ILLUMINA INC (ILMN) Stock Institutional Trading Activity


ILLUMINA INC (ILMN) position changes reported by tracked institutional filers across multiple SEC 13F reporting periods. Based on recent SEC 13F filings (Q4 2025), investors with some of the largest reported share count changes include Renaissance Technologies LLC, Triple Frond Partners, ARK Invest, Sequoia Financial Advisors, and AKO Capital. Explore insights into buying and selling patterns, position changes, and investment conviction levels to understand institutional trading behavior and market dynamics.

Explore more:

Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q4 2025Renaissance Technologies LLCSell-70,3001,134,642$148,819,645
Q4 2025Triple Frond PartnersSell-16,440374,160$49,075
Q3 2025ARK InvestBuy299,8011,467,879$139,404,511
Q3 2025Sequoia Financial AdvisorsBuy2376,196$588,407
Q3 2025Renaissance Technologies LLCBuy183,0821,204,942$114,433,342
Q3 2025Triple Frond PartnersBuy390,600390,600$37,095
Q2 2025ARK InvestBuy272,7591,168,078$111,446,333
Q2 2025Sequoia Financial AdvisorsBuy1,8685,959$568,511
Q2 2025Renaissance Technologies LLCSell-67,7001,021,860$97,495,663
Q2 2025AKO CapitalSell-355,760533,954$50,945
Q1 2025ARK InvestBuy208,989895,319$71,034,619
Q1 2025Icahn Capital ManagementBuy180,000220,000$17,454,800
Q1 2025AKO CapitalBuy394,428889,714$70,590
Q1 2025Sequoia Financial AdvisorsSell-1,6424,091$324,593
Q1 2025Thunderbird PartnersBuy63,249152,073$12,065,472
Q1 2025Renaissance Technologies LLCBuy184,7001,089,560$86,445,690
Q4 2024ARK InvestBuy635,745686,330$91,714,265
Q4 2024Icahn Capital ManagementSell-390,00040,000$5,345,200
Q4 2024AKO CapitalBuy495,286495,286$66,185
Q4 2024Sequoia Financial AdvisorsBuy7895,733$766,123
Q4 2024Thunderbird PartnersBuy88,82488,824$11,869,551
Q4 2024Renaissance Technologies LLCSell-179,100904,860$120,916,442
Q3 2024Sequoia Financial AdvisorsBuy3074,944$644,768
Q3 2024Renaissance Technologies LLCBuy83,6421,083,960$141,359,224
Q2 2024Sequoia Financial AdvisorsSell-5934,637$484,027
Q2 2024Renaissance Technologies LLCBuy242,8001,000,318$104,413,193
Q1 2024Renaissance Technologies LLCBuy255,300757,518$104,022
Q1 2024Sequoia Financial AdvisorsSell-6225,230$718,150
Q1 2024ValueAct HoldingsSell-84,268243,777$33,475,458
Q4 2023Renaissance Technologies LLCBuy441,981502,218$69,929

Frequently asked questions about ILMN activity

  • Which institutional owners are buying ILMN?

    Institutional owners buying ILMN 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 ILMN activity?

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

  • Is institutional interest in ILMN increasing?

    Institutional interest in ILMN 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.