TIL · Instil Bio, Inc. · Holdings

$5.97 +0.18 (+3.02%)

Market Cap

$39.27M

6.78M

Volume · Oct 20 60.42K Avg daily vol (3M) 16.15K

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Use institutional holdings through the 13F API or MCP → See every holder of TIL: 13F, 13D and 13G, insiders and funds →

Institutional holdings are being reconciled with SEC filings. Holder totals and changes may be incomplete until reconciliation finishes.

The Sep 30, 2026 filing window is still open — showing the latest known positions. Funds that have not filed yet carry their prior-quarter positions; a fund that filed without this stock counts as sold out. Each fund's Change is measured against its own previous reported quarter, shown in the Reported column. Pick a completed quarter in the Quarter selector below to put every fund on one quarter and see the stock-wide activity breakdown.

Quarter:

Holders: 27

Total Value: $29,248,889

Total Shares: 3,803,528

Institutional Ownership Trend

23 quarters

Holder Concentration

Across 26 13F filers

Top Holder

49.9%

of institutional value

Top 5

83.6%

of institutional value

Top 10

93.8%

of institutional value

HHI

2,911

Highly concentrated

Who Holds TIL

Last 8 quarters through Sep 30, 2026 (filing window open)

Each kind of 13F filer's share of the common shares 13F filers report. Holder type comes from regulatory records, never the filer's name; style, turnover and horizon are measured from each filer's own 13F book. The quarter selector does not change this card.

Jun 30, 2026, the newest closed quarter: 26 filers, like-for-like change +0.5%; actively managed books +2.5%; index-like books -6.5%.

Holder type	Share	Filers	Change	New	Exited
Registered adviser	20.8%	10	-0.6%	1	4
Exempt adviser	19.6%	2	-10.1%	0	0
Adviser	1.3%	1	0.0%	0	0
Bank	5.1%	4	+592.2%	1	1
Broker-dealer	0.8%	1	0.0%	0	0
Non-US	0.0%	1	0.0%	0	0
Holding company	1.8%	2	-6.1%	0	0
Benefit plan	0.0%	0	—	0	0
Unknown	50.6%	5	-2.9%	3	5

Style	Share	Filers	Change	New	Exited
Index-like	8.3%	6	-6.5%	0	1
Systematic-like	4.3%	3	-24.2%	1	3
Concentrated	19.6%	2	-11.1%	0	2
Diversified active	17.9%	14	+37.6%	4	4
Unknown	49.9%	1	0.0%	0	0
Not measured	0.0%	0	—	0	0

Turnover	Share	Filers	Change	New	Exited
Low turnover	55.0%	10	-0.7%	2	5
Medium turnover	31.8%	8	+18.8%	2	1
High turnover	4.3%	3	-28.0%	1	4
Unknown	8.9%	5	-21.8%	0	0
Not measured	0.0%	0	—	0	0

Holding horizon	Share	Filers	Change	New	Exited
Short horizon	8.9%	5	-27.9%	0	2
Medium horizon	18.4%	2	+0.5%	0	1
Long horizon	65.0%	18	+7.1%	5	5
Unknown	7.7%	1	-6.5%	0	2
Not measured	0.0%	0	—	0	0

13F book size	Share	Filers	Change	New	Exited
Under $1B	69.5%	3	-3.8%	0	3
$1B to $10B	8.1%	4	-10.6%	2	3
$10B to $100B	3.8%	3	+31.3%	1	1
$100B or more	18.6%	16	+21.2%	2	3
Not measured	0.0%	0	—	0	0

Client base	Share	Filers	Change	New	Exited
Individuals and high net worth	0.4%	1	-0.8%	0	2
Pooled investment vehicles	13.4%	5	-4.7%	0	1
Registered funds and BDCs	5.8%	3	-9.0%	0	0
Diversified	1.1%	1	new	1	0
Governments and sovereign funds	0.0%	0	-100.0%	0	1
Unknown	79.2%	16	+0.7%	4	6

Private funds	Share	Filers	Change	New	Exited
Hedge funds	23.8%	5	+2.0%	1	1
Private equity funds	8.1%	2	0.0%	0	0
Other private funds	3.0%	2	-43.2%	0	1
Mixed private funds	0.0%	0	—	0	0
No private funds	5.5%	3	-7.9%	0	1
Real estate funds	0.0%	0	-100.0%	0	1
Unknown	59.6%	14	+4.9%	4	6

Location	Share	Filers	Change	New	Exited
United States	95.3%	24	-3.3%	5	8
Outside the US	4.7%	2	+381.7%	0	2

The Sep 30, 2026 filing window is still open, so its bar carries the Jun 30, 2026 positions of filers that have not filed yet.

