SUTRO BIOPHARMA, INC. (STRO)
$20.45-$0.86 (-4.04%) Today
Jane Chung - Officer
David Pauling - OfficerSutro Biopharma Inc is a clinical-stage drug discovery, development, and manufacturing company. The company manufactures next-generation protein therapeutics for cancer and autoimmune disorders through its proprietary integrated cell-free protein synthesis platform, XpressCF. Products offered by the company include STRO-001 for patients with multiple myeloma and lymphoma and STRO-002 for the treatment of ovarian and endometrial cancers. Company's wholly-owned product candidate is STRO-004, a single homogeneous ADC directed against tissue factor which are developing for the treatment of solid tumors. The company also pipeline contains STRO-006, STRO-00X, STRO-00Y, STRO-003, VAX24, VAX31, and Others.
| Form 4 transaction type | Transactions | Shares | Total value |
|---|---|---|---|
| Grant or award | 8 | 80,000 | |
| Option exercise | 2 | 5,000 |
Dollar totals are shown for open-market purchases and sales only. Grants, option exercises, gifts and tax withholding are reported by share count because they are not trades at a market price.
30 Form 4 filings on record, the earliest from Dec 3, 2024, newest first.
| Date | Insider | Transaction | Security | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Jon Marc Wigginton | Grant or award | Stock Option (right to buy) | 10,000 | $0.00 | - | |
| Daniel H. Petree | Grant or award | Stock Option (right to buy) | 10,000 | $0.00 | - | |
| James P. Panek | Grant or award | Stock Option (right to buy) | 10,000 | $0.00 | - | |
| Joseph M. Lobacki | Grant or award | Stock Option (right to buy) | 10,000 | $0.00 | - | |
| Sukhi Jagpal | Grant or award | Stock Option (right to buy) | 10,000 | $0.00 | - | |
| Heidi Hunter | Grant or award | Stock Option (right to buy) | 10,000 | $0.00 | - | |
| Michael Dybbs | Grant or award | Stock Option (right to buy) | 10,000 | $0.00 | - | |
| Connie Matsui | Grant or award | Stock Option (right to buy) | 10,000 | $0.00 | - | |
| Gregory K. Chow - Officer | Option exercise | Common Stock | 2,500 | $0.00 | - | |
| Gregory K. Chow - Officer | Option exercise | Restricted Stock Units (RSUs) | 2,500 | $0.00 | - | |
| David Pauling - Officer | Option exercise | Common Stock | 675 | $0.00 | - | |
| David Pauling - Officer | Tax withholding / forfeiture | Common Stock | 277 | $21.31 | $6K | |
| David Pauling - Officer | Option exercise | Restricted Stock Units (RSUs) | 675 | $0.00 | - | |
| Jane Chung - Officer | Option exercise | Restricted Stock Units (RSUs) | 788 | $0.00 | - | |
| Jane Chung - Officer | Option exercise | Common Stock | 788 | $0.00 | - | |
| Jane Chung - Officer | Tax withholding / forfeiture | Common Stock | 282 | $21.31 | $6K | |
| David Pauling - Officer | Option exercise | Restricted Stock Units (RSUs) | 842 | $0.00 | - | |
| David Pauling - Officer | Option exercise | Common Stock | 500 | $0.00 | - | |
| David Pauling - Officer | Option exercise | Common Stock | 842 | $0.00 | - | |
| David Pauling - Officer | Option exercise | Common Stock | 2,356 | $0.00 | - | |
| David Pauling - Officer | Tax withholding / forfeiture | Common Stock | 551 | $20.47 | $11K | |
| David Pauling - Officer | Tax withholding / forfeiture | Common Stock | 970 | $20.55 | $20K | |
| David Pauling - Officer | Option exercise | Restricted Stock Units (RSUs) | 500 | $0.00 | - | |
