Pauling David, Chief Administrative Officer and General Counsel of Sutro Biopharma Inc. ($STRO), made one open market purchase of shares in the last year, totaling nearly $10,000. His most recent buy occurred on October 15, 2025. This activity ranks him 4,318th among nearly 5,000 insiders by purchase value, well below the average of $1.46 million across about 3.3 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 4, 2026 | SUTRO BIOPHARMA, INC. | $STRO | Pauling David | Chief Admin. Ofcr. & GC | F | Common Stock | 277 | $21.31 | 9,748.0000 | 85,135,290 | 2.76% | 0.00% |
| March 4, 2026 | SUTRO BIOPHARMA, INC. | $STRO | Pauling David | Chief Admin. Ofcr. & GC | M | Common Stock | 675 | $0.00 | 10,025.0000 | 85,135,290 | 7.22% | 0.00% |
| March 4, 2026 | SUTRO BIOPHARMA, INC. | $STRO | Pauling David | Chief Admin. Ofcr. & GC | M | Restricted Stock Units (RSUs) | 675 | $0.00 | 0.0000 | 85,135,290 | 100.00% | 0.00% |
| March 1, 2026 | SUTRO BIOPHARMA, INC. | $STRO | Pauling David | Chief Admin. Ofcr. & GC | F | Common Stock | 551 | $20.47 | 7,964.0000 | 85,135,290 | 6.47% | 0.00% |
| March 2, 2026 | SUTRO BIOPHARMA, INC. | $STRO | Pauling David | Chief Admin. Ofcr. & GC | M | Common Stock | 2356 | $0.00 | 10,320.0000 | 85,135,290 | 29.58% | 0.00% |
| March 2, 2026 | SUTRO BIOPHARMA, INC. | $STRO | Pauling David | Chief Admin. Ofcr. & GC | F | Common Stock | 970 | $20.55 | 9,350.0000 | 85,135,290 | 9.40% | 0.00% |
| March 1, 2026 | SUTRO BIOPHARMA, INC. | $STRO | Pauling David | Chief Admin. Ofcr. & GC | M | Common Stock | 500 | $0.00 | 7,673.0000 | 85,135,290 | 6.97% | 0.00% |
| March 1, 2026 | SUTRO BIOPHARMA, INC. | $STRO | Pauling David | Chief Admin. Ofcr. & GC | M | Common Stock | 842 | $0.00 | 8,515.0000 | 85,135,290 | 10.97% | 0.00% |
| March 1, 2026 | SUTRO BIOPHARMA, INC. | $STRO | Pauling David | Chief Admin. Ofcr. & GC | M | Restricted Stock Units (RSUs) | 842 | $0.00 | 1,686.0000 | 85,135,290 | 33.31% | 0.00% |
| March 2, 2026 | SUTRO BIOPHARMA, INC. | $STRO | Pauling David | Chief Admin. Ofcr. & GC | M | Restricted Stock Units (RSUs) | 2356 | $0.00 | 7,069.0000 | 85,135,290 | 25.00% | 0.00% |
| March 2, 2026 | SUTRO BIOPHARMA, INC. | $STRO | Pauling David | Chief Admin. Ofcr. & GC | A | Restricted Stock Units (RSUs) | 4200 | $0.00 | 4,200.0000 | 85,135,290 | 9999.99% | 0.00% |
| March 2, 2026 | SUTRO BIOPHARMA, INC. | $STRO | Pauling David | Chief Admin. Ofcr. & GC | A | Stock Option (right to buy) | 33600 | $0.00 | 33,600.0000 | 85,135,290 | 9999.99% | 0.04% |
| March 1, 2026 | SUTRO BIOPHARMA, INC. | $STRO | Pauling David | Chief Admin. Ofcr. & GC | M | Restricted Stock Units (RSUs) | 500 | $0.00 | 500.0000 | 85,135,290 | 50.00% | 0.00% |
| Dec. 23, 2025 | SUTRO BIOPHARMA, INC. | $STRO | Pauling David | Chief Admin. Ofcr. & GC | A | Stock Option (right to buy) | 7200 | $0.00 | 7,200.0000 | 85,135,290 | 9999.99% | 0.01% |
| Oct. 15, 2025 | SUTRO BIOPHARMA, INC. | $STRO | Pauling David | Chief Admin. Ofcr. & GC | P | Common Stock | 12504 | $0.80 | 71,737.0000 | 83,775,336 | 21.11% | 0.01% |
| April 4, 2025 | SUTRO BIOPHARMA, INC. | $STRO | Pauling David | Chief Admin. Ofcr. & GC | A | Stock Option (Right to Buy) | 101500 | $0.00 | 101,500.0000 | 83,775,336 | 9999.99% | 0.12% |
| April 4, 2025 | SUTRO BIOPHARMA, INC. | $STRO | Pauling David | Chief Admin. Ofcr. & GC | A | Restricted Stock Units (RSUs) | 94250 | $0.00 | 94,250.0000 | 83,775,336 | 9999.99% | 0.11% |