Stocks Industrials QSI
NASDAQ · IndustrialsQuantum-Si Inc (QSI)
Quantum-Si Inc brought in $1.3M of revenue over the twelve months to September 30, 2026, down 60.2% from a year earlier. It posted a net loss of $85.1M. In fiscal 2025 capital spending exceeded operating cash flow by $97.2M. At September 30, 2026 it held $25.6M in cash. Its latest periodic report to the SEC is the quarterly report (10-Q) filed on November 5, 2026.
Key facts about Quantum-Si Inc
- Net worth
- Quantum-Si Inc has a market value (market cap) of $299.9M at the latest share price, and shareholders' equity of $160.2M on its balance sheet at September 30, 2026. A company's "net worth" usually means one of these: what the market pays for all its shares, or its assets minus its liabilities.
- Revenue and profit
- In fiscal 2025 revenue was $2.4M (-20.3% year on year), with a net loss of $101.3M. Over the 12 months to September 30, 2026: revenue $1.3M, net loss $85.1M.
- Cash flow
- In fiscal 2025 operations used $94.7M of cash.
- Latest report
- The latest periodic report (quarterly report, 10-Q) was filed with the SEC on November 5, 2026 and covers the period to September 30, 2026. Open on SEC EDGAR
- Next earnings report
- Quantum-Si Inc's next report is expected around March 2, 2027. That is an estimate from its filing rhythm, not a date the company has announced.
What Quantum-Si Inc does
Quantum-Si Inc is registered with the SEC under industry code SIC 3829 (Measuring & Controlling Devices, NEC). Its shares trade on NASDAQ under the ticker QSI.
Revenue and profit by year
Key figures
| Fiscal year | Revenue | Net income | Diluted EPS | Free cash flow |
|---|---|---|---|---|
| 2025 | $2.4M | -$101.3M | -$0.51 | -$97.2M |
| 2024 | $3.1M | -$101M | -$0.71 | -$92.4M |
| 2023 | $1.1M | -$96M | -$0.68 | -$98.5M |
| 2022 | $0 | -$132.4M | -$0.95 | -$101.3M |
| 2021 | $0 | -$95M | -$1.19 | -$72.6M |
| 2020 | n/a | -$36.6M | -$6.84 | -$33M |
Earnings: every quarter and the next report date
Full financial statements: income, balance sheet and cash flow
Where QSI ranks in Industrials
Latest SEC filings
What Quantum-Si Inc has filed recently, newest first. Each links to the original document on SEC EDGAR.
- November 5, 2026Quarterly report 10-Q · period to September 30, 2026Revenue fell 62% to $212K versus the same quarter last year; diluted EPS -$0.10 versus -$0.17.
- November 5, 2026
- October 15, 2026Other event 8-K
- October 8, 2026
- September 29, 2026
- August 28, 2026Activist stake changed SCHEDULE 13D/A
- August 13, 2026Quarterly report 10-Q · period to June 30, 2026Revenue fell 42% to $344K versus the same quarter last year; diluted EPS -$0.11 versus -$0.16.
- August 13, 2026
- July 29, 2026Passive stake changed SCHEDULE 13G/A
- July 24, 2026
Insider trades
What the people running Quantum-Si Inc did with its shares, from the Form 4 filings they must send the SEC within two business days.
Insiders sold $39.4K worth of shares in the last 90 days and bought none on the open market.
| Date | Insider | What | Shares | Value |
|---|---|---|---|---|
| September 22, 2026 | LaPointe ChristianGC & Corp. Secretary | Sold | 4,721 | $3.6K |
| September 22, 2026 | Keyes Jeffry R.Chief Financial Officer | Sold | 2,493 | $1.9K |
| September 22, 2026 | Hawkins Jeffrey AlanPresident & CEO, Director | Sold | 9,709 | $7.4K |
| September 21, 2026 | LaPointe ChristianGC & Corp. Secretary | Sold | 9,795 | $7.4K |
| September 21, 2026 | Keyes Jeffry R.Chief Financial Officer | Sold | 5,172 | $3.9K |
| September 21, 2026 | Hawkins Jeffrey AlanPresident & CEO, Director | Sold | 20,143 | $15.2K |
| June 23, 2026 | Hawkins Jeffrey AlanPresident & CEO, Director | Sold | 11,311 | $10.2K |
| June 23, 2026 | Vieceli John S.Chief Product Officer | Sold | 15,112 | $13.6K |
Who owns QSI
Three views from three kinds of SEC filings, each with its own date. They overlap and are not added up.