How the mix is measured

Shares are 13F common shares restated to today's split basis; options and principal amounts are left out. The change compares only filers with a 13F in both quarters and keeps each filer in its bucket of the later quarter on both sides; a filer that continues under a new CIK is compared through its successor. Holder type comes from each filer's current regulatory profile; client base and private funds come from the Form ADV roster current at each quarter end (rosters from December 2019, so an earlier quarter reads Unknown). Style, turnover, horizon and book size are measured from each filer's 13F book in the newest measured quarter, and Not measured means none was. Actively managed books are those measured systematic-like, concentrated or diversified active.

Excluded 1 holder with no observed 2026-06-30 13F.

Conviction and Crowding

32 13F filers, quarter ended Mar 31, 2026

Measured across every 13F filer's common-share book once the quarter's filing window closed. Crowding counts filers with high turnover or that advise private funds on Form ADV.

Conviction holders

9.38% of filers hold it in their top 10

Dec 31, 2025: 3

Holders above 5%

median weight 0.000%

Dec 31, 2025: 3

Crowding

27.4%

of shares outstanding, 75th percentile

Dec 31, 2025: 27.3%

Private-fund advisers

26.7%

of shares outstanding

Institutional ownership

61.9%

of shares outstanding

Top 10 holders

92.9%

of 13F shares, Herfindahl 0.248

Active holders

-9.1%

like-for-like share change of active filers

5% stakes on record

0 13D, 1 13G (0 institutional, 1 passive, 0 exempt)

How long holders have held it value-weighted 14.0 quarters

Under 1 year 15.0% 1 to 3 years 20.8% 3 years or more 64.2% Since coverage start 0.000%

Estimated Holder Cost Basis

Quarter ended Mar 31, 2026, on that quarter's share basis

Estimated, never filed: each 13F buy is costed at its quarter's average traded price and each sale keeps the average cost, so this is what holders paid on average if they traded evenly through each quarter.

Estimated avg cost

$18.74

estimated per share

Dec 31, 2025: $21.30

Quarter-end price

$8.24

implied by 13F values

Estimated gain or loss

-56.0%

price against the estimated cost

Estimated at a loss

81.5%

of costed 13F value

Estimated cost covers 29.0% of the 13F shares; positions already held when a filer's 13F history starts, or bought in a quarter without a trusted average price, have no estimate.

Shared Holders

Companies TIL's active holders also own, quarter ended Mar 31, 2026

#	Company	Shared holders	Similarity
1	ACRS Aclaris Therapeutics, Inc.	3	0.344

Shareholder Targets

13F filers that own its peers but not TIL, quarter ended Mar 31, 2026

Found through its holder-overlap peers: ACRS. 115 filers in all.

#	Filer	In peers	Of book	Largest peers
1	Deep Track Capital, LP Adviser, Diversified active	$35,043,750 1 held	0.810%	ACRS
2	RA CAPITAL MANAGEMENT, L.P. Registered adviser, Concentrated	$25,515,270 1 held	0.280%	ACRS
3	Frazier Life Sciences Management, L.P. Registered adviser, Concentrated	$18,470,152 1 held	0.490%	ACRS
4	Rock Springs Capital Management LP Registered adviser, Diversified active	$16,772,437 1 held	1.02%	ACRS
5	Decheng Capital LLC Unknown, Concentrated	$15,156,510 1 held	2.29%	ACRS
6	ADAGE CAPITAL PARTNERS GP, L.L.C. Registered adviser, Diversified active	$14,516,250 1 held	0.020%	ACRS
7	Balyasny Asset Management L.P. Registered adviser, Systematic-like	$12,604,980 1 held	0.030%	ACRS
8	BRAIDWELL LP Registered adviser, Diversified active	$6,371,685 1 held	0.260%	ACRS
9	VANGUARD PORTFOLIO MANAGEMENT LLC Registered adviser, Diversified active	$6,210,247 1 held	0.000%	ACRS
10	Palo Alto Investors LP Registered adviser, Concentrated	$6,050,362 1 held	0.950%	ACRS

Fund Ownership of TIL by Fund Type

Registered funds' Form N-PORT reports for the quarter ended Jun 30, 2026

Index funds and index ETFs hold 3.34% of shares outstanding.

