IGMS
insider transactionsIGM Biosciences, Inc. — buys & sells by directors, officers and 10% owners A shareholder owning more than 10% of the company. Must report trades, but usually a weaker signal than an officer or director. (SEC Form 4).
Net shares · 365d
-27.7K
0 buy · 27.7K sell
Net value · 365d
-$35.1K
$0 in · $35.1K out
Sentiment · 365d
Net selling
0% buying · 100% selling
Open-market trades · 365d
3
0 buy · 27.7K sell
Net buy / sell volume
Not enough data to chart yet.
Tap or hover the chart for daily net volume. Green = net buying, red = net selling.
All transactions
-
Other·D
Director
—
125.0K sh
Own -100%
-
Other·D
Director
—
7.2K sh
Own -100%
-
Other·D
Director
—
330.7K sh
Own -100%
-
Other·D
Director
—
29.8K sh
Own -100%
-
Other·D
Director
—
29.8K sh
Own -100%
-
Other·D
Director
—
22.2K sh
Own -100%
-
Other·D
Director,TenPercentOwner
$0
5.0M sh
Own -100%
-
Other·D
Director,TenPercentOwner
—
10.4M sh
Own -100%
-
Other·D
Director,TenPercentOwner
—
91.7K sh
Own -100%
-
Other·D
TenPercentOwner
$0
5.0M sh
Own -100%
-
Other·D
TenPercentOwner
—
10.4M sh
Own -100%
-
Other·D
Director,TenPercentOwner
$0
5.0M sh
Own -100%
-
Other·D
Director,TenPercentOwner
—
54.2K sh
Own -100%
-
Other·D
Director,TenPercentOwner
—
10.4M sh
Own -100%
-
Other·D
Director,TenPercentOwner
—
9.8K sh
Own -100%
-
Other·D
Director
—
2.0K sh
Own -100%
-
Other·D
Director
—
12.7K sh
Own -100%
-
Other·D
Harler Mary Beth KEY
Chief Executive Officer
—
323.7K sh
Own -100%
-
Other·D
TenPercentOwner
—
7.2M sh
Own -100%
-
Other·D
TenPercentOwner
—
667.7K sh
Own -100%
-
Other·D
TenPercentOwner
—
3.0M sh
Own -100%
-
Other·U
Other
$0
834.7K sh
-
Other·U
Other
$0
9.9M sh
-
Other·U
Other
—
3.8M sh
-
Other·U
Other
—
357.0K sh
-
Sell·S
Harler Mary Beth KEY
Chief Executive Officer
$18.4K
14.5K sh · $1.27
Own -4%
-
Sell·S
Tahir Misbah KEY
CHIEF FINANCIAL OFFICER
$11.1K
8.7K sh · $1.27
Own -5%
-
Sell·S
CHIEF BUSINESS OFFICER
$5.6K
4.4K sh · $1.27
Own -6%
-
Grant·A
Director,TenPercentOwner
$0
1.3K sh
Own +2%
-
Grant·A
Director
$0
1.5K sh
Own +7%
-
Grant·A
Director,TenPercentOwner
$0
828 sh
Own +1%
-
Grant·A
Director,TenPercentOwner
$0
953 sh
Own +0%
-
Grant·A
Director,TenPercentOwner
$0
953 sh
Own +0%
-
Grant·A
Director,TenPercentOwner
$0
828 sh
Own +0%
-
Grant·A
Director
$0
828 sh
Own +7%
-
Grant·A
Director
$0
694 sh
Own +11%
| Date▾ | Insider | Type | Shares | Value |
|---|---|---|---|---|
| Aug 14, 2025 | Strohl William | Other D | 125.0K | — |
| Aug 14, 2025 | Thompson Elizabeth H.Z. | Other D | 7.2K | — |
| Aug 14, 2025 | BEHRENS M KATHLEEN | Other D | 330.7K | — |
| Aug 14, 2025 | BEHRENS M KATHLEEN | Other D | 29.8K | — |
| Aug 14, 2025 | BEHRENS M KATHLEEN | Other D | 29.8K | — |
| Aug 14, 2025 | BEHRENS M KATHLEEN | Other D | 22.2K | — |
| Aug 14, 2025 | Topsoe Jakob Haldor | Other D | 5.0M | $0 |
| Aug 14, 2025 | Topsoe Jakob Haldor | Other D | 10.4M | — |
| Aug 14, 2025 | Topsoe Jakob Haldor | Other D | 91.7K | — |
| Aug 14, 2025 | Topsoe Holding A/S | Other D | 5.0M | $0 |
| Aug 14, 2025 | Topsoe Holding A/S | Other D | 10.4M | — |
| Aug 14, 2025 | Topsoe Christina Teng | Other D | 5.0M | $0 |
| Aug 14, 2025 | Topsoe Christina Teng | Other D | 54.2K | — |
| Aug 14, 2025 | Topsoe Christina Teng | Other D | 10.4M | — |
| Aug 14, 2025 | Topsoe Christina Teng | Other D | 9.8K | — |
| Aug 14, 2025 | Hambleton Julie | Other D | 2.0K | — |
| Aug 14, 2025 | Lee Michael Stewart | Other D | 12.7K | — |
| Aug 14, 2025 | Harler Mary Beth KEY | Other D | 323.7K | — |
| Aug 14, 2025 | Green Jeremy | Other D | 7.2M | — |
| Aug 14, 2025 | Green Jeremy | Other D | 667.7K | — |
| Aug 14, 2025 | Green Jeremy | Other D | 3.0M | — |
| Aug 14, 2025 | BAKER BROS. ADVISORS LP | Other U | 834.7K | $0 |
| Aug 14, 2025 | BAKER BROS. ADVISORS LP | Other U | 9.9M | $0 |
| Aug 14, 2025 | BAKER BROS. ADVISORS LP | Other U | 3.8M | — |
| Aug 14, 2025 | BAKER BROS. ADVISORS LP | Other U | 357.0K | — |
| Jul 23, 2025 | Harler Mary Beth KEY | Sell S | 14.5K | $18.4K |
| Jul 23, 2025 | Tahir Misbah KEY | Sell S | 8.7K | $11.1K |
| Jul 23, 2025 | Decker Lisa Lynn | Sell S | 4.4K | $5.6K |
| Jun 30, 2025 | Topsoe Christina Teng | Grant A | 1.3K | $0 |
| Jun 30, 2025 | BEHRENS M KATHLEEN | Grant A | 1.5K | $0 |
| Jun 30, 2025 | Topsoe Jakob Haldor | Grant A | 828 | $0 |
| Jun 30, 2025 | 667, L.P. | Grant A | 953 | $0 |
| Jun 30, 2025 | 667, L.P. | Grant A | 953 | $0 |
| Jun 30, 2025 | Redmile Group, LLC | Grant A | 828 | $0 |
| Jun 30, 2025 | Lee Michael Stewart | Grant A | 828 | $0 |
| Jun 30, 2025 | Thompson Elizabeth H.Z. | Grant A | 694 | $0 |
About IGMS insider trading
This page tracks insider transactions for IGM Biosciences, Inc. (IGMS) reported to the U.S. Securities and Exchange Commission on Form 4. Corporate insiders — directors, executive officers and beneficial owners of more than 10% of the stock — must disclose their trades within two business days. Open-market purchases (code P) and sales (code S) made at the insider's discretion are the most-watched opportunistic signals, while awards (A), option exercises (M) and tax-withholding (F) reflect compensation rather than conviction. Trades marked 10b5-1 were made under a pre-arranged plan and are considered routine. A cluster buy — several insiders buying within a short window — is historically a stronger bullish indicator than any single trade.