Puma Biotechnology PBYI Institutional Ownership

NASDAQ PBYI

$9.84 -0.09 (-0.91%)

At close: Oct 1, 2026 · 4:00 PM EDT

Institutions by Trading Activity

162 Institutions

Increased 83 51.2%

Unchanged 27 16.7%

Reduced 52 32.1%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

76.14%

▲+1.67 pp QoQ

Shares Held by Institutions

38.78Mn

of 50.94Mn outstanding

▲+3.03% QoQ

Shares Outstanding

50.94Mn

12.16Mn held outside 13F filers

Institutional Investors

162

filed 13F for Jun 2026

▲+5 vs prior quarter

Net Shares Added (QoQ)

+1.14Mn

accumulated since last quarter

Value of Holdings

$385.13Mn

reported market value

Shares Owned by Institutions

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Institutions

Accumulated Distributed

Latest quarter —

Net over range —

Accumulating quarters —

Ownership Summary

Quarter ending 30 Jun, 2026

Puma Biotechnology, Inc. (NASDAQ:PBYI) is held by 162 institutional investors per 13F filings through June 2026.

They owned 76.1% of outstanding stock in June 2026, up from 74.5% the prior quarter.
Their total shares held in PBYI increased 3.03% quarter over quarter, and separately, investors owning Puma Biotechnology increased 35.0% from a year ago.
During the quarter, 83 of these 162 funds increased positions in PBYI, 52 reduced exposure, and 27 held steady.
Altogether, these fund groups held 38.78Mn shares in PBYI by June 2026, up by 1.14Mn shares quarter on quarter, and up 6.79Mn shares year over year.
As of June 30, 2026, the biggest holder of Puma Biotechnology is ACORN CAPITAL ADVISORS, LLC at 4.13Mn shares, representing 8.11% of shares outstanding.
The most significant purchases of PBYI for the quarter ending June 2026 came from LSV ASSET MANAGEMENT (435.11K), AMERICAN CENTURY COMPANIES INC (403.65K), GEODE CAPITAL MANAGEMENT, LLC (322.06K), Invesco Ltd. (205.96K), BlackRock, Inc. (205.78K).
Top sellers of PBYI stock for the quarter ending June 2026 included MILLENNIUM MANAGEMENT LLC (875.28K), Connor, Clark & Lunn Investment Management Ltd. (139.85K), RENAISSANCE TECHNOLOGIES LLC (106.2K), Morgan Stanley (94.07K), Sei Investments Co (89.51K).
Puma Biotechnology's 10 largest shareholders as of June 2026 include ACORN CAPITAL ADVISORS, LLC (4.13Mn), BlackRock, Inc. (3.8Mn), AMERICAN CENTURY COMPANIES INC (2.32Mn), ACADIAN ASSET MANAGEMENT LLC (2.05Mn), RENAISSANCE TECHNOLOGIES LLC (1.84Mn), VANGUARD CAPITAL MANAGEMENT LLC (1.84Mn), VANGUARD PORTFOLIO MANAGEMENT LLC (1.83Mn), LSV ASSET MANAGEMENT (1.62Mn), DIMENSIONAL FUND ADVISORS LP (1.52Mn), GEODE CAPITAL MANAGEMENT, LLC (1.34Mn) per Business Quant data.

Form 13F Holdings

162 Institutional Holders

Report period 30 Jun, 2026

Total shares held 38.78Mn

Of outstanding 76.14%

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	ACORN CAPITAL ADVISORS, LLC	0002054410	4,131,299	8.11%	0	0.00%	$33.50Mn
2	BlackRock, Inc.	0002012383	3,804,736	7.47%	▲205,784	+5.72%	$30.86Mn
3	AMERICAN CENTURY COMPANIES INC	0000748054	2,319,996	4.55%	▲403,650	+21.06%	$18.82Mn
4	ACADIAN ASSET MANAGEMENT LLC	0000916542	2,053,523	4.03%	▲11,764	+0.58%	$16.65K
5	RENAISSANCE TECHNOLOGIES LLC	0001037389	1,836,213	3.60%	▼106,200	-5.47%	$14.89Mn
6	VANGUARD CAPITAL MANAGEMENT LLC	0002100119	1,835,643	3.60%	▲17,962	+0.99%	$14.89Mn
7	VANGUARD PORTFOLIO MANAGEMENT LLC	0002100121	1,825,599	3.58%	▲90,950	+5.24%	$14.81Mn
8	LSV ASSET MANAGEMENT	0001050470	1,617,981	3.18%	▲435,113	+36.78%	$13.12K
9	DIMENSIONAL FUND ADVISORS LP	0000354204	1,518,014	2.98%	▲81,908	+5.70%	$12.31Mn
10	GEODE CAPITAL MANAGEMENT, LLC	0001214717	1,339,405	2.63%	▲322,063	+31.66%	$10.86Mn
11	O'SHAUGHNESSY ASSET MANAGEMENT, LLC	0001423442	1,123,783	2.21%	▼14,386	-1.26%	$9.11Mn
12	State Street Corp	0000093751	952,165	1.87%	▲34,575	+3.77%	$7.72Mn
13	KENNEDY CAPITAL MANAGEMENT LLC	0000884589	873,253	1.71%	▼16,348	-1.84%	$7.08Mn
14	BRIDGEWAY CAPITAL MANAGEMENT, LLC	0001107261	791,616	1.55%	▲16,275	+2.10%	$6.42Mn
15	RITHOLTZ WEALTH MANAGEMENT	0001698218	749,798	1.47%	▼24,510	-3.17%	$6.08Mn
16	AQR CAPITAL MANAGEMENT LLC	0001167557	725,192	1.42%	▼75,002	-9.37%	$5.88Mn
17	Goldman Sachs Group Inc	0000886982	669,156	1.31%	▼563	-0.08%	$5.43Mn
18	Northern Trust Corp	0000073124	652,386	1.28%	▲10,633	+1.66%	$5.29Mn
19	Connor, Clark & Lunn Investment Management Ltd.	0001596800	642,946	1.26%	▼139,852	-17.87%	$5.21Mn
20	UBS Group AG	0001610520	636,761	1.25%	▲102,534	+19.19%	$5.16Mn

Showing 1 to 20 of 162 holders