ACACIA RESEARCH CORP (ACTG) Institutional Ownership Changes & 13F Activity

ACACIA RESEARCH CORP (ACTG) institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC 13F filings (Q1 2026). This page analyzes institutional buying and selling activity, new holdings, and sold-out positions among tracked filers. Notable filers include Renaissance Technologies LLC and Ariel Appreciation Fund.

Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q3 2019Renaissance Technologies LLCSell-41,6003,443,700$9,229
Q2 2019Ariel Appreciation FundSell-23,1532,428,943$7,190
Q2 2019Renaissance Technologies LLCBuy21,8003,485,300$10,316
Q1 2019Renaissance Technologies LLCBuy124,7003,463,500$11,291
Q1 2019Ariel Appreciation FundSell-62,3402,452,096$7,994
Q4 2018Renaissance Technologies LLCSell-31,9003,338,800$9,950
Q3 2018Renaissance Technologies LLCSell-81,0003,370,700$10,786
Q1 2018Ariel Appreciation FundSell-290,2502,514,436$8,801
Q1 2018Renaissance Technologies LLCBuy42,7003,451,700$12,081
Q4 2017Ariel Appreciation FundSell-147,4292,804,686$11,359
Q4 2017Renaissance Technologies LLCSell-120,0003,409,000$13,806
Q3 2017Ariel Appreciation FundSell-461,6432,952,115$13,432
Q3 2017Renaissance Technologies LLCSell-44,8003,529,000$16,057
Q2 2017Renaissance Technologies LLCBuy68,2003,573,800$14,653
Q2 2017Ariel Appreciation FundBuy5843,413,758$13,996
Q1 2017Renaissance Technologies LLCBuy103,8003,505,600$20,157
Q4 2016Renaissance Technologies LLCBuy418,5003,401,800$22,112
Q4 2016Ariel Appreciation FundBuy6,4813,413,174$22,186
Q3 2016Renaissance Technologies LLCBuy610,8002,983,300$19,451
Q3 2016Ariel Appreciation FundSell-241,7843,406,693$22,212
Q2 2016Renaissance Technologies LLCBuy239,6002,372,500$10,439
Q2 2016Ariel Appreciation FundBuy59,5163,648,477$16,053
Q1 2016Renaissance Technologies LLCBuy932,9002,132,900$8,084
Q1 2016Ariel Appreciation FundBuy3,9753,588,961$13,602
Q4 2015Renaissance Technologies LLCBuy676,8001,200,000$5,148
Q4 2015Ariel Appreciation FundBuy378,6343,584,986$15,380
Q3 2015Ariel Appreciation FundBuy447,4833,206,352$29,114
Q3 2015Renaissance Technologies LLCBuy36,000523,200$4,751
Q2 2015Ariel Appreciation FundBuy683,2922,758,869$24,195
Q2 2015Renaissance Technologies LLCBuy219,800487,200$4,273

Frequently asked questions about ACTG activity

  • Which institutional owners are buying ACTG?

    Institutional owners buying ACTG include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.

  • What does "buy" mean in ACTG activity?

    "Buy" means an investor increased their reported position in ACTG compared to the prior reporting period. This reflects growing exposure to ACACIA RESEARCH CORP (ACTG) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).

  • Is institutional interest in ACTG increasing?

    Institutional interest in ACTG can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.

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