(PRO) Stock Institutional Trading Activity


(PRO) position changes reported by tracked institutional filers across multiple SEC 13F reporting periods. Based on recent SEC 13F filings (Q3 2025), investors with some of the largest reported share count changes include Disciplined Growth Investors, Renaissance Technologies LLC, and Sequoia Financial Advisors. Explore insights into buying and selling patterns, position changes, and investment conviction levels to understand institutional trading behavior and market dynamics.

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Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q1 2017Renaissance Technologies LLCSell-37,100229,700$5,556
Q1 2017Disciplined Growth InvestorsBuy50324,925$7,860
Q4 2016Renaissance Technologies LLCBuy77,200266,800$5,742
Q4 2016Disciplined Growth InvestorsBuy28,700324,875$6,991
Q3 2016Renaissance Technologies LLCBuy128,500189,600$4,287
Q3 2016Disciplined Growth InvestorsSell-3,725296,175$6,697
Q2 2016Renaissance Technologies LLCBuy31,90061,100$1,065
Q2 2016Disciplined Growth InvestorsSell-1,750299,900$5,227
Q1 2016Disciplined Growth InvestorsBuy182,050301,650$3,556
Q4 2015Disciplined Growth InvestorsSell-1,300119,600$2,756
Q3 2015Disciplined Growth InvestorsBuy4,100120,900$2,677
Q2 2015Disciplined Growth InvestorsBuy116,800116,800$2,466
Q1 2015Renaissance Technologies LLCSell-42,07529,200$722
Q2 2014Renaissance Technologies LLCSell-37,92571,275$1,885
Q1 2014Renaissance Technologies LLCBuy21,000109,200$3,441
Q4 2013Renaissance Technologies LLCBuy12,20088,200$3,519
Q3 2013Renaissance Technologies LLCSell-3,30076,000$2,598
Q2 2013Renaissance Technologies LLCBuy79,30079,300$2,375

Frequently asked questions about PRO activity

  • Which institutional owners are buying PRO?

    Institutional owners buying PRO 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 PRO activity?

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

  • Is institutional interest in PRO increasing?

    Institutional interest in PRO 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.