Who owns Instil Bio (TIL)
Which tracked institutional funds hold TIL, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See TIL company fundamentals →
Ownership as of the 2026-Q2 13F filings (latest filed 2026-09-22). 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
The tracked-fund tape on TIL is one-sided between 2026-Q1 and 2026-Q2: 1 added or opened and 4 trimmed or exited — on balance reducing.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
TIL’s largest tracked holder by dollar value, Curative Ventures V LLC, sizes it at 100.0% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 100.0pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in TIL divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2026-Q1 and 2026-Q2, across 26 tracked filers holding TIL, 10 increased or opened the position and 19 reduced or closed it; over the same quarter, there were no open-market insider Form 4s.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in TIL between the 2026-Q1 and 2026-Q2 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
Full exits 1
- CPMG Inc$3M
Largest adds
- UBS Group AG$1M
Largest trims
- Curative Ventures V LLC$1M
- Kalehua Capital Management LLC$386K
- BML Capital Management, LLC$355K
Institutional holders
One row per tracked fund, largest reported value first. “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding. Rows marked stale are from an earlier filing than the security’s latest quarter — that fund is absent from the newest snapshot (position exited, or reported under a different name).
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| Curative Ventures V LLC | 1,899,004 | $15M | 28.4% | 2026-Q2 |
| BML Capital Management, LLC | 645,600 | $5M | 9.7% | 2026-Q2 |
| Vivo Capital, LLC | 292,743 | $2M | 4.4% | 2026-Q2 |
| UBS Group AG added | 177,423 | $1M | 2.7% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC trimmed | 163,738 | $1M | 2.5% | 2026-Q2 |
| MILLENNIUM MANAGEMENT LLC added | 134,575 | $1M | 2.0% | 2026-Q2 |
| Kalehua Capital Management LLC trimmed | 99,600 | $766K | 1.5% | 2026-Q2 |
| BlackRock, Inc. added | 55,504 | $427K | 0.8% | 2026-Q2 |
| RENAISSANCE TECHNOLOGIES LLC trimmed | 50,300 | $387K | 0.8% | 2026-Q2 |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. | 50,000 | $385K | 0.7% | 2026-Q2 |
| JACOBS LEVY EQUITY MANAGEMENT, INC new | 43,051 | $331K | 0.6% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC trimmed | 42,234 | $325K | 0.6% | 2026-Q2 |
| LPL Financial LLC added | 32,075 | $247K | 0.5% | 2026-Q2 |
| CITADEL ADVISORS LLC trimmed | 30,639 | $236K | 0.5% | 2026-Q2 |
| VANGUARD FIDUCIARY TRUST CO added | 22,773 | $175K | 0.3% | 2026-Q2 |
| STATE STREET CORP | 17,595 | $135K | 0.3% | 2026-Q2 |
| Americana Partners, LLC | 16,176 | $124K | 0.2% | 2026-Q2 |
| DIMENSIONAL FUND ADVISORS LP trimmed | 15,761 | $121K | 0.2% | 2026-Q2 |
| MORGAN STANLEY trimmed | 11,934 | $92K | 0.2% | 2026-Q2 |
| Vanguard Global Advisers, LLC | 1,470 | $11K | 0.0% | 2026-Q2 |
| NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO new | 550 | $4K | 0.0% | 2026-Q2 |
| INTERNATIONAL ASSETS INVESTMENT MANAGEMENT, LLC new | 125 | $961 | 0.0% | 2026-Q2 |
| CITIGROUP INC added | 88 | $677 | 0.0% | 2026-Q2 |
