(SRDX) Institutional Ownership Changes & 13F Activity

SRDX. 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 Disciplined Growth Investors, Mairs & Power Growth Fund, and Renaissance Technologies LLC.

Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q4 2021Renaissance Technologies LLCSell-69,900719,638$34,651
Q4 2021Disciplined Growth InvestorsSell-7,088399,979$19,259
Q4 2021Mairs & Power Growth FundSell-5660,464$2,911
Q3 2021Renaissance Technologies LLCSell-29,500789,538$43,898
Q3 2021Mairs & Power Growth FundSell-4460,520$3,365
Q2 2021Disciplined Growth InvestorsBuy80,655407,067$22,083
Q2 2021Renaissance Technologies LLCBuy15,000819,038$44,433
Q2 2021Mairs & Power Growth FundSell-4860,564$3,286
Q1 2021Disciplined Growth InvestorsBuy184,117326,412$18,302
Q1 2021Renaissance Technologies LLCSell-81,800804,038$45,082
Q1 2021Mairs & Power Growth FundBuy16,12560,612$3,399
Q4 2020Disciplined Growth InvestorsSell-8,601142,295$6,193
Q4 2020Renaissance Technologies LLCSell-3,100885,838$38,552
Q4 2020Mairs & Power Growth FundBuy28944,487$1,936
Q3 2020Renaissance Technologies LLCBuy46,338888,938$34,589
Q3 2020Mairs & Power Growth FundSell-1,30044,198$1,720
Q3 2020Disciplined Growth InvestorsSell-1,086150,896$5,871
Q2 2020Renaissance Technologies LLCSell-15,600842,600$36,434
Q2 2020Disciplined Growth InvestorsSell-4,498151,982$6,572
Q2 2020Mairs & Power Growth FundBuy30045,498$1,967
Q1 2020Renaissance Technologies LLCSell-27,538858,200$28,595
Q1 2020Disciplined Growth InvestorsSell-19,559156,480$5,214
Q4 2019Renaissance Technologies LLCSell-83,800885,738$36,696
Q4 2019Mairs & Power Growth FundBuy15,80045,198$1,873
Q4 2019Disciplined Growth InvestorsBuy655176,039$7,293
Q3 2019Renaissance Technologies LLCSell-81,000969,538$44,347
Q3 2019Mairs & Power Growth FundBuy26,09829,398$1,345
Q3 2019Disciplined Growth InvestorsBuy493175,384$8,022
Q2 2019Renaissance Technologies LLCSell-8,5001,050,538$45,352
Q2 2019Disciplined Growth InvestorsBuy531174,891$7,550

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.

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