Group One Trading
ATYR

Group One Trading’s aTyr Pharma ATYR Stock Holding History

Group One Trading’s Portfolio ATYR Stock Details ATYR Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$118K Sell
150,800
-74,300
-33% -$62.7K ﹤0.01% 4590
2025
Q4 		$176K Sell
225,100
-53,800
-19% -$44.2K ﹤0.01% 4490
2025
Q3 		$201K Buy
278,900
+70,000
+34% +$317K ﹤0.01% 4659
2025
Q2 		$1.06M Buy
208,900
+195,200
+1,425% +$768K ﹤0.01% 2716
2025
Q1 		$41.4K Buy
+13,700
New +$50K ﹤0.01% 5300
2024
Q2 		– Sell
-100
Closed -$195 – 7620
2024
Q1 		$195 Sell
100
-1,100
-92% -$1.92K ﹤0.01% 6810
2023
Q4 		$1.69K Sell
1,200
-11,400
-90% -$14.6K ﹤0.01% 6873
2023
Q3 		$19.9K Sell
12,600
-5,100
-29% -$9.44K ﹤0.01% 5883
2023
Q2 		$38.2K Buy
17,700
+17,100
+2,850% +$37.3K ﹤0.01% 5484
2023
Q1 		$1.26K Sell
600
-1,800
-75% -$3.94K ﹤0.01% 6733
2022
Q4 		$5.26K Buy
2,400
+500
+26% +$1.18K ﹤0.01% 6326
2022
Q3 		$6K Buy
+1,900
New +$6.37K ﹤0.01% 6785
2022
Q2 		– Sell
-3,600
Closed -$19K – 8655
2022
Q1 		$19K Buy
3,600
+2,200
+157% +$12.5K ﹤0.01% 6792
2021
Q4 		$10K Sell
1,400
-46,100
-97% -$385K ﹤0.01% 7365
2021
Q3 		$431K Buy
+47,500
New +$284K ﹤0.01% 4360

Other funds holding ATYR

Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
Federated Hermes
Federated Hermes Pittsburgh, Pennsylvania $61.5B AUM 30.7% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
UBS Group
UBS Group Zurich, Switzerland $666B AUM 30.12% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
GCP
GSA Capital Partners London, United Kingdom $1.61B AUM 28.28% 1-Year Est. Return
Millennium Management
Millennium Management New York $240B AUM 35.51% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return

Group One Trading's ATYR Position: Q1 2026 in Review

Group One Trading reduced its aTyr Pharma (ATYR) stake by 3.7% in Q1 2026, selling an estimated $5.94K and leaving 184,014 shares worth $144K. The position accounts for ﹤0.01% of the portfolio, ranked #4404.

Group One Trading first reported a position in ATYR in Q2 2018 and has held it in 22 quarters since. The position peaked at $359K in Q2 2025. 111 funds tracked by Wall St. Rank hold ATYR as of Q1 2026.

  • Group One Trading held 184,014 shares of aTyr Pharma worth $144K as of Q1 2026.
  • Group One Trading sold 7,034 aTyr Pharma shares in Q1 2026, an estimated $5.94K.
  • aTyr Pharma made up ﹤0.01% of Group One Trading's portfolio in Q1 2026, its #4404 holding.
  • Group One Trading first reported a position in aTyr Pharma in Q2 2018 and has held it in 22 quarters since.
  • Group One Trading's aTyr Pharma position peaked at $359K in Q2 2025.
  • 111 funds tracked by Wall St. Rank held aTyr Pharma as of Q1 2026.

Based on Group One Trading's 13F filing for Q1 2026, filed 13 May 2026.