Every 8-K that Quantum-Si Incorporated (QSI) has filed with the SEC in the last 24 months is listed below, newest first, and each one links through to the document itself with the summary and the scores our analysis gives it.
A 8-K covers material events a company has to report between its quarterly reports, so if you follow QSI and want that one kind of document rather than the whole filing history, this is the page to keep. The company's other filings, of every form, are on the full QSI filings page.
Quantum-Si Incorporated reported second-quarter 2026 revenue of $344 thousand, down from $591 thousand a year earlier, as it transitions from its Platinum platform to the anticipated Proteus platform. Six-month 2026 revenue was $602 thousand versus $1.4 million in the prior-year period.
Gross profit for the quarter was $172 thousand with a 50% gross margin. Total operating expenses declined to $25.8 million from $30.5 million, and net loss improved to $23.5 million from $28.8 million. Adjusted EBITDA for the quarter was negative $21.2 million. The company ended June 30, 2026 with $169.9 million in cash, cash equivalents and marketable securities and expects this to fund operations into the fourth quarter of 2028.
Quantum-Si updated its anticipated commercial launch of Proteus to Q2 2027 to allow an additional integrated instrument design cycle, and announced a 20% workforce reduction expected to generate about $12 million in annualized operating expense savings. Management reiterated 2026 guidance of approximately $1.0 million in revenue, adjusted total operating expenses of $98.0 million or less, and total cash usage of $93.0 million or less, and highlighted an estimated $4 billion annual non-human proteomics market opportunity.
Quantum-Si Incorporated reported receiving a Nasdaq Listing Qualifications notice on July 23, 2026 stating that its Class A common stock no longer meets the $1.00 per share minimum bid price requirement under Nasdaq Listing Rule 5450(a)(1), after trading below that level for 30 consecutive business days.
The notice has no immediate effect on trading; the stock continues on The Nasdaq Global Market under “QSI” and business operations and SEC reporting continue unchanged. Under Nasdaq Listing Rule 5810(c)(3)(A), the company has 180 calendar days, until January 19, 2027, to achieve a closing bid of at least $1.00 for a minimum of 10 consecutive business days, subject to possible extension. If compliance is not regained, Quantum-Si may seek a transfer to The Nasdaq Capital Market and could use a reverse stock split to cure the deficiency; failure to regain compliance could lead to delisting, with only uncertain relief available through a Nasdaq Hearings Panel appeal. The company plans to monitor its share price and evaluate available options.
Quantum-Si, Incorporated entered a new long-term lease for approximately 54,374 square feet of planned office, laboratory and manufacturing space in San Diego, California. The 10-year term is expected to begin around September 1, 2027, with a latest possible start of November 1, 2027.
Initial monthly base rent is about $315,369.20, or $5.80 per square foot, increasing roughly 3% each year. Base rent is fully abated for the first 20 months after commencement. The landlord will provide up to $17,127,810 as a tenant improvement allowance, while Quantum-Si pays prepaid rent of $434,448.26 and posts a $2,085,786.64 letter-of-credit security deposit. The lease supports ongoing development of the Proteus™ platform and expanded manufacturing capabilities and replaces existing San Diego space expected to expire on December 31, 2027.
-SI Incorporated reported voting results from its Annual Meeting held on May 15, 2026. Shareholders representing approximately 84.59% of the total voting power of Class A and Class B shares formed a quorum.
All nominated directors were reelected, with Jonathan M. Rothberg, Ph.D. receiving 454,010,014 votes for and 429,631 against. Shareholders also ratified PricewaterhouseCoopers LLP as independent registered public accounting firm, with 502,452,749 votes for, and approved the advisory vote on executive compensation with 441,315,119 votes for.
Quantum-Si Incorporated reported first quarter 2026 results and updated its 2026 outlook. Revenue for the quarter was $258,000, generating gross profit of $74,000 and a gross margin of 29%. Net loss was $21.7 million, while adjusted EBITDA was negative $20.1 million.
Adjusted total operating expenses were $21.4 million, down from $22.9 million a year earlier as the company managed selling, general and administrative costs while increasing research and development for its Proteus platform. Cash, cash equivalents and marketable securities totaled $190.4 million as of March 31, 2026, which the company anticipates will fund operations into the second quarter of 2028.
For full-year 2026, Quantum-Si reiterated guidance of approximately $1.0 million in revenue, adjusted total operating expenses of $98.0 million or less, and total cash usage of $93.0 million or less, reflecting a transition year focused on preparing the Proteus single-molecule protein sequencing system for an anticipated commercial launch at the end of 2026.
Quantum-Si Incorporated reported wider full-year losses while preparing for its next-generation Proteus platform launch. For 2025, revenue was $2.4 million, with gross profit of $1.2 million and a gross margin of 47%. The company posted a 2025 net loss of $101.3 million, similar to the prior year, but reduced adjusted operating expenses to $86.3 million from $99.0 million.
In the fourth quarter of 2025, revenue was $0.5 million with a 27% gross margin and a net loss of $17.6 million. Management highlighted significant cost discipline and one-time litigation charges of $18.7 million during 2025. As of December 31, 2025, cash, cash equivalents and marketable securities totaled $215.8 million, which the company believes funds operations into the second quarter of 2028.
For 2026, Quantum-Si issued guidance for revenue of approximately $1.0 million, adjusted total operating expenses of $98.0 million or less, and total cash usage of $93.0 million or less. The company expects 2026 to be a transition year, intentionally moderating revenue as it embeds upgrade credits and placement programs to support a stronger commercial launch of the Proteus system, which has a list price of $425,000 and is targeted for launch by the end of 2026.
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 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 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 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.
Quantum-Si Incorporated posted an updated corporate presentation to its investor website on August 8, 2025. The company says it distributes slides and presentations from time to time to provide updates and summaries of its business, and the updated presentation slides are available in the "Investors" section at https://ir.quantum-si.com. The presentation is furnished as Exhibit 99.1 to this Current Report on Form 8-K.
The filing explicitly states the information, including Exhibit 99.1, is being furnished and shall not be deemed "filed" for purposes of Section 18 of the Exchange Act, nor incorporated by reference into registration statements except by specific reference. The report also lists Exhibit 104 (cover page interactive data file) and is signed by Chief Financial Officer Jeffry Keyes.