§ BIOTECHNOLOGY
USD · BiotechnologySTRO
SUTRO BIOPHARMA INC
USDSector · Biotechnology
§ 01 · PRICE
Price action
1D5D1M6MYTD1YMAX
§ 03 · SIGNAL STACK · WHAT THE INPUTS SAY
13F FLOW
66 increased/new, 22 decreased/exited (13F)
AC 13F Analysis
§ 05 · WHO OWNS IT
Top institutional holders
| Fund | Shares | % port | Δ Q/Q |
|---|---|---|---|
| BVF INC/IL | 1.3M | 1.0% | n/a |
| Affinity Asset Advisors, LLC | 1.1M | 1.4% | +43% |
| SAMSARA BIOCAPITAL, LLC | 1.1M | 2.6% | +420% |
| Kynam Capital Management, LP | 873K | 1.3% | +82% |
| ORBIMED ADVISORS LLC | 801K | 0.4% | n/a |
| VANGUARD CAPITAL MANAGEMENT LLC | 720K | n/a | n/a |
◇ AC INTELLIGENCE
Top institutional owners for STRO as of the most recent 13F reporting period (Q1 2026 · Period ended Mar 31). Δ Q/Q reflects share-count change vs. the prior filing — positive green means adding, negative red means trimming. Cross-reference with the ownership-mix bars below to see which strategy cohort is driving the flow.
§ 06 · WHO OWNS IT · BY STRATEGY
OTHER86.6% · 54 holders
TACTICAL / MACRO5.1% · 4 holders
DEALER / BANK3.4% · 12 holders
PASSIVE / INDEX2.6% · 4 holders
SYSTEMATIC / QUANT2.0% · 2 holders
QUALITY / COMPOUNDER0.2% · 2 holders
INCOME / DEFENSIVE0.0% · 1 holder
◇ AC INTELLIGENCE
Ownership mix by behavioral cohort. Top bars indicate which style of capital dominates the float — passive indexing, quality compounders, dealer/bank, systematic quant, etc. Big quality-compounder share means concentrated active conviction; heavy passive share means flows are dictated by index rebalances, not fundamentals.
§ 07 · INSIDER ACTIVITY · LAST 180 DAYS
NO INSIDER FILINGS
◇ AC INTELLIGENCE
No Form 4 filings on record for STRO in the last 180 days.