ADAR1 Capital Management, LLC holds a diversified book of 290 stocks worth $1.7B as of Q1 2026 (disclosed May 18, 2026, a ~45-day 13F lag). This quarter they opened BEAM THERAPEUTICS INC and trimmed PROTAGONIST THERAPEUTICS INC. Their largest long position is ABIVAX SA at 9% of the equity book. They also disclosed $12.5M in put options (a bearish bet) and $22.2M in call options (bullish), shown separately below and excluded from the equity book.
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Use Arkolith to show ADAR1 Capital Management, LLC's latest holdings, largest changes, and filing provenance.
Top-heavy: diversified book
Share of the disclosed book in its largest positions. A higher top-5 share means a more concentrated, higher-conviction portfolio.
19% mapped to company sectors
Direct operating-company sectors from our SIC-based security master. ETF/fund and unclassified holdings stay visible separately; this is not ETF look-through exposure.
Estimated $ traded · quarter-end prices, no cost basis
Bars show each stock's share of the portfolio. Click a row for its position history.
| # | Security | Value | Shares | % Port | Last move | History |
|---|---|---|---|---|---|---|
| 1 | Abivax Sa SPONSORED ADS | $155.2M | 1.39M | 9.3% | ▲+5.8% Added · +77K sh | |
| 2 | Protagonist Therapeutics Inc COM | $104.8M | 994.1K | 6.3% | ▼−5.2% Reduced · −55K sh | |
| 3 | Roivant Sciences Ltd SHS | $91.0M | 3.29M | 5.5% | ▼−4.2% Reduced · −143K sh | |
| 4 | Immunovant Inc COM | $66.5M | 2.68M | 4.0% | ▲+8.0% Added · +198K sh | |
| 5 | State STR SPDR S&P 500 ETF T TR UNIT | $49.4M | 75.9K | 3.0% | ▲+39% Added · +21K sh | |
| 6 | Terns Pharmaceuticals Inc COM | $48.2M | 914.7K | 2.9% | ▲+69% Added · +373K sh | |
| 7 | Cytokinetics Inc COM NEW | $41.7M | 632.6K | 2.5% | ▲+17% Added · +92K sh | |
| 8 | Crinetics Pharmaceuticals In COM | $41.4M | 1.14M | 2.5% | ▲+268% Added · +830K sh | |
| 9 | Ea Series Trust ALPHA ARCH 1-3 | $39.2M | 337.1K | 2.4% | —Held | |
| 10 | Denali Therapeutics Inc COM | $35.9M | 1.87M | 2.2% | ▲36× Added · +1.8M sh | |
| 11 | Beam Therapeutics Inc COM | $34.5M | 1.45M | 2.1% | ▲New New position | |
| 12 | Zai Lab Ltd ADR | $26.8M | 1.43M | 1.6% | ▲+14% Added · +179K sh | |
| 13 | Septerna Inc COM | $26.2M | 1.09M | 1.6% | ▼−5.8% Reduced · −68K sh | |
| 14 | Vir Biotechnology Inc COM | $24.6M | 2.74M | 1.5% | ▲New New position | |
| 15 | DBV Technologies S A SPONSORED ADS | $21.2M | 1.01M | 1.3% | ▲New New position | |
| 16 | Anteris Technologies Global COM | $21.0M | 3.79M | 1.3% | ▲+206% Added · +2.6M sh | |
| 17 | Inspire Med Sys Inc COM | $20.9M | 405.2K | 1.3% | ▲27× Added · +390K sh | |
| 18 | Scholar Rock Hldg Corp COM | $20.0M | 407.3K | 1.2% | ▲+485% Added · +338K sh | |
