Company · Ownership research

Annexon, Inc. ANNX

CIK 0001528115

Form 4 transactions dated Sep 1, 2023 to Sep 30, 2026, as reported to the SEC.

Insider trading Initial holdings Institutional holders

Insider filings on file run through 2026-06-15.

Insider purchases & sales

Purchased: $10.08M
Sold: $829.42K

Sep 1, 2023 – Jun 15, 2026
Available records · partial months are marked ·

202510 of 25 preview events

Date	Insider	Activity	Trade value (USD)	% of prior holding
2025-12-30	Carson William H. Director	Purchase10b5-1 footnote	$20.66K 4,115 shares bought	8.18% added Direct holding	▾
2025-12-01	Carson William H. Director	Purchase10b5-1 footnote	$18.39K 4,115 shares bought	8.91% added Direct holding	▾
2025-12-01	Choi Jung Director	Purchase	$138.27K 33,000 shares bought	New holding Trust holding	▾
2025-11-21	Satter Muneer A Director	Purchase	$1.81M 422,613 shares bought	4.54% added Indirect holding	▾
2025-11-20	Satter Muneer A Director	Purchase	$1.79M 400,000 shares bought	4.49% added Indirect holding	▾
2025-11-19	Satter Muneer A Director	Purchase	$1.97M 500,000 shares bought	5.95% added Indirect holding	▾
2025-11-18	Satter Muneer A Director	Purchase	$1.59M 500,000 shares bought	6.32% added Indirect holding	▾
2025-11-17	Satter Muneer A Director	Purchase	$1.50M 500,000 shares bought	6.75% added Indirect holding	▾
2025-10-30	Carson William H. Director	Purchase10b5-1 footnote	$13.04K 4,115 shares bought	9.78% added Direct holding	▾
2025-09-30	Carson William H. Director	Purchase10b5-1 footnote	$12.55K 4,115 shares bought	10.84% added Direct holding	▾

Showing 25 / 25 record groups in 2025. The complete set is available through the API.

Annexon, Inc. · ANNX

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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 25 of 25 purchase / sale groups and 16 of 16 other groups; the totals and the monthly series cover the whole window.

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{"ticker":"ANNX","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.