SUTRO BIOPHARMA, INC. (STRO)
Data as of , from SEC Form 4 filings.
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- Hans-Peter Gerber - OfficerOpen-market purchase$14K
- Gregory K. Chow - OfficerOpen-market purchase$16K
About SUTRO BIOPHARMA, INC. (STRO)
The SEC lists SUTRO BIOPHARMA, INC. under CIK 0001382101, in biological products (no diagnostic substances). It is grouped with Health Care companies on this site.
STRO Form 4 activity by transaction type, last 90 days
| Form 4 transaction type | Transactions | Shares | Total value |
|---|---|---|---|
| Option exercise | 2 | 7,500 | |
| Tax withholding / forfeiture | 1 | 1,345 |
Dollar totals cover purchases and sales only (codes P and S). Grants, option exercises, gifts and tax withholding are counted in shares, because none of them is a trade at a market price.
STRO insider transactions (Form 4)
8531 Form 4 filings on record, the earliest from Dec 3, 2024, newest first. Filing history page 1 of 2.
| Date | Insider | Transaction | Security | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Hans-Peter Gerber - Officer | Option exercise | Common Stock | 3,750 | $0.00 | - | |
| Hans-Peter Gerber - Officer | Tax withholding / forfeiture | Common Stock | 1,345 footnote F2 | $15.34 | $21K | |
| Hans-Peter Gerber - Officer | Option exercise | Restricted Stock Units (RSUs) | 3,750 | $0.00 | - | |
| ||||||
| 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 footnote F1 | $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 footnote F1 | $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 footnote F1 | $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 footnote F1 | $20.47 | $11K | |
| David Pauling - Officer | Tax withholding / forfeiture | Common Stock | 970 footnote F1 | $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 footnote F1 | $20.47 | $9K | |
| Hans-Peter Gerber - Officer | Tax withholding / forfeiture | Common Stock | 1,170 footnote F1 | $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 footnote F1 | $20.47 | $26K | |
| Jane Chung - Officer | Tax withholding / forfeiture | Common Stock | 2,779 footnote F1 | $20.55 | $57K | |
| ||||||
| Jane Chung - Officer | Option exercise | Common Stock | 2,500 | $0.00 | - | |
| Jane Chung - Officer | Tax withholding / forfeiture | Common Stock | 894 footnote F1 | $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 | $0.80 footnote F1 | $14K | |
| ||||||
| Gregory K. Chow - Officer | Open-market purchase | Common Stock | 19,750 | $0.81 footnote F1 | $16K | |
| ||||||
| Jane Chung - Officer | Open-market purchase | Common Stock | 12,500 | $0.80 | $10K | |
| Connie Matsui | Open-market purchase | Common Stock | 50,000 | $0.80 | $40K | |
| David Pauling - Officer | Open-market purchase | Common Stock | 12,504 | $0.80 | $10K | |
| Hans-Peter Gerber - Officer | Option exercise | Common Stock | 37,500 | $0.00 | - | |
| Hans-Peter Gerber - Officer | Tax withholding / forfeiture | Common Stock | 13,417 | $0.90 | $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 | $0.80 | $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 | $0.78 | $7K | |
| Barbara Leyman - Officer | Option exercise | Restricted Stock Units (RSUs) | 25,000 | $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 | - | |
| James P. Panek | 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 | $0.88 | $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 | $1.07 | $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 | - | |
Item 2.02, 7.01, 9.01
Item 5.07
Item 2.02, 9.01
Item 1.02, 2.02, 9.01
STRO insider trading FAQ
What is the latest insider trade for STRO?
SUTRO BIOPHARMA, INC. (STRO) had 1 insider filing in the last 90 days, with the most recent on 2026-09-22. The full record for STRO runs to 31 Form 4 filings, the earliest from 2024-12-03. InsiderAlpha adds new Form 4, Form 144 and 8-K filings as they arrive from SEC EDGAR.
How many insiders are buying STRO stock?
No insider purchases of STRO were filed in the last 90 days. 5 purchases are on record for this company.
How many insiders are selling STRO stock?
No insider sales of STRO were filed in the last 90 days.
Where can I see STRO SEC filings (Form 4, 10-K, 10-Q, 8-K)?
This page collects STRO Form 4 insider transactions, Form 144 sale notices and 8-K filings in one place. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.
More Health Care companies with insider activity
Recent insider filings
10The EDGAR links open each original Form 4, so you can check any number on this page against the filing it came from.
- - Hans-Peter Gerber view on EDGAR
- - Jon Marc Wigginton view on EDGAR
- - Daniel H. Petree view on EDGAR
- - James P. Panek view on EDGAR
- - Joseph M. Lobacki view on EDGAR
- - Sukhi Jagpal view on EDGAR
- - Heidi Hunter view on EDGAR
- - Michael Dybbs view on EDGAR
- - Connie Matsui view on EDGAR
Related companies with recent insider activity
Learn more
- What the Form 4 transaction codes mean
- Grants, option exercises, gifts and tax withholding are not trades on the market. The codes say which is which.
- Insider activity in Health Care
- Where STRO's peers are being bought and sold.
- Every recent Form 4
- The market-wide feed, updated as filings arrive from SEC EDGAR.
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