ACTG · Acacia Research Corp · Shareholders & Ownership

$4.38 +0.08 (+1.74%) Q2 2026 earnings call transcript

Russell 2000 member Rebalance outlook locked

Market Cap

$419.62M

97.59M

Volume · Oct 28 89.91K Avg daily vol (3M) 198.12K

Every disclosed holder of ACTG in one list: 13F institutions, Schedule 13D and 13G filers, insiders (Forms 3, 4 and 5) and registered funds, each from its own latest filing. Holders nest by CIK and SEC reporting links, never by name, and each is summed once.

How the holder list picks a filing →

Who Owns ACTG

13F quarter Sep 30, 2026, combined view: filers that have not filed yet carry their Jun 30, 2026 positions

Holder group	Holders	Shares	% Out	Summed
Institutional (13F)	127	86,007,521	88.13%	Yes
Insiders (Forms 3, 4, 5)	11	1,560,774	1.60%	Yes
13D/G-only blocks	0	0	0.00%	Yes
Remaining	—	10,018,510	10.27%	Rest
Registered funds (N-PORT, not summed)	120	10,247,956	10.50%	No

Shares outstanding: 97,586,805, the issuer's latest cover-page count restated onto today's split basis.

13D/G-only counts each filer's latest 13D or 13G that no 13F report of the listing contains, that names no 13F filer and that no counted insider files. Funds are never summed: their shares sit inside their advisers' 13F reports.

