(SRDX) Stock Institutional Trading Activity


(SRDX) position changes reported by tracked institutional filers across multiple SEC 13F reporting periods. Based on recent SEC 13F filings (Q2 2025), investors with some of the largest reported share count changes include Disciplined Growth Investors, Mairs & Power Growth Fund, and Renaissance Technologies LLC. 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 2015Renaissance Technologies LLCBuy119,900754,938$15,303
Q4 2015Disciplined Growth InvestorsSell-1,350180,377$3,656
Q3 2015Mairs & Power Growth FundSell-1,10030,590$668
Q3 2015Renaissance Technologies LLCBuy28,903635,038$13,869
Q3 2015Disciplined Growth InvestorsBuy4,375181,727$3,969
Q2 2015Mairs & Power Growth FundSell-7,75031,690$742
Q2 2015Renaissance Technologies LLCBuy41,297606,135$14,196
Q2 2015Disciplined Growth InvestorsBuy775177,352$4,154
Q1 2015Mairs & Power Growth FundSell-1,35039,440$1,027
Q1 2015Renaissance Technologies LLCSell-17,900564,838$14,703
Q1 2015Disciplined Growth InvestorsSell-2,400176,577$4,596
Q4 2014Mairs & Power Growth FundSell-687,60040,790$901
Q4 2014Renaissance Technologies LLCBuy80,800582,738$12,879
Q4 2014Disciplined Growth InvestorsSell-8,750178,977$3,955
Q3 2014Mairs & Power Growth FundSell-10,080728,390$13,228
Q3 2014Renaissance Technologies LLCSell-2,300501,938$9,115
Q3 2014Disciplined Growth InvestorsSell-34,375187,727$3,409
Q2 2014Mairs & Power Growth FundSell-1,070738,470$15,818
Q2 2014Renaissance Technologies LLCSell-6,157504,238$10,801
Q2 2014Disciplined Growth InvestorsBuy1,482222,102$5,417
Q1 2014Mairs & Power Growth FundSell-6,150739,540$16,714
Q1 2014Renaissance Technologies LLCBuy55,257510,395$11,535
Q1 2014Disciplined Growth InvestorsSell-4,082220,620$6,012
Q4 2013Mairs & Power Growth FundSell-4,850745,690$18,187
Q4 2013Renaissance Technologies LLCBuy29,400455,138$11,101
Q4 2013Disciplined Growth InvestorsSell-2,750224,702$5,480
Q3 2013Mairs & Power Growth FundSell-900750,540$17,848
Q3 2013Renaissance Technologies LLCBuy28,200425,738$10,124
Q3 2013Disciplined Growth InvestorsBuy5,100227,452$5,409
Q2 2013Mairs & Power Growth FundBuy751,440751,440$15,036

Frequently asked questions about SRDX activity

  • Which institutional owners are buying SRDX?

    Institutional owners buying SRDX 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 SRDX activity?

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

  • Is institutional interest in SRDX increasing?

    Institutional interest in SRDX 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.