aTYR PHARMA INC

ATYR

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

SEC filings (opens in a new tab)

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.

Q1 2025 vs. Q4 2024

How the institutions holding aTYR PHARMA INC changed between Q4 2024 and Q1 2025.

All holders in Q1 2025 All holders in Q4 2024

13F holders of ATYR: Q4 2024 compared with Q1 2025
Measure	Q4 2024	Q1 2025	Change
Holders	77	87	+10
Shares	54.9M	61.8M	+6.89M (+12.6%)
Value	$198.6M	$186.5M	−$12.1M (−6.1%)

New holders (26)

Institutions that held aTYR PHARMA INC at the end of Q1 2025 but not at the end of Q4 2024.

Institutions new to ATYR in Q1 2025
Institution	Shares	Value	% of portfolio
Marshall Wace, LLP	838,452	$2.53M	0.00%
Erste Asset Management GmbH	600,000	$1.81M	0.02%
HRT Financial LP	182,135	$550.0K	0.00%
Dauntless Investment Group, LLC	170,689	$515.5K	1.90%
Wellington Management Group LLP	168,742	$509.6K	0.00%
Main Street Financial Solutions, LLC	134,250	$405.4K	0.04%
Jain Global LLC	88,143	$266.2K	0.01%
Quantessence Capital LLC	61,621	$186.1K	0.05%
Brevan Howard Capital Management LP	53,209	$160.7K	0.00%
LMR Partners LLP	52,087	$157.3K	0.00%
Alliancebernstein L.P.	51,917	$156.8K	0.00%
Cannon Global Investment Management, LLC	47,500	$143.4K	0.40%
Verition Fund Management LLC	45,451	$137.3K	0.00%
Apollon Wealth Management, LLC	23,500	$71.0K	0.00%
Twinbeech Capital LP	21,434	$64.7K	0.00%
Capula Management Ltd	21,126	$63.8K	0.00%
Engineers Gate Manager LP	19,288	$58.3K	0.00%
Capstone Investment Advisors, LLC	18,420	$55.6K	0.00%
Catalyst Funds Management Pty Ltd	17,953	$54.2K	0.01%
United Bank	13,830	$41.8K	0.01%
Hudson Bay Capital Management LP	13,320	$40.2K	0.00%
Y-Intercept (Hong Kong) Ltd	12,583	$38.0K	0.00%
Two Sigma Securities, LLC	11,935	$36.0K	0.01%
Leonteq Securities AG	2,500	$7.55K	0.00%
Caitong International Asset Management Co., Ltd	1,396	$4.22K	0.00%
NBC Securities, Inc.	700	$2.00K	0.00%

Sold out (16)

Institutions that held aTYR PHARMA INC at the end of Q4 2024 and filed for Q1 2025 without it.

Institutions that sold out of ATYR in Q1 2025
Institution	Shares, Q4 2024	Value, Q4 2024
Adage Capital Partners GP, L.L.C.	1,000,000	$3.62M
Logos Global Management LP	1,000,000	$3.62M
Checkpoint Capital L.P.	432,561	$1.57M
683 Capital Management, LLC	248,000	$897.8K
StemPoint Capital LP	200,475	$725.7K
JPMorgan Chase & Co	178,532	$646.3K
Oxford Asset Management LLP	31,784	$115.1K
Diametric Capital, LP	29,812	$107.9K
Alpine Global Management, LLC	17,429	$63.1K
Man Group plc	15,248	$55.2K
Two Sigma Advisers, LP	12,250	$44.3K
Victory Capital Management Inc	10,138	$36.7K
BFSG, LLC	2,000	$7.24K
R Squared Ltd	870	$3.15K
National Bank of Canada	358	$1.30K
BNP Paribas Arbitrage, SA	2	$7