STRO
insider transactionsSUTRO BIOPHARMA, 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).
No open-market buys or sells this period. The trades below are grants, option exercises and gifts, which carry no market price.
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
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Grant·A
Director
$0
10.0K sh
Own New
-
Grant·A
Director
$0
10.0K sh
Own New
-
Grant·A
Director
$0
10.0K sh
Own New
-
Grant·A
Director
$0
10.0K sh
Own New
-
Grant·A
Director
$0
10.0K sh
Own New
-
Grant·A
Director
$0
10.0K sh
Own New
-
Grant·A
Director
$0
10.0K sh
Own New
-
Exercise·M
Gregory K. Chow KEY
CFO
$0
2.5K sh
Own +50%
-
Exercise·M
Gregory K. Chow KEY
CFO
$0
2.5K sh
Own +112%
-
Exercise·M
Chief Admin. Ofcr. & GC
$0
675 sh
Own New
-
Other·F
Chief Admin. Ofcr. & GC
$5.9K
277 sh · $21.31
Own -3%
-
Exercise·M
Chief Admin. Ofcr. & GC
$0
675 sh
Own +7%
-
Exercise·M
Jane Chung KEY
Chief Executive Officer
$0
788 sh
Own New
-
Other·F
Jane Chung KEY
Chief Executive Officer
$6.0K
282 sh · $21.31
Own -1%
-
Exercise·M
Jane Chung KEY
Chief Executive Officer
$0
788 sh
Own +4%
-
Grant·A
Chief Admin. Ofcr. & GC
$0
33.6K sh
Own New
-
Grant·A
Chief Admin. Ofcr. & GC
$0
4.2K sh
Own New
-
Exercise·M
Chief Admin. Ofcr. & GC
$0
2.4K sh
Own +50%
-
Other·F
Chief Admin. Ofcr. & GC
$19.9K
970 sh · $20.55
Own -9%
-
Exercise·M
Chief Admin. Ofcr. & GC
$0
2.4K sh
Own +30%
-
Grant·A
CHIEF SCIENTIFIC OFFICER
$0
40.0K sh
Own New
-
Grant·A
CHIEF SCIENTIFIC OFFICER
$0
5.0K sh
Own New
-
Exercise·M
CHIEF SCIENTIFIC OFFICER
$0
2.8K sh
Own +50%
-
Other·F
CHIEF SCIENTIFIC OFFICER
$24.0K
1.2K sh · $20.55
Own -11%
-
Exercise·M
CHIEF SCIENTIFIC OFFICER
$0
2.8K sh
Own +36%
-
Grant·A
Jane Chung KEY
Chief Executive Officer
$0
175.0K sh
Own New
-
Grant·A
Jane Chung KEY
Chief Executive Officer
$0
40.0K sh
Own New
-
Exercise·M
Jane Chung KEY
Chief Executive Officer
$0
7.8K sh
Own +50%
-
Other·F
Jane Chung KEY
Chief Executive Officer
$57.1K
2.8K sh · $20.55
Own -12%
-
Exercise·M
Jane Chung KEY
Chief Executive Officer
$0
7.8K sh
Own +49%
-
Grant·A
Gregory K. Chow KEY
CFO
$0
5.0K sh
Own New
-
Grant·A
Gregory K. Chow KEY
CFO
$0
40.0K sh
Own New
-
Exercise·M
Chief Admin. Ofcr. & GC
$0
842 sh
Own +100%
-
Exercise·M
Chief Admin. Ofcr. & GC
$0
500 sh
Own New
-
Other·F
Chief Admin. Ofcr. & GC
$11.3K
551 sh · $20.47
Own -6%
-
Exercise·M
Chief Admin. Ofcr. & GC
$0
842 sh
Own +11%
-
Exercise·M
Chief Admin. Ofcr. & GC
$0
500 sh
Own +7%
-
Exercise·M
CHIEF SCIENTIFIC OFFICER
$0
1.1K sh
Own +100%
-
Other·F
CHIEF SCIENTIFIC OFFICER
$9.5K
463 sh · $20.47
Own -6%
-
Exercise·M
CHIEF SCIENTIFIC OFFICER
$0
1.1K sh
Own +16%
-
Exercise·M
Jane Chung KEY
Chief Executive Officer
$0
2.5K sh
Own +100%
-
Exercise·M
Jane Chung KEY
Chief Executive Officer
$0
688 sh
Own New
-
Other·F
Jane Chung KEY
Chief Executive Officer
$26.0K
1.3K sh · $20.47
Own -7%
-
Exercise·M
Jane Chung KEY
Chief Executive Officer
