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 Form 13F filings. 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 2016Ariel Appreciation FundSell-1,4551,004,492$137,334
Q4 2015Renaissance Technologies LLCSell-8,02081,500$11,301
Q4 2015Ariel Appreciation FundBuy5,7861,005,947$139,485
Q3 2015Ariel Appreciation FundSell-122,8221,000,161$134,332
Q3 2015Renaissance Technologies LLCBuy30,02089,520$12,023
Q2 2015Renaissance Technologies LLCSell-57,70059,500$8,961
Q2 2015Ariel Appreciation FundSell-18,1591,122,983$169,132
Q1 2015Ariel Appreciation FundBuy80,5751,141,142$154,260
Q1 2015Renaissance Technologies LLCBuy35,000117,200$15,843
Q4 2014Renaissance Technologies LLCBuy7,70082,200$9,910
Q4 2014Ariel Appreciation FundSell-6,6591,060,567$127,862
Q3 2014Ariel Appreciation FundBuy83,7741,067,226$121,023
Q3 2014Renaissance Technologies LLCBuy13,00074,500$8,448
Q2 2014Ariel Appreciation FundSell-41,277983,452$117,729
Q2 2014Renaissance Technologies LLCBuy31,73061,500$7,362
Q1 2014Ariel Appreciation FundSell-77,8781,024,729$131,288
Q1 2014Renaissance Technologies LLCBuy87029,770$3,814
Q4 2013Renaissance Technologies LLCSell-42,80028,900$3,572
Q4 2013Ariel Appreciation FundBuy5,9941,102,607$136,293
Q3 2013Ariel Appreciation FundBuy84,2071,096,613$128,918
Q3 2013Renaissance Technologies LLCSell-31,50071,700$8,429
Q2 2013Ariel Appreciation FundBuy1,012,4061,012,406$113,592
Q2 2013Renaissance Technologies LLCBuy103,200103,200$11,579

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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