing of our Quarterly Report on Form 10-Q for the three and six months ended June 30, 2025, filed with the SEC on August 13, 2025 (“Q2 2025 Form 10-Q”). For additional information or for a more comprehensive discussion of our product candidate, rademikibart, see our 2024 Annual Report, our Quarterly Report on Form 10-Q for the three months ended March 31, 2025, filed with the SEC on May 15, 2025 (“Q1 2025 Form 10-Q”), and Q2 2025 Form 10-Q.
In August 2025, we teamed with Ickey Woods and the Jovante Woods Foundation to raise awareness of acute asthma attacks.
On September 2, 2025, we terminated each of (i) the Deposit Agreement dated March 18, 2021, as amended, by and among the Company, Deutsche Bank Trust Company Americas and the holders and beneficial owners from time to time of American Depositary Shares, each representing an Ordinary Share, and evidenced by American Depositary Receipts (“ADRs”) issued thereunder and (ii) the related ADR program. At such time, our ADRs were cancelled and exchanged for Ordinary Shares at a one-for-one ratio. We subsequently listed our Ordinary Shares on Nasdaq under our existing symbol “CNTB”.

During the third quarter of 2025, we presented data supporting the development of rademikibart at the European Respiratory Society Congress 2025. Rapid and significant improvement in lung function and asthma control was observed across a broad range of type 2 inflammatory markers with the greatest improvements observed in those with elevated baseline levels of blood eosinophil counts of ≥300 cells/μL and fractional exhaled nitric oxide levels of >25 ppb. We believe this data supports our ongoing Phase 2 acute exacerbations studies in asthma and COPD. We expect to report topline data for our ongoing Phase 2 acute exacerbation studies in the first half of 2026.
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Critical Accounting Estimates
Our discussion and analysis of our financial condition and results of operations is based on our unaudited condensed consolidated financial statements, which have been prepared in accordance with U.S. GAAP. The preparation of these financial statements requires us to make estimates and judgments that affect the reported amounts of assets, liabilities, revenues and expenses, and related disclosures. We evaluate our estimates on an ongoing basis, including those related to revenue recognition, investments, accrued research and development expenses, income taxes and share-based compensation. We base our estimates on historical experience and on assumptions that we believe to be reasonable under the circumstances, the results of which form the basis of making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Actual results may differ materially from these estimates under different assumptions or conditions.
Our critical accounting estimates and judgments are described within Item 7 of our 2024 Annual Report.
Recent Accounting Pronouncements
See Note 2 to the condensed consolidated financial statements included in Item 1 of this Quarterly Report on Form 10-Q.
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Results of Operations
Comparison of the Three and Nine Months Ended September 30, 2025 and 2024
License and Collaboration Revenues
License and collaboration revenues relate to the Simcere License Agreement under which Simcere has been granted exclusive rights to develop, manufacture, and commercialize rademikibart for all indications in Greater China, including mainland China, Hong Kong, Macau, and Taiwan.
License and collaboration revenues for both the three and nine months ended September 30, 2025 were $16,000 and $64,000, respectively, for cost reimbursements for clinical materials. License and collaboration revenues for the three and nine months ended September 30, 2024 were $1.2 million and $25.3 million, respectively, for the upfront license fee, achievement of certain development milestones and cost reimbursements.
Research and Development Expense
Research and development expense consisted of the following (in thousands):
Three Months Ended September 30,Nine Months Ended September 30,
2025202420252024
Rademikibart-related costs$8,068 $5,168 $17,476 $12,264 
Other development related costs435 84 879 
Personnel costs and other expenses2,781 2,534 8,114 7,444 
Share-based compensation expense258 872 842 2,433 
Total research and development expense$11,110 $9,009 $26,516 $23,020 
For the three and nine months ended September 30, 2025, research and development expense was $11.1 million and $26.5 million, respectively, compared to $9.0 million and $23.0 million, respectively, for the same periods in 2024. The increase in research and development expense was primarily due to an increase in costs related to the development of rademikibart. During the second quarter of 2025, we initiated two rademikibart Phase 2 clinical trials in patients experiencing an acute exacerbation of asthma or COPD. This increase was partially offset by a decrease in non-cash, share-based compensation expenses.
General and Administrative Expense
For the three and nine months ended September 30, 2025, general and administrative expense was $6.6 million and $16.1 million, respectively, compared to $6.1 million and $15.1 million, respectively, for the same periods in 2024. The increase in general and administrative expense was primarily due to an increase in professional fees to support our efforts to become more U.S.-centric. This increase was partially offset by a decrease in non-cash, share-based compensation expense.
Other Income, Net
