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CGEM — Cullinan Therapeutics, Inc.

Materials · Biological Products, (No Diagnostic Substances) · Nasdaq

CIK 0001789972 · FYE 1231 · All Form 4 filings on EDGAR ↗

Formerly: Cullinan Oncology, Inc. (until 2024-04-02); Cullinan Management, Inc. (until 2021-02-22); Cullinan Oncology, LLC (until 2021-01-06)

1Insiders filing

3Transactions

+$17kReported buys

−$173kReported sells

0Cluster events

Window in data: 2026-09-08 → 2026-09-08 · Data as of 2026-09-11

Insiders

Insider	Role	Txns	Reported value
Michaelson Jennifer	Chief Scientific Officer	3	$190k

Transaction history

Filing date	Trade date	Ticker	Insider	Type	Shares	Price	Value	Cluster
2026-09-10	2026-09-08	CGEM	Michaelson Jennifer Chief Scientific Officer 10b5-1	M routine	4,000	$4.30	+$17k	—
2026-09-10	2026-09-08	CGEM	Michaelson Jennifer Chief Scientific Officer 10b5-1	S	8,000	$21.57	−$173k	—
2026-09-10	2026-09-08	CGEM	Michaelson Jennifer Chief Scientific Officer 10b5-1	M routine	4,000	—	—	—

Known data limitations

Form 4 lag: insiders have 2 business days to file after a trade (weekends and holidays extend this), and this site re-ingests once daily — a transaction can appear here roughly three business days after it happened.
13F lag: quarterly 13F-HR holdings cover the prior quarter-end and are due 45 days after it — every institutional position shown here is at least 45 days old by construction, often more.
CUSIP→ticker gaps: 13F positions are reported by CUSIP; some holdings cannot be matched to a current ticker (delistings, corporate actions, thin metadata) and appear without one or are omitted from ticker-level views.
EDGAR timing variability: institutions file at different hours and days within their windows; amended filings (4/A, 13F-HR/A) can restate earlier periods, so historical aggregates may change between batches.

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