Curis enacts 1-for-20 reverse stock split

Curis, Inc. implemented a 1-for-20 reverse stock split of its common stock, effective as of 5:00 p.m. Eastern Time on July 2, 2026.

Accepted by SEC EDGAR 07/02/2026 - 08:56 AM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

Curis, Inc. implemented a 1-for-20 reverse stock split of its common stock, effective as of 5:00 p.m. Eastern Time on July 2, 2026. Every 20 issued and outstanding shares of common stock are being converted into one share, with fractional shares rounded up to the nearest whole share.

The reverse split does not change the $0.01 par value or the number of authorized common shares. All outstanding warrants, restricted stock units, stock options and the share reserves under equity incentive plans will be proportionally adjusted. Trading on a split-adjusted basis will begin July 6, 2026, and the stock will continue under the ticker “CRIS” with a new CUSIP 231269408.

Insights

Corporate actions analyst

Curis consolidates shares 1-for-20 without changing total economic ownership.

Curis is effecting a 1-for-20 reverse stock split, converting each block of 20 common shares into one share. Fractional positions are rounded up to a full share, and the par value and authorized share count remain unchanged.

The filing states that all outstanding warrants, restricted stock units, stock options, and shares available under equity incentive plans will be adjusted to reflect the new share count, preserving existing economic terms. Trading will move to a split-adjusted basis on July 6, 2026 under the same ticker, with only the CUSIP number changing.

8-K Event Classification

3 items: 3.03, 5.03, 9.01

3 items

Item 3.03 Material Modification to Rights of Security Holders Securities

A change was made that materially affects the rights of existing shareholders (e.g., dividend rights, voting rights).

Item 5.03 Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year Governance

The company amended its charter documents, bylaws, or changed its fiscal year.

Item 9.01 Financial Statements and Exhibits Exhibits

Financial statements, pro forma financial information, or exhibit attachments filed with this report.

Key Figures

Reverse split ratio: 1-for-20 Effective time of reverse split: 5:00 p.m. Eastern Time Split-adjusted trading start date: July 6, 2026 +2 more

5 metrics

Reverse split ratio 1-for-20 Every 20 issued and outstanding shares convert into one share

Effective time of reverse split 5:00 p.m. Eastern Time Effective as of July 2, 2026

Split-adjusted trading start date July 6, 2026 Trading on a reverse stock split-adjusted basis begins

Par value per share $0.01 per share Par value of Curis common stock remains unchanged

New CUSIP number 231269408 CUSIP for Curis common stock after reverse split

Key Terms

reverse stock split, Certificate of Amendment, equity incentive plans, fractional share

4 terms

reverse stock split financial

"which will effect, as of 5:00 p.m. Eastern Time on July 2, 2026... a 1-for-20 reverse stock split"

A reverse stock split reduces a company's number of outstanding shares while raising the price per share proportionally, so the total value of each investor's holding is unchanged; a 1-for-10 split turns 100 shares worth $1 each into 10 shares worth $10 each. Companies often do this to regain compliance with an exchange's minimum price rule or to attract investors who avoid very low-priced stocks.

Certificate of Amendment regulatory

"filed a certificate of amendment to the Company’s Restated Certificate of Incorporation"

A certificate of amendment is an official filing that updates a company’s founding documents—its legal “rulebook” that sets share structure, voting rules, name and basic purpose. Think of it like changing the blueprint of a building: small changes are paperwork, big ones can alter who owns how much and who controls decisions. Investors watch these filings because they can affect share counts, voting power, dilution and company value.

equity incentive plans financial

"the number of shares that remain available for future issuance under the Company’s equity incentive plans"

Equity incentive plans are company programs that pay employees, executives, or directors with company stock, stock options, or share units instead of or in addition to cash, aiming to align their interests with shareholders—like giving team members a stake in the house they help build. For investors this matters because such plans can motivate better company performance but also dilute existing ownership and increase reported compensation costs, so they affect future earnings, voting power, and share value.

fractional share financial

"stockholders who would otherwise be entitled to receive a fractional share of Common Stock"

A fractional share is a portion of a single stock that is worth less than one full share, like owning a slice of a pizza instead of the whole pie. It lets investors buy and hold part of expensive stocks or spread small amounts of money across many companies, which helps with diversification and regular investing; dividends and price changes affect fractional shares proportionally, though some rights and trading rules can vary by provider.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What reverse stock split did Curis (CRIS) approve and when is it effective?

Curis approved a 1-for-20 reverse stock split of its common stock, effective as of 5:00 p.m. Eastern Time on July 2, 2026. Each 20 issued and outstanding shares will be converted into one share from that time.

How will fractional shares be handled in the Curis (CRIS) reverse stock split?

Curis will not issue fractional shares in the reverse stock split. Instead, any stockholder entitled to a fractional share after the 1-for-20 conversion will have that fraction rounded up to the nearest whole share of common stock.