For the three and nine months ended September 30, 2025, other income, net was $0.5 million and $2.3 million, respectively, compared to $1.0 million and $6.2 million, respectively, for the same periods in 2024. The decrease in other income, net was primarily due to a decrease in government subsidies and interest income earned on our invested cash balances.
Reorganization
See Note 8 to the Condensed Consolidated Financial Statements included in Item I of this Quarterly Report on Form 10-Q for discussion of the Company’s executive officer reorganization plan.
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Liquidity and Capital Resources
As of September 30, 2025, we had cash, cash equivalents and short-term investments of $54.8 million. Based on our current operating plan and projections, management believes that the Company’s existing cash, cash equivalents and short-term investments will be sufficient to meet the Company’s anticipated cash requirements for a period of at least one year from the date this Quarterly Report on Form 10-Q is filed with the SEC.
Our net loss for the three and nine months ended September 30, 2025 was $17.2 million, or $0.31 per share, and $40.4 million, or $0.73 per share, respectively, compared to $12.9 million, or $0.23 per share, and $6.7 million, or $0.12 per share, respectively, for the same periods in 2024.
Our net cash used in operating activities for the nine months ended September 30, 2025 was $40.0 million, compared to $21.3 million for the same period in 2024. The increase in net cash used in operating activities was primarily due to an increase in net loss of $33.6 million, partially offset by net changes in our operating assets and liabilities of $18.1 million.
Our net cash used in investing activities for the nine months ended September 30, 2025 was $1.2 million, compared to net cash provided by investing activities of $12.3 million for the same period in 2024. The decrease in cash provided by investing activities was primarily due to net purchases of short-term investments of $0.8 million for the nine months ended September 30, 2025, compared to net maturities of $12.8 million for the nine months ended September 30, 2024.
Our net cash provided by financing activities for the nine months ended September 30, 2025 was $0.4 million, compared to $0.1 million for the same period in 2024. The increase in net cash provided by financing activities was mainly due to an increase in net proceeds from stock option exercises and purchases under the ESPP.
Historically, we have financed our operations, including technology and product research and development, primarily through sales of our securities, including our IPO that we completed in March 2021 for total cash consideration of $219.9 million before underwriting discounts and commissions, and, through up-front payments, research funding and milestone payments under collaborative arrangements.
Material Cash Requirements
In February 2025, we relocated our corporate headquarters to a new location in San Diego, California. This operating lease for the new corporate headquarters is for 6,942 square feet of office space and expires on January 31, 2028. We have agreed to pay a basic annual rent for the additional office space that increases incrementally over the term of the lease from $0.3 million for the first 12 months of the lease (inclusive of certain rent abatements) to $0.4 million for the last 12 months of the lease, and such other amounts as set forth in the lease.
In addition, we had a lease for 25,476 square feet of laboratory and office space in Taicang, China, with a lease term that expires on April 30, 2026. As of September 30, 2025, we had total operating lease obligations of $0.9 million, with $0.1 million due during the remainder of fiscal year 2025 and $0.8 million due within the following two to three years.
At September 30, 2025, our short-term purchase obligations mainly consisted of non-cancellable commitments under agreements with third-party manufacturers in the ordinary course of business. We plan to fund these commitments with our current financial resources.
We enter into agreements with clinical sites and clinical research organizations for the conduct of our clinical trials and contract manufacturing organizations for the manufacture and supply of preclinical, clinical and, eventually, commercial materials and drug product. We make payments to these clinical sites and clinical research organizations based in part on the number of eligible patients enrolled and the length of their participation in the clinical trials. Under certain of these agreements, we may be subject to penalties in the event that we prematurely terminate these agreements. At this time, due to the variability associated with clinical site agreements, contract research organization agreements and contract manufacturing agreements, we are unable to estimate with certainty the future costs we will incur. We intend to use our current financial resources to fund our obligations under these commitments.
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We have based our estimates on assumptions that may prove to be wrong, and we may use our available capital resources sooner than we currently expect. Because of the numerous risks and uncertainties associated with the development of product candidates and programs, and because the extent to which we may enter into collaborations with third parties for development of our product candidates is unknown, we are unable to estimate the timing and amounts of increased capital outlays and operating expenses associated with completing the research and development of our product candidates. Our future capital requirements will depend on many factors, including:
