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 122 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	$14.17M 4,131,299 shares	9.27%	+191.25K(+4.90%)Added	SEC filing ↗ Aug 14, 2025	▾
02	BlackRock, Inc. CIK 2012383 · View history	$13.16M 3,835,715 shares	0.00%	-11.65K(-0.30%)Reduced	SEC filing ↗ Aug 12, 2025	▾
03	VANGUARD GROUP INC CIK 102909 · View history	$12.71M 3,706,452 shares	0.00%	+37.19K(+1.00%)Added	SEC filing ↗ Aug 11, 2025	▾
04	ACADIAN ASSET MANAGEMENT LLC CIK 916542 · View history	$6.88M 2,008,146 shares	0.01%	0(0.00%)Unchanged	SEC filing ↗ Aug 7, 2025	▾
05	RENAISSANCE TECHNOLOGIES LLC CIK 1037389 · View history	$6.43M 1,874,713 shares	0.01%	+45.50K(+2.50%)Added	SEC filing ↗ Aug 13, 2025	▾
06	AMERICAN CENTURY COMPANIES INC CIK 748054 · View history	$4.60M 1,342,275 shares	0.00%	+192.62K(+16.80%)Added	SEC filing ↗ Aug 12, 2025	▾
07	DIMENSIONAL FUND ADVISORS LP CIK 354204 · View history	$3.94M 1,150,040 shares	0.00%	+261.38K(+29.40%)Added	SEC filing ↗ Aug 12, 2025	▾
08	KENNEDY CAPITAL MANAGEMENT LLC CIK 884589 · View history	$3.39M 987,001 shares	0.08%	+75.88K(+8.30%)Added	SEC filing ↗ Aug 13, 2025	▾
09	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$3.33M 971,674 shares	0.00%	+16.22K(+1.70%)Added	SEC filing ↗ Aug 8, 2025	▾
10	Connor, Clark & Lunn Investment Management Ltd. CIK 1596800 · View history	$3.09M 900,256 shares	0.01%	+68.57K(+8.20%)Added	SEC filing ↗ Aug 7, 2025	▾
11	JANUS HENDERSON GROUP PLC CIK 1274173 · View history	$2.56M 745,541 shares	0.00%	+745.54KNew	SEC filing ↗ Aug 14, 2025	▾
12	STATE STREET CORP CIK 93751 · View history	$2.52M 734,606 shares	0.00%	+84.81K(+13.10%)Added	SEC filing ↗ Aug 14, 2025	▾
13	D. E. Shaw & Co., Inc. CIK 1009207 · View history	$2.20M 640,780 shares	0.00%	+69.11K(+12.10%)Added	SEC filing ↗ Aug 14, 2025	▾
14	LSV ASSET MANAGEMENT CIK 1050470 · View history	$1.84M 535,740 shares	0.00%	+482.34K(+903.30%)Added	SEC filing ↗ Aug 11, 2025	▾
15	CITADEL ADVISORS LLC CIK 1423053 · View history	$1.74M 507,818 shares	0.00%	+507.82KNew	SEC filing ↗ Aug 14, 2025	▾
16	GLOBEFLEX CAPITAL L P CIK 921531 · View history	$1.55M 452,606 shares	0.13%	0(0.00%)Unchanged	SEC filing ↗ Aug 14, 2025	▾
17	ARROWSTREET CAPITAL, LIMITED PARTNERSHIP CIK 1164508 · View history	$1.55M 451,633 shares	0.00%	+93.01K(+25.90%)Added	SEC filing ↗ Aug 13, 2025	▾
18	LOS ANGELES CAPITAL MANAGEMENT LLC CIK 1177206 · View history	$1.53M 445,477 shares	0.01%	+38.62K(+9.50%)Added	SEC filing ↗ Aug 7, 2025	▾
19	O'SHAUGHNESSY ASSET MANAGEMENT, LLC CIK 1423442 · View history	$1.50M 437,660 shares	0.01%	+329.71K(+305.40%)Added	SEC filing ↗ Aug 12, 2025	▾
20	SEI INVESTMENTS CO CIK 350894 · View history	$1.19M 347,234 shares	0.00%	-445(-0.10%)Reduced	SEC filing ↗ Aug 14, 2025	▾

Showing 20 / 122 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

122

Cancelled or null records excluded

Disclosed shares

32,811,551

Not deduplicated across managers

Disclosed value

$112.54M

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. · Q2 2025

Explore all 122 reporting institutions.

This page includes 20 of 122 reporting institutions. Log in to look up the full history beyond 3 years, use advanced screening & filtering, download CSV, and get the complete set through the Akkru API.

Download CSV
Earlier quarters
Advanced screening & filtering
API & AI access

Already have an account?

＋ New accounts get free API credits to explore data beyond ownership filings.

For AI agents & developers

The initial HTML of this page carries its exact data as script#research-data (JSON): values, units, scope, preview limits and SEC sources. Read it directly, no script or API key needed; script#research-access says what needs an account. This page lists 20 of 122 reporting institutions; totals use the complete disclosed data.

Without an account: the last 3 years, with the row caps stated on the page. A free account opens all history on file on these pages and the CSV of what a page shows. Rows beyond the caps and bulk retrieval go through the authenticated API / MCP / CLI.

MCP  https://api.akkrudata.ai/mcp

akkru_institutional_holdings
{"action":"holders","cusip":"74587V107","quarter":"2025Q2","type":"positions","page_size":100}

Connect to MCP with OAuth and follow the returned pagination. Credits and usage limits depend on the account.

MCP endpoint: https://api.akkrudata.ai/mcp
API / MCP / CLI documentation: /documents
llms.txt: /llms.txt

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.