Are insiders buying CGEM stock?

Yes — 2 distinct insiders have bought CGEM (Cullinan Therapeutics, Inc.) on the open market, including 1 cluster buy where two or more insiders bought within a rolling window. The most recent qualifying activity was Oct 30, 2025.

How much CGEM stock have insiders bought?

Insiders have bought a combined $13.3M of CGEM across 8 open-market purchases, based on SEC Form 4 filings.

What is an insider cluster buy in CGEM?

A cluster buy is two or more distinct Cullinan Therapeutics, Inc. insiders — officers, directors, or 10% owners — each buying CGEM on the open market within a rolling window. CGEM has 1 detected cluster buy to date.

Where does this CGEM insider trading data come from?

Every figure is parsed directly from SEC Form 4 filings on EDGAR, and each purchase on this page links back to its original filing document.

CGEM insider buying

1 cluster buy

Cullinan Therapeutics, Inc. · Healthcare

When two or more insiders at Cullinan Therapeutics, Inc. buy CGEM on the open market around the same time, that clustered conviction is one of the highest-signal patterns in SEC filing data. Below is every cluster we've detected in CGEM plus the full record of qualifying open-market buys, each parsed directly from Form 4 filings and linked back to the source on SEC EDGAR.

Clusters

Distinct insiders

Total bought

$13.3M

Market cap

$1.1B

Detected clusters

Oct 8 – Oct 28, 2025
Detected Oct 28, 2025
2 insiders
Total bought
$13.3M
Market cap
$1.1B

All notable open-market buys in CGEM

Every open-market Form 4 purchase, newest first. Click an insider to see their full buying record across companies.

Date	Insider	Shares	Price	Value	Filing
Oct 28, 2025	Nichols Westoncluster 10% Owner	165,667	$8.40	$1.4M	SEC ↗
Oct 17, 2025	Lynx1 Capital Management LPcluster 10% Owner	32,217	$7.84	$252.6K	SEC ↗
Oct 16, 2025	Lynx1 Capital Management LPcluster 10% Owner	150,000	$8.86	$1.3M	SEC ↗
Oct 15, 2025	Lynx1 Capital Management LPcluster 10% Owner	51,500	$7.94	$408.9K	SEC ↗
Oct 14, 2025	Lynx1 Capital Management LPcluster 10% Owner	15,032	$7.59	$114.1K	SEC ↗
Oct 10, 2025	Lynx1 Capital Management LPcluster 10% Owner	277,298	$7.36	$2.0M	SEC ↗
Oct 9, 2025	Lynx1 Capital Management LPcluster 10% Owner	626,043	$6.70	$4.2M	SEC ↗
Oct 8, 2025	Lynx1 Capital Management LPcluster 10% Owner	556,300	$6.46	$3.6M	SEC ↗

More Healthcare stocks with insider cluster buys

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CGEM insider buying — FAQ

Are insiders buying CGEM stock?: Yes — 2 distinct insiders have bought CGEM (Cullinan Therapeutics, Inc.) on the open market, including 1 cluster buy where two or more insiders bought within a rolling window. The most recent qualifying activity was Oct 30, 2025.
How much CGEM stock have insiders bought?: Insiders have bought a combined $13.3M of CGEM across 8 open-market purchases, based on SEC Form 4 filings.
What is an insider cluster buy in CGEM?: A cluster buy is two or more distinct Cullinan Therapeutics, Inc. insiders — officers, directors, or 10% owners — each buying CGEM on the open market within a rolling window. CGEM has 1 detected cluster buy to date.
Where does this CGEM insider trading data come from?: Every figure is parsed directly from SEC Form 4 filings on EDGAR, and each purchase on this page links back to its original filing document.

How we track insider buying in CGEM

We continuously poll SEC EDGAR for new Form 4 filings and parse every open-market purchase (transaction code P). A cluster is recorded when two or more distinct insiders — officers, directors, or 10% owners — each buy CGEM within a rolling window. We track clusters at every company size, from micro-caps to mega-caps. Every figure on this page traces back to an official filing; open any row to jump straight to the source document. What counts as a cluster buy?

This page is informational and reflects public filing data. It is not investment advice or a recommendation regarding CGEM.