our ability to raise capital in light of the impacts of the current unfavorable global economic and political conditions;
the scope, progress, results, and costs of drug discovery, preclinical development, laboratory testing, and clinical trials for the product candidates we may develop;
the costs associated with our manufacturing process development and evaluation of third-party manufacturers and suppliers;
the costs, timing and outcome of regulatory review of our product candidates;
the costs of preparing and submitting marketing approvals for any of our product candidates that successfully complete clinical trials, and the costs of maintaining marketing authorization and related regulatory compliance for any products for which we obtain marketing approval;
the costs of preparing, filing, and prosecuting patent applications, maintaining and enforcing our intellectual property and proprietary rights, and defending intellectual property-related claims;
the costs of future activities, including product sales, medical affairs, marketing, manufacturing, and distribution, for any product candidates for which we receive marketing approval;
the terms of our current and any future license agreements and collaborations;
the extent to which we acquire or in-license other product candidates, technologies and intellectual property;
the success of our ongoing or future collaborations;
our ability to establish and maintain additional collaborations on favorable terms, if at all; and
the costs of operating as a public company.
Until such time, if ever, that we can generate product revenue sufficient to achieve profitability, we expect to finance our cash needs through a combination of equity offerings, debt financings, collaborations, monetization transactions, government contracts or other strategic transactions. To the extent that we raise additional capital through the sale of equity, ownership interests of existing holders of our ordinary shares will be diluted, and the terms of these securities may include liquidation or other preferences that adversely affect the rights of holders of our ordinary shares. If we raise additional funds through collaboration agreements, strategic alliances, licensing arrangements, monetization transactions, or marketing and distribution arrangements, we may have to relinquish valuable rights to our technologies, future revenue streams, research programs or product candidates or grant licenses on terms that may not be favorable to us or grant rights to develop and market products or product candidates that we would otherwise prefer to develop and market ourselves. Future debt financing, if available, may involve covenants restricting our operations or our ability to incur additional debt. Any debt or equity financing that we raise may contain terms that are not favorable to us or our shareholders.
There have been significant disruptions to global financial markets that have contributed to a general global economic slowdown. The resulting high inflation rates may materially affect our business and corresponding financial position and cash flows. Inflationary factors, such as increases in the cost of our clinical trial materials and supplies, interest rates and overhead costs may adversely affect our operating results. High interest rates also present a recent challenge impacting the U.S. economy and could make it more difficult for us to obtain traditional financing on acceptable terms, if at all, in the future. Additionally, the general consensus among economists suggests that we should expect a higher recession risk to continue over the next year, which, together with the foregoing, could result in further economic uncertainty and volatility in the capital markets in the near term, and could negatively affect our operations. Furthermore, such economic conditions have produced downward pressure on share prices. Although we do not believe that inflation has had a material impact on our financial position or results of operations to date, we may experience increases in the near future (especially if inflation rates remain high or begin to rise again) on our operating costs, including our labor costs and
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research and development costs, due to supply chain constraints, consequences associated with geopolitical conflicts such as the ongoing wars involving Ukraine and Israel, the impact of tariffs imposed by or on the U.S. or other matters impacting global trade, shifting priorities and policies within the U.S. federal government, worsening global macroeconomic conditions, and employee availability and wage increases, which may result in additional stress on our working capital resources. If we are unable to raise capital when needed or on attractive terms, we would be forced to delay, reduce, or eliminate our research and development programs or future commercialization efforts.
Item 3. Quantitative and Qualitative Disclosures About Market Risk.
Not required for smaller reporting companies.
Item 4. Controls and Procedures.
