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
Q2 		$10.3K Sell
17,300
-67,800
-80% -$44.3K ﹤0.01% 6378
2026
Q1 		$66.4K Buy
85,100
+11,300
+15% +$9.54K ﹤0.01% 5056
2025
Q4 		$57.8K Sell
73,800
-297,200
-80% -$244K ﹤0.01% 5484
2025
Q3 		$268K Buy
371,000
+336,600
+978% +$1.53M ﹤0.01% 4357
2025
Q2 		$174K Sell
34,400
-139,200
-80% -$548K ﹤0.01% 4476
2025
Q1 		$524K Buy
+173,600
New +$633K ﹤0.01% 3039
2023
Q3 		– Sell
-2,200
Closed -$4.75K – 8424
2023
Q2 		$4.75K Buy
+2,200
New +$4.8K ﹤0.01% 6741
2022
Q4 		– Sell
-22,600
Closed -$68K – 8234
2022
Q3 		$68K Buy
22,600
+5,700
+34% +$19.1K ﹤0.01% 5145
2022
Q2 		$48K Sell
16,900
-7,300
-30% -$26.4K ﹤0.01% 5594
2022
Q1 		$129K Buy
24,200
+13,500
+126% +$76.5K ﹤0.01% 5252
2021
Q4 		$80K Buy
10,700
+3,400
+47% +$28.4K ﹤0.01% 5929
2021
Q3 		$66K Buy
+7,300
New +$43.7K ﹤0.01% 6319

Other funds holding ATYR

Federated Hermes
Federated Hermes Pittsburgh, Pennsylvania $69.6B AUM 42.52% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
GCP
GSA Capital Partners London, United Kingdom $1.59B AUM 39.81% 1-Year Est. Return
AQR Capital Management
AQR Capital Management Greenwich, Connecticut $287B AUM 42.33% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
KCM
Kalehua Capital Management Dallas, Texas $174M AUM
Jane Street
Jane Street New York $1.21T AUM 78.12% 1-Year Est. Return
UBS Group
UBS Group Zurich, Switzerland $786B AUM 40.34% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return

Group One Trading's ATYR Position: Q2 2026 in Review

Group One Trading reduced its aTyr Pharma (ATYR) stake by 25% in Q2 2026, selling an estimated $29.5K and leaving 138,878 shares worth $82.9K. The position accounts for ﹤0.01% of the portfolio, ranked #5007.

Group One Trading first reported a position in ATYR in Q2 2018 and has held it in 23 quarters since. The position peaked at $359K in Q2 2025. 89 funds tracked by Wall St. Rank hold ATYR as of Q2 2026.

  • Group One Trading held 138,878 shares of aTyr Pharma worth $82.9K as of Q2 2026.
  • Group One Trading sold 45,136 aTyr Pharma shares in Q2 2026, an estimated $29.5K.
  • aTyr Pharma made up ﹤0.01% of Group One Trading's portfolio in Q2 2026, its #5007 holding.
  • Group One Trading first reported a position in aTyr Pharma in Q2 2018 and has held it in 23 quarters since.
  • Group One Trading's aTyr Pharma position peaked at $359K in Q2 2025.
  • 89 funds tracked by Wall St. Rank held aTyr Pharma as of Q2 2026.

Based on Group One Trading's 13F filing for Q2 2026, filed 14 Aug 2026.