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 117 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 · Amended · View history	$11.66M 3,940,052 shares	7.78%	0(0.00%)Unchanged	SEC filing ↗ May 19, 2025	▾
02	BlackRock, Inc. CIK 2012383 · View history	$11.39M 3,847,368 shares	0.00%	+23.56K(+0.60%)Added	SEC filing ↗ May 2, 2025	▾
03	VANGUARD GROUP INC CIK 102909 · View history	$10.86M 3,669,263 shares	0.00%	+25.84K(+0.70%)Added	SEC filing ↗ May 9, 2025	▾
04	ACADIAN ASSET MANAGEMENT LLC CIK 916542 · View history	$5.94M 2,008,146 shares	0.02%	+36.02K(+1.80%)Added	SEC filing ↗ May 21, 2025	▾
05	RENAISSANCE TECHNOLOGIES LLC CIK 1037389 · View history	$5.41M 1,829,213 shares	0.01%	+73.70K(+4.20%)Added	SEC filing ↗ May 14, 2025	▾
06	MILLENNIUM MANAGEMENT LLC CIK 1273087 · View history	$4.10M 1,385,194 shares	0.00%	-508.93K(-26.90%)Reduced	SEC filing ↗ May 15, 2025	▾
07	AMERICAN CENTURY COMPANIES INC CIK 748054 · View history	$3.40M 1,149,660 shares	0.00%	+201.28K(+21.20%)Added	SEC filing ↗ May 13, 2025	▾
08	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$2.83M 955,456 shares	0.00%	+36.02K(+3.90%)Added	SEC filing ↗ May 13, 2025	▾
09	KENNEDY CAPITAL MANAGEMENT LLC CIK 884589 · View history	$2.70M 911,123 shares	0.06%	+101.75K(+12.60%)Added	SEC filing ↗ May 13, 2025	▾
10	DIMENSIONAL FUND ADVISORS LP CIK 354204 · View history	$2.63M 888,663 shares	0.00%	+24.90K(+2.90%)Added	SEC filing ↗ May 13, 2025	▾
11	Connor, Clark & Lunn Investment Management Ltd. CIK 1596800 · View history	$2.46M 831,689 shares	0.01%	+344.32K(+70.60%)Added	SEC filing ↗ May 12, 2025	▾
12	STATE STREET CORP CIK 93751 · View history	$1.92M 649,792 shares	0.00%	+39.85K(+6.50%)Added	SEC filing ↗ May 15, 2025	▾
13	D. E. Shaw & Co., Inc. CIK 1009207 · View history	$1.69M 571,665 shares	0.00%	+349.06K(+156.80%)Added	SEC filing ↗ May 15, 2025	▾
14	GLOBEFLEX CAPITAL L P CIK 921531 · View history	$1.34M 452,606 shares	0.12%	0(0.00%)Unchanged	SEC filing ↗ May 12, 2025	▾
15	LOS ANGELES CAPITAL MANAGEMENT LLC CIK 1177206 · View history	$1.20M 406,854 shares	0.01%	+121.17K(+42.40%)Added	SEC filing ↗ May 5, 2025	▾
16	ARROWSTREET CAPITAL, LIMITED PARTNERSHIP CIK 1164508 · View history	$1.06M 358,621 shares	0.00%	+358.62KNew	SEC filing ↗ May 14, 2025	▾
17	SEI INVESTMENTS CO CIK 350894 · Amended · View history	$1.03M 347,679 shares	0.00%	+36.02K(+11.60%)Added	SEC filing ↗ May 14, 2025	▾
18	Bank of New York Mellon Corp CIK 1390777 · View history	$1.01M 340,886 shares	0.00%	+9.03K(+2.70%)Added	SEC filing ↗ Apr 29, 2025	▾
19	NORTHERN TRUST CORP CIK 73124 · View history	$939.62K 317,438 shares	0.00%	-7.98K(-2.50%)Reduced	SEC filing ↗ May 13, 2025	▾
20	PRUDENTIAL FINANCIAL INC CIK 1137774 · View history	$912.14K 308,155 shares	0.00%	+201.87K(+189.90%)Added	SEC filing ↗ May 13, 2025	▾

Showing 20 / 117 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

117

Cancelled or null records excluded

Disclosed shares

30,413,709

Not deduplicated across managers

Disclosed value

$90.02M

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 2025

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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.