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ACTG

Acacia Research Corp

Company with tickers: ACTG

CIK
934549
CUSIP
003881307
Shares Outstanding
96,589,132
Price History Institutional Holders Short Volume Short Interest Fails to Deliver Financials SEC Filings Earnings Calls Insider Trades Congressional Trades
Holders: 113
Total Value: $394,884,717
Total Shares: 82,096,629
Showing 1–100 of 116 holdings by value · page 1 of 2

Institutional Ownership Trend

25 quarters

Holder Concentration

Across 113 13F filers · Δ vs Dec 31, 2025
Top Holder
74.5%
−0.5 pts
Top 5
86.4%
−0.3 pts
Top 10
92.1%
−0.4 pts
HHI
5,591
Highly concentrated −71

Quarterly Activity

vs Dec 31, 2025
New
110
Increased
2
Decreased
0
Sold Out
92
Unchanged
1
Holder count: +18
Institutional value: +29.4%
Shares held: +0.6%

Top Buyers

vs Dec 31, 2025
Institution Added Now Holds
Mega GOLDMAN SACHS GROUP INC +275,110 584,102
Small Essential Partners LLC +155 200

Top Sellers

vs Dec 31, 2025
No qualifying movers this quarter.

Top New Positions

vs Dec 31, 2025
Institution Acquired Value (USD)
Mid Starboard Value LP 61,123,595 $294,004,491
Mega STATE STREET CORP 3,105,041 $14,935,247
Mega DIMENSIONAL FUND ADVISORS LP 2,853,889 $13,727,204
Mega BlackRock, Inc. 2,406,367 $11,574,623
Large RENAISSANCE TECHNOLOGIES LLC 1,407,584 $6,770,479

