Form4insider filings, from the source

Company · CIK 0001609809 · SIC 2834 — Pharmaceutical Preparations · Nasdaq

Seres Therapeutics, Inc. · MCRB

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

1M3M6M1Y2YAll datashares as filed — not split-adjusted
Open-market buys & salesbuys $0 · 0sales $2,230 · 4net −$2,230
$10k$10k$100k$100k$1M$1MbuyssalesSep 2024Jan 2025May 2025Sep 2025Jan 2026May 2026Sep 2026

Reported at this company — common stock

TradeReported (ET)InsiderSharesAvg priceTotalOwned afterΔ stakeFlags
Aug 17, 2026 SForm 4 →Aug 18, 5:33 pm EDTKelly BradySee Remarks64$4.55$2918,679−0.73%10b5-1
Aug 17, 2026 SForm 4 →Aug 18, 5:27 pm EDTEric D. ShaffDirector263$4.55$1,19712,499−2.06%10b5-1
Aug 17, 2026 SForm 4 →Aug 18, 5:25 pm EDTMatthew R HennSee Remarks81$4.55$3697,995−1.00%10b5-1
Aug 17, 2026 SForm 4 →Aug 18, 5:22 pm EDTThomas DesRosierSee Remarks82$4.55$3738,117−1.00%10b5-1
Aug 15, 2026 MForm 4 →Aug 18, 5:33 pm EDTKelly BradySee Remarks181——8,743—10b5-1
Aug 15, 2026 MForm 4 →Aug 18, 5:27 pm EDTEric D. ShaffDirector722——12,762—10b5-1
Aug 15, 2026 MForm 4 →Aug 18, 5:25 pm EDTMatthew R HennSee Remarks238——8,076—10b5-1
Aug 15, 2026 MForm 4 →Aug 18, 5:22 pm EDTThomas DesRosierSee Remarks245——8,199—10b5-1

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

TradeReported (ET)InsiderSharesAvg priceTotalOwned afterΔ stakeFlags
Aug 15, 2026 MForm 4 →Aug 18, 5:33 pm EDTKelly BradySee Remarks181——548—10b5-1
Aug 15, 2026 MForm 4 →Aug 18, 5:27 pm EDTEric D. ShaffDirector722——1,993—10b5-1
Aug 15, 2026 MForm 4 →Aug 18, 5:25 pm EDTMatthew R HennSee Remarks238——585—10b5-1
Aug 15, 2026 MForm 4 →Aug 18, 5:22 pm EDTThomas DesRosierSee Remarks245——667—10b5-1
Jul 8, 2026 AForm 4 →Jul 10, 4:15 pm EDTKurt GravesDirector6,500——6,500—
Jul 8, 2026 AForm 4 →Jul 10, 4:15 pm EDTRichard N KenderSee Remarks, Director50,000——50,000—
Jul 8, 2026 AForm 4 →Jul 10, 4:15 pm EDTMatthew R HennSee Remarks25,000——25,000—
Jul 8, 2026 AForm 4 →Jul 10, 4:15 pm EDTMarella ThorellSee Remarks7,500——7,500—
Jul 8, 2026 AForm 4 →Jul 10, 4:15 pm EDTClaire FraserDirector6,500——6,500—
Jul 8, 2026 AForm 4 →Jul 10, 4:15 pm EDTWillard H DereDirector6,500——6,500—
Jul 8, 2026 AForm 4 →Jul 10, 4:15 pm EDTDennis A AusielloDirector6,500——6,500—
Jul 8, 2026 AForm 4 →Jul 10, 4:15 pm EDTEric D. ShaffDirector6,500——6,500—
Jul 8, 2026 AForm 4 →Jul 10, 4:15 pm EDTRobert L. RosielloDirector6,500——6,500—
Jul 8, 2026 AForm 4 →Jul 10, 4:15 pm EDTStephen BerensonDirector6,500——6,500—
Jul 8, 2026 AForm 4 →Jul 10, 4:15 pm EDTKelly BradySee Remarks18,750——18,750—
Jul 8, 2026 AForm 4 →Jul 10, 4:15 pm EDTThomas DesRosierSee Remarks7,500——7,500—
Jul 1, 2026 AForm 4 →Jul 2, 6:12 pm EDTStephen BerensonDirector7,508——7,508—
Jul 1, 2026 AForm 4 →Jul 2, 6:09 pm EDTRobert L. RosielloDirector7,508——7,508—
Jul 1, 2026 AForm 4 →Jul 2, 6:05 pm EDTDennis A AusielloDirector7,508——7,508—