$0
2.5K sh
Own +17%
-
Exercise·M
Jane Chung KEY
Chief Executive Officer
$0
688 sh
Own +5%
| Date▾ | Insider | Type | Shares | Value |
|---|---|---|---|---|
| Jun 5, 2026 | Jon Marc Wigginton | Grant A | 10.0K | $0 |
| Jun 5, 2026 | Daniel H Petree | Grant A | 10.0K | $0 |
| Jun 5, 2026 | James P Panek | Grant A | 10.0K | $0 |
| Jun 5, 2026 | Connie Matsui | Grant A | 10.0K | $0 |
| Jun 5, 2026 | Joseph M Lobacki | Grant A | 10.0K | $0 |
| Jun 5, 2026 | Sukhi Jagpal | Grant A | 10.0K | $0 |
| Jun 5, 2026 | Heidi Hunter | Grant A | 10.0K | $0 |
| Jun 2, 2026 | Gregory K. Chow KEY | Exercise M | 2.5K | $0 |
| Jun 2, 2026 | Gregory K. Chow KEY | Exercise M | 2.5K | $0 |
| Mar 4, 2026 | David Pauling | Exercise M | 675 | $0 |
| Mar 4, 2026 | David Pauling | Other F | 277 | $5.9K |
| Mar 4, 2026 | David Pauling | Exercise M | 675 | $0 |
| Mar 4, 2026 | Jane Chung KEY | Exercise M | 788 | $0 |
| Mar 4, 2026 | Jane Chung KEY | Other F | 282 | $6.0K |
| Mar 4, 2026 | Jane Chung KEY | Exercise M | 788 | $0 |
| Mar 2, 2026 | David Pauling | Grant A | 33.6K | $0 |
| Mar 2, 2026 | David Pauling | Grant A | 4.2K | $0 |
| Mar 2, 2026 | David Pauling | Exercise M | 2.4K | $0 |
| Mar 2, 2026 | David Pauling | Other F | 970 | $19.9K |
| Mar 2, 2026 | David Pauling | Exercise M | 2.4K | $0 |
| Mar 2, 2026 | Hans-Peter Gerber | Grant A | 40.0K | $0 |
| Mar 2, 2026 | Hans-Peter Gerber | Grant A | 5.0K | $0 |
| Mar 2, 2026 | Hans-Peter Gerber | Exercise M | 2.8K | $0 |
| Mar 2, 2026 | Hans-Peter Gerber | Other F | 1.2K | $24.0K |
| Mar 2, 2026 | Hans-Peter Gerber | Exercise M | 2.8K | $0 |
| Mar 2, 2026 | Jane Chung KEY | Grant A | 175.0K | $0 |
| Mar 2, 2026 | Jane Chung KEY | Grant A | 40.0K | $0 |
| Mar 2, 2026 | Jane Chung KEY | Exercise M | 7.8K | $0 |
| Mar 2, 2026 | Jane Chung KEY | Other F | 2.8K | $57.1K |
| Mar 2, 2026 | Jane Chung KEY | Exercise M | 7.8K | $0 |
| Mar 2, 2026 | Gregory K. Chow KEY | Grant A | 5.0K | $0 |
| Mar 2, 2026 | Gregory K. Chow KEY | Grant A | 40.0K | $0 |
| Mar 1, 2026 | David Pauling | Exercise M | 842 | $0 |
| Mar 1, 2026 | David Pauling | Exercise M | 500 | $0 |
| Mar 1, 2026 | David Pauling | Other F | 551 | $11.3K |
| Mar 1, 2026 | David Pauling | Exercise M | 842 | $0 |
| Mar 1, 2026 | David Pauling | Exercise M | 500 | $0 |
| Mar 1, 2026 | Hans-Peter Gerber | Exercise M | 1.1K | $0 |
| Mar 1, 2026 | Hans-Peter Gerber | Other F | 463 | $9.5K |
| Mar 1, 2026 | Hans-Peter Gerber | Exercise M | 1.1K | $0 |
| Mar 1, 2026 | Jane Chung KEY | Exercise M | 2.5K | $0 |
| Mar 1, 2026 | Jane Chung KEY | Exercise M | 688 | $0 |
| Mar 1, 2026 | Jane Chung KEY | Other F | 1.3K | $26.0K |
| Mar 1, 2026 | Jane Chung KEY | Exercise M | 2.5K | $0 |
| Mar 1, 2026 | Jane Chung KEY | Exercise M | 688 | $0 |
About STRO insider trading
This page tracks insider transactions for SUTRO BIOPHARMA, INC. (STRO) 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.