Fund type	Of shares outstanding	Change	Shares	Funds
Index funds	0.78%	-0.14 pp	52,971	8
Index ETFs	2.56%	+0.05 pp	173,430	3
Active ETFs	0.13%	-0.28 pp	9,038	3
Active funds	0.78%	-0.26 pp	52,584	4
Unclassified	0.12%	+0.12 pp	7,896	2
All registered funds	4.36%	-0.50 pp	295,919	20

How fund types are measured

Each fund series counts once, with its latest Form N-PORT report dated inside the quarter; only long share positions count, restated to today's split basis. The fund type is the series' latest Form N-CEN answer on or before the quarter end (the index-fund box and the exchange-traded flag), never its name. Unclassified funds have no usable N-CEN; unit investment trusts are among them, so index ownership is a floor. Funds sit inside their advisers' 13F reports, so these shares overlap the 13F figures and are never added to them.

Holder type: Registered adviser 10 Exempt adviser 2 Adviser 1 Bank 4 Broker-dealer 1 Non-US 1 Holding company 2 Unknown 6

Showing 27 of 27

All Common Calls Puts

Compact Export CSV

Holder

Value (USD)

% of 13F

Curative Ventures V LLC

$14,603,340

49.93%

1,899,004

BML Capital Management, LLC

$4,964,664

16.97%

645,600

Vivo Capital, LLC

$2,251,193

7.70%

292,743

UBS Group AG

$1,364,382

4.66%

177,423

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
UBS AG	172,967	$1,330,116	97.5%	Defined
UBS Securities LLC	4,456	$34,266	2.5%	Defined

VANGUARD CAPITAL MANAGEMENT LLC

$1,259,145

4.30%

163,738

MILLENNIUM MANAGEMENT LLC

$1,034,881

3.54%

134,575

Kalehua Capital Management LLC

$765,924

2.62%

99,600

BlackRock, Inc.

$426,824

1.46%

55,504

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BlackRock Investment Management, LLC	726	$5,582	1.3%	Sole
BlackRock Fund Advisors	12,849	$98,808	23.1%	Sole
BlackRock Institutional Trust Company, N.A.	41,929	$322,434	75.5%	Sole

RENAISSANCE TECHNOLOGIES LLC

$386,807

1.32%

50,300

NOMURA ASSET MANAGEMENT INTERNATIONAL INC.

$384,500

1.31%

50,000

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
NOMURA HOLDINGS INC joint	50,000	$384,500	100.0%	Defined

JACOBS LEVY EQUITY MANAGEMENT, INC

$331,062

1.13%

43,051

GEODE CAPITAL MANAGEMENT, LLC

$324,779

1.11%

42,234

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
GEODE CAPITAL MANAGEMENT TRUST COMPANY, LLC	8,118	$62,427	19.2%	Defined
Held directly	34,116	$262,352	80.8%	Defined

LPL Financial LLC

$246,656

0.84%

32,075

CITADEL ADVISORS LLC

$235,613

0.81%

30,639

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Citadel Securities GP LLC	30,639	$235,613	100.0%	Defined

VANGUARD FIDUCIARY TRUST CO

$175,124

0.60%

22,773

STATE STREET CORP

$135,305

0.46%

17,595

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
SSGA FUNDS MANAGEMENT, INC. joint	17,595	$135,305	100.0%	Defined

Americana Partners, LLC

$124,393

0.43%

16,176

DIMENSIONAL FUND ADVISORS LP

$121,201

0.41%

15,761

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Dimensional Fund Advisors Ltd.	458	$3,522	2.9%	Defined
Dimensional Ireland Ltd	4,407	$33,889	28.0%	Defined
Held directly	10,896	$83,790	69.1%	Sole

MORGAN STANLEY

$91,770

0.31%

11,934

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
MORGAN STANLEY & CO. LLC	308	$2,368	2.6%	Defined
MORGAN STANLEY CAPITAL SERVICES, LLC	6,502	$50,000	54.5%	Defined
MORGAN STANLEY SMITH BARNEY LLC	240	$1,845	2.0%	Defined
PARAMETRIC PORTFOLIO ASSOCIATES LLC	4,884	$37,557	40.9%	Defined

Vanguard Global Advisers, LLC

$11,304

0.04%

1,470

NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO

$4,229

0.01%

550

GK Wealth Management LLC

$3,634

0.01%

502

INTERNATIONAL ASSETS INVESTMENT MANAGEMENT, LLC

$961

0.00%

125

CITIGROUP INC

$676

0.00%

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Citigroup Financial Products Inc. joint	88	$676	100.0%	Defined

Tower Research Capital LLC (TRC)

$246

0.00%

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Latour Trading LLC (Latour)	32	$246	100.0%	Defined

BARCLAYS PLC

$223

0.00%

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BARCLAYS CAPITAL INC.	29	$223	100.0%	Defined

BNP PARIBAS ARBITRAGE, SA

$53

0.00%

Key facts CIK 1789769 CUSIP 45783C200 13F (30d) 2 filings 2 filers Visit website Investor relations