5% holders
| Holder | Of class | Filed |
|---|---|---|
| Rothberg Jonathan M.13D, may seek influence with 4 related filers | 100% | August 28, 2026 |
| 4C Holdings I, LLC13D, may seek influence with 4 related filers | 90% | September 17, 2024 |
Largest institutional holders
Positions that investment managers reported on Form 13F for the quarter ended June 30, 2026, largest first, with the change on the quarter ended March 31, 2026. Managers file 13F up to 45 days after a quarter ends. 141 managers reported a position.
| Holder | Shares | Change on quarter |
|---|---|---|
| Vanguard Capital Management LLC | 7,578,208 | +556,301 |
| ARK Investment Management LLC | 7,167,738 | +288,839 |
| BlackRock, Inc. | 5,225,352 | -8,189,597 |
| Amova Asset Management Americas, Inc. | 3,885,230 | -506,436 |
| Sumitomo Mitsui Trust Group, Inc. | 3,885,230 | -506,436 |
| Millennium Management LLC | 3,131,726 | new |
| UBS Group AG | 2,561,897 | +859,370 |
| Aqr Capital Management LLC | 2,348,665 | -43,514 |
| Geode Capital Management, LLC | 2,236,526 | -1,598,595 |
| Jane Street Group, LLC | 2,142,735 | new |
| Susquehanna International Group, Llp | 1,116,750 | -347,818 |
| Vanguard Fiduciary Trust Co | 1,116,683 | -569 |
| State Street Corp | 890,741 | -2,879,948 |
| Fosun International Ltd | 743,935 | 0 |
| Renaissance Technologies LLC | 553,871 | +435,971 |
| Vanguard Portfolio Management LLC | 497,098 | -1,023,548 |
| Goldman Sachs Group Inc | 476,288 | +32,111 |
| Northern Trust Corp | 450,531 | -810,170 |
| Invesco Ltd. | 443,929 | +37,239 |
| Bnp Paribas Financial Markets | 398,598 | +360,208 |
Insiders
6 insiders reported holding 8,789,088 shares in total, about $12M at the last price.
| Holder | Shares |
|---|---|
| Hawkins Jeffrey AlanPresident & CEO, Director | 3,639,950 |
| Keyes Jeffry R.Chief Financial Officer | 1,716,684 |
| LaPointe ChristianGC & Corp. Secretary | 1,167,913 |
| Vieceli John S.Chief Product Officer | 1,140,434 |
| Kummeth Charles R.Director | 855,000 |
| Dowdy PaulaDirector | 269,107 |
Questions about QSI
What does Quantum-Si Inc do?
Quantum-Si Inc is a company in the Industrials sector, listed on NASDAQ as QSI. Its shares trade on NASDAQ under the ticker QSI.
What is Quantum-Si Inc's net worth?
Quantum-Si Inc has a market value (market cap) of $299.9M at the latest share price, and shareholders' equity of $160.2M on its balance sheet at September 30, 2026. A company's "net worth" usually means one of these: what the market pays for all its shares, or its assets minus its liabilities.
Is Quantum-Si Inc profitable?
No. Over the twelve months to September 30, 2026 it reported a net loss of $85.1M on revenue of $1.3M.
How much revenue does Quantum-Si Inc make?
Over the twelve months to September 30, 2026 Quantum-Si Inc reported revenue of $1.3M. That is 60.2% less than a year earlier.
When did Quantum-Si Inc last report?
Its most recent periodic report is the quarterly report (10-Q) filed on November 5, 2026. It covers the period to September 30, 2026.
When is Quantum-Si Inc's next earnings report?
Quantum-Si Inc's next report is expected around March 2, 2027. That is an estimate from its filing rhythm, not a date the company has announced.
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Where the numbers come from
Financial figures are the values Quantum-Si Inc tagged in its own SEC filings (XBRL), taken from the latest filing for each period, so restatements replace older figures. Revenue, profit and cash flow are for full fiscal years unless marked as the last twelve months, which is the sum of the four most recent quarters. Where a company reports only the full year, the fourth quarter is the year minus the first three.
Prices are delayed end-of-day market data in the listing currency, and market cap moves with the price. P/E is shown only when earnings per share are positive. Nothing here is investment advice.