Holders of ACTG

One row per holder Every filing By ultimate parent

All 13F Funds Insiders 13D/G Non-US

#	Holder	Shares	% Out	Change	As of	Notes
1	Starboard Value LP 13F CIK 1517137 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	61,123,595	62.64%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
1.1	Starboard Principal Co LP Insider CIK 1517139 · May 16, 2025 10% Owner, issuer-wide, not summed	61,123,595	62.64%	0	May 16, 2025	10% Owner, issuer-wide, not summed
1.2	Starboard Value LP Insider CIK 1517137 · May 16, 2025 10% Owner, issuer-wide, not summed	61,123,595	62.64%	0	May 16, 2025	10% Owner, issuer-wide, not summed
2	STATE STREET CORP 13F CIK 93751 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	3,166,717	3.25%	+61,676	Jun 30, 2026	carried, not yet filed for the newest quarter
2.1	STATE STREET SMALL/MID CAP EQUITY INDEX PORTFOLIO Fund S000050332 · Registered fund · Jun 30, 2026 STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed	10,700	0.01%	0	Jun 30, 2026	STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed
2.2	State Street Total Return V.I.S. Fund Fund S000001637 · Registered fund · Jun 30, 2026 STATE STREET VARIABLE INSURANCE SERIES FUNDS INC, not summed	611	0.00%	-371	Jun 30, 2026	STATE STREET VARIABLE INSURANCE SERIES FUNDS INC, not summed
3	DIMENSIONAL FUND ADVISORS LP 13F CIK 354204 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	2,941,723	3.01%	+87,834	Jun 30, 2026	carried, not yet filed for the newest quarter
3.1	U.S. SMALL CAP VALUE PORTFOLIO Fund S000000987 · Registered fund · Jul 31, 2026 DFA INVESTMENT DIMENSIONS GROUP INC, not summed	477,731	0.49%	+27,372	Jul 31, 2026	DFA INVESTMENT DIMENSIONS GROUP INC, not summed
3.2	U.S. SMALL CAP PORTFOLIO Fund S000000971 · Registered fund · Jul 31, 2026 DFA INVESTMENT DIMENSIONS GROUP INC, not summed	407,222	0.42%	+47,200	Jul 31, 2026	DFA INVESTMENT DIMENSIONS GROUP INC, not summed
3.3	Dimensional U.S. Small Cap ETF Fund S000070906 · Registered fund · Jul 31, 2026 Dimensional ETF Trust, not summed	321,032	0.33%	+11,400	Jul 31, 2026	Dimensional ETF Trust, not summed
3.4	Dimensional U.S. Targeted Value ETF Fund S000070901 · Registered fund · Jul 31, 2026 Dimensional ETF Trust, not summed	301,339	0.31%	-77,803	Jul 31, 2026	Dimensional ETF Trust, not summed
3.5	U.S. Targeted Value Portfolio Fund S000000970 · Registered fund · Jul 31, 2026 DFA INVESTMENT DIMENSIONS GROUP INC, not summed	236,087	0.24%	-129,360	Jul 31, 2026	DFA INVESTMENT DIMENSIONS GROUP INC, not summed
4	BlackRock, Inc. 13F CIK 2012383 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	2,597,274	2.66%	+190,907	Jun 30, 2026	carried, not yet filed for the newest quarter
4.1	iShares Russell 2000 ETF Fund S000004344 · Registered fund · Jun 30, 2026 iShares Trust, not summed	897,231	0.92%	+62,658	Jun 30, 2026	iShares Trust, not summed
4.2	iShares Russell 2000 Value ETF Fund S000004342 · Registered fund · Jun 30, 2026 iShares Trust, not summed	324,178	0.33%	+27,020	Jun 30, 2026	iShares Trust, not summed
4.3	iShares Micro-Cap ETF Fund S000004439 · Registered fund · Jun 30, 2026 iShares Trust, not summed	117,423	0.12%	+31,999	Jun 30, 2026	iShares Trust, not summed
4.4	Master Small Cap Index Series Fund S000002716 · Registered fund · Jun 30, 2026 Quantitative Master Series LLC, not summed	63,257	0.06%	0	Jun 30, 2026	Quantitative Master Series LLC, not summed
4.5	iShares Russell 3000 ETF Fund S000004341 · Registered fund · Jun 30, 2026 iShares Trust, not summed	31,031	0.03%	-238	Jun 30, 2026	iShares Trust, not summed
5	VANGUARD CAPITAL MANAGEMENT LLC 13F CIK 2100119 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,485,187	1.52%	-110,934	Jun 30, 2026	carried, not yet filed for the newest quarter
6	RENAISSANCE TECHNOLOGIES LLC 13F CIK 1037389 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,415,088	1.45%	+7,504	Jun 30, 2026	carried, not yet filed for the newest quarter
