$INBX

$95.66 +$7.05 (7.96%) Close

$INBX Overview Financial Statements SEC Filings Executives News Red Flags Capital Raising Ownership Insider Transactions Congressional Trades

Ownership

13F as of Q2 2026 · 14.7M shares outstanding

Who owns INBX?

By type of holder

Institutions 97.2% Insiders 2.8% Everyone else 0.0%

Concentration Top 10 holders own 69.3%

Perceptive Advisors LLC 8.8% · Viking Global Investors LP 7.6%

Institutional ownership

97.2%

+10.8 pts vs last qtr

Institutional holders

160

+25 vs last qtr

Net shares bought

+1.6M

by institutions in Q2 2026

New / sold out

50 / 25

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

Bank Of America Corp /de/ +808.5K
Schonfeld Strategic Advisors LLC +442.8K

Biggest sellers in Q2 2026

Viking Global Investors LP −313.8K
Millennium Management LLC −180.7K

Who is planning to sell?

Notices of proposed sale, last 12 months

$279K

5 notices from 1 person

Shares covered

2.5K

0.02% of the company

Arranged in advance

of the value is under a 10b5-1 plan

Under a 10b5-1 plan No plan

Largest proposed sellers

Manhard Kimberly Director $279K

Every notice on Red Flags →

A Form 144 is notice of a planned sale, not the sale itself. What insiders actually sold is on Insider Transactions.

Is your stake being diluted?

Diluted share count, FY2023–FY2025

+31.4%

+14.65% a year

Each share's claim on the business

−23.9%

shrank without buying or selling a share

Spent on buybacks vs paid in stock

— vs $94.5M

over 3 fiscal years

Diluted shares, split-adjusted

Buybacks Stock-based comp

How patient are the owners?

Institutional shares by how long they've been held

5+ years0% 3–5 years0% 1–3 years82% Under 1 year18%

Quarterly turnover

18.7%

of institutional shares changed hands

Top 10 managers, median time held

2 years

Super Investors

Investment managers reporting INBX on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
PA Perceptive Advisors LLC	1.3M	8.82%	−144.9K (−10.0%)	2024	1.9%
Shares held by quarter Peak holding1.5M (Q4'25) Change over 8 quarters+233.7K Share of the company8.820% Perceptive Advisors LLC's full portfolio →
VG Viking Global Investors LP	1.1M	7.64%	−313.8K (−21.8%)	2024	0.3%
Shares held by quarter Peak holding1.8M (Q3'24) Change over 8 quarters−663.8K Share of the company7.640% Viking Global Investors LP's full portfolio →

Perceptive Advisors LLC

1.3M

% of company

8.82%

Change vs last qtr

−144.9K (−10.0%)

Held since

2024

Viking Global Investors LP

1.1M

% of company

7.64%

Change vs last qtr

−313.8K (−21.8%)

Held since

2024

28 more super investors behind a free account

See every manager holding Inhibrx Biosciences Inc, how their position has changed, and how long they've held it.

Institutional Funds

Mutual funds and ETFs reporting INBX on Form N-PORT; together they hold 17.9% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
SS State Street(R) SPDR(R) S&P(R) Biotech ETF SPDR Series Trust	$38M	401.0K	2.72%	0.35%	June 30, 2026
VT Vanguard Total Stock Market Index Fund Vanguard Index Funds	$35M	369.6K	2.51%	0.00%	June 30, 2026

State Street(R) SPDR(R) S&P(R) Biotech ETF

SPDR Series Trust

Position value

$38M

% of company

2.72%

% of the fund

0.35%

As of

June 30, 2026

Vanguard Total Stock Market Index Fund

Vanguard Index Funds

Position value

$35M

% of company

2.51%

% of the fund

0.00%

As of

June 30, 2026

23 more funds behind a free account

See every fund holding Inhibrx Biosciences Inc and how much of the fund the position is.

Insiders and 5%+ holders

From Forms 3/4/5 and Schedules 13D/G

Holder	Shares	% of company	Change vs last qtr	8 quarters	Held since	% of their book
JF Jon Faiz Kayyem 5%+ holder 13D · 7.9%	1.1M	7.81%	—	—	—	—
This holder reports through Schedule 13D/G, not a quarterly 13F. Share of the company7.810% Disclosed stake13D · 7.9% View the 13D/G filing →
ML Mark Lappe 5%+ holder 13D · 6.4%	925.4K	6.29%	—	—	—	—
This holder reports through Schedule 13D/G, not a quarterly 13F. Share of the company6.290% Disclosed stake13D · 6.4% View the 13D/G filing →

Jon Faiz Kayyem

5%+ holder13D · 7.9%

1.1M

% of company

7.81%

Change vs last qtr

—

Held since

—

Mark Lappe

5%+ holder13D · 6.4%

925.4K

% of company

6.29%

Change vs last qtr

—

Held since

—

3 more holders behind a free account

See every insider and 5%+ holder of Inhibrx Biosciences Inc.

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