ACTG · Acacia Research Corp · Holdings

$4.36 -0.02 (-0.34%) At close · Oct 7

Russell 2000 member Rebalance outlook locked

Market Cap

$421.09M

97.59M

Volume · Oct 7 129.42K Avg daily vol (3M) 221.7K

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Use institutional holdings through the 13F API or MCP →

Some SEC filings for this period have not finished importing. Holder totals and changes may be incomplete; these filings remain queued for recovery.

The Sep 30, 2026 filing window is still open — showing the latest known positions. Funds that have not filed yet carry their prior-quarter positions; a fund that filed without this stock counts as sold out. Each fund's Change is measured against its own previous reported quarter, shown in the Reported column. Pick a completed quarter in the Quarter selector below to put every fund on one quarter and see the stock-wide activity breakdown.

Quarter:

Holders: 123

Total Value: $401,009,072

Total Shares: 86,054,744

Showing 1–100 of 124 holdings by value · page 1 of 2

Institutional Ownership Trend

27 quarters

Superinvestors Holding ACTG

All superinvestors →

Jeffrey Smith $284,835,952

Holder Concentration

Across 123 13F filers

Top Holder

71.0%

of institutional value

Top 5

82.9%

of institutional value

Top 10

89.4%

of institutional value

HHI

5,096

Highly concentrated

Showing 100 of 124

All Common Calls Puts

Compact Export CSV

Holder

Value (USD)

% of 13F

Starboard Value LP

$284,835,952

71.03%

61,123,595

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Starboard Value GP LLC joint	61,123,595	$284,835,952	100.0%	Defined

STATE STREET CORP

$14,756,901

3.68%

3,166,717

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
STATE STREET GLOBAL ADVISORS EUROPE LIMITED joint	3,166,717	$14,756,901	100.0%	Defined

DIMENSIONAL FUND ADVISORS LP

$13,708,428

3.42%

2,941,723

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Dimensional Fund Advisors Ltd.	7,447	$34,703	0.3%	Defined
DFA Australia Ltd.	15,128	$70,496	0.5%	Defined
Dimensional Ireland Ltd	75,084	$349,891	2.6%	Defined
Held directly	2,844,064	$13,253,338	96.7%	Sole

BlackRock, Inc.

$12,103,293

3.02%

2,597,274

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BLACKROCK FINANCIAL MANAGEMENT INC/DE	12,006	$55,947	0.5%	Sole
BlackRock Investment Management, LLC	109,243	$509,072	4.2%	Sole
BLACKROCK ADVISORS LLC	71,760	$334,401	2.8%	Sole
BlackRock Fund Advisors	1,373,360	$6,399,857	52.9%	Sole
BlackRock Institutional Trust Company, N.A.	973,995	$4,538,816	37.5%	Sole
Aperio Group, LLC	56,910	$265,200	2.2%	Sole

VANGUARD CAPITAL MANAGEMENT LLC

$6,920,971

1.73%

1,485,187

RENAISSANCE TECHNOLOGIES LLC

$6,594,310

1.64%

1,415,088

GOLDMAN SACHS GROUP INC

$5,476,258

1.37%

1,175,163

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
GOLDMAN SACHS & CO. LLC	88,214	$411,077	7.5%	Defined
GOLDMAN SACHS ASSET MANAGEMENT, L.P.	1,021,969	$4,762,375	87.0%	Defined
Goldman Sachs Trust Company, N.A. joint	64,980	$302,806	5.5%	Other

Krilogy Financial LLC

$5,255,692

1.31%

1,127,831

Peapod Lane Capital LLC

$4,635,628

1.16%

994,770

GEODE CAPITAL MANAGEMENT, LLC

$4,197,769

1.05%

900,809

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
GEODE CAPITAL MANAGEMENT TRUST COMPANY, LLC	129,177	$601,964	14.3%	Defined
Held directly	771,632	$3,595,805	85.7%	Defined

Pacific Ridge Capital Partners, LLC

$3,779,082

0.94%

810,962

Formidable Asset Management, LLC

$3,696,013

0.92%

793,136

AMERICAN CENTURY COMPANIES INC

$3,230,819

0.81%

693,309

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
AMERICAN CENTURY INVESTMENT MANAGEMENT INC	693,309	$3,230,819	100.0%	Defined

