IGM BIOSCIENCES INC IGMS
COM · Common Stock · CUSIP 449585108
67
institutional holders
-13 vs Q1 2025
16.0m
shares reported held*
$17.9mreported value*
9 new
14 added
32 reduced
23 sold out
net sold ≈ $2.0m (-1.8m shares)
* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once. Holder counts are more reliable. Implied quarter-end price ≈ $1.12. Options: 2 managers hold calls ($2.0k notional), 1 hold puts ($0).
Trends to Q2 2025
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q3 2022 | 93 |
| Q4 2022 | 82 |
| Q1 2023 | 75 |
| Q2 2023 | 80 |
| Q3 2023 | 80 |
| Q4 2023 | 73 |
| Q1 2024 | 88 |
| Q2 2024 | 83 |
| Q3 2024 | 73 |
| Q4 2024 | 86 |
| Q1 2025 | 80 |
| Q2 2025 | 67 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Bought or addedCut or sold out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q3 2023 | 41 | 35 |
| Q4 2023 | 37 | 45 |
| Q1 2024 | 48 | 33 |
| Q2 2024 | 50 | 34 |
| Q3 2024 | 32 | 43 |
| Q4 2024 | 37 | 24 |
| Q1 2025 | 40 | 49 |
| Q2 2025 | 23 | 55 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
CallsPuts
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q3 2024 | $1.2m | $863.4k | 0.72 |
| Q4 2024 | $376.5k | $224.2k | 0.60 |
| Q1 2025 | $31.8k | $920 | 0.03 |
| Q2 2025 | $2.0k | $0 | 0.00 |
Biggest buyers
| MILLENNIUM MANAGEMENT LLC | New | +275.1k |
| JANE STREET GROUP, LLC | New | +181.0k |
| RENAISSANCE TECHNOLOGIES LLC | Added | +82.4k |
| ROYAL BANK OF CANADA | Added | +79.1k |
| GOLDMAN SACHS GROUP INC | Added | +61.9k |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | +55.1k |
| MARSHALL WACE, LLP | New | +44.3k |
| XTX Topco Ltd | New | +26.5k |
| SG Americas Securities, LLC | New | +15.3k |
| Ground Swell Capital, LLC | New | +11.8k |
Biggest sellers
| BlackRock, Inc. | Reduced | -645.0k |
| GSA CAPITAL PARTNERS LLP | Sold out | -425.3k |
| STATE STREET CORP | Reduced | -417.8k |
| GEODE CAPITAL MANAGEMENT, LLC | Reduced | -212.4k |
| VANGUARD GROUP INC | Reduced | -108.4k |
| Bruce & Co., Inc. | Sold out | -100.0k |
| NORTHERN TRUST CORP | Reduced | -79.4k |
| AQR CAPITAL MANAGEMENT LLC | Reduced | -74.7k |
| Verition Fund Management LLC | Reduced | -70.1k |
| Nuveen, LLC | Sold out | -45.0k |
Biggest calls
| SIMPLEX TRADING, LLC | Added | $2.0k2.5k shares |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | Unchanged | $00 shares |
Biggest puts
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | Unchanged | $00 shares |
Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.
Major shareholders (over 5%)
Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.
| Holder | Stake |
|---|---|
| PRICE T ROWE ASSOCIATES INC /MD/ 13G · institution +10.3 pts · filed 2025-02-14 | 10.5% |
Fell to 5% or below in the last year: GLAZER CAPITAL, LLC (0.0%, 2025-11-13)
Holders, Q2 2025
| Manager | Shares | Change |
|---|---|---|
| BAKER BROS. ADVISORS LP 0.04% of their portfolio | 4.1m $4.6m | Added +953 |
| Siren, L.L.C. 0.19% of their portfolio | 3.3m $3.6m | Unchanged |
| Redmile Group, LLC 0.35% of their portfolio | 3.0m $3.3m | Unchanged |
| Sanofi 0.92% of their portfolio | 1.4m $1.6m | Unchanged |
| GOLDMAN SACHS GROUP INC 0.00% of their portfolio | 855.3k $957.9k | Added +61.9k |
| VANGUARD GROUP INC 0.00% of their portfolio | 767.2k $859.2k | Reduced -108.4k |
| BlackRock, Inc. 0.00% of their portfolio | 385.5k $431.7k | Reduced -645.0k |
| MILLENNIUM MANAGEMENT LLC 0.00% of their portfolio | 275.1k $308.1k | New |
| GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 213.3k $239.0k | Reduced -212.4k |
| JANE STREET GROUP, LLC 0.00% of their portfolio | 181.0k $202.7k | New |
| AQR CAPITAL MANAGEMENT LLC 0.00% of their portfolio | 164.2k $183.9k | Reduced -74.7k |
| RENAISSANCE TECHNOLOGIES LLC 0.00% of their portfolio | 117.7k $131.9k | Added +82.4k |
| NORTHERN TRUST CORP 0.00% of their portfolio | 107.6k $120.5k | Reduced -79.4k |
| TWO SIGMA INVESTMENTS, LP 0.00% of their portfolio | 104.3k $116.8k | Reduced -35.5k |
| Eagle Bay Advisors LLC 0.09% of their portfolio | 99.6k $111.6k | Unchanged |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio | 89.7k $100.5k | Reduced -35.9k |
