Welcome to our dedicated page for Quantum-Si Incorporated SEC filings (Ticker: QSI), a comprehensive resource for investors and traders seeking official regulatory documents including 10-K annual reports, 10-Q quarterly earnings, 8-K material events, and insider trading forms.
This page compiles U.S. SEC filings for Quantum-Si Incorporated (Nasdaq: QSI), a proteomics technology and life sciences company focused on single-molecule protein analysis and Next-Generation Protein Sequencing. Here, investors can review how Quantum-Si reports its financial performance, capital structure, and material corporate events in official regulatory documents.
Quantum-Si’s periodic reports, such as its quarterly results furnished via Form 8-K, provide detail on product and service revenue, cost of revenue, research and development spending, selling, general and administrative expenses, and items like lease termination or legal settlement expenses. These filings also include condensed consolidated balance sheets and statements of operations, along with non-GAAP metrics such as adjusted total operating expenses and adjusted EBITDA, together with reconciliations to GAAP measures.
Capital markets and financing activities are documented in Forms 8-K and related registration statements. Examples include a registered direct offering of Class A common stock and pre-funded warrants, an at-the-market Sales Agreement for Class A common stock, and the termination of a prior equity distribution agreement. Filings describe intended uses of proceeds, such as funding the Proteus platform development, commercialization, manufacturing development, research and development, and general corporate purposes.
Other material agreements and corporate actions, including lease terminations, settlement and mutual release agreements, and inducement equity awards under the 2023 Inducement Equity Incentive Plan, are also reported in Quantum-Si’s SEC filings. Stock Titan’s interface adds AI-powered summaries that highlight key terms, financial impacts, and timelines from these documents, helping readers quickly understand complex agreements, capital raises, and operating decisions without reading every line of each filing.
Quantum-Si Incorporated (QSI) filed a Form 8-K to furnish materials from its Investor & Analyst Day held on November 19, 2025. The company used this event to present slides and a webcast replay that provide updates and summaries of its business, which are available in the Investors section of its website and attached as Exhibit 99.1. The company states that the information in this report, including Exhibit 99.1, is being furnished rather than filed under the Exchange Act and is not deemed incorporated into other securities filings unless specifically referenced.
Quantum-Si (QSI) reported Q3 2025 results with total revenue of $552 thousand, gross profit of $194 thousand, and a net loss of $35.7 million ($0.17 per share). Operating expenses included a $13.6 million lease termination expense and $1.8 million legal settlement expense (net of insurance), which weighed on results.
The company ended the quarter with $230.5 million in cash, cash equivalents and marketable securities. During 2025 it completed two registered direct offerings—$50.0 million gross each in January and July—resulting in net proceeds recorded of approximately $46.8 million and $46.7 million, respectively; July included pre-funded warrants exercised in full. A new $100.0 million at-the-market program with Leerink was established on September 26, 2025, with no sales during the quarter.
Other items: interest and dividend income was $2.6 million, and a $1.5 million gain from changes in warrant liabilities partially offset the operating loss. Class A shares outstanding were 195,520,747 as of September 30, 2025; Class B shares were 19,937,500. Management believes current liquidity will fund planned operations for at least twelve months.
Quantum-Si Incorporated furnished an Item 2.02 report announcing it issued a press release with results for the three and nine months ended September 30, 2025, along with a business update. The materials are furnished, not filed, under the Exchange Act.
Exhibits include 99.1 (press release dated November 5, 2025), 99.2 (use of non-GAAP financial measures), and 104 (cover page Inline XBRL).
Quantum‑Si (QSI) launched an at‑the‑market offering to sell up to $100,000,000 of Class A common stock under a Sales Agreement with Leerink Partners, which may act as sales agent on a best‑efforts basis or as principal. Sales may be made from time to time at market prices as defined in Rule 415(a)(4).
Leerink Partners will receive a commission of up to 3.0% of gross proceeds, and there is no escrow arrangement. The shares trade on Nasdaq as “QSI”; the last reported sale price was $2.18 on October 28, 2025.
Management intends to use any net proceeds for product development (including the Proteus platform), commercialization, manufacturing development, research and development, and other general corporate purposes such as working capital and capital expenditures. The company notes potential dilution to purchasers given variable sale prices and existing equity overhang. As context, shares outstanding were 164,357,534 as of June 30, 2025.
