Company · Ownership research

Quantum-Si Inc QSI

CIK 0001816431

Form 4 transactions dated Sep 1, 2023 to Sep 26, 2026, as reported to the SEC.

Insider trading Initial holdings Institutional holders

Insider filings on file run through 2026-06-24.

Insider purchases & sales

Purchased: $940.96K
Sold: $12.59M

Sep 1, 2023 – Jun 24, 2026
Available records · partial months are marked ·

202510 of 23 preview events

Date	Insider	Activity	Trade value (USD)	% of prior holding
2025-12-22	Vieceli John S. Chief Product Officer	Sale	$27.98K 21,927 shares sold	2.66% sold Direct holding	▾
2025-12-22	LaPointe Christian GC & Corp. Secretary	Sale	$15.25K 11,951 shares sold	1.24% sold Direct holding	▾
2025-12-22	Keyes Jeffry R. Chief Financial Officer	Sale	$11.01K 8,627 shares sold	0.74% sold Direct holding	▾
2025-12-22	Hawkins Jeffrey Alan President & CEO · Director	Sale	$30.25K 23,707 shares sold	0.91% sold Direct holding	▾
2025-10-16	ROTHBERG JONATHAN M Director · 10% owner	Sale10b5-1 footnote	$80.11K 26,095 shares sold	1.35% sold LLC holding	▾
2025-09-23	LaPointe Christian GC & Corp. Secretary	Sale	$8.77K 5,364 shares sold	0.56% sold Direct holding	▾
2025-09-23	Hawkins Jeffrey Alan President & CEO · Director	Sale	$17.40K 10,643 shares sold	0.41% sold Direct holding	▾
2025-09-23	Vieceli John S. Chief Product Officer	Sale	$16.09K 9,843 shares sold	1.18% sold Direct holding	▾
2025-09-23	Keyes Jeffry R. Chief Financial Officer	Sale	$6.33K 3,873 shares sold	0.33% sold Direct holding	▾
2025-09-23	Bennett Todd C. Chief Commercial Officer	Sale	$30.22K 18,482 shares sold	2.64% sold Direct holding	▾

Showing 23 / 23 record groups in 2025. The complete set is available through the API.

Quantum-Si Inc · QSI

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The initial HTML of this page carries its exact data as script#research-data (JSON): values, units, scope, preview limits and SEC sources. Read it directly, no script or API key needed; script#research-access says what needs an account. For the year shown, this page lists 23 of 23 purchase / sale groups and 14 of 14 other groups; the totals and the monthly series cover the whole window.

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{"ticker":"QSI","transaction_code":["P","S"],"transaction_form_type":"4","page_size":20}

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Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.

Non-cancelled, non-derivative purchase (P) and sale (S) rows dated inside the public window, as reported. Includes open-market and private transactions. Data after the latest filing is not asserted complete and is not zero-filled. A grouped event shares filing, transaction date, security, code, direction, ownership bucket and source. Derivative groups also match underlying security, exercise price, exercise/expiration dates and footnote references. Reported rows are retained; P/S price lots can be grouped. Post-transaction balances are never summed.