Company · Ownership research

PUMA BIOTECHNOLOGY, INC. PBYI

CIK 0001401667 · CUSIP 74587V107

Insider trading Initial holdings Institutional holders

Quarter-end disclosures, not live holdings.

Several CUSIPs are reported for this company; this page shows CUSIP 74587V107 (PBYI), not CUSIP 74587V907 (PBYI), CUSIP 74587V957 (PBYI), and does not merge CUSIPs.

This page lists the top 20 of 157 rows by value; the complete set is available through the API.

Some filings reported values in thousands; those figures were scaled ×1,000 to dollars.

Top 20 institutions

Weight means this stock's share of the manager's own portfolio.

By reported value

#	Manager	Value	Manager weight	Change vs prior	Source
01	ACORN CAPITAL ADVISORS, LLC CIK 2054410 · View history	$26.40M 4,131,299 shares	7.50%	0(0.00%)Unchanged	SEC filing ↗ May 15, 2026	▾
02	BlackRock, Inc. CIK 2012383 · View history	$23.00M 3,598,952 shares	0.00%	-43.64K(-1.20%)Reduced	SEC filing ↗ May 13, 2026	▾
03	ACADIAN ASSET MANAGEMENT LLC CIK 916542 · View history	$13.04M 2,041,759 shares	0.02%	+16.94K(+0.80%)Added	SEC filing ↗ May 13, 2026	▾
04	RENAISSANCE TECHNOLOGIES LLC CIK 1037389 · View history	$12.41M 1,942,413 shares	0.02%	-181.40K(-8.50%)Reduced	SEC filing ↗ May 14, 2026	▾
05	AMERICAN CENTURY COMPANIES INC CIK 748054 · View history	$12.25M 1,916,346 shares	0.01%	+266.21K(+16.10%)Added	SEC filing ↗ May 15, 2026	▾
06	VANGUARD CAPITAL MANAGEMENT LLC CIK 2100119 · Amended · View history	$11.61M 1,817,681 shares	0.00%	—	SEC filing ↗ May 15, 2026	▾
07	VANGUARD PORTFOLIO MANAGEMENT LLC CIK 2100121 · Amended · View history	$11.08M 1,734,649 shares	0.00%	—	SEC filing ↗ May 8, 2026	▾
08	MILLENNIUM MANAGEMENT LLC CIK 1273087 · View history	$9.44M 1,477,519 shares	0.01%	+1.46M(+8,793.20%)Added	SEC filing ↗ May 15, 2026	▾
09	DIMENSIONAL FUND ADVISORS LP CIK 354204 · View history	$9.17M 1,436,106 shares	0.00%	+96.50K(+7.20%)Added	SEC filing ↗ May 7, 2026	▾
10	LSV ASSET MANAGEMENT CIK 1050470 · View history	$7.56M 1,182,868 shares	0.02%	+778.07K(+192.20%)Added	SEC filing ↗ May 11, 2026	▾
11	O'SHAUGHNESSY ASSET MANAGEMENT, LLC CIK 1423442 · View history	$7.27M 1,138,169 shares	0.04%	+17.84K(+1.60%)Added	SEC filing ↗ May 13, 2026	▾
12	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$6.50M 1,017,342 shares	0.00%	+23.00K(+2.30%)Added	SEC filing ↗ May 15, 2026	▾
13	STATE STREET CORP CIK 93751 · View history	$5.86M 917,590 shares	0.00%	+40.51K(+4.60%)Added	SEC filing ↗ May 15, 2026	▾
14	KENNEDY CAPITAL MANAGEMENT LLC CIK 884589 · View history	$5.68M 889,601 shares	0.12%	+21.29K(+2.50%)Added	SEC filing ↗ May 13, 2026	▾
15	AQR CAPITAL MANAGEMENT LLC CIK 1167557 · View history	$5.11M 800,194 shares	0.00%	+133.59K(+20.00%)Added	SEC filing ↗ May 15, 2026	▾
16	Connor, Clark & Lunn Investment Management Ltd. CIK 1596800 · View history	$5.00M 782,798 shares	0.01%	-92.50K(-10.60%)Reduced	SEC filing ↗ May 11, 2026	▾
17	BRIDGEWAY CAPITAL MANAGEMENT, LLC CIK 1107261 · View history	$4.95M 775,341 shares	0.10%	+1.86K(+0.20%)Added	SEC filing ↗ May 15, 2026	▾
18	RITHOLTZ WEALTH MANAGEMENT CIK 1698218 · View history	$4.95M 774,308 shares	0.09%	+80.31K(+11.60%)Added	SEC filing ↗ Apr 20, 2026	▾
19	GOLDMAN SACHS GROUP INC CIK 886982 · View history	$4.28M 669,719 shares	0.00%	-124.24K(-15.60%)Reduced	SEC filing ↗ May 15, 2026	▾
20	NORTHERN TRUST CORP CIK 73124 · View history	$4.10M 641,753 shares	0.00%	+25.56K(+4.10%)Added	SEC filing ↗ May 14, 2026	▾

Showing 20 / 157 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

157

Cancelled or null records excluded

Disclosed shares

37,860,858

Not deduplicated across managers

Disclosed value

$241.84M

Not market cap or free float

Reporting institutions by quarter

Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.

PUMA BIOTECHNOLOGY, INC. · Q1 2026

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Sources, coverage & how to read this data

Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.