Company · Ownership research

Tectonic Therapeutic, Inc. TECX

CIK 0001681087

Form 4 transactions dated Nov 1, 2023 to Nov 7, 2026, as reported to the SEC.

Insider trading Initial holdings Institutional holders

This page lists 30 of 55 rows; the complete set is available through the API.

Insider filings on file run through Oct 28, 2026.

Insider purchases & sales

Purchased: $63.77M
Sold: $9.20M

Nov 1, 2023 – Oct 28, 2026
Available records · partial months are marked ·

20244 of 4 preview events

Date	Insider	Activity	Trade value (USD)	% of prior holding
Oct 22, 2024	SPRINGER TIMOTHY A Director · 10% owner	Purchase	$10.08M 300,000 shares bought	7.90% added Direct holding	▾
Sep 26, 2024	SPRINGER TIMOTHY A Director · 10% owner	Purchase	$1.44M 50,000 shares bought	1.33% added Direct holding	▾
May 14, 2024	Leonard Braden Michael 10% owner	Purchase	$385.95K 296,882 shares bought	6.64% added Indirect holding	▾
May 13, 2024	Leonard Braden Michael 10% owner	Purchase	$585.55K 469,753 shares bought	11.74% added Indirect holding	▾

Showing 4 / 4 record groups in 2024. The complete set is available through the API.

Tectonic Therapeutic, Inc. · TECX

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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 4 of 4 purchase / sale groups and 30 of 55 other groups; the totals and the monthly series cover the whole window.

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{"action":"list","ticker":"TECX","transaction_code":["P","S"],"transaction_form_type":"4","page_size":20}

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Sources, coverage & how to read this data

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. Share totals are on today's split-adjusted basis. 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.