IGM Biosciences, Inc. (IGMS) Insider Trading & SEC Filings

Updated Jul 16, 2026 · Last SEC filing 2025-08-14

IGM Biosciences, Inc. (IGMS) — no SEC Form 4 insider filings recorded in the last 90 days. InsiderAlpha tracks every IGMS SEC filing — Form 4, Form 144, and 8-K — in real time, including Rule 10b5-1 plan detection.

About IGM Biosciences, Inc. (IGMS)

SEC CIK	0001496323

Recent IGMS Insider Transactions (Form 4)

Date	Insider	Role	Transaction	Shares	Price	Value	Filing
2025-08-14	Topsoe Christina Teng	Insider	D — Derivative transaction	54.2K	—	—	SEC
2025-08-14	Topsoe Holding A/S	Insider	D — Derivative transaction	10.40M	—	—	SEC
2025-08-14	Thompson Elizabeth H.Z.	Insider	D — Derivative transaction	7.2K	—	—	SEC
2025-08-14	Harler Mary Beth	Chief Executive Officer	D — Derivative transaction	323.7K	—	—	SEC
2025-08-14	BAKER BROS. ADVISORS LP	Insider	J — Other acquisition / disposition	357.0K	—	—	SEC
2025-08-14	Topsoe Christina Teng	Insider	D — Derivative transaction	9.8K	—	—	SEC
2025-08-14	BEHRENS M KATHLEEN	Insider	D — Derivative transaction	29.8K	—	—	SEC
2025-08-14	BAKER BROS. ADVISORS LP	Insider	J — Other acquisition / disposition	3.76M	—	—	SEC
2025-08-14	Redmile Group, LLC	Director	D — Derivative transaction	2.96M	—	—	SEC
2025-08-14	BEHRENS M KATHLEEN	Insider	D — Derivative transaction	22.2K	—	—	SEC
2025-08-14	BEHRENS M KATHLEEN	Insider	D — Derivative transaction	330.7K	—	—	SEC
2025-08-14	Strohl William	Insider	D — Derivative transaction	125.0K	—	—	SEC
2025-08-14	BEHRENS M KATHLEEN	Insider	D — Derivative transaction	29.8K	—	—	SEC
2025-08-14	Topsoe Christina Teng	Insider	D — Derivative transaction	10.40M	—	—	SEC
2025-08-14	Topsoe Jakob Haldor	Insider	D — Derivative transaction	91.7K	—	—	SEC

All transactions sourced from SEC EDGAR Form 4 filings for IGM Biosciences, Inc. (IGMS). Updated in real time as new filings are submitted to the SEC.

Recent Insider Filings

2025-08-14 — Strohl William (Insider)
2025-08-14 — BEHRENS M KATHLEEN (Insider)
2025-08-14 — BAKER BROS. ADVISORS LP (Insider)
2025-08-14 — Redmile Group, LLC (Director)
2025-08-14 — Thompson Elizabeth H.Z. (Insider)

Form 4 Transaction Code Reference

SEC Form 4 transactions are reported with a one-letter code indicating the type of transaction. Common codes you'll see in IGMS insider filings:

P	Open-market purchase by the insider
S	Open-market sale by the insider
A	Grant, award, or other acquisition from the issuer
M	Exercise or conversion of derivative security (e.g. options)
F	Payment of exercise price or tax liability via share withholding
G	Bona-fide gift of securities
D	Disposition to the issuer (e.g. share buyback participation)
J	Other acquisition or disposition
X	Exercise of in-the-money or at-the-money derivative security
C	Conversion of derivative security
V	Transaction voluntarily reported earlier than required

IGMS Insider Trading — FAQ

What is the latest insider trade for IGMS?: IGM Biosciences, Inc. (IGMS) had 0 insider filings in the last 90 days, with the most recent on 2025-08-14. InsiderAlpha tracks every Form 4, 10-K, 10-Q, and 8-K filing in real time.
How many insiders are buying IGMS stock?: 0 insider purchases of IGMS were filed in the last 90 days.
How many insiders are selling IGMS stock?: 0 insider sales of IGMS were filed in the last 90 days.
Where can I see IGMS SEC filings (Form 4, 10-K, 10-Q, 8-K)?: InsiderAlpha aggregates every IGMS SEC filing — Form 4 insider transactions, 10-K and 10-Q quarterly reports, and 8-K material event disclosures — in one timeline.

Learn More

Open the live IGMS dashboard on InsiderAlpha for real-time alerts, charting, and full historical filing search.