ATYR PHARMA INC (ATYR) Institutional Ownership Changes & 13F Activity

ATYR PHARMA INC (ATYR). 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 Renaissance Technologies LLC and Viking Global Investors.

Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q1 2026Renaissance Technologies LLCSell-477,83340,522$31,607
Q2 2025Renaissance Technologies LLCBuy38,400518,355$2,628,060
Q1 2025Renaissance Technologies LLCSell-94,500479,955$1,449,464
Q4 2024Renaissance Technologies LLCSell-574,720574,455$2,079,527
Q3 2024Renaissance Technologies LLCSell-144,6391,149,175$2,022,548
Q2 2024Renaissance Technologies LLCBuy20,9591,293,814$2,018,350
Q1 2024Renaissance Technologies LLCBuy394,8831,272,855$2,482
Q4 2023Renaissance Technologies LLCBuy371,979877,972$1,238
Q3 2023Renaissance Technologies LLCSell-20,362505,993$799
Q2 2023Renaissance Technologies LLCBuy368,700526,355$1,137
Q1 2023Renaissance Technologies LLCSell-8,421157,655$331
Q4 2022Renaissance Technologies LLCSell-21,449166,076$364
Q3 2022Renaissance Technologies LLCBuy36,700187,525$563
Q2 2022Renaissance Technologies LLCBuy39,970150,825$427
Q1 2022Renaissance Technologies LLCSell-16,300110,855$593
Q4 2021Renaissance Technologies LLCSell-52,500127,155$950
Q3 2021Renaissance Technologies LLCBuy3,400179,655$1,631
Q2 2021Renaissance Technologies LLCSell-65,705176,255$860
Q1 2021Renaissance Technologies LLCSell-77,170241,960$1,077
Q4 2020Renaissance Technologies LLCSell-89,300319,130$1,238
Q3 2020Renaissance Technologies LLCBuy42,600408,430$1,319
Q2 2020Renaissance Technologies LLCBuy156,830365,830$1,624
Q1 2020Viking Global InvestorsBuy358,161587,444$1,645
Q1 2020Renaissance Technologies LLCBuy9,080209,000$585
Q4 2019Renaissance Technologies LLCBuy6,300199,920$834
Q3 2019Viking Global InvestorsBuy229,283229,283$802
Q3 2019Renaissance Technologies LLCBuy193,620193,620$678

Frequently asked questions about ATYR activity

  • Which institutional owners are buying ATYR?

    Institutional owners buying ATYR 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 ATYR activity?

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

  • Is institutional interest in ATYR increasing?

    Institutional interest in ATYR 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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