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Livermore
Livermore
ZHEN

aTYR PHARMA INC

ATYR
Exchange
Nasdaq
Industry
Biological Products, (No Diagnostic Substances)
SEC CIK
0001339970

No open-market purchases or sales by aTYR PHARMA INC insiders were filed in the last 90 days; 89 institutions reported holding it in 13F filings for Q2 2026, worth $23.2M in total; no superinvestor holds it.

Q4 2025 vs. Q3 2025

How the institutions holding aTYR PHARMA INC changed between Q3 2025 and Q4 2025.

All holders in Q4 2025All holders in Q3 2025

13F holders of ATYR: Q3 2025 compared with Q4 2025
MeasureQ3 2025Of which not filed for Q4 2025Q4 2025Change
Holders103184−18
Shares61.9M54.0K54.8M−7.06M (−11.4%)
Value$43.9M$43.0K$42.1M−$1.77M (−4.0%)

1 institution that held it in Q3 2025 haven't filed for Q4 2025 yet. Not filing isn't selling, so the changes leave them out.

New holders (16)

Institutions that held aTYR PHARMA INC at the end of Q4 2025 but not at the end of Q3 2025.

Institutions new to ATYR in Q4 2025
InstitutionSharesValue% of portfolio
Two Sigma Advisers, LP841,350$658.9K0.00%
AQR Capital Management LLC769,820$602.8K0.00%
Virtu Financial LLC78,953$62.0K0.00%
Kingswood Wealth Advisors, LLC52,000$40.7K0.00%
Two Sigma Securities, LLC39,006$30.5K0.00%
LPL Financial LLC30,100$23.6K0.00%
Simplex Trading, LLC26,227$20.5K0.00%
Neuberger Berman Group LLC20,454$16.0K0.00%
Crossmark Global Holdings, Inc.12,666$9.92K0.00%
R Squared Ltd11,255$8.81K0.00%
Jones Financial Companies LLLP1,500$1.18K0.00%
Vision Retirement, LLC1,500$1.18K0.00%
Natixis280$2190.00%
Essential Partners LLC175$1370.00%
EverSource Wealth Advisors, LLC161$1260.00%
Rothschild Investment LLC109$850.00%

Sold out (34)

Institutions that held aTYR PHARMA INC at the end of Q3 2025 and filed for Q4 2025 without it.

Institutions that sold out of ATYR in Q4 2025
InstitutionShares, Q3 2025Value, Q3 2025
Millennium Management LLC1,890,921$1.36M
Tang Capital Management LLC671,134$484.2K
State of Wisconsin Investment Board438,262$316.2K
Ensign Peak Advisors, Inc414,732$299.2K
Artia Global Partners LP372,276$268.6K
Wellington Management Group LLP289,231$208.7K
Flputnam Investment Management Co235,255$169.7K
Brevan Howard Capital Management LP234,613$168.9K
Rafferty Asset Management, LLC170,610$123.1K
Graham Capital Management, L.P.147,851$106.7K
Main Street Financial Solutions, LLC144,950$104.6K
Squarepoint Ops LLC124,924$90.1K
Toronto Dominion Bank109,400$78.9K
Woodline Partners LP102,687$74.1K
D. E. Shaw & Co., Inc.83,312$60.1K
Los Angeles Capital Management LLC45,830$33.1K
DLD Asset Management, LP40,000$28.9K
Profund Advisors LLC36,785$26.5K
Courier Capital LLC25,000$18.0K
Leonteq Securities AG21,146$15.3K
Connor, Clark & Lunn Investment Management Ltd.20,994$15.1K
Hobbs Group Advisors, LLC18,653$13.5K
Blue Rock Wealth Management LLC17,000$12.3K
North Star Asset Management Inc16,800$12.1K
Atom Investors LP13,547$9.77K
United Bank11,970$8.64K
Prudential Financial Inc10,890$7.84K
Signaturefd, LLC1,809$1.30K
Quadrant Capital Group LLC462$334
US Bancorp316$228
Global Retirement Partners, LLC300$216
Advisory Services Network, LLC91$66
Financial Consulate, Inc55$40
T. Rowe Price Investment Management, Inc.141–

Not filed for Q4 2025 yet (1)

Institutions that held aTYR PHARMA INC at the end of Q3 2025 and haven't filed a 13F for Q4 2025. Not filing isn't selling, so they aren't counted as sold out.

Institutions holding ATYR in Q3 2025 that haven't filed for Q4 2025
InstitutionShares, Q3 2025Value, Q3 2025
Wolverine Trading, LLC54,026$43.0K