Company · Ownership research

REPLIGEN CORP RGEN

CIK 0000730272

Form 4 transactions dated Nov 1, 2023 to Nov 12, 2026, as reported to the SEC.

Insider trading Initial holdings Institutional holders

This page lists 30 of 57 rows; the complete set is available through the API.

Insider filings on file run through Oct 8, 2026.

Insider purchases & sales

Purchased: $839.98K
Sold: $43.59M

Nov 1, 2023 – Oct 8, 2026
Available records · partial months are marked ·

20268 of 8 preview events

Date	Insider	Activity	Trade value (USD)	% of prior holding
Oct 5, 2026	Loeillot Olivier Chief Executive Officer · Director	Sale10b5-1 footnote	$1.04M 5,535 shares sold	Unavailable Direct holding	▾
Sep 24, 2026	Loeillot Olivier Chief Executive Officer · Director	Sale10b5-1 footnote	$2.46M 12,946 shares sold	Unavailable Direct holding	▾
Sep 21, 2026	Loeillot Olivier Chief Executive Officer · Director	Sale10b5-1 footnote	$976.68K 5,426 shares sold	10.09% sold Direct holding	▾
Sep 4, 2026	Loeillot Olivier Chief Executive Officer · Director	Sale10b5-1 footnote	$503.51K 3,035 shares sold	5.90% sold Direct holding	▾
Aug 20, 2026	Loeillot Olivier Chief Executive Officer · Director	Sale10b5-1 footnote	$976.68K 5,426 shares sold	9.09% sold Direct holding	▾
Jul 16, 2026	Garland Jason K CFO	Sale10b5-1 footnote	$79.50K 530 shares sold	2.74% sold Direct holding	▾
Jun 25, 2026	Garland Jason K CFO	Sale10b5-1 footnote	$106.28K 733 shares sold	3.65% sold Direct holding	▾
Apr 21, 2026	Loeillot Olivier Chief Executive Officer · Director	Sale	$536.48K 3,832 shares sold	6.60% sold Direct holding	▾

Showing 8 / 8 record groups in 2026. The complete set is available through the API.

REPLIGEN CORP · RGEN

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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 8 of 8 purchase / sale groups and 30 of 57 other groups; the totals and the monthly series cover the whole window.

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{"action":"list","ticker":"RGEN","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.