| 19 | Rhythm Pharmaceuticals Inc COM | $18.4M | 211.4K | 1.1% | ▲+312% Added · +160K sh | |
| 20 | Spyre Therapeutics Inc COM NEW | $17.1M | 338.3K | 1.0% | ▲+894% Added · +304K sh | |
| 21 | Cytomx Therapeutics Inc. COM | $16.0M | 3.41M | 1.0% | ▼−18% Reduced · −773K sh | |
| 22 | Prothena Corp PLC SHS | $15.4M | 1.58M | 0.9% | ▲+8.5% Added · +124K sh | |
| 23 | Sanofi Sa SPONSORED ADR | $15.3M | 316.9K | 0.9% | ▲+399% Added · +253K sh | |
| 24 | Vaxcyte Inc COM | $15.1M | 259.1K | 0.9% | ▼−18% Reduced · −57K sh | |
| 25 | Monopar Therapeutics Inc COM NEW | $14.5M | 264.3K | 0.9% | ▲+13% Added · +30K sh | |
| 26 | Arbutus Biopharma Corp COM | $14.1M | 3.13M | 0.8% | ▼−42% Reduced · −2.3M sh | |
| 27 | Amylyx Pharmaceuticals Inc COM | $13.9M | 1.00M | 0.8% | ▲+12% Added · +110K sh | |
| 28 | Celldex Therapeutics Inc New COM NEW | $13.6M | 427.8K | 0.8% | ▼−34% Reduced · −219K sh | |
| 29 | Taysha Gene Therapies Inc COM SHS | $13.3M | 2.98M | 0.8% | ▲+19% Added · +484K sh | |
| 30 | Xenon Pharmaceuticals Inc COM | $13.3M | 228.9K | 0.8% | ▲+12% Added · +25K sh | |
| 31 | Sutro Biopharma Inc COM SHS | $13.1M | 524.4K | 0.8% | ▲+682% Added · +457K sh | |
| 32 | Revolution Medicines Inc COM | $13.0M | 133.9K | 0.8% | ▼−7.7% Reduced · −11K sh | |
| 33 | Enliven Therapeutics Inc COM | $12.9M | 329.5K | 0.8% | ▲11× Added · +300K sh | |
| 34 | CG Oncology Inc COM | $12.6M | 185.7K | 0.8% | ▼−28% Reduced · −72K sh | |
| 35 | SPDR Series Trust STATE STREET SPD | $12.4M | 135.6K | 0.7% | —Held | |
| 36 | Establishment Labs Hldgs Inc COM | $12.1M | 213.5K | 0.7% | ▲+25% Added · +42K sh | |
| 37 | Replimune Group Inc COM | $12.1M | 1.58M | 0.7% | ▲+28% Added · +342K sh | |
| 38 | Inventiva Sa ADS | $12.1M | 2.17M | 0.7% | ▼−20% Reduced · −535K sh | |
| 39 | Ionis Pharmaceuticals Inc COM | $12.0M | 160.3K | 0.7% | ▲+9.0% Added · +13K sh | |
| 40 | Nektar Therapeutics COM NEW | $11.6M | 161.3K | 0.7% | ▲+124% Added · +89K sh | |
| 41 | Inhibikase Therapeutics Inc COM NEW | $11.1M | 6.61M | 0.7% | ▼−18% Reduced · −1.5M sh | |
| 42 | Ars Pharmaceuticals Inc COM | $10.9M | 1.36M | 0.7% | ▲+268% Added · +992K sh | |
| 43 | Helix Acquisition Corp III USD CL A ORD SHS | $10.3M | 1.00M | 0.6% | ▲New New position | |
| 44 | Ovid Therapeutics Inc COM | $10.1M | 4.54M | 0.6% | ▲+6.0% Added · +259K sh | |
| 45 | Onkure Therapeutics Inc COM CL A | $10.1M | 2.43M | 0.6% | ▲+140% Added · +1.4M sh | |
| 46 | Regeneron Pharmaceuticals COM | $9.4M | 12.2K | 0.6% | ▲+0.8% Added · +103 sh | |
| 47 | Moonlake Immunotherapeutics CLASS A ORD | $8.5M | 457.1K | 0.5% | ▲Added Added · +457K sh | |
| 48 | Lexeo Therapeutics Inc COM | $8.4M | 1.47M | 0.5% | ▲+5.3% Added · +74K sh | |