BRIDGEWAY CAPITAL MANAGEMENT, LLC

$2,932,659

0.73%

629,326

AEGIS FINANCIAL CORP

$2,288,460

0.57%

491,086

Tidal Investments LLC

$1,976,646

0.49%

424,173

Empowered Funds, LLC

$1,705,681

0.43%

366,026

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Bridgeway Capital Management, LLC	366,026	$1,705,681	100.0%	Other

NORTHERN TRUST CORP

$1,350,629

0.34%

289,835

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
NORTHERN TRUST CO joint	284,823	$1,327,274	98.3%	Defined
DWS INVESTMENT MANAGEMENT AMERICAS, INC joint	5,012	$23,355	1.7%	Other

VANGUARD PORTFOLIO MANAGEMENT LLC

$1,348,585

0.34%

289,396

SUSQUEHANNA INTERNATIONAL GROUP, LLP

$1,344,232

0.34%

288,462

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
SUSQUEHANNA SECURITIES, LLC	288,462	$1,344,232	100.0%	Other

ACADIAN ASSET MANAGEMENT LLC

$1,229,666

0.31%

263,877

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Acadian Inc	263,877	$1,229,666	100.0%	Defined

CITADEL ADVISORS LLC

$1,162,781

0.29%

249,524

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Citadel Securities GP LLC	249,524	$1,162,781	100.0%	Defined

AQR CAPITAL MANAGEMENT LLC

$1,101,584

0.27%

236,392

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
RF&L WEALTH MANAGEMENT, LLC	41	$191	0.0%	Other
Prism Planning Partners LLC	175	$815	0.1%	Other
Compound Planning, Inc.	13	$60	0.0%	Other
Arax Advisory Partners	4,507	$21,002	1.9%	Other
HALBERT HARGROVE GLOBAL ADVISORS, LLC	2,042	$9,515	0.9%	Other
Stokes Family Office, LLC	79	$368	0.0%	Other
Held directly	229,535	$1,069,633	97.1%	Defined

VANGUARD FIDUCIARY TRUST CO

$1,096,763

0.27%

235,357

MORGAN STANLEY

$993,215

0.25%

213,137

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
MORGAN STANLEY & CO INTERNATIONAL PLC	201	$936	0.1%	Defined
MORGAN STANLEY & CO. LLC	9,814	$45,733	4.6%	Defined
MORGAN STANLEY CAPITAL SERVICES, LLC	15,841	$73,819	7.4%	Defined
MORGAN STANLEY SMITH BARNEY LLC	29,148	$135,829	13.7%	Defined
PARAMETRIC PORTFOLIO ASSOCIATES LLC	158,133	$736,898	74.2%	Defined

FRANKLIN RESOURCES INC

$886,275

0.22%

190,188

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Brandywine Global Investment Management, LLC	188,320	$877,571	99.0%	Defined
FIDUCIARY TRUST INTERNATIONAL LLC	1,868	$8,704	1.0%	Defined

CORSAIR CAPITAL MANAGEMENT, L.P.

$776,691

0.19%

166,672

O'SHAUGHNESSY ASSET MANAGEMENT, LLC

$699,801

0.17%

150,172

Marquette Asset Management, LLC

$626,616

0.16%

134,467

UBS Group AG

$590,184

0.15%

126,649

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
UBS Financial Services Inc	1,100	$5,126	0.9%	Defined
UBS AG	125,549	$585,058	99.1%	Defined

RITHOLTZ WEALTH MANAGEMENT

$533,481

0.13%

114,481

CHARLES SCHWAB INVESTMENT MANAGEMENT INC

$521,994

0.13%

112,016

Bank of New York Mellon Corp

$521,299

0.13%

111,867

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Mellon Investments Corporation	58,347	$271,897	52.2%	Defined
The Bank of New York Mellon	53,518	$249,393	47.8%	Defined
Held directly	2	$9	0.0%	Defined

JANE STREET GROUP, LLC

$520,862

0.13%

111,773

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Jane Street Capital, LLC	111,773	$520,862	100.0%	Defined