Top Sold-Out Positions

vs Dec 31, 2025
Institution Previously Held Last Value (USD)
Mid Starboard Value LP 61,123,595 $228,602,245
Mega STATE STREET CORP 3,145,981 $11,765,968
Mega DIMENSIONAL FUND ADVISORS LP 2,690,956 $10,064,173
Mega BlackRock, Inc. 2,363,847 $8,840,786
Large RENAISSANCE TECHNOLOGIES LLC 1,395,300 $5,218,422
100 of 100 shown
All Common Calls Puts
Export CSV
Holder Value (USD) % of 13F Shares Action
Mid Starboard Value LP $294,004,491 74.45% 61,123,595 View
Mega STATE STREET CORP $14,935,247 3.78% 3,105,041 View
Mega DIMENSIONAL FUND ADVISORS LP $13,727,204 3.48% 2,853,889 View
Mega BlackRock, Inc. $11,574,623 2.93% 2,406,367 View
Large RENAISSANCE TECHNOLOGIES LLC $6,770,479 1.71% 1,407,584 View
Mid Krilogy Financial LLC $5,423,212 1.37% 1,127,487 View
Small Peapod Lane Capital LLC $5,249,326 1.33% 1,091,336 View
Mega GEODE CAPITAL MANAGEMENT, LLC $4,125,627 1.04% 857,719 View
Small Formidable Asset Management, LLC $4,034,959 1.02% 838,869 View
Small Pacific Ridge Capital Partners, LLC $3,930,934 1.00% 817,242 View
Mid BRIDGEWAY CAPITAL MANAGEMENT, LLC $2,902,883 0.74% 603,510 View
Mega GOLDMAN SACHS GROUP INC $2,809,529 0.71% 584,102 View
Mega AMERICAN CENTURY COMPANIES INC $2,459,708 0.62% 511,374 View
Small AEGIS FINANCIAL CORP $2,362,123 0.60% 491,086 View
Large Tidal Investments LLC $2,104,028 0.53% 437,428 View
Large Empowered Funds, LLC $1,636,410 0.41% 340,210 View
Mega CITADEL ADVISORS LLC $950,316 0.24% 197,571 View
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $944,183 0.24% 196,296 View
Mega FRANKLIN RESOURCES INC $891,235 0.23% 185,288 View
Mega JANE STREET GROUP, LLC $843,725 0.21% 175,411 View
Small CORSAIR CAPITAL MANAGEMENT, L.P. $801,692 0.20% 166,672 View
Large ACADIAN ASSET MANAGEMENT LLC $748,065 0.19% 155,523 View
Micro Marquette Asset Management, LLC $718,652 0.18% 149,408 View
Large MARSHALL WACE, LLP $559,350 0.14% 116,289 View
Mega UBS Group AG $558,305 0.14% 116,072 View
Mega JPMORGAN CHASE & CO $557,265 0.14% 115,856 View
Mega Bank of New York Mellon Corp $540,786 0.14% 112,430 View
Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC $503,698 0.13% 104,719 View
Small Capital Wealth Alliance, LLC $500,095 0.13% 103,970 View
Large Point72 Asset Management, L.P. $425,935 0.11% 88,552 View
Mega AQR CAPITAL MANAGEMENT LLC $393,012 0.10% 81,708 View
Mega Invesco Ltd. $368,362 0.09% 76,583 View
Mega FMR LLC $364,405 0.09% 75,760 View
Small GatePass Capital, LLC $363,155 0.09% 75,500 View
Mid RITHOLTZ WEALTH MANAGEMENT $312,544 0.08% 64,978 View
Large O'SHAUGHNESSY ASSET MANAGEMENT, LLC $279,268 0.07% 58,060 View
Mid Cornerstone Investment Partners, LLC $265,146 0.07% 55,124 View
Mega Nuveen, LLC $231,933 0.06% 48,219 View
Large Quantinno Capital Management LP $214,612 0.05% 44,618 View
Mega RHUMBLINE ADVISERS $213,280 0.05% 44,341 View
Mega MILLENNIUM MANAGEMENT LLC $192,606 0.05% 40,043 View
Mega ALLIANCEBERNSTEIN L.P. $181,529 0.05% 37,740 View
Mega LPL Financial LLC $168,350 0.04% 35,000 View
Mid OCCUDO QUANTITATIVE STRATEGIES LP $168,013 0.04% 34,930 View
Mega BANK OF AMERICA CORP /DE/ $160,264 0.04% 33,319 View
Mid SIMPLEX TRADING, LLC $153,703 0.04% 31,955 View
Mid LEVIN CAPITAL STRATEGIES, L.P. $144,300 0.04% 30,000 View
Small Permanent Capital Management, LP $144,300 0.04% 30,000 View
Mega PRICE T ROWE ASSOCIATES INC /MD/ $143,996 0.04% 29,937 View
Mid XTX Topco Ltd $121,101 0.03% 25,177 View
Micro ELKHORN PARTNERS LIMITED PARTNERSHIP $120,250 0.03% 25,000 View
Mid GROUP ONE TRADING LLC $118,455 0.03% 24,627 View
Mega DEUTSCHE BANK AG\ $117,878 0.03% 24,507 View
Small SNS Financial Group, LLC $105,820 0.03% 22,000 View
Mid IMC-Chicago, LLC $103,992 0.03% 21,620 View
Large Creative Planning $100,769 0.03% 20,950 View
Mid Ethic Inc. $96,344 0.02% 20,030 View
Large MetLife Investment Management, LLC $93,544 0.02% 19,448 View
Mega RAYMOND JAMES FINANCIAL INC $88,985 0.02% 18,500 View
Mega CITADEL ADVISORS LLC $85,618 0.02% 17,800 View
Mega CITADEL ADVISORS LLC $84,175 0.02% 17,500 View
Large MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. $78,321 0.02% 16,283 View
Mid Sather Financial Group Inc $73,650 0.02% 15,312 View
Mid Quadrature Capital Ltd $72,529 0.02% 15,079 View
Mid SALEM INVESTMENT COUNSELORS INC $70,533 0.02% 14,664 View
Mid ROYCE & ASSOCIATES LP $70,278 0.02% 14,611 View
Small Investors Research Corp $70,269 0.02% 14,609 View
Small Abel Hall, LLC $69,514 0.02% 14,452 View
Large Corient Private Wealth LLC $68,547 0.02% 14,251 View
Large PRUDENTIAL FINANCIAL INC $68,374 0.02% 14,215 View
Mega WELLS FARGO & COMPANY/MN $62,169 0.02% 12,925 View
Large Police & Firemen's Retirement System of New Jersey $61,370 0.02% 12,759 View
Mega MANUFACTURERS LIFE INSURANCE COMPANY, THE $60,836 0.02% 12,648 View
Large Mariner, LLC $58,417 0.01% 12,145 View
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $56,758 0.01% 11,800 View
Small Gem Investment Advisors, LLC $54,112 0.01% 11,250 View
Mid Jump Financial, LLC $53,391 0.01% 11,100 View
Mega VICTORY CAPITAL MANAGEMENT INC $52,424 0.01% 10,899 View
Mid INTECH INVESTMENT MANAGEMENT LLC $48,999 0.01% 10,187 View
Small Horizon Wealth Management, LLC $48,100 0.01% 10,000 View
Small ZIONS BANCORPORATION, NATIONAL ASSOCIATION /UT/ $43,087 0.01% 8,958 View
Large NEW YORK STATE COMMON RETIREMENT FUND $42,910 0.01% 8,921 View
Mega BNP PARIBAS ARBITRAGE, SA $38,816 0.01% 8,070 View
Mega MORGAN STANLEY $38,042 0.01% 7,909 View
Mega BARCLAYS PLC $31,712 0.01% 6,593 View
Mid MAI Capital Management $31,240 0.01% 6,495 View
Small Capital Advisors, Ltd. LLC $28,860 0.01% 6,000 View
Large CWM, LLC $22,323 0.01% 4,641 View
Mega CITIGROUP INC $15,218 0.00% 3,164 View
Mid Ameritas Investment Partners, Inc. $15,098 0.00% 3,139 View
Large Russell Investments Group, Ltd. $14,645 0.00% 3,045 View
Mega Legal & General Group Plc $14,074 0.00% 2,926 View
Mid Tower Research Capital LLC (TRC) $11,731 0.00% 2,439 View
Large CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM $8,903 0.00% 1,851 View
Mid PNC FINANCIAL SERVICES GROUP, INC. $8,614 0.00% 1,791 View
Mid Sterling Capital Management LLC $5,444 0.00% 1,132 View
Mid OSAIC HOLDINGS, INC. $4,449 0.00% 925 View
Mid HARBOR CAPITAL ADVISORS, INC. $4,252 0.00% 884 View
Micro Torren Management, LLC $2,712 0.00% 564 View
Micro Private Wealth Management Group, LLC $2,092 0.00% 435 View
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