ALIGN TECHNOLOGY INC (ALGN) Stock Institutional Trading Activity


ALIGN TECHNOLOGY INC (ALGN) position changes reported by tracked institutional filers across multiple SEC 13F reporting periods. Based on recent SEC 13F filings (Q4 2025), investors with some of the largest reported share count changes include Disciplined Growth Investors, Bares Capital Management, Alapocas Investment Partners, Sequoia Financial Advisors, and Giverny Capital. 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
Q3 2018ARK InvestSell-2,23911,982$4,688
Q3 2018Sequoia Financial AdvisorsSell-214744$291
Q3 2018Disciplined Growth InvestorsBuy9,958938,023$366,973
Q3 2018Polen Capital ManagementSell-255,6712,111,097$825,903
Q3 2018Renaissance Technologies LLCSell-180,2192,778,381$1,086,958
Q2 2018Sequoia Financial AdvisorsSell-43958$328
Q2 2018ARK InvestSell-3,86314,221$4,866
Q2 2018Disciplined Growth InvestorsSell-31,300928,065$317,528
Q2 2018Polen Capital ManagementSell-301,6092,366,768$809,766
Q1 2018Polen Capital ManagementBuy46,8712,668,377$670,110
Q1 2018Sequoia Financial AdvisorsSell-2321,001$251
Q1 2018ARK InvestBuy2,01218,084$4,541
Q1 2018Disciplined Growth InvestorsSell-34,252959,365$240,925
Q1 2018Renaissance Technologies LLCBuy344,5002,958,600$742,993
Q4 2017Sequoia Financial AdvisorsSell-2351,233$274
Q4 2017ARK InvestBuy1,87516,072$3,571
Q4 2017Viking Global InvestorsSell-39,435542,532$120,545
Q4 2017Disciplined Growth InvestorsSell-95,751993,617$220,772
Q4 2017Renaissance Technologies LLCBuy576,9002,614,100$580,827
Q4 2017Polen Capital ManagementSell-443,6702,621,506$582,472
Q3 2017Sequoia Financial AdvisorsSell-2921,468$273
Q3 2017ARK InvestBuy1,42414,197$2,644
Q3 2017Viking Global InvestorsBuy581,967581,967$108,403
Q3 2017Disciplined Growth InvestorsSell-20,4991,089,368$202,917
Q3 2017Renaissance Technologies LLCBuy449,5192,037,200$379,469
Q3 2017Polen Capital ManagementSell-297,3943,065,176$570,950
Q2 2017Sequoia Financial AdvisorsBuy1,7601,760$264
Q2 2017ARK InvestBuy5,41012,773$1,917
Q2 2017Disciplined Growth InvestorsSell-6,0341,109,867$166,613
Q2 2017Renaissance Technologies LLCBuy160,8811,587,681$238,343

Frequently asked questions about ALGN activity

  • Which institutional owners are buying ALGN?

    Institutional owners buying ALGN 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 ALGN activity?

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

  • Is institutional interest in ALGN increasing?

    Institutional interest in ALGN 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.