Sutro Biopharma, Inc.
STROFigures shown here come from public SEC filings. Dates beside each section show the available history.
How Sutro Biopharma, Inc. Makes Money
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Financial Summary
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SEC filings supply these figures; updates after the dates shown are not included. This page includes 10 annual periods. The latest annual period ends Dec 31, 2025. The latest insider filing shown is dated Jun 9, 2026. The latest institutional report shown is dated Mar 31, 2026; other ownership filings may exist.
Ownership
Who holds the shares, as reported in SEC ownership filings.
Reported 13F positions
Each row shows what a filer reported for one date, not a current position. The link opens that filing.
| Filer | Report date | Shares | Value | Filing |
|---|---|---|---|---|
| Parallel Advisors, LLC | 2026-03-31 | 47 | $1.17K | SEC filing |
| AJU IB Investment Co., Ltd. | 2026-03-31 | 17,500 | $436K | SEC filing |
| Fortitude Family Office, LLC | 2026-03-31 | 56 | $1.4K | SEC filing |
| EverSource Wealth Advisors, LLC | 2026-03-31 | 19 | $473 | SEC filing |
| Bogart Wealth, LLC | 2026-03-31 | 50 | $1.25K | SEC filing |
| Advisory Services Network, LLC | 2026-03-31 | 15 | $374 | SEC filing |
| Merck & Co., Inc. | 2026-03-31 | 272,351 | $6.78M | SEC filing |
| EverSource Wealth Advisors, LLC | 2025-12-31 | 31 | $359 | SEC filing |
| Essential Partners LLC | 2025-12-31 | 4 | $46 | SEC filing |
| Parallel Advisors, LLC | 2025-12-31 | 47 | $544 | SEC filing |
| Bogart Wealth, LLC | 2025-12-31 | 50 | $579 | SEC filing |
| AJU IB Investment Co., Ltd. | 2025-12-31 | 17,500 | $202K | SEC filing |
| Fortitude Family Office, LLC | 2025-12-31 | 56 | $648 | SEC filing |
| Merck & Co., Inc. | 2025-12-31 | 272,351 | $3.15M | SEC filing |
| LPL Financial LLC | 2025-09-30 | 142,883 | $124K | SEC filing |
| CITIGROUP INC | 2025-09-30 | 75,377 | $65.5K | SEC filing |
| COMERICA BANK | 2025-09-30 | 49 | $42 | SEC filing |
| BLUEFIN CAPITAL MANAGEMENT, LLC | 2025-09-30 | 34,934 | $30.3K | SEC filing |
| Tower Research Capital LLC (TRC) | 2025-09-30 | 24,017 | $20.9K | SEC filing |
| GSA CAPITAL PARTNERS LLP | 2025-09-30 | 174,843 | Not shown | SEC filing |
- Each value is checked against Sutro Biopharma, Inc.'s share prices from within about three months of its report date (insiders' Form 4 trades and the latest close).
- Value not shown for 1 row: the filed value is about 1,000 times too small for the share count at Sutro Biopharma, Inc.'s share price.
Filer report history
Two reports per filer, as filed. No change is calculated, because the data on file cannot confirm that both reports describe the same security.
- Merck & Co., Inc.: 272,351 shares reported 2025-12-31; 272,351 shares reported 2026-03-31.
- Advisory Services Network, LLC: 147 shares reported 2025-09-30; 15 shares reported 2026-03-31.
- Bogart Wealth, LLC: 50 shares reported 2025-12-31; 50 shares reported 2026-03-31.
- EverSource Wealth Advisors, LLC: 31 shares reported 2025-12-31; 19 shares reported 2026-03-31.
- Fortitude Family Office, LLC: 56 shares reported 2025-12-31; 56 shares reported 2026-03-31.
- AJU IB Investment Co., Ltd.: 17,500 shares reported 2025-12-31; 17,500 shares reported 2026-03-31.
- Parallel Advisors, LLC: 47 shares reported 2025-12-31; 47 shares reported 2026-03-31.
- Merck & Co., Inc.: 2,723,509 shares reported 2025-09-30; 272,351 shares reported 2025-12-31.
- Bogart Wealth, LLC: 500 shares reported 2025-09-30; 50 shares reported 2025-12-31.
- EverSource Wealth Advisors, LLC: 454 shares reported 2025-09-30; 31 shares reported 2025-12-31.
- AJU IB Investment Co., Ltd.: 175,000 shares reported 2025-09-30; 17,500 shares reported 2025-12-31.
- Parallel Advisors, LLC: 465 shares reported 2025-09-30; 47 shares reported 2025-12-31.
Showing the 12 most recent filer reports.
79 filers have only one report here.
Independent insiders buying near the same time
Purchases & sales (open market or private)
| Security | Code | Price | Filing | |||
|---|---|---|---|---|---|---|
| 2025-10-15 | MATSUI CONNIE · Director | Common Stock | P — Open market or private purchase | +50,000 | 0.80 | SEC filing |
| 2025-10-15 | Chung Jane · Chief Executive Officer | Common Stock | P — Open market or private purchase | +12,500 | 0.80 | SEC filing |
| 2025-10-15 | Pauling David · Chief Admin. Ofcr. & GC | Common Stock | P — Open market or private purchase | +12,504 | 0.80 | SEC filing |
| 2025-10-15 | Chow Gregory K. · CFO | Common Stock | P — Open market or private purchase | +19,750 | 0.81 | SEC filing |
| 2025-10-15 | Gerber Hans-Peter · CHIEF SCIENTIFIC OFFICER | Common Stock | P — Open market or private purchase | +17,000 | 0.80 | SEC filing |
Showing 5 of 5 rows
Grants, exercises, tax & gifts
| Security | Code | Filing | |||
|---|---|---|---|---|---|
| 2026-06-05 | Wigginton Jon Marc · Director | Stock Option (right to buy) | A — Grant, award, or other acquisition | +10,000 | SEC filing |
| 2026-06-05 | Dybbs Michael · Director | Stock Option (right to buy) | A — Grant, award, or other acquisition | +10,000 | SEC filing |
| 2026-06-05 | Jagpal Sukhi · Director | Stock Option (right to buy) | A — Grant, award, or other acquisition | +10,000 | SEC filing |
| 2026-06-05 | Lobacki Joseph M · Director | Stock Option (right to buy) | A — Grant, award, or other acquisition | +10,000 | SEC filing |
| 2026-06-05 | Hunter Heidi · Director | Stock Option (right to buy) | A — Grant, award, or other acquisition | +10,000 | SEC filing |
| 2026-06-05 | Petree Daniel H · Director | Stock Option (right to buy) | A — Grant, award, or other acquisition | +10,000 | SEC filing |
| 2026-06-05 | PANEK JAMES P · Director | Stock Option (right to buy) | A — Grant, award, or other acquisition | +10,000 | SEC filing |
| 2026-06-05 | MATSUI CONNIE · Director | Stock Option (right to buy) | A — Grant, award, or other acquisition | +10,000 | SEC filing |
Showing 8 of 30 rows
These tables describe filed transactions, not current holdings. Prices are shown as filed; a currency is added only when the filing's data names one. Amended and possible duplicate rows are left out of size comparisons and transaction groups.