Gerber Hans-Peter, Chief Scientific Officer at Sutro Biopharma Inc. ($STRO), bought shares on the open market once in the last year for a total of $13,607. His most recent purchase occurred on October 15, 2025. This activity ranks him 4,103rd out of 4,983 insiders by purchase value, well below the average of $1.46 million across 3.29 transactions per insider. He reported no open market sales in the period.
| Transaction Date | Company | Ticker | Insider Name | Title | Transaction Type | Security | Shares | Price | Shares Owned Following | Total Shares Outstanding | % of Owned | % of Outstanding |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| March 2, 2026 | SUTRO BIOPHARMA, INC. | $STRO | Gerber Hans-Peter | CHIEF SCIENTIFIC OFFICER | A | Stock Option (right to buy) | 40000 | $0.00 | 40,000.0000 | 85,135,290 | 9999.99% | 0.05% |
| March 1, 2026 | SUTRO BIOPHARMA, INC. | $STRO | Gerber Hans-Peter | CHIEF SCIENTIFIC OFFICER | F | Common Stock | 463 | $20.47 | 7,845.0000 | 85,135,290 | 5.57% | 0.00% |
| March 1, 2026 | SUTRO BIOPHARMA, INC. | $STRO | Gerber Hans-Peter | CHIEF SCIENTIFIC OFFICER | M | Common Stock | 1125 | $0.00 | 8,308.0000 | 85,135,290 | 15.66% | 0.00% |
| March 2, 2026 | SUTRO BIOPHARMA, INC. | $STRO | Gerber Hans-Peter | CHIEF SCIENTIFIC OFFICER | A | Restricted Stock Units (RSUs) | 5000 | $0.00 | 5,000.0000 | 85,135,290 | 9999.99% | 0.01% |
| March 2, 2026 | SUTRO BIOPHARMA, INC. | $STRO | Gerber Hans-Peter | CHIEF SCIENTIFIC OFFICER | M | Restricted Stock Units (RSUs) | 2843 | $0.00 | 8,532.0000 | 85,135,290 | 24.99% | 0.00% |
| March 1, 2026 | SUTRO BIOPHARMA, INC. | $STRO | Gerber Hans-Peter | CHIEF SCIENTIFIC OFFICER | M | Restricted Stock Units (RSUs) | 1125 | $0.00 | 2,250.0000 | 85,135,290 | 33.33% | 0.00% |
| March 2, 2026 | SUTRO BIOPHARMA, INC. | $STRO | Gerber Hans-Peter | CHIEF SCIENTIFIC OFFICER | F | Common Stock | 1170 | $20.55 | 9,518.0000 | 85,135,290 | 10.95% | 0.00% |
| March 2, 2026 | SUTRO BIOPHARMA, INC. | $STRO | Gerber Hans-Peter | CHIEF SCIENTIFIC OFFICER | M | Common Stock | 2843 | $0.00 | 10,688.0000 | 85,135,290 | 36.24% | 0.00% |
| Dec. 23, 2025 | SUTRO BIOPHARMA, INC. | $STRO | Gerber Hans-Peter | CHIEF SCIENTIFIC OFFICER | A | Stock Option (right to buy) | 7925 | $0.00 | 7,925.0000 | 85,135,290 | 9999.99% | 0.01% |
| Oct. 15, 2025 | SUTRO BIOPHARMA, INC. | $STRO | Gerber Hans-Peter | CHIEF SCIENTIFIC OFFICER | P | Common Stock | 17000 | $0.80 | 71,832.0000 | 83,775,336 | 31.00% | 0.02% |
| Sept. 18, 2025 | SUTRO BIOPHARMA, INC. | $STRO | Gerber Hans-Peter | CHIEF SCIENTIFIC OFFICER | F | Common Stock | 13417 | $0.90 | 54,832.0000 | 83,775,336 | 19.66% | 0.02% |
| Sept. 18, 2025 | SUTRO BIOPHARMA, INC. | $STRO | Gerber Hans-Peter | CHIEF SCIENTIFIC OFFICER | M | Common Stock | 37500 | $0.00 | 68,249.0000 | 83,775,336 | 121.96% | 0.04% |
| Sept. 18, 2025 | SUTRO BIOPHARMA, INC. | $STRO | Gerber Hans-Peter | CHIEF SCIENTIFIC OFFICER | M | Restricted Stock Units (RSUs) | 37500 | $0.00 | 75,000.0000 | 83,775,336 | 33.33% | 0.04% |
| April 4, 2025 | SUTRO BIOPHARMA, INC. | $STRO | Gerber Hans-Peter | CHIEF SCIENTIFIC OFFICER | A | Stock Option (Right to Buy) | 122500 | $0.00 | 122,500.0000 | 83,775,336 | 9999.99% | 0.15% |
| April 4, 2025 | SUTRO BIOPHARMA, INC. | $STRO | Gerber Hans-Peter | CHIEF SCIENTIFIC OFFICER | A | Restricted Stock Units (RSUs) | 113750 | $0.00 | 113,750.0000 | 83,775,336 | 9999.99% | 0.14% |
| March 1, 2025 | SUTRO BIOPHARMA, INC. | $STRO | Gerber Hans-Peter | CHIEF SCIENTIFIC OFFICER | M | Common Stock | 11250 | $0.00 | 35,370.0000 | 0 | 46.64% | 0.00% |
| March 1, 2025 | SUTRO BIOPHARMA, INC. | $STRO | Gerber Hans-Peter | CHIEF SCIENTIFIC OFFICER | M | Restricted Stock Units (RSUs) | 11250 | $0.00 | 33,750.0000 | 0 | 25.00% | 0.00% |
| March 1, 2025 | SUTRO BIOPHARMA, INC. | $STRO | Gerber Hans-Peter | CHIEF SCIENTIFIC OFFICER | F | Common Stock | 4621 | $1.59 | 30,749.0000 | 0 | 13.06% | 0.00% |
| Sept. 18, 2024 | SUTRO BIOPHARMA, INC. | $STRO | Gerber Hans-Peter | CHIEF SCIENTIFIC OFFICER | M | Restricted Stock Units (RSUs) | 37500 | $0.00 | 112,500.0000 | 0 | 25.00% | 0.00% |
| Sept. 18, 2024 | SUTRO BIOPHARMA, INC. | $STRO | Gerber Hans-Peter | CHIEF SCIENTIFIC OFFICER | F | Common Stock | 13380 | $3.95 | 24,120.0000 | 0 | 35.68% | 0.00% |
| Sept. 18, 2024 | SUTRO BIOPHARMA, INC. | $STRO | Gerber Hans-Peter | CHIEF SCIENTIFIC OFFICER | M | Common Stock | 37500 | $0.00 | 37,500.0000 | 0 | 9999.99% | 0.00% |
| March 5, 2024 | SUTRO BIOPHARMA, INC. | $STRO | Gerber Hans-Peter | CHIEF SCIENTIFIC OFFICER | A | Restricted Stock Units (RSUs) | 45000 | $0.00 | 45,000.0000 | 0 | 9999.99% | 0.00% |
| March 5, 2024 | SUTRO BIOPHARMA, INC. | $STRO | Gerber Hans-Peter | CHIEF SCIENTIFIC OFFICER | A | Stock Option (Right to Buy Common Stock) | 60000 | $0.00 | 60,000.0000 | 0 | 9999.99% | 0.00% |