Quantinno Capital Management LP

$494,612

0.12%

106,140

Capital Wealth Alliance, LLC

$484,500

0.12%

103,970

JPMORGAN CHASE & CO

$417,399

0.10%

89,571

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
JPMorgan Chase Bank, N.A.	14,504	$67,588	16.2%	Defined
J.P. Morgan Investment Management Inc.	1,560	$7,269	1.7%	Defined
J.P. Morgan Securities LLC	72,844	$339,453	81.3%	Defined
J.P. Morgan Securities plc	663	$3,089	0.7%	Defined

FMR LLC

$352,925

0.09%

75,735

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Fidelity Management & Research Co LLC	75,735	$352,925	100.0%	Defined

GatePass Capital, LLC

$351,830

0.09%

75,500

SIMPLEX TRADING, LLC

$303,379

0.08%

65,103

STATE OF WISCONSIN INVESTMENT BOARD

$263,378

0.07%

56,519

Cornerstone Investment Partners, LLC

$245,111

0.06%

52,599

Nuveen, LLC

$224,700

0.06%

48,219

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
TEACHERS ADVISORS, LLC joint	48,219	$224,700	100.0%	Defined

RHUMBLINE ADVISERS

$208,446

0.05%

44,731

ALLIANCEBERNSTEIN L.P.

$199,634

0.05%

42,840

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Equitable Holdings, Inc.	42,840	$199,634	100.0%	Defined

Point72 Asset Management, L.P.

$197,630

0.05%

42,410

Jump Financial, LLC

$178,235

0.04%

38,248

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Jump Trading Holdings, LLC	148	$689	0.4%	Defined
Leap GP LLC joint	38,100	$177,546	99.6%	Defined

DEUTSCHE BANK AG\

$159,101

0.04%

34,142

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
DWS Investments UK Ltd	34,142	$159,101	100.0%	Defined

PRICE T ROWE ASSOCIATES INC /MD/

$147,763

0.04%

31,709

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
T. Rowe Price International Ltd	31,709	$147,763	100.0%	Defined

Invesco Ltd.

$142,254

0.04%

30,527

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Invesco Advisers, Inc. joint	4,071	$18,970	13.3%	Defined
Invesco Trust Co joint	13,964	$65,072	45.7%	Defined
Invesco Capital Management LLC	12,492	$58,212	40.9%	Defined

WELLS FARGO & COMPANY/MN

$141,202

0.04%

30,301

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
WELLS FARGO BANK N A	29,301	$136,542	96.7%	Defined
WELLS FARGO CLEARING SERVICES, LLC	1,000	$4,660	3.3%	Defined

Permanent Capital Management, LP

$139,800

0.03%

30,000

LEVIN CAPITAL STRATEGIES, L.P.

$139,800

0.03%

30,000

MERCER GLOBAL ADVISORS INC /ADV

$127,586

0.03%

27,379

XTX Topco Ltd

$119,482

0.03%

25,640

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
XTX EXECUTION SERVICES LLC joint	25,640	$119,482	100.0%	Defined

ELKHORN PARTNERS LIMITED PARTNERSHIP

$116,500

0.03%

25,000

BANK OF AMERICA CORP /DE/

$111,942

0.03%

24,022

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BANK OF AMERICA NA	24,022	$111,942	100.0%	Defined

Mariner, LLC

$109,440

0.03%

23,485

IEQ CAPITAL, LLC

$104,663

0.03%

22,460

SUSQUEHANNA INTERNATIONAL GROUP, LLP

$99,724

0.02%

21,400

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
SUSQUEHANNA SECURITIES, LLC	21,400	$99,724	100.0%	Other

GSA CAPITAL PARTNERS LLP

$99,710

0.02%

21,397

MetLife Investment Management, LLC

$94,639

0.02%

20,309

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
METLIFE INC	20,309	$94,639	100.0%	Defined

LPL Financial LLC

$93,200

0.02%

20,000

Ethic Inc.

$91,718

0.02%

19,682

GROUP ONE TRADING LLC

$90,800

0.02%

19,485

Russell Investments Group, Ltd.