We maintain disclosure controls and procedures that are designed to ensure that information required to be disclosed in our periodic and current reports that we file with the SEC is recorded, processed, summarized, and reported within the time periods specified in the SEC’s rules and forms, and that such information is accumulated and communicated to our management, including our principal executive officer and principal financial officer, as appropriate, to allow timely decisions regarding required disclosure. In designing and evaluating the disclosure controls and procedures, management recognized that any controls and procedures, no matter how well designed and operated, can provide only reasonable and not absolute assurance of achieving the desired control objectives. In reaching a reasonable level of assurance, management necessarily was required to apply its judgment in evaluating the cost-benefit relationship of possible controls and procedures. In addition, the design of any system of controls is based in part upon certain assumptions about the likelihood of future events, and there can be no assurance that any design will succeed in achieving its stated goals under all potential future conditions; over time, controls may become inadequate because of changes in conditions, or the degree of compliance with policies or procedures may deteriorate. Because of the inherent limitations in a cost-effective control system, misstatements due to error or fraud may occur and not be detected.
As of September 30, 2025, we carried out an evaluation, under the supervision and with the participation of our management, including our principal executive officer and principal financial officer, of the effectiveness of the design and operation of our disclosure controls and procedures, as defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended. Based on this evaluation, our principal executive and financial officers concluded that our disclosure controls and procedures were effective at the reasonable assurance level as of September 30, 2025.
An evaluation was also performed under the supervision and with the participation of our management, including our principal executive officer and principal financial officer, of any change in our internal control over financial reporting that occurred during our last fiscal quarter and that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting. That evaluation did not identify any changes in our internal control over financial reporting that occurred during our latest fiscal quarter that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.
PART II—OTHER INFORMATION
Item 1. Legal Proceedings.
From time to time, we may become involved in legal proceedings arising in the ordinary course of our business. We are not currently party to any material legal proceedings, and we are not aware of any pending or threatened legal proceeding against us that we believe could have an adverse effect on our business, operating results or financial condition.
Item 1A. Risk Factors.
We operate in a rapidly changing environment that involves a number of risks that could materially affect our business, financial condition or future results, some of which are beyond our control. In addition to the other information set forth in this report, the risks and uncertainties that we believe are most important for you to consider are discussed in Part I, “Item 1A. Risk Factors” in our 2024 Annual Report and Part II, “Item 1A. Risk Factors” in our Q1 2025 Form 10-Q. Other than the risk factor set forth below, we are not aware of any material changes to the risk factors described in our 2024 Annual Report and Q1 2025 Form 10-Q.
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The increasing use of artificial intelligence (“AI”) and machine learning in drug discovery and development introduces new and evolving risks that could harm our business and competitive position.
AI is increasingly playing a role in our industry, being used for target identification, drug discovery, preclinical modeling, clinical operations, and data analysis, among other things. While it is not a significant factor in our current operations, AI may play a future role in our operations based upon our evaluation of its usefulness to us. As with many new and emerging technologies, AI presents numerous risks and challenges that could adversely affect our business.
AI technologies are inherently complex and evolving. They may not function as intended, produce accurate results, or provide actionable insights. The quality of AI outputs depends heavily on the quality and quantity of input data, which in the life sciences context may be limited, biased, incomplete, or subject to regulatory and privacy constraints. If we utilize AI in the future and our AI systems fail to achieve their intended purposes – such as identifying viable therapeutic candidates or targets, predicting biological outcomes, producing reproducible results, optimizing clinical trial designs or operations, and other similar or related purposes – our product development efforts may be delayed or unsuccessful. If we are unable to successfully integrate and manage AI within our business, or if AI fails to deliver the expected benefits, our ability to develop rademikibart or any other new therapies could be materially adversely affected.
The industry in which we compete is characterized by rapid technological advancements, frequent introductions of new products and heavy competition. The development of rademikibart and any other future product candidates is vital to our success. The implementation of AI technologies and processes by us or by any third-party collaborators, including advanced predictive analytics, computational approaches and so-called “generative” AI, has the potential to provide significant benefits in these areas. Use of AI in our efforts may be difficult to deploy successfully due to operational issues inherent in such methods. In particular, AI algorithms utilize machine learning and predictive analytics which may lead to flawed, biased, or inaccurate results, or exposure to competitive and reputational harm.