7	Krilogy Financial LLC 13F CIK 1659047 · Registered investment adviser · Sep 30, 2026	1,287,657	1.32%	+159,826	Sep 30, 2026
8	GOLDMAN SACHS GROUP INC 13F CIK 886982 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	1,175,163	1.20%	+591,061	Jun 30, 2026	carried, not yet filed for the newest quarter
8.1	Goldman Sachs Small Cap Value Insights Fund Fund S000014929 · Registered fund · Jul 31, 2026 Goldman Sachs Trust, not summed	368,136	0.38%	+162,109	Jul 31, 2026	Goldman Sachs Trust, not summed
8.2	Goldman Sachs Small Cap Equity Insights Fund Fund S000009329 · Registered fund · Jul 31, 2026 Goldman Sachs Trust, not summed	127,288	0.13%	+97,143	Jul 31, 2026	Goldman Sachs Trust, not summed
8.3	Goldman Sachs Variable Insurance Trust Small Cap Equity Insights Fund Fund S000009355 · Registered fund · Jun 30, 2026 Goldman Sachs Variable Insurance Trust, not summed	50,470	0.05%	+32,404	Jun 30, 2026	Goldman Sachs Variable Insurance Trust, not summed
8.4	Goldman Sachs Absolute Return Tracker Fund Fund S000020314 · Registered fund · Aug 31, 2026 GOLDMAN SACHS TRUST, not summed	47,802	0.05%	+19,661	Aug 31, 2026	GOLDMAN SACHS TRUST, not summed
9	VANGUARD TOTAL STOCK MARKET INDEX FUND Fund S000002848 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	1,067,521	1.09%	-97,000	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
10	Peapod Lane Capital LLC 13F CIK 2050979 · Registered investment adviser · Sep 30, 2026	928,177	0.95%	-66,593	Sep 30, 2026
11	GEODE CAPITAL MANAGEMENT, LLC 13F CIK 1214717 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	900,809	0.92%	+43,090	Jun 30, 2026	carried, not yet filed for the newest quarter
12	Pacific Ridge Capital Partners, LLC 13F CIK 1591546 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	810,962	0.83%	-6,280	Jun 30, 2026	carried, not yet filed for the newest quarter
13	Formidable Asset Management, LLC 13F CIK 1592613 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	793,136	0.81%	-45,733	Jun 30, 2026	carried, not yet filed for the newest quarter
13.1	Formidable ETF Fund S000071248 · Registered fund · Jun 30, 2026 ETF Opportunities Trust, not summed	424,173	0.43%	-13,255	Jun 30, 2026	ETF Opportunities Trust, not summed
14	AMERICAN CENTURY COMPANIES INC 13F CIK 748054 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	693,309	0.71%	+181,935	Jun 30, 2026	carried, not yet filed for the newest quarter
15	BRIDGEWAY CAPITAL MANAGEMENT, LLC 13F CIK 1107261 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	629,326	0.64%	+25,816	Jun 30, 2026	carried, not yet filed for the newest quarter
15.1	Omni Small-Cap Value Fund Fund S000033567 · Registered fund · Jun 30, 2026 Bridgeway Funds, Inc., not summed	211,000	0.22%	0	Jun 30, 2026	Bridgeway Funds, Inc., not summed
15.2	Ultra-Small Company Market Fund Fund S000004424 · Registered fund · Jun 30, 2026 Bridgeway Funds, Inc., not summed	50,000	0.05%	0	Jun 30, 2026	Bridgeway Funds, Inc., not summed
16	Avantis U.S. Small Cap Value ETF Fund S000066459 · Registered fund · May 31, 2026 American Century ETF Trust, not summed	562,265	0.58%	+153,223	May 31, 2026	American Century ETF Trust, not summed
17	AEGIS FINANCIAL CORP 13F CIK 1140753 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	491,086	0.50%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
17.1	Aegis Value Fund Fund S000043790 · Registered fund · Jun 30, 2026 Aegis Funds, not summed	491,086	0.50%	0	Jun 30, 2026	Aegis Funds, not summed
18	Tidal Investments LLC 13F CIK 1600064 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	424,173	0.43%	-13,255	Jun 30, 2026	carried, not yet filed for the newest quarter
19	McNulty Martin D. Jr. Insider CIK 1819558 · Jun 8, 2026 Director, Chief Executive Officer, issuer-wide	418,430	0.43%	+252,027	Jun 8, 2026	Director, Chief Executive Officer, issuer-wide
