aTYR PHARMA ATYR Institutional Ownership

NASDAQ ATYR

$0.46 -0.03 (-5.28%)

At close: Sep 9, 2026 · 4:00 PM EDT

Institutions by Trading Activity

91 Institutions

Increased 45 49.5%

Unchanged 15 16.5%

Reduced 31 34.1%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

39.81%

▼-17.97 pp QoQ

Shares Held by Institutions

39.04Mn

of 98.07Mn outstanding

▼-28.52% QoQ

Shares Outstanding

98.07Mn

59.03Mn held outside 13F filers

Institutional Investors

filed 13F for Jun 2026

▼-20 vs prior quarter

Net Shares Added (QoQ)

-15.57Mn

distributed since last quarter

Value of Holdings

$19.52Mn

reported market value

Shares Owned by Institutions

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Institutions

Accumulated Distributed

Latest quarter —

Net over range —

Accumulating quarters —

Ownership Summary

Quarter ending 30 Jun, 2026

aTYR PHARMA INC (NASDAQ:ATYR) appears in 91 institutional 13F filings for the quarter ending June 2026.

Their combined ownership stood at 39.8% of outstanding shares in June 2026, down from 57.8% in March 2026.
Their total shares held in ATYR decreased -28.52% quarter over quarter, and separately, investors owning aTYR PHARMA decreased 15.74% from a year ago.
Activity in ATYR broke down as 45 buyers, 31 sellers, and 15 unchanged among 91 total holders.
The aggregate institutional position in aTYR PHARMA amounted to 39.04Mn shares as of June 2026, down by 15.57Mn shares quarter on quarter, and down 27.66Mn shares year over year.
Federated Hermes, Inc. is the top holder of aTYR PHARMA as of June 30, 2026, with 8.51Mn shares representing 8.68% of outstanding stock.
Leading buyers of aTYR PHARMA shares for the quarter ending June 2026 were AQR CAPITAL MANAGEMENT LLC (2.11Mn), Kalehua Capital Management LLC (1.79Mn), GSA CAPITAL PARTNERS LLP (1.77Mn), JANE STREET GROUP, LLC (1.67Mn), CITADEL ADVISORS LLC (1.19Mn).
Leading sellers of aTYR PHARMA shares for the quarter ending June 2026 were FMR LLC (12.24Mn), BlackRock, Inc. (4.62Mn), UBS Group AG (2.34Mn), Federated Hermes, Inc. (2.0Mn), State Street Corp (1.26Mn).
Per Business Quant, the top 10 investors in ATYR for the quarter ending June 2026 include Federated Hermes, Inc. (8.51Mn), VANGUARD CAPITAL MANAGEMENT LLC (3.81Mn), GSA CAPITAL PARTNERS LLP (3.45Mn), AQR CAPITAL MANAGEMENT LLC (2.61Mn), FMR LLC (2.47Mn), BlackRock, Inc. (1.83Mn), Kalehua Capital Management LLC (1.79Mn), JANE STREET GROUP, LLC (1.72Mn), UBS Group AG (1.53Mn), Morgan Stanley (1.34Mn).

Form 13F Holdings

91 Institutional Holders

Report period 30 Jun, 2026

Total shares held 39.04Mn

Of outstanding 39.81%

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	Federated Hermes, Inc.	0001056288	8,509,678	8.68%	▼2,000,000	-19.03%	$5.08Mn
2	VANGUARD CAPITAL MANAGEMENT LLC	0002100119	3,808,091	3.88%	▼4,041	-0.11%	$2.27Mn
3	GSA CAPITAL PARTNERS LLP	0001362033	3,454,863	3.52%	▲1,770,277	+105.09%	$2.06K
4	AQR CAPITAL MANAGEMENT LLC	0001167557	2,610,548	2.66%	▲2,114,530	+426.30%	$1.56Mn
5	FMR LLC	0000315066	2,471,418	2.52%	▼12,235,425	-83.20%	$1.47Mn
6	BlackRock, Inc.	0002012383	1,827,332	1.86%	▼4,616,572	-71.64%	$1.09Mn
7	Kalehua Capital Management LLC	0002106181	1,788,167	1.82%	▲1,788,167	0.00%	$1.07Mn
8	JANE STREET GROUP, LLC	0001595888	1,721,297	1.76%	▲1,672,795	+3,448.92%	$1.03Mn
9	UBS Group AG	0001610520	1,531,151	1.56%	▼2,336,062	-60.41%	$914.10K
10	Morgan Stanley	0000895421	1,343,636	1.37%	▲118,169	+9.64%	$801.88K
11	TWO SIGMA INVESTMENTS, LP	0001179392	1,245,147	1.27%	▲100,582	+8.79%	$743.10K
12	CITADEL ADVISORS LLC	0001423053	1,242,067	1.27%	▲1,194,695	+2,521.94%	$741.27K
13	GEODE CAPITAL MANAGEMENT, LLC	0001214717	1,177,020	1.20%	▼1,208,465	-50.66%	$702.73K
14	SUSQUEHANNA INTERNATIONAL GROUP, LLP	0001446194	747,039	0.76%	▼119,705	-13.81%	$445.83K
15	MILLENNIUM MANAGEMENT LLC	0001273087	656,051	0.67%	▼985,195	-60.03%	$391.53K
16	Goldman Sachs Group Inc	0000886982	641,208	0.65%	▲357,972	+126.39%	$382.67K
17	VANGUARD FIDUCIARY TRUST CO	0000933478	576,125	0.59%	▼75,707	-11.61%	$343.95K
18	State Street Corp	0000093751	494,951	0.50%	▼1,259,448	-71.79%	$295.39K
19	MARSHALL WACE, LLP	0001318757	368,120	0.38%	▲230,002	+166.53%	$220.87K
20	XTX Topco Ltd	0001828301	226,678	0.23%	▲115,255	+103.44%	$135.28K

Showing 1 to 20 of 91 holders