# TOURMALINE BIO INC (TRML)

> Institutional ownership reported to the SEC as of Q3 2025, from Form 13F filings. Source: https://holderbook.com/stocks/TRML/

- Reporting holders: 136
- Reported value: $1.0B
- Held through calls: 0.2%
- Held through puts: 0.4%

A 13F reports long US equity positions only. Shorts, bonds, foreign listings and cash are not visible here, and positions are disclosed up to 45 days after the quarter ends.

## Largest holders

| Manager | Value | Shares | Share of their book | Quarters held |
|---|---|---|---|---|
| [Avoro Capital Advisors LLC](https://holderbook.com/funds/1633313-avoro-capital-advisors-llc/) | $122.2M | 2,555,555 | 1.6% | 8 |
| [QVT Financial LP](https://holderbook.com/funds/1290162-qvt-financial-lp/) | $103.1M | 2,154,653 | 7.3% | 8 |
| [BlackRock, Inc.](https://holderbook.com/funds/2012383-blackrock-inc/) | $72.6M | 1,517,777 | 0.0% | 5 |
| [TCG Crossover Management, LLC](https://holderbook.com/funds/1839948-tcg-crossover-management-llc/) | $62.7M | 1,311,783 | 3.1% | 8 |
| [Pfizer Inc](https://holderbook.com/funds/78003-pfizer-inc/) | $60.8M | 1,272,214 | 13.9% | 4 |
| [VANGUARD GROUP INC](https://holderbook.com/funds/102909-vanguard-group-inc/) | $55.8M | 1,165,607 | 0.0% | 8 |
| [FIL Ltd](https://holderbook.com/funds/318989-fil-ltd/) | $49.2M | 1,027,690 | 0.0% | 1 |
| [Magnetar Financial LLC](https://holderbook.com/funds/1352851-magnetar-financial-llc/) | $46.2M | 966,129 | 0.3% | 1 |
| [QIMING U.S. VENTURES MANAGEMENT, LLC](https://holderbook.com/funds/1909617-qiming-u-s-ventures-management-llc/) | $35.5M | 741,691 | 63.8% | 8 |
| [First Trust Capital Management L.P.](https://holderbook.com/funds/1604488-first-trust-capital-management-l-p/) | $33.3M | 695,757 | 2.1% | 1 |
| [TIG Advisors, LLC](https://holderbook.com/funds/1358253-tig-advisors-llc/) | $29.6M | 619,763 | 1.8% | 1 |
| [Vivo Capital, LLC](https://holderbook.com/funds/1674712-vivo-capital-llc/) | $28.3M | 591,882 | 2.3% | 8 |
| [ALLIANCEBERNSTEIN L.P.](https://holderbook.com/funds/1109448-alliancebernstein-l-p/) | $25.8M | 539,961 | 0.0% | 5 |
| [NEXPOINT ASSET MANAGEMENT, L.P.](https://holderbook.com/funds/1469877-nexpoint-asset-management-l-p/) | $21.8M | 455,360 | 1.9% | 1 |
| [GEODE CAPITAL MANAGEMENT, LLC](https://holderbook.com/funds/1214717-geode-capital-management-llc/) | $21.7M | 453,952 | 0.0% | 8 |
| [STATE STREET CORP](https://holderbook.com/funds/93751-state-street-corp/) | $19.9M | 415,970 | 0.0% | 7 |
| [GOLDMAN SACHS GROUP INC](https://holderbook.com/funds/886982-goldman-sachs-group-inc/) | $18.0M | 376,738 | 0.0% | 8 |
| [AQR Arbitrage LLC](https://holderbook.com/funds/1167456-aqr-arbitrage-llc/) | $17.9M | 374,785 | 0.5% | 1 |
| [ACUTA CAPITAL PARTNERS, LLC](https://holderbook.com/funds/1582844-acuta-capital-partners-llc/) | $12.8M | 268,451 | 13.3% | 8 |
| [MORGAN STANLEY](https://holderbook.com/funds/895421-morgan-stanley/) | $12.1M | 252,093 | 0.0% | 8 |
| [NAN FUNG TRINITY (HK) LTD](https://holderbook.com/funds/1781880-nan-fung-trinity-hk-ltd/) | $10.9M | 227,090 | 1.1% | 2 |
| [Versor Investments LP](https://holderbook.com/funds/1650301-versor-investments-lp/) | $10.4M | 217,221 | 1.9% | 1 |
| [ALPINE ASSOCIATES MANAGEMENT INC.](https://holderbook.com/funds/1396835-alpine-associates-management-inc/) | $9.4M | 196,177 | 0.6% | 1 |
| [MILLENNIUM MANAGEMENT LLC](https://holderbook.com/funds/1273087-millennium-management-llc/) | $9.1M | 190,625 | 0.0% | 5 |
| [GLAZER CAPITAL, LLC](https://holderbook.com/funds/1076809-glazer-capital-llc/) | $8.6M | 180,155 | 0.3% | 1 |

## Quarter by quarter

| Quarter | Holders | Reported value |
|---|---|---|
| Q3 2025 | 136 | $1.0B |
| Q2 2025 | 110 | $386.8M |
| Q1 2025 | 110 | $367.8M |
| Q4 2024 | 101 | $464.0M |
| Q3 2024 | 91 | $541.9M |
| Q2 2024 | 84 | $283.0M |
| Q1 2024 | 98 | $485.9M |
| Q4 2023 | 54 | $349.2M |