§ BIOTECHNOLOGY
USD · BiotechnologyANAB
ANAPTYSBIO INC
USDSector · BiotechnologyBeta · 0.87
§ 01 · PRICE
Price action
1D5D1M6MYTD1YMAX
§ 03 · SIGNAL STACK · WHAT THE INPUTS SAY
13F FLOW
122 increased/new, 67 decreased/exited (13F)
AC 13F Analysis
§ 04 · FUNDAMENTALS · THE BOOKS
| P/B | 36.07 | EPS (TTM) | -0.88 |
§ 05 · WHO OWNS IT
Top institutional holders
| Fund | Shares | % port | Δ Q/Q |
|---|---|---|---|
| EcoR1 Capital, LLC | 7.9M | 18.5% | ±0% |
| BlackRock | 1.7M | 0.0% | −3% |
| TANG CAPITAL MANAGEMENT LLC | 1.3M | 3.7% | −0% |
| Morgan Stanley | 994K | 0.0% | n/a |
| State Street | 992K | 0.0% | −6% |
| Affinity Asset Advisors, LLC | 940K | 2.7% | +111% |
◇ AC INTELLIGENCE
Top institutional owners for ANAB 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
OTHER66.7% · 138 holders
DEALER / BANK12.4% · 20 holders
PASSIVE / INDEX9.0% · 9 holders
QUALITY / COMPOUNDER5.3% · 13 holders
SYSTEMATIC / QUANT3.5% · 9 holders
TACTICAL / MACRO2.5% · 4 holders
ACTIVIST2.0% · 1 holder
INCOME / DEFENSIVE1.0% · 12 holders
GROWTH / MOMENTUM0.1% · 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 ANAB in the last 180 days.
§ 08 · COVERAGE · OUR RECENT NOTES
No notes mention ANAB yet.