aTYR PHARMA INC (ATYR) Institutional Ownership

Institutions by Trading Activity

0Shares Outstanding

20,084,244Shares held by institutions

$14,782,004Value of institutional holdings

74.01%Institutional ownership %

-9.06%Shares Changed QoQ

108No. of institutional investors

aTYR PHARMA INC (NASDAQ:ATYR) showed up in the 13F filings of 80 institutional investors as of December 2025.

These investors held 56.5% of outstanding shares in December 2025, down from 64.1% in September 2025.
They decreased total shares held in ATYR by -2.22% quarter over quarter, and investors in aTYR PHARMA increased 2.56% from a year ago.
Among the 80 funds, 38 bought more aTYR PHARMA shares, 25 sold down, and 17 held their ground.
In total, institutional investors held 54.85Mn shares in aTYR PHARMA as of December 2025, down by 1.25Mn shares quarter on quarter, and down 156.55K shares year over year.
FMR LLC is the top holder of aTYR PHARMA as of December 31, 2025, with 14.7Mn shares representing 15.13% of outstanding stock.
The biggest buyers of aTYR PHARMA for the quarter ending December 2025 included GSA CAPITAL PARTNERS LLP (1.92Mn), TWO SIGMA ADVISERS, LP (841.35K), AQR CAPITAL MANAGEMENT LLC (769.82K), Morgan Stanley (692.67K), SUSQUEHANNA INTERNATIONAL GROUP, LLP (638.07K).
The biggest sellers of aTYR PHARMA for the quarter ending December 2025 included UBS Group AG (2.88Mn), State Street Corp (2.47Mn), VANGUARD GROUP INC (669.06K), Goldman Sachs Group Inc (342.58K), Bank Of America Corp /De/ (228.64K).
aTYR PHARMA's 10 largest shareholders as of December 2025 include FMR LLC (14.7Mn), Federated Hermes, Inc. (10.51Mn), BlackRock, Inc. (6.55Mn), VANGUARD GROUP INC (4.96Mn), GSA CAPITAL PARTNERS LLP (2.63Mn), GEODE CAPITAL MANAGEMENT, LLC (2.28Mn), State Street Corp (1.72Mn), UBS Group AG (1.63Mn), Morgan Stanley (1.4Mn), Rosalind Advisors, Inc. (1.04Mn) per Business Quant data.

20,084,244 Total Shares Held

Rows:

Owner Name	Date	Change (QoQ)	Change (%)	Value (USD)
BlackRock, Inc.	31 Dec, 2025	75,815	1.17%	$0.00
FMR LLC	31 Dec, 2025	0	0.00%	$0.00
UBS Group AG	31 Dec, 2025	-2,880,658	-63.93%	$0.00
Barclays Plc	31 Dec, 2025	-167,177	-48.97%	$0.00
Federated Hermes, Inc.	31 Dec, 2025	-34,759	-0.33%	$0.00
Rosalind Advisors, Inc.	31 Dec, 2025	0	0.00%	$0.00
Rockefeller Capital Management L.P.	31 Dec, 2025	28,118	100.00%	$0.00
VANGUARD GROUP INC	31 Dec, 2025	-669,064	-11.88%	$0.00
Tikvah Management LLC	31 Dec, 2025	0	0.00%	$0.00
HSBC HOLDINGS PLC	31 Dec, 2025	16,133	99.96%	$0.00
GSA CAPITAL PARTNERS LLP	31 Dec, 2025	1,923,907	272.23%	$0.00
Nuveen, LLC	31 Dec, 2025	0	0.00%	$0.00
GEODE CAPITAL MANAGEMENT, LLC	31 Dec, 2025	105,514	4.84%	$0.00
ADAR1 Capital Management, LLC	31 Dec, 2025	-73,630	-42.07%	$0.00
State Street Corp	31 Dec, 2025	-2,471,323	-58.89%	$0.00
XTX Topco Ltd	31 Dec, 2025	79,365	0.00%	$0.00
Morgan Stanley	31 Dec, 2025	692,668	97.51%	$0.00
KINGSWOOD WEALTH ADVISORS, LLC	31 Dec, 2025	52,000	0.00%	$0.00
TWO SIGMA ADVISERS, LP	31 Dec, 2025	841,350	0.00%	$0.00
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.	31 Dec, 2025	-7,678	-15.50%	$0.00

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