Even with the successful implementation of AI, we may fail to correctly identify indications and allocate resources efficiently, which could adversely impact our pipeline and ability to compete effectively. Developing, testing and deploying resource-intensive AI systems may also require additional investment and increase our costs, and there is no guarantee that our investment in such systems would lead to more effective or efficient development of rademikibart or other investigational products, or lead to eventual regulatory approval or commercialization of any new products.
We also face increased competition from other companies that are using AI and related methods for drug discovery and development, some of which have more resources than we do and may have developed more effective methods than we and any third-party collaborators have, which may reduce our and any third-party collaborators’ effectiveness in identifying potential targets and attracting additional collaborators to work with us. If our competitors are able to utilize new technologies more effectively (including but not limited to those that may involve AI or be created using AI) to discover, develop and commercialize products that compete with any of our product candidates or potential commercial products, such technologies could adversely impact our ability to compete.
Further, AI presents additional risks and challenges, especially as the use of these technologies becomes more important to our operations over time. Generative AI may be used improperly or inappropriately which could lead to the tainting of our proprietary information and render us unable to qualify for certain patent or trade secret protection. Its use by people, including our vendors, employees, suppliers and contractors, with access to our proprietary and confidential information, including trade secrets, may continue to increase and may lead to the release of such information, which may impact our ability to realize the benefit of our intellectual property. The increasing use of AI and machine learning in drug discovery and development introduces new and evolving risks related to ownership, inventorship, and protection of intellectual property generated by or with the assistance of AI technologies. Regulatory and legal frameworks governing AI-generated inventions are still developing and may create uncertainty regarding our ability to secure and enforce rights in such inventions. Our use of generative AI platforms may lead to novel and urgent cybersecurity and privacy risks, which may adversely affect our operations and reputation, as well as the operations of any third-party collaborators. Emerging ethical issues surround the use of AI, and we may be subject to reputational and legal risk if our deployment or use of AI becomes controversial. Regulators could limit our, or any third-party collaborator’s ability to develop or implement AI-based technologies as part of measures taken against us or any third-party collaborators in particular or as a consequence of broader legislation, which could have an adverse effect on our or any third-party collaborator’s business, results of operations and financial conditions. Several jurisdictions around the globe, including Europe and the U.S., have proposed, enacted, or are considering laws governing the development and use of AI/Machine Learning, such as the EU’s AI Act and the Colorado Artificial Intelligence Act. For example, the EU AI Act, which entered into force on August 1, 2024 and most provisions of which will become effective on August 2, 2026, sets out a risk-based framework, subjecting certain AI technologies to numerous compliance obligations, including transparency, conformity and risk assessment, monitoring and human oversight requirements. Under the EU AI Act, non-compliant companies may be subject to administrative fines of
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up to 35 million Euros or 7% of a company’s total worldwide annual turnover for the preceding financial year, whichever is the higher. Certain of our activities could subject us to the EU AI Act and depending on how the EU AI Act is implemented and interpreted, we may have to adapt our business practices, contractual arrangements, and services to comply with such obligations. Likewise, in the U.S., several states, including Colorado and California, passed laws to regulate various AI uses, including AI used to make consequential decisions. In addition, various federal regulators have issued guidance and focused enforcement efforts on the use of AI in regulated sectors. The FDA, for example, issued guidance on the use of AI in medical devices, requiring detailed risk management and review processes to obtain approvals. If we develop or use AI systems governed by these laws or regulations, we would need to meet higher standards of data quality, transparency, monitoring and human oversight, and we would need to adhere to specific and potentially burdensome and costly ethical, accountability, and administrative requirements, with the potential for significant enforcement or litigation in the event of any perceived non-compliance. We expect other jurisdictions will adopt similar laws. Uncertainty in the legal regulatory regime may require significant resources to modify and maintain business practices to comply with U.S. and non-U.S. laws, the nature of which cannot be determined at this time.