| David Pauling - Officer | Option exercise | Restricted Stock Units (RSUs) | 2,356 | $0.00 | - | |
| David Pauling - Officer | Grant or award | Restricted Stock Units (RSUs) | 4,200 | $0.00 | - | |
| David Pauling - Officer | Grant or award | Stock Option (right to buy) | 33,600 | $0.00 | - | |
| Hans-Peter Gerber - Officer | Option exercise | Restricted Stock Units (RSUs) | 1,125 | $0.00 | - | |
| Hans-Peter Gerber - Officer | Option exercise | Restricted Stock Units (RSUs) | 2,843 | $0.00 | - | |
| Hans-Peter Gerber - Officer | Grant or award | Restricted Stock Units (RSUs) | 5,000 | $0.00 | - | |
| Hans-Peter Gerber - Officer | Grant or award | Stock Option (right to buy) | 40,000 | $0.00 | - | |
| Hans-Peter Gerber - Officer | Option exercise | Common Stock | 1,125 | $0.00 | - | |
| Hans-Peter Gerber - Officer | Option exercise | Common Stock | 2,843 | $0.00 | - | |
| Hans-Peter Gerber - Officer | Tax withholding / forfeiture | Common Stock | 463 | $20.47 | $9K | |
| Hans-Peter Gerber - Officer | Tax withholding / forfeiture | Common Stock | 1,170 | $20.55 | $24K | |
| Gregory K. Chow - Officer | Grant or award | Stock Option (right to buy) | 40,000 | $0.00 | - | |
| Gregory K. Chow - Officer | Grant or award | Restricted Stock Units (RSUs) | 5,000 | $0.00 | - | |
| Jane Chung - Officer | Option exercise | Restricted Stock Units (RSUs) | 688 | $0.00 | - | |
| Jane Chung - Officer | Option exercise | Restricted Stock Units (RSUs) | 2,500 | $0.00 | - | |
| Jane Chung - Officer | Option exercise | Restricted Stock Units (RSUs) | 7,750 | $0.00 | - | |
| Jane Chung - Officer | Grant or award | Restricted Stock Units (RSUs) | 40,000 | $0.00 | - | |
| Jane Chung - Officer | Grant or award | Stock Option (right to buy) | 175,000 | $0.00 | - | |
| Jane Chung - Officer | Option exercise | Common Stock | 688 | $0.00 | - | |
| Jane Chung - Officer | Option exercise | Common Stock | 2,500 | $0.00 | - | |
| Jane Chung - Officer | Option exercise | Common Stock | 7,750 | $0.00 | - | |
| Jane Chung - Officer | Tax withholding / forfeiture | Common Stock | 1,271 | $20.47 | $26K | |
| Jane Chung - Officer | Tax withholding / forfeiture | Common Stock | 2,779 | $20.55 | $57K | |
| Jane Chung - Officer | Option exercise | Common Stock | 2,500 | $0.00 | - | |
| Jane Chung - Officer | Tax withholding / forfeiture | Common Stock | 894 | $8.02 | $7K | |
| Jane Chung - Officer | Option exercise | Restricted Stock Unit (RSU) | 2,500 | $0.00 | - | |
| Hans-Peter Gerber - Officer | Open-market purchase | Common Stock | 17,000 | $8.00 | $14K | |
| Gregory K. Chow - Officer | Open-market purchase | Common Stock | 19,750 | $8.10 | $16K | |
| Jane Chung - Officer | Open-market purchase | Common Stock | 12,500 | $8.01 | $10K | |
| Connie Matsui | Open-market purchase | Common Stock | 50,000 | $7.99 | $40K | |
| David Pauling - Officer | Open-market purchase | Common Stock | 12,504 | $7.99 | $10K | |
| Hans-Peter Gerber - Officer | Option exercise | Common Stock | 37,500 | $0.00 | - | |
| Hans-Peter Gerber - Officer | Tax withholding / forfeiture | Common Stock | 13,417 | $9.00 | $12K | |
| Hans-Peter Gerber - Officer | Option exercise | Restricted Stock Units (RSUs) | 37,500 | $0.00 | - | |
| Jane Chung - Officer | Option exercise | Common Stock | 18,750 | $0.00 | - | |
| Jane Chung - Officer | Tax withholding / forfeiture | Common Stock | 6,708 | $8.00 | $5K | |
