ALTR (ALTR) Institutional Ownership Changes & 13F Activity

ALTR. 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 Mairs & Power Growth Fund, ARK Invest, Polen Capital Management, and Renaissance Technologies LLC.

Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q4 2024Mairs & Power Growth FundSell-122,9634,431$483,466
Q4 2024ARK InvestSell-5,18335,280$3,849,401
Q3 2024ARK InvestSell-10,06740,463$3,864,621
Q3 2024Mairs & Power Growth FundSell-3,514127,394$12,167,401
Q2 2024Mairs & Power Growth FundSell-7,880130,908$12,839,457
Q2 2024ARK InvestSell-5,29450,530$4,955,982
Q1 2024Mairs & Power Growth FundSell-21,410138,788$11,956,586
Q1 2024ARK InvestSell-4,52555,824$4,809,238
Q4 2023Mairs & Power Growth FundSell-21,730160,198$13,480,662
Q4 2023ARK InvestSell-10,12560,349$5,078,368
Q3 2023Mairs & Power Growth FundBuy24,323181,928$11,381,416
Q3 2023ARK InvestSell-18,47870,474$4,408,853
Q2 2023ARK InvestSell-37,05088,952$6,746,120
Q2 2023Mairs & Power Growth FundBuy4,530157,605$11,952,763
Q2 2023Polen Capital ManagementSell-2,40567,792$5,141,354
Q1 2023Polen Capital ManagementSell-44,46870,197$5,061,912
Q1 2023Mairs & Power Growth FundBuy27,360153,075$11,038,238
Q1 2023ARK InvestSell-14,199126,002$9,086,004
Q4 2022Polen Capital ManagementSell-21,473114,665$5,213,818
Q4 2022Mairs & Power Growth FundBuy15,190125,715$5,716,261
Q4 2022ARK InvestBuy1,663140,201$6,374,939
Q3 2022Renaissance Technologies LLCBuy71,000111,300$4,922
Q3 2022Mairs & Power Growth FundBuy27,975110,525$4,887
Q3 2022Polen Capital ManagementBuy13,627136,138$6,020
Q3 2022ARK InvestSell-9,360138,538$6,126
Q2 2022Mairs & Power Growth FundBuy82,55082,550$4,334
Q2 2022ARK InvestSell-22,697147,898$8,128
Q2 2022Polen Capital ManagementSell-21,725122,511$6,432
Q2 2022Renaissance Technologies LLCBuy5,90040,300$2,116
Q1 2022ARK InvestSell-42,981170,595$10,986

Frequently asked questions about ALTR activity

  • Which institutional owners are buying ALTR?

    Institutional owners buying ALTR 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 ALTR activity?

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

  • Is institutional interest in ALTR increasing?

    Institutional interest in ALTR 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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