| TWO SIGMA ADVISERS, LP 0.00% of their portfolio | 82.7k $92.6k | Reduced -7.8k |
| ROYAL BANK OF CANADA 0.00% of their portfolio | 81.5k $90.0k | Added +79.1k |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.00% of their portfolio | 80.3k $89.9k | Added +55.1k |
| STATE STREET CORP 0.00% of their portfolio | 75.9k $85.0k | Reduced -417.8k |
| Woodline Partners LP 0.00% of their portfolio | 69.6k $77.9k | Unchanged |
| Verition Fund Management LLC 0.00% of their portfolio | 49.0k $54.8k | Reduced -70.1k |
| ACADIAN ASSET MANAGEMENT LLC 0.00% of their portfolio | 45.3k $50.0k | Reduced -40.6k |
| MARSHALL WACE, LLP 0.00% of their portfolio | 44.3k $49.6k | New |
| Qube Research & Technologies Ltd 0.00% of their portfolio | 39.3k $44.1k | Added +6.5k |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.00% of their portfolio | 35.2k $40.0k | Reduced -7.7k |
| IEQ CAPITAL, LLC 0.00% of their portfolio | 27.4k $30.7k | Reduced -10.0k |
| XTX Topco Ltd 0.00% of their portfolio | 26.5k $29.6k | New |
| MORGAN STANLEY 0.00% of their portfolio | 20.1k $22.5k | Reduced -14.4k |
| SG Americas Securities, LLC 0.00% of their portfolio | 15.3k $17.0k | New |
| Vanguard Personalized Indexing Management, LLC 0.00% of their portfolio | 14.9k $16.7k | Added +1.1k |
| Tower Research Capital LLC (TRC) 0.00% of their portfolio | 13.4k $15.0k | Added +6.2k |
| CAPTRUST FINANCIAL ADVISORS 0.00% of their portfolio | 12.6k $14.1k | Reduced -733 |
| Cubist Systematic Strategies, LLC 0.00% of their portfolio | 12.3k $13.8k | Added +2.4k |
| TWO SIGMA SECURITIES, LLC 0.00% of their portfolio | 11.9k $13.4k | Reduced -1.5k |
| Cerity Partners LLC 0.00% of their portfolio | 11.9k $13.4k | Reduced -1.2k |
| Ground Swell Capital, LLC 0.02% of their portfolio | 11.8k $13.3k | New |
| CWM, LLC 0.00% of their portfolio | 11.3k $13.0k | Reduced -4.3k |
| Point72 Asia (Singapore) Pte. Ltd. 0.00% of their portfolio | 11.1k $12.5k | New |
| CITIGROUP INC 0.00% of their portfolio | 9.0k $10.1k | Reduced -2.7k |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 8.9k $10.0k | Reduced -2.4k |
| FEDERATED HERMES, INC. 0.00% of their portfolio | 8.0k $8.9k | Added +2.0k |
| DEUTSCHE BANK AG\ 0.00% of their portfolio | 7.5k $8.4k | Reduced -39.3k |
| FMR LLC 0.00% of their portfolio | 7.3k $8.2k | Added +1.8k |
| AlphaQuest LLC 0.00% of their portfolio | 7.0k $7.9k | Unchanged |
| China Universal Asset Management Co., Ltd. 0.00% of their portfolio | 7.0k $7.8k | Added +140 |
| UBS Group AG 0.00% of their portfolio | 4.6k $5.2k | Reduced -36.5k |
| BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio | 3.1k $3.5k | Reduced -9 |
| BARCLAYS PLC 0.00% of their portfolio | 2.8k $3.1k | Reduced -16.4k |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 1.7k $1.9k | Reduced -8.2k |
| Mirae Asset Global Investments Co., Ltd. 0.00% of their portfolio | 1.3k $1.5k | Added +265 |
| RAYMOND JAMES FINANCIAL INC 0.00% of their portfolio | 1.3k $1.5k | New |
| RHUMBLINE ADVISERS 0.00% of their portfolio | 976 $1.1k | Reduced -20.4k |
| Capital Advisors, Ltd. LLC 0.00% of their portfolio | 776 $1.0k | Added +518 |
| GF FUND MANAGEMENT CO. LTD. 0.00% of their portfolio | 716 $802 | Unchanged |
| NISA INVESTMENT ADVISORS, LLC 0.00% of their portfolio | 563 $631 | Reduced -165 |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 524 $587 | Reduced -7.1k |
| OSAIC HOLDINGS, INC. 0.00% of their portfolio | 400 $448 | Unchanged |
| Point72 (DIFC) Ltd 0.00% of their portfolio | 388 $435 | Reduced -456 |
| EverSource Wealth Advisors, LLC 0.00% of their portfolio | 317 $355 | Reduced -20 |
| Clearstead Advisors, LLC 0.00% of their portfolio | 61 $69 | New |
| SBI Securities Co., Ltd. 0.00% of their portfolio | 22 $25 | Unchanged |
| US BANCORP \DE\ 0.00% of their portfolio | 17 $19 | Unchanged |
| Essential Partners LLC 0.00% of their portfolio | 16 $18 | First filing |
| True Wealth Design, LLC 0.00% of their portfolio | 14 $16 | Reduced -257 |
| PNC Financial Services Group, Inc. 0.00% of their portfolio | 5 $6 | Reduced -849 |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. — of their portfolio | 0 $0 | Unchanged |