| Jane Chung - Officer | Option exercise | Restricted Stock Unit (RSU) | 18,750 | $0.00 | - | |
| Barbara Leyman - Officer | Option exercise | Common Stock | 25,000 | $0.00 | - | |
| Barbara Leyman - Officer | Tax withholding / forfeiture | Common Stock | 8,944 | $7.80 | $7K | |
| Barbara Leyman - Officer | Option exercise | Restricted Stock Units (RSUs) | 25,000 | $0.00 | - | |
| James P. Panek | Grant or award | Stock Option (right to buy) | 50,000 | $0.00 | - | |
| Daniel H. Petree | Grant or award | Stock Option (right to buy) | 50,000 | $0.00 | - | |
| Connie Matsui | Grant or award | Stock Option (right to buy) | 50,000 | $0.00 | - | |
| Edward C. Albini - Officer | Option exercise | Common Stock | 24,438 | $0.00 | - | |
| Edward C. Albini - Officer | Option exercise | Common Stock | 11,156 | $0.00 | - | |
| Edward C. Albini - Officer | Option exercise | Common Stock | 9,125 | $0.00 | - | |
| Edward C. Albini - Officer | Tax withholding / forfeiture | Common Stock | 15,995 | $8.80 | $14K | |
| Edward C. Albini - Officer | Option exercise | Restricted Stock Unit (RSU) | 24,438 | $0.00 | - | |
| Edward C. Albini - Officer | Option exercise | Restricted Stock Unit (RSU) | 11,156 | $0.00 | - | |
| Edward C. Albini - Officer | Option exercise | Restricted Stock Unit (RSU) | 9,125 | $0.00 | - | |
| Linda A. Fitzpatrick - Officer | Option exercise | Common Stock | 9,125 | $0.00 | - | |
| Linda A. Fitzpatrick - Officer | Option exercise | Common Stock | 9,740 | $0.00 | - | |
| Linda A. Fitzpatrick - Officer | Option exercise | Common Stock | 13,140 | $0.00 | - | |
| Linda A. Fitzpatrick - Officer | Option exercise | Common Stock | 5,844 | $0.00 | - | |
| Linda A. Fitzpatrick - Officer | Tax withholding / forfeiture | Common Stock | 13,538 | $10.70 | $14K | |
| Linda A. Fitzpatrick - Officer | Option exercise | Restricted Stock Unit (RSU) | 9,125 | $0.00 | - | |
| Linda A. Fitzpatrick - Officer | Option exercise | Restricted Stock Unit (RSU) | 9,740 | $0.00 | - | |
| Linda A. Fitzpatrick - Officer | Option exercise | Restricted Stock Unit (RSU) | 13,140 | $0.00 | - | |
| Linda A. Fitzpatrick - Officer | Option exercise | Restricted Stock Unit (RSU) | 5,844 | $0.00 | - | |
| Jane Chung - Officer | Option exercise | Common Stock | 25,000 | $0.00 | - | |
| Jane Chung - Officer | Tax withholding / forfeiture | Common Stock | 8,920 | $26.90 | $24K | |
| Jane Chung - Officer | Option exercise | Restricted Stock Unit (RSU) | 25,000 | $0.00 | - |
SUTRO BIOPHARMA, INC. (STRO) had 9 insider filings in the last 90 days, with the most recent on 2026-06-09. The full record for STRO runs to 30 Form 4 filings, the earliest from 2024-12-03. InsiderAlpha tracks every Form 4, Form 144, and 8-K filing in real time.
No insider purchases of STRO were filed in the last 90 days. 5 purchases are on record for this company.
No insider sales of STRO were filed in the last 90 days.
This page tracks STRO Form 4 insider transactions, Form 144 sale notices, and 8-K material event disclosures in one timeline. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.
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Every Form 4 below links to the original document on SEC EDGAR, so the numbers on this page can be checked against the filing they came from.
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