BIO-RAD LABORATORIES-A (BIO) Institutional Ownership Changes & 13F Activity

BIO-RAD LABORATORIES-A (BIO) 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 Longleaf Partners, First Eagle U.S. Value, Ariel Appreciation Fund, Parnassus Endeavor Fund, and Sequoia Financial Advisors.

Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q1 2026Longleaf PartnersSell-64,826162,804$45,381,615
Q1 2026First Eagle U.S. ValueBuy32,2992,602,772$725,522,734
Q1 2026Ariel Appreciation FundBuy21,289785,961$219,086,629
Q1 2026Parnassus Endeavor FundBuy2,165254,305$70,887,519
Q1 2026Sequoia Financial AdvisorsSell-81750$209,063
Q4 2025Parnassus Endeavor FundSell-63,188252,140$76,395,899
Q4 2025First Eagle U.S. ValueBuy50,1542,570,473$778,827,760
Q4 2025Ariel Appreciation FundSell-44,808764,672$231,687,970
Q4 2025Longleaf PartnersSell-9,624227,630$68,969,614
Q3 2025Longleaf PartnersSell-78,031237,254$66,523,650
Q3 2025Ariel Appreciation FundSell-9,144809,480$226,970,097
Q3 2025First Eagle U.S. ValueBuy3,0062,520,319$706,672,287
Q3 2025Parnassus Endeavor FundSell-1,890315,328$88,414,818
Q2 2025First Eagle U.S. ValueBuy951,1232,517,313$607,478,077
Q2 2025Ariel Appreciation FundBuy93,964818,624$197,550,343
Q2 2025Longleaf PartnersSell-8,520315,285$76,084,575
Q2 2025Parnassus Endeavor FundSell-893317,218$76,551,048
Q1 2025First Eagle U.S. ValueBuy852,6851,566,190$381,461,309
Q1 2025Ariel Appreciation FundBuy164,136724,660$176,498,189
Q1 2025Longleaf PartnersBuy15,336323,805$78,865,946
Q1 2025Parnassus Endeavor FundBuy7,244318,111$77,479,115
Q4 2024Ariel Appreciation FundBuy181,829560,524$184,137,739
Q4 2024Longleaf PartnersSell-9,867308,469$101,335,151
Q4 2024First Eagle U.S. ValueBuy505713,505$234,393,527
Q4 2024Parnassus Endeavor FundBuy135310,867$102,122,918
Q3 2024Ariel Appreciation FundBuy274,508378,695$126,703,773
Q3 2024First Eagle U.S. ValueBuy76,725713,000$238,555,540
Q3 2024Longleaf PartnersSell-6,677318,336$106,508,858
Q2 2024First Eagle U.S. ValueBuy634,311636,275$173,773,065
Q2 2024Parnassus Endeavor FundBuy72,942310,732$84,864,017

Frequently asked questions about BIO activity

  • Which institutional owners are buying BIO?

    Institutional owners buying BIO 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 BIO activity?

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

  • Is institutional interest in BIO increasing?

    Institutional interest in BIO 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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