IGM Biosciences, Inc.
IGMSDelisted Aug 14, 2025- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0001496323
IGM Biosciences, Inc. was delisted on Aug 14, 2025; its insiders filed their last Form 4 on Aug 18, 2025; 66 institutions reported holding it in 13F filings for Q2 2025, worth $17.9M in total; no superinvestor held it.
Holders of 5% or more of IGMS
Holders whose latest Schedule 13D or 13G filing reports 5% or more of IGM Biosciences, Inc., largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| Price T Rowe Associates Inc | 13G/A | 10.50%3.57M shares | +10.30 ppfrom 0.20% | Feb 7, 20252 filings | Feb 14, 2025 | SEC |
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
7 Schedule 13D and 13G filings on IGM Biosciences, Inc., newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Nov 13, 20254:44 PM ET | Glazer Capital, LLCand 1 other | 13G/A | 0.00%0 shares | −7.30 ppfrom 7.30%Below 5% | Sep 30, 2025 | SEC |
| Aug 18, 20255:52 PM ET | Baker Bros. Advisors LPand 3 others | 13D/A | 0.00%0 shares | –Below 5% | Aug 14, 2025 | SEC |
| Aug 18, 20254:31 PM ET | Topsoe Holding A/Sand 6 others | 13D/A | 0.00%0 shares | –Below 5% | Aug 14, 2025 | SEC |
| Aug 15, 20255:01 PM ET | Redmile Group, LLCand 1 other | 13D/A | 0.00%0 shares | –Below 5% | Aug 14, 2025 | SEC |
| Jul 9, 20255:21 PM ET | Glazer Capital, LLCand 1 other | 13G | 7.30%2.53M shares | New | Jul 2, 2025 | SEC |
| Feb 14, 20259:44 AM ET | Price T Rowe Associates Inc | 13G/A | 10.50%3.57M shares | +10.30 ppfrom 0.20% | Dec 31, 2024 | SEC |
| Feb 7, 202511:55 AM ET | Price T Rowe Associates Inc | 13G/A | 0.20%65.9K shares | –Below 5% | Jan 31, 2025 | SEC |
Form 144: proposed insider sales
Notices from officers, directors and other affiliates planning to sell IGM Biosciences, Inc. shares.
No Form 144 notices for IGM Biosciences, Inc. are on file.