Form4insider filings, from the source

Company · CIK 0001789972 · SIC 2836 — Biological Products, (No Diagnostic Substances) · Nasdaq

Cullinan Therapeutics, Inc. · CGEM

Insider activity reported against this company. All insider holders · On EDGAR ↗

1M3M6M1Y2YAll datashares as filed — not split-adjusted
Open-market buys & salesbuys $0 · 0sales $923k · 3net −$923k
$10k$10k$100k$100k$1M$1MbuyssalesJul 5Jul 16Jul 27Aug 7Aug 18Aug 29Sep 9

Reported at this company — common stock

TradeReported (ET)InsiderSharesAvg priceTotalOwned afterΔ stakeFlags
Sep 8, 2026 SForm 4 →Sep 10, 9:22 am EDTJennifer MichaelsonChief Scientific Officer8,000$21.57$172,560158,844−4.79%10b5-1
Sep 8, 2026 MForm 4 →Sep 10, 9:22 am EDTJennifer MichaelsonChief Scientific Officer4,000$4.30$17,200166,844—10b5-1
Aug 13, 2026 SForm 4 →Aug 14, 5:00 pm EDTJennifer MichaelsonChief Scientific Officer30,000$20.26$607,800162,844−15.6%10b5-1
Aug 13, 2026 MForm 4 →Aug 14, 5:00 pm EDTJennifer MichaelsonChief Scientific Officer30,000$4.30$129,000192,844—10b5-1
Jul 6, 2026 SForm 4 →Jul 7, 5:00 pm EDTJennifer MichaelsonChief Scientific Officer8,000$17.82$142,560162,844−4.68%10b5-1
Jul 6, 2026 MForm 4 →Jul 7, 5:00 pm EDTJennifer MichaelsonChief Scientific Officer4,000$4.30$17,200170,844—10b5-1
Jun 30, 2026 AForm 4 →Jul 2, 5:00 pm EDTJacquelyn L SumerChief Legal Officer2,470$8.60$21,242130,559—
Jun 30, 2026 AForm 4 →Jul 2, 5:00 pm EDTMary Kay FentonChief Financial Officer1,541$8.60$13,253127,921—

Reported at this company — derivatives (options, RSUs, warrants)

TradeReported (ET)InsiderSharesAvg priceTotalOwned afterΔ stakeFlags
Sep 8, 2026 MForm 4 →Sep 10, 9:22 am EDTJennifer MichaelsonChief Scientific Officer4,000——78,987—10b5-1
Aug 13, 2026 MForm 4 →Aug 14, 5:00 pm EDTJennifer MichaelsonChief Scientific Officer30,000——82,987—10b5-1
Jul 6, 2026 MForm 4 →Jul 7, 5:00 pm EDTJennifer MichaelsonChief Scientific Officer4,000——112,987—10b5-1
Jun 16, 2026 AForm 4 →Jun 18, 5:00 pm EDTAnthony RosenbergDirector25,319——25,319—
Jun 16, 2026 AForm 4 →Jun 18, 5:00 pm EDTDavid D. MeekDirector25,319——25,319—
Jun 16, 2026 AForm 4 →Jun 18, 5:00 pm EDTStephen W WebsterDirector25,319——25,319—
Jun 16, 2026 AForm 4 →Jun 18, 5:00 pm EDTAndrew R AllenDirector21,781——21,781—
Jun 16, 2026 AForm 4 →Jun 18, 5:00 pm EDTMary ThistleDirector25,319——25,319—
Jun 16, 2026 AForm 4 →Jun 18, 5:00 pm EDTMittie DoyleDirector21,781——21,781—