← The Wire
STRONasdaq
SUTRO BIOPHARMA, INC.
Biological Products, (No Diagnostic Substances) · CIK 1382101
Developing site-specific antibody drug conjugates for oncology using proprietary cell-free protein synthesis platforms
$477M
Market cap
$33.35
Last close
+9.3%
1D
+5.7%
5D
465K
Volume
Price · last 39 sessions-13.1%
May 4L $24.43 · H $40.91Jun 29
167
Total filings
Jun 8, 2026
Last filing
12/31
Fiscal year end
424B5424B5Feb 10, 2026424B5424B5Apr 2, 2024424B5424B5Feb 9, 2024424B5424B5Dec 9, 2020424B5424B5Dec 7, 2020424B5424B5May 12, 2020424B5424B5May 11, 2020424B5424B5Oct 11, 2019
Insider Activity
◆ Cluster Buy · 5 insidersIn the 90 days to Oct 15, 2025: 5 insiders bought $90K.
| Date | Insider | Action | Shares | Price | Value |
|---|---|---|---|---|---|
| Oct 15, 2025 | Matsui ConnieDirector | Buy | 50,000 | $0.80 | $40K |
| Oct 15, 2025 | Chow Gregory K.CFO | Buy | 19,750 | $0.81 | $16K |
| Oct 15, 2025 | Gerber Hans-PeterCHIEF SCIENTIFIC OFFICER | Buy | 17,000 | $0.80 | $14K |
| Oct 15, 2025 | Pauling DavidChief Admin. Ofcr. & GC | Buy | 12,504 | $0.80 | $10K |
| Oct 15, 2025 | Chung JaneChief Executive Officer | Buy | 12,500 | $0.80 | $10K |
Open-market buys & sells (Form 4, transaction codes P/S). Source: SEC structured insider data.
Similar companies
Comparable business profile · signals at a glance