| Tower Research Capital LLC (TRC) trimmed | 32 | $246 | 0.0% | 2026-Q2 |
| BARCLAYS PLC trimmed | 29 | $223 | 0.0% | 2026-Q2 |
| BNP PARIBAS FINANCIAL MARKETS | 7 | $54 | 0.0% | 2026-Q2 |
| CPMG Inc | 410,922 | $3M | 6.6% | 2026-Q1 stale (1 quarter behind) |
| XTX Topco Ltd added | 26,242 | $216K | 0.4% | 2026-Q1 stale (1 quarter behind) |
| JANE STREET GROUP, LLC trimmed | 11,517 | $95K | 0.2% | 2026-Q1 stale (1 quarter behind) |
| PRELUDE CAPITAL MANAGEMENT, LLC new | 10,300 | $85K | 0.2% | 2026-Q1 stale (1 quarter behind) |
| Vazirani Asset Management LLC new | 10,000 | $82K | 0.2% | 2026-Q1 stale (1 quarter behind) |
| FNY Investment Advisers, LLC new | 10,000 | $82K | 0.2% | 2026-Q1 stale (1 quarter behind) |
| BOKF, NA | 454 | $4K | 0.0% | 2026-Q1 stale (1 quarter behind) |
| ROYAL BANK OF CANADA trimmed | 84 | $1K | 0.0% | 2026-Q1 stale (1 quarter behind) |
| RHUMBLINE ADVISERS | 114 | $939 | 0.0% | 2026-Q1 stale (1 quarter behind) |
| Farther Finance Advisors, LLC | 70 | $562 | 0.0% | 2026-Q1 stale (1 quarter behind) |
| Fortitude Family Office, LLC new | 64 | $527 | 0.0% | 2026-Q1 stale (1 quarter behind) |
| Siren, L.L.C. | 203,933 | $2M | 4.4% | 2025-Q4 stale (2 quarters behind) |
| VANGUARD GROUP INC added | 191,060 | $2M | 4.1% | 2025-Q4 stale (2 quarters behind) |
| AlphaQuest LLC added | 37,279 | $410K | 0.8% | 2025-Q4 stale (2 quarters behind) |
| Quadrature Capital Ltd new | 19,198 | $211K | 0.4% | 2025-Q4 stale (2 quarters behind) |
| EQ WEALTH ADVISORS, LLC | 40 | $440 | 0.0% | 2025-Q4 stale (2 quarters behind) |
| Frazier Financial Advisors, LLC | 15 | $165 | 0.0% | 2025-Q4 stale (2 quarters behind) |
| BANK OF AMERICA CORP /DE/ trimmed | 4 | $44 | 0.0% | 2025-Q4 stale (2 quarters behind) |
| SECTORAL ASSET MANAGEMENT INC added | 161,380 | $3M | 5.6% | 2025-Q3 stale (3 quarters behind) |
| Boxer Capital Management, LLC trimmed | 60,700 | $1M | 2.1% | 2025-Q3 stale (3 quarters behind) |
| MACQUARIE GROUP LTD | 50,000 | $893K | 1.7% | 2025-Q3 stale (3 quarters behind) |
| MARSHALL WACE, LLP added | 44,878 | $802K | 1.6% | 2025-Q3 stale (3 quarters behind) |
| NORTHERN TRUST CORP trimmed | 15,684 | $280K | 0.5% | 2025-Q3 stale (3 quarters behind) |
| FMR LLC | 5 | $94 | 0.0% | 2025-Q3 stale (3 quarters behind) |
| SBI Securities Co., Ltd. new | 1 | $18 | 0.0% | 2025-Q3 stale (3 quarters behind) |
| GOLDMAN SACHS GROUP INC added | 163,261 | $3M | 6.6% | 2025-Q2 stale (4 quarters behind) |
| BALYASNY ASSET MANAGEMENT L.P. trimmed | 88,796 | $2M | 3.6% | 2025-Q2 stale (4 quarters behind) |
| Assenagon Asset Management S.A. added | 57,497 | $1M | 2.3% | 2025-Q2 stale (4 quarters behind) |
| Trexquant Investment LP new | 17,369 | $362K | 0.7% | 2025-Q2 stale (4 quarters behind) |
| Exome Asset Management LLC new | 16,200 | $337K | 0.7% | 2025-Q2 stale (4 quarters behind) |
| GF FUND MANAGEMENT CO. LTD. new | 3,000 | $62K | 0.1% | 2025-Q2 stale (4 quarters behind) |
| RAYMOND JAMES FINANCIAL INC new | 1,433 | $30K | 0.1% | 2025-Q2 stale (4 quarters behind) |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | 0 | — | 0.0% | 2025-Q2 stale (4 quarters behind) |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.