Does the Curis (CRIS) reverse stock split change par value or authorized shares?

The reverse stock split does not change Curis’s $0.01 par value per share or the total number of authorized common shares. Only the number of issued and outstanding shares is affected by the 1-for-20 consolidation described in the filing.

When will Curis (CRIS) begin trading on a reverse split-adjusted basis and under what ticker?

Curis common stock will begin trading on a reverse stock split-adjusted basis at the opening of trading on July 6, 2026. The shares will continue to trade on the Nasdaq Capital Market under the existing ticker symbol “CRIS.”

What happens to Curis (CRIS) options, RSUs and equity plan shares after the reverse split?

All outstanding Curis warrants, restricted stock units, and stock options will be adjusted for the 1-for-20 reverse split, including their exercise prices. The number of shares remaining available for future issuance under equity incentive plans will also be adjusted, as provided in those plan and award terms.

What is the new CUSIP number for Curis (CRIS) common stock after the split?

Following the 1-for-20 reverse stock split, Curis common stock will have a new CUSIP number, 231269408. The shares will continue to trade on the Nasdaq Capital Market under the ticker “CRIS,” with only the CUSIP identifier changing for settlement and custody purposes.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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000110820512-31false00011082052026-07-022026-07-02

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549 

_____________________

FORM 8-K

_____________________

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event Reported): July 2, 2026

Curis, Inc.

(Exact Name of Registrant as Specified in Charter)

Delaware			000-30347			04-3505116
(State or Other Jurisdiction of Incorporation)			(Commission File Number)			(I.R.S. Employer Identification Number)

128 Spring Street, Building C - Suite 500, Lexington MA 02421

(Address of Principal Executive Offices) (Zip Code)

(617) 503-6500

(Registrant's telephone number, including area code)

Not Applicable

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:
			☐			Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
			☐			Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
			☐			Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
			☐			Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:        

Title of each class

Trading Symbol

Name of each exchange on which registered

Common Stock, Par Value $0.01 per share

CRIS

Nasdaq Capital Market

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

    Emerging growth company  ☐

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. ☐

Item 3.03. Material Modification to Rights of Security Holders.

To the extent required by Item 3.03 of Form 8-K, the information contained in Item 5.03 below is incorporated herein by reference.

Item 5.03. Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year.

On July 2, 2026, Curis, Inc. (the “Company”) filed a certificate of amendment to the Company’s Restated Certificate of Incorporation, as amended, with the Secretary of State of the State of Delaware (“Certificate of Amendment”), which will effect, as of 5:00 p.m. Eastern Time on July 2, 2026 (“Effective Time”) a 1-for-20 reverse stock split (the “Reverse Stock Split”) of the Company’s issued and outstanding common stock, $0.01 par value per share (“Common Stock”).

As a result of the Reverse Stock Split, every 20 shares of the Company’s issued and outstanding Common Stock will be converted into one share of Common Stock. No fractional shares will be issued, and stockholders who would otherwise be entitled to receive a fractional share of Common Stock as a result of the Reverse Stock Split will have such fractional share of Common Stock rounded up to the nearest whole share.

The Reverse Stock Split will not change the par value of the Common Stock or the number of authorized shares of Common Stock. All outstanding warrants, restricted stock units and stock options will be adjusted as a result of the Reverse Stock Split, as well as the corresponding exercise price, as applicable, as well as the number of shares that remain available for future issuance under the Company’s equity incentive plans, as provided by the terms of such warrants, restricted stock units, stock options and incentive plans and described in the Company’s proxy statement for the Company’s Special Meeting as filed with the Securities and Exchange Commission on June 5, 2026.

Trading of the Company’s common stock on a Reverse Stock Split-adjusted basis will begin at the opening of trading on July 6, 2026. The Common Stock will continue to trade under the existing ticker symbol “CRIS.” The new CUSIP number for the Common Stock following the Reverse Stock Split is 231269408.

The foregoing description of the Certificate of Amendment does not purport to be complete and is qualified in its entirety by reference to the full text of the Certificate of Amendment, a copy of which is filed as Exhibit 3.1 to this Current Report on Form 8-K and is incorporated herein by reference.

Item 9.01. Financial Statements and Exhibits.

(d)Exhibits

Exhibit Number						Description
3.1						Certificate of Amendment to the Restated Certificate of Incorporation, as amended
104						Cover Page Interactive Data File (embedded within the InLine XBRL document)

SIGNATURE

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 hereunto duly authorized.

						Curis, Inc.
Date:			July 2, 2026			By:			/s/ Diantha Duvall
									Diantha Duvall
									Chief Financial Officer

Filing Exhibits & Attachments

4 documents

Other Documents

• EX-3.1 EX-3.1 10.8 KB
• EX-101 XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT 1.7 KB
• EX-101 XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT 22.9 KB
• EX-101 XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT 13.3 KB