Item 2. Unregistered Sales of Equity Securities and Use of Proceeds.
Not applicable.
Item 3. Defaults Upon Senior Securities.
Not applicable.
Item 4. Mine Safety Disclosures.
Not applicable.
Item 5. Other Information.
Not applicable.
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Item 6. Exhibits.
Incorporation by Reference
Exhibit No.DescriptionFormFile No.Exhibit ReferenceFiling DateFiled or Furnished Herewith
31.1
Certification of Principal Executive Officer pursuant to Rules 13a-14(a) and 15d-14(a) under the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
Filed
31.2
Certification of Principal Financial Officer Pursuant to Rules 13a-14(a) and 15d-14(a) under the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
Filed
32.1#
Certifications of Principal Executive Officer and Principal Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
Furnished
101.INSInline XBRL Instance Document – the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL documentFiled
101.SCHInline XBRL Taxonomy Extension Schema DocumentFiled
101.CALInline XBRL Taxonomy Extension Calculation Linkbase DocumentFiled
101.DEFInline XBRL Taxonomy Definition Linkbase DocumentFiled
101.LABInline XBRL Taxonomy Extension Label Linkbase DocumentFiled
101.PREInline XBRL Taxonomy Extension Presentation Linkbase DocumentFiled
104Cover Page Interactive Data File (embedded within the Inline XBRL document and contained in Exhibit 101)Filed
# The certifications attached as Exhibit 32.1 that accompany this Quarterly Report on Form 10-Q are not deemed filed with the Securities and Exchange Commission and are not to be incorporated by reference into any filing of the Company under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended, whether made before or after the date of this Quarterly Report on Form 10-Q, irrespective of any general incorporation language contained in such filing.
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SIGNATURES
Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.
Connect Biopharma Holdings Limited
Date: November 12, 2025
/s/ Barry D. Quart
Barry D. Quart, Pharm.D.
Chief Executive Officer
(Registrant’s Principal Executive Officer)
/s/ Lisa Peraza
Lisa Peraza
Senior Vice President of Finance
(Registrant’s Principal Financial and Accounting Officer)
30

FAQ

What was CNTB’s revenue in Q3 2025?

License and collaboration revenue was $16,000 in Q3 2025, primarily from cost reimbursements related to the Simcere agreement.

What net loss did CNTB report for Q3 2025?

CNTB reported a net loss of $17.2 million, with basic and diluted net loss per share of $0.31.

How much cash and investments did CNTB have as of September 30, 2025?

Cash, cash equivalents and short-term investments totaled $54.8 million as of September 30, 2025.

What is CNTB’s stated cash runway?

Management believes existing cash and investments will meet anticipated needs for at least one year from the date of filing.

What change did CNTB make to its share listing in September 2025?

CNTB terminated its ADR program; ADRs were exchanged one-for-one into ordinary shares trading on Nasdaq under “CNTB.”

When are the next clinical milestones for rademikibart?

Topline data from Phase 2 acute exacerbation studies in asthma and COPD are expected in the first half of 2026.

How many CNTB shares were outstanding?

As of October 31, 2025, there were 55,903,513 ordinary shares outstanding.
Connect Biopharma Holdings Ltd

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