$87,956

0.02%

18,875

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Russell Investment Management, LLC	18,875	$87,956	100.0%	Defined

RAYMOND JAMES FINANCIAL INC

$86,210

0.02%

18,500

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
RAYMOND JAMES & ASSOCIATES	18,500	$86,210	100.0%	Defined

IMC-Chicago, LLC

$81,755

0.02%

17,544

WEALTH ENHANCEMENT ADVISORY SERVICES, LLC

$78,516

0.02%

16,849

CITIGROUP INC

$75,263

0.02%

16,151

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Citigroup Financial Products Inc. joint	16,151	$75,263	100.0%	Defined

MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.

$75,081

0.02%

16,112

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Global X Management CO LLC joint	16,112	$75,081	100.0%	Defined

Sather Financial Group Inc

$71,353

0.02%

15,312

SALEM INVESTMENT COUNSELORS INC

$68,334

0.02%

14,664

ROYCE & ASSOCIATES LP

$68,087

0.02%

14,611

Abel Hall, LLC

$67,178

0.02%

14,416

MANUFACTURERS LIFE INSURANCE COMPANY, THE

$64,340

0.02%

13,807

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
MANULIFE FINANCIAL CORP joint	13,807	$64,340	100.0%	Defined

Investors Research Corp

$61,671

0.02%

14,309

Vanguard Global Advisers, LLC

$59,456

0.01%

12,759

Police & Firemen's Retirement System of New Jersey

$59,456

0.01%

12,759

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Mellon Capital	12,759	$59,456	100.0%	Defined

SG Americas Securities, LLC

$55,458

0.01%

11,901

Gem Investment Advisors, LLC

$52,425

0.01%

11,250

VICTORY CAPITAL MANAGEMENT INC

$51,353

0.01%

11,020

Quadrature Capital Ltd

$46,814

0.01%

10,046

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Quadrature US Inc.	10,046	$46,814	100.0%	Other

Horizon Wealth Management, LLC

$46,600

0.01%

10,000

NEW YORK STATE COMMON RETIREMENT FUND

$41,571

0.01%

8,921

BNP PARIBAS ARBITRAGE, SA

$29,931

0.01%

6,423

Capital Advisors, Ltd. LLC

$27,960

0.01%

6,000

ZIONS BANCORPORATION, NATIONAL ASSOCIATION /UT/

$27,657

0.01%

5,935

BARCLAYS PLC

$26,193

0.01%

5,621

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BARCLAYS BANK PLC	4,658	$21,706	82.9%	Defined
BARCLAYS CAPITAL INC.	963	$4,487	17.1%	Defined

Arax Advisory Partners

$22,675

0.01%

4,866

Tower Research Capital LLC (TRC)

$18,015

0.00%

3,866

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Latour Trading LLC (Latour)	3,866	$18,015	100.0%	Defined

Optiver Holding B.V.

$15,648

0.00%

3,358

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Optiver VOF	3,358	$15,648	100.0%	Defined

Ameritas Investment Partners, Inc.

$14,627

0.00%

3,139

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
EATON VANCE MANAGEMENT	3,139	$14,627	100.0%	Other

Legal & General Group Plc

$13,635

0.00%

2,926

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Legal & General Investment Management America Inc	2,926	$13,635	100.0%	Defined

EFG International AG

$13,607

0.00%

2,920

PNC FINANCIAL SERVICES GROUP, INC.

$8,346

0.00%

1,791

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
PNC Bank, National Association	1,791	$8,346	100.0%	Defined

ROYAL BANK OF CANADA

$7,884

0.00%

1,692

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
RBC CMA LTD.	1,042	$4,855	61.6%	Defined
RBC Capital Markets, LLC	650	$3,029	38.4%	Defined

OSAIC HOLDINGS, INC.

$4,310

0.00%

925

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
OSAIC WEALTH, INC.	925	$4,310	100.0%	Defined

HARBOR CAPITAL ADVISORS, INC.

$3,714

0.00%

797

Sterling Capital Management LLC

$2,982

0.00%

640

Key facts CIK 934549 CUSIP 003881307 13F (30d) 4 filings 4 filers Visit website Investor relations