Quantum-Si (QSI) director and 10% owner Jonathan M. Rothberg reported the sale of 26,095 shares of Class A common stock on 10/16/2025 (transaction code S). The sale was executed pursuant to a Rule 10b5-1 trading plan established on September 13, 2024 and described as part of estate planning.
The filing states a weighted average price of $3.07 per share, with shares sold between $3.07 and $3.09. Following the transaction, beneficial ownership includes 2,568,443 Class A shares held directly and additional indirect holdings through various entities, including 1,904,866 Class A by NVR TR, LLC. Indirect holdings also include Class B common stock of 17,943,750 shares by 4C Holdings I, LLC and 1,993,750 shares by 4C Holdings V, LLC. The filing notes prior estate-planning distributions among affiliated trusts and that Dr. Rothberg disclaims beneficial ownership of shares held by his spouse and by 23rd Century Capital LLC.
Quantum-Si Incorporated filed an amended Form S-3 shelf registration that establishes a base prospectus to offer up to
The company reports 164,357,534 shares of Class A outstanding and 19,937,500 Class B shares (all held by Chairman Jonathan M. Rothberg, Ph.D.) giving Class B holders 20 votes per share. Material dilution sources disclosed include reserved shares for equity plans, outstanding options and RSUs, and 3,833,319 Public Warrants plus 135,000 Private Warrants. The prospectus reiterates standard risk factors, forward-looking statement caution and sources for incorporated SEC filings.
Quantum-Si Incorporated disclosed in an 8-K that it has furnished a Sales Agreement dated September 26, 2025 between the company and Leerink Partners LLC, which is included as Exhibit 1.1 by reference to a Form S-3 filed the same day. The filing identifies the company’s Class A common stock (QSI) and redeemable warrants (QSIAW) listed on Nasdaq and confirms corporate identifying details.
The submission provides the existence and date of the Sales Agreement but includes no substantive commercial or financial terms, share amounts, placement mechanics, or expected proceeds within the 8-K text itself.
Quantum-Si Incorporated has filed a shelf registration on Form S-3 to offer up to $300,000,000 of various securities, which includes a sales agreement to sell up to $100,000,000 of Class A common stock under an at-the-market arrangement with Leerink Partners. The prospectus describes the terms and mechanics for multiple security types including Class A and Class B common stock, preferred stock, debt securities, warrants, rights and units, and includes detailed conversion, voting and redemption provisions. As of June 30, 2025, the company reported 164,357,534 shares of Class A common stock outstanding and 19,937,500 shares of Class B common stock outstanding, all held by the Chairman and affiliates, with Class B shares carrying 20 votes per share. The filing discloses reserved shares for equity plans and outstanding warrants, option pools and a weighted average option exercise price of $2.51. The prospectus incorporates prior SEC reports by reference and highlights risk factors, use-of-proceeds discretion by management, and potential dilution from future issuances.
Quantum-Si Incorporated entered into a Settlement and Mutual Release Agreement with Winchester Office LLC on September 23, 2025 to terminate a lease for premises at 115 Munson Street in New Haven, Connecticut. The lease, originally expected to run through July 31, 2032, will now end effective September 23, 2025, when the company surrenders the premises and its rent obligations cease.
As consideration for the early termination and settlement of all disputes, Quantum-Si agreed to pay a Termination Fee equal to an aggregate of $11,000,000.00, less a $272,618.16 credit for September 1, 2025 monthly recurring charges and the surrender of a security deposit of $573,214.50. The arrangement is described as a material definitive agreement and also as a direct financial obligation for the company.
Christian LaPointe, Ph.D., General Counsel and Corporate Secretary of Quantum-Si Inc. (QSI), reported routine share dispositions related to tax withholding on vested restricted stock units.
On 09/22/2025 and 09/23/2025 LaPointe sold 5,364 shares on each date under a mandatory sell-to-cover provision, for total reported sales of 10,728 shares. The weighted average sales prices were $1.6826 (shares sold $1.64–$1.72) and $1.635 (shares sold $1.57–$1.79). Following the transactions, beneficial ownership is reported as 966,170 shares after the first sale and 960,806 shares after the second sale. The sales were reported on a Form 4 signed by an attorney-in-fact on 09/24/2025.
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