| 49 | Opus Genetics Inc COM | $8.4M | 1.85M | 0.5% | ▲46× Added · +1.8M sh | |
| 50 | Teva Pharmaceutical Inds Ltd SPONSORED ADS | $8.1M | 268.4K | 0.5% | ▲+14% Added · +32K sh |
Put / call positions from the 13F — totals include every disclosed option leg
| Type | Underlying | Notional value | Underlying shares |
|---|---|---|---|
| CALL · bullish | TERNS PHARMACEUTICALS INC | $10.5M | 200K |
| PUT · bearish | ISHARES RUSSELL 2000 ETFIWM | $6.8M | 28K |
| CALL · bullish | ABIVAX SA | $4.9M | 44K |
| PUT · bearish | LIQUIDIA CORPORATION | $3.8M | 100K |
| PUT · bearish | SPDR SERIES TRUST | $1.9M | 15K |
| CALL · bullish | UNIQURE NV | $1.6M | 100K |
| CALL · bullish | KARYOPHARM THERAPEUTICS INC | $1.1M | 205K |
| CALL · bullish | KEEN VISION ACQUISITION CORPKVAC | $900K | 75K |
| CALL · bullish | REPLIMUNE GROUP INC | $765K | 100K |
| CALL · bullish | FRACTYL HEALTH INCGUTS | $654K | 1.4M |
| CALL · bullish | NOVO-NORDISK A/S-SPONS ADRNVO | $478K | 13K |
| CALL · bullish | ULTRAGENYX PHARMACEUTICAL INRARE | $419K | 20K |
| CALL · bullish | MOONLAKE IMMUNOTHERAPEUTICS | $373K | 20K |
| CALL · bullish | CORBUS PHARMACEUTICALS HLDGS | $329K | 35K |
| CALL · bullish | SOLIDION TECHNOLOGY INC | $85K | 14K |
| PUT · bearish | QUINCE THERAPEUTICS INC | $5K | 50K |
13F filers disclose option positions at the market value of the underlying the contracts reference, not the premium paid. A put is a bearish bet (it gains if the stock falls); a call is bullish. “Underlying shares” is the share count the contracts control, not a share holding. These legs are excluded from the equity book, weighting, concentration and sector figures above.
As-of date vs the date the SEC received each filing
| Quarter | As of | Filed | Positions | Value | Form |
|---|---|---|---|---|---|
| Q1 2026 | Mar 31, 2026 | May 18, 2026 | 311 | $1.7B | 13F-HR |
| Q4 2025 | Dec 31, 2025 | Feb 18, 2026 | 270 | $1.4B | 13F-HR/A |
| Q3 2025 | Sep 30, 2025 | Nov 14, 2025 | 220 | $1.1B | 13F-HR |
| Q2 2025 | Jun 30, 2025 | Aug 14, 2025 | 210 | $652.1M | 13F-HR |
| Q1 2025 | Mar 31, 2025 | May 15, 2025 | 202 | $538.7M | 13F-HR |
| Q4 2024 | Dec 31, 2024 | Feb 13, 2025 | 214 | $500.4M | 13F-HR |
| Q3 2024 | Sep 30, 2024 | Nov 14, 2024 | 278 | $614.9M | 13F-HR |
| Q2 2024 | Jun 30, 2024 | Aug 13, 2024 | 266 | $529.7M | 13F-HR |
| Q1 2024 | Mar 31, 2024 | May 15, 2024 | 261 | $440.8M | 13F-HR |
| Q4 2023 | Dec 31, 2023 | Feb 14, 2024 | 170 | $279.8M | 13F-HR |
Holdings from SEC EDGAR 13F-HR filings, updated quarterly ~45 days after quarter-end. Public domain. The book and weighting are long equity only; disclosed put/call options are listed separately and excluded from those totals. The performance line is a simulation of the disclosed long book, not an audited return.