Instil Bio, Inc.
Instil Bio, Inc. (TIL) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · TIL · as of Sep 30, 2025
Ownership Breakdown
33
Institutional Holders
▼ 4 vs Q2
$47.42M
Total Inst. Value
▼ $9.89M vs Q2
6.78M
Shares Outstanding
freeFloat 53.40%
2.66M
13F Shares Held
▼ 95,997 vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
TIL largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
BML CAPITAL MANAGEMENT, LLC biological products, (no diagnostic substances) | 645.6K | 9.79% | 9.79% | $11.53B | Nov 10, 2025 | ▲ 110.7K |
CPMG INC biological products, (no diagnostic substances) | 410.9K | 6.23% | 6.23% | $7.34B | Nov 14, 2025 | — held |
VIVO CAPITAL, LLC biological products, (no diagnostic substances) | 292.7K | 4.44% | 4.44% | $5.23B | Nov 14, 2025 | — held |
SIREN, L.L.C. biological products, (no diagnostic substances) | 203.9K | 3.09% | 3.09% | $3.64B | Nov 13, 2025 | — held |
MILLENNIUM MANAGEMENT LLC biological products, (no diagnostic substances) | 196.7K | 2.98% | 2.98% | $3.51B | Nov 14, 2025 | ▲ 88.6K |
VANGUARD GROUP INC biological products, (no diagnostic substances) | 167.8K | 2.54% | 2.54% | $3.00B | Nov 7, 2025 | ▼ 288 |
SECTORAL ASSET MANAGEMENT INC biological products, (no diagnostic substances) | 161.4K | 2.45% | 2.45% | $2.88B | Nov 14, 2025 | ▲ 75.2K |
MORGAN STANLEY biological products, (no diagnostic substances) | 102.9K | 1.56% | 1.56% | $1.84B | May 27, 2026 | ▲ 6.6K |
DIMENSIONAL FUND ADVISORS LP biological products, (no diagnostic substances) | 80.8K | 1.23% | 1.23% | $1.44B | Nov 12, 2025 | ▼ 2.0K |
BLACKROCK, INC. biological products, (no diagnostic substances) | 61.7K | 93.50% | 93.50% | $1.10B | Nov 12, 2025 | ▲ 10.9K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
9
Increased
+347.0K shares4
New Positions
first time holders10
Decreased
−79.4K shares9
Sold Out
fully exitedNet shares change (top 50)
+267.7K
+347.0K / −79.4K
Net new holders
-6
4 new / 9 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
TIL insider trading · insider activity
Source: SEC Form 4
Insiders have been primarily selling shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
2
Buy transactions
4
Sell transactions
0.50
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
Laumas Sandeep CFO and CBO | Sep 10, 2025 | Sale | 17,539 | $23.04 | $404.1K | 12.5K | Form 4 ↗ |
Laumas Sandeep CFO and CBO | Sep 10, 2025 | Sale | 12,461 | $23.88 | $297.6K | 0 | Form 4 ↗ |
Binder Gwendolyn director | May 28, 2025 | Award | 6,500 | $26.75 | $173.9K | 6.5K | Form 4 ↗ |
Gibson Neil W director | May 28, 2025 | Award | 6,500 | $26.75 | $173.9K | 6.5K | Form 4 ↗ |
Matcham George director | May 28, 2025 | Award | 6,500 | $26.75 | $173.9K | 6.5K | Form 4 ↗ |
McGaughy R Kent Jr director | May 28, 2025 | Award | 6,500 | $26.75 | $173.9K | 6.5K | Form 4 ↗ |
Laumas Sandeep CFO and CBO | Apr 25, 2025 | Award | 44,851 | $12.78 | $573.2K | 44.9K | Form 4 ↗ |
Crouch Bronson CEO and Chairman | Apr 25, 2025 | Award | 105,157 | $12.78 | $1.34M | 105.2K | Form 4 ↗ |
Laumas Sandeep CFO and CBO | Sep 18, 2024 | Award | 45,000 | $66.10 | $2.97M | 45.0K | Form 4 ↗ |
Crouch Bronson CEO and Chairman | Sep 18, 2024 | Award | 50,000 | $66.10 | $3.30M | 50.0K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Instil Bio, Inc. (TIL) is primarily owned by institutional investors, who hold approximately 39.1% of total shares outstanding. Company insiders own approximately 46.60%, while retail and public investors account for the remaining 14.25%.
The largest institutional shareholder of Instil Bio, Inc. is BML CAPITAL MANAGEMENT, LLC, holding approximately 645,600 shares — equal to 9.79% of outstanding shares — as of September 30, 2025.
A total of 33 institutional investors currently hold TIL stock, with a combined institutional value of approximately $47,423,593 as of the most recent 13F filing period.
Frequently asked questions
TIL ownershipInstil Bio, Inc. (TIL) is primarily owned by institutional investors, who hold approximately 39.1% of shares. The largest shareholder is BML CAPITAL MANAGEMENT, LLC with a 9.79% stake. Company insiders hold 46.60%. Data sourced from SEC Form 13F as of September 30, 2025.