20	VANGUARD EXTENDED MARKET INDEX FUND Fund S000002841 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	386,621	0.40%	-1,404	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
21	Empowered Funds, LLC 13F CIK 1592828 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	366,026	0.38%	+25,816	Jun 30, 2026	carried, not yet filed for the newest quarter
21.1	EA Bridgeway Omni Small-Cap Value ETF Fund S000078089 · Registered fund · Jun 30, 2026 EA Series Trust, not summed	366,026	0.38%	+25,816	Jun 30, 2026	EA Series Trust, not summed
22	Adara Smaller Companies Fund Fund S000047045 · Registered fund · May 31, 2026 RBB Fund, Inc., not summed	319,200	0.33%	0	May 31, 2026	RBB Fund, Inc., not summed
23	NORTHERN TRUST CORP 13F CIK 73124 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	289,835	0.30%	+20,188	Jun 30, 2026	carried, not yet filed for the newest quarter
23.1	Small Cap Index Fund Fund S000001245 · Registered fund · Jun 30, 2026 Northern Funds, not summed	18,261	0.02%	0	Jun 30, 2026	Northern Funds, not summed
23.2	Small Cap Core Fund Fund S000001244 · Registered fund · Jun 30, 2026 Northern Funds, not summed	4,629	0.00%	-200	Jun 30, 2026	Northern Funds, not summed
24	VANGUARD PORTFOLIO MANAGEMENT LLC 13F CIK 2100121 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	289,396	0.30%	+27,487	Jun 30, 2026	carried, not yet filed for the newest quarter
25	SUSQUEHANNA INTERNATIONAL GROUP, LLP 13F CIK 1446194 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	288,462	0.30%	+92,166	Jun 30, 2026	carried, not yet filed for the newest quarter
26	ACADIAN ASSET MANAGEMENT LLC 13F CIK 916542 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	263,877	0.27%	+108,354	Jun 30, 2026	carried, not yet filed for the newest quarter
27	OCONNELL MAUREEN Insider CIK 1111318 · Sep 3, 2026 Director, issuer-wide	254,655	0.26%	-33,000	Sep 3, 2026	Director, issuer-wide
28	CITADEL ADVISORS LLC 13F CIK 1423053 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	249,524	0.26%	+51,953	Jun 30, 2026	carried, not yet filed for the newest quarter
29	AQR CAPITAL MANAGEMENT LLC 13F CIK 1167557 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	236,392	0.24%	+154,684	Jun 30, 2026	carried, not yet filed for the newest quarter
30	Soncini Jason W. Insider CIK 1849064 · Jun 8, 2026 General Counsel, issuer-wide	235,615	0.24%	+44,064	Jun 8, 2026	General Counsel, issuer-wide
31	VANGUARD FIDUCIARY TRUST CO 13F CIK 933478 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	235,357	0.24%	+13,978	Jun 30, 2026	carried, not yet filed for the newest quarter
32	MORGAN STANLEY 13F CIK 895421 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	213,137	0.22%	-63,765	Jun 30, 2026	carried, not yet filed for the newest quarter
33	Molinelli Gavin Insider CIK 1460496 · Sep 30, 2026 Director, issuer-wide	212,927	0.22%	+6,961	Sep 30, 2026	Director, issuer-wide
34	FRANKLIN RESOURCES INC 13F CIK 38777 · Investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	190,188	0.19%	+4,900	Jun 30, 2026	carried, not yet filed for the newest quarter
35	VANGUARD RUSSELL 2000 INDEX FUND Fund S000030003 · Registered fund · May 31, 2026 VANGUARD SCOTTSDALE FUNDS, not summed	176,628	0.18%	+7,897	May 31, 2026	VANGUARD SCOTTSDALE FUNDS, not summed
36	CORSAIR CAPITAL MANAGEMENT, L.P. 13F CIK 1276470 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	166,672	0.17%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
37	O'SHAUGHNESSY ASSET MANAGEMENT, LLC 13F CIK 1423442 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	150,172	0.15%	+92,112	Jun 30, 2026	carried, not yet filed for the newest quarter
38	UBS Group AG 13F CIK 1610520 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	126,649	0.13%	+10,577	Jun 30, 2026	carried, not yet filed for the newest quarter
39	RITHOLTZ WEALTH MANAGEMENT 13F CIK 1698218 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	114,481	0.12%	+49,503	Jun 30, 2026	carried, not yet filed for the newest quarter
40	CHARLES SCHWAB INVESTMENT MANAGEMENT INC 13F CIK 884546 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	112,016	0.11%	+7,297	Jun 30, 2026	carried, not yet filed for the newest quarter
40.1	Schwab Small-Cap Index Fund Fund S000005912 · Registered fund · Jul 31, 2026 SCHWAB CAPITAL TRUST, not summed	82,292	0.08%	+7,297	Jul 31, 2026	SCHWAB CAPITAL TRUST, not summed
40.2	Schwab Total Stock Market Index Fund Fund S000005913 · Registered fund · Jul 31, 2026 SCHWAB CAPITAL TRUST, not summed	29,703	0.03%	0	Jul 31, 2026	SCHWAB CAPITAL TRUST, not summed
41	Bank of New York Mellon Corp 13F CIK 1390777 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	111,867	0.11%	-563	Jun 30, 2026	carried, not yet filed for the newest quarter
42	JANE STREET GROUP, LLC 13F CIK 1595888 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	111,773	0.11%	-63,638	Jun 30, 2026	carried, not yet filed for the newest quarter
43	Sundar Ajay Insider CIK 2012004 · Jun 23, 2026 Director, issuer-wide	107,605	0.11%	+4,175	Jun 23, 2026	Director, issuer-wide
44	Quantinno Capital Management LP 13F CIK 1759654 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	106,140	0.11%	+61,522	Jun 30, 2026	carried, not yet filed for the newest quarter
45	Capital Wealth Alliance, LLC 13F CIK 1803277 · Registered investment adviser · Sep 30, 2026	103,195	0.11%	-775	Sep 30, 2026
46	American Beacon Small Cap Value Fund Fund S000001818 · Registered fund · Jul 31, 2026 AMERICAN BEACON FUNDS, not summed	92,759	0.10%	-5,641	Jul 31, 2026	AMERICAN BEACON FUNDS, not summed
47	JPMORGAN CHASE & CO 13F CIK 19617 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	89,571	0.09%	-26,285	Jun 30, 2026	carried, not yet filed for the newest quarter
48	RIBAR GEOFFREY G Insider CIK 1247434 · May 30, 2025 Director, issuer-wide	85,827	0.09%	+32,172	May 30, 2025	Director, issuer-wide
49	Hoover Kirsten Insider CIK 1922248 · Jun 9, 2025 Interim CFO, issuer-wide	84,677	0.09%	-6,464	Jun 9, 2025	Interim CFO, issuer-wide
50	FMR LLC 13F CIK 315066 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	75,735	0.08%	-25	Jun 30, 2026	carried, not yet filed for the newest quarter
50.1	Fidelity Small Cap Index Fund Fund S000033638 · Registered fund · Jul 31, 2026 Fidelity Salem Street Trust, not summed	370,233	0.38%	+37,444	Jul 31, 2026	Fidelity Salem Street Trust, not summed
50.2	Fidelity Extended Market Index Fund Fund S000006021 · Registered fund · Aug 31, 2026 Fidelity Concord Street Trust, not summed	175,593	0.18%	-10,949	Aug 31, 2026	Fidelity Concord Street Trust, not summed
50.3	Fidelity Total Market Index Fund Fund S000006026 · Registered fund · Aug 31, 2026 Fidelity Concord Street Trust, not summed	67,011	0.07%	-53	Aug 31, 2026	Fidelity Concord Street Trust, not summed
50.4	Fidelity Series Total Market Index Fund Fund S000065248 · Registered fund · Aug 31, 2026 Fidelity Concord Street Trust, not summed	51,362	0.05%	0	Aug 31, 2026	Fidelity Concord Street Trust, not summed
50.5	Fidelity Nasdaq Composite Index Fund Fund S000055366 · Registered fund · Aug 31, 2026 Fidelity Concord Street Trust, not summed	49,542	0.05%	-8,516	Aug 31, 2026	Fidelity Concord Street Trust, not summed

14 more nested rows are not shown here; Every filing lists them all.

Shares are restated onto today's split basis. Change compares each row with the same holder's previous filing in the same source; a dash means there is none to compare. Nested 13D/G, insider and fund rows are not summed, since a 13F report already holds them.

Showing 1–50 of 207 holders

Create a free account to page through every holder, filter by source and group by ultimate parent.

Key facts CIK 934549 CUSIP 003881307 13F (30d) 28 filings 25 filers Visit website Investor relations