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 		$144K Sell
184,014
-7,034
-4% -$5.94K ﹤0.01% 4404
2025
Q4 		$150K Buy
191,048
+173,808
+1,008% +$143K ﹤0.01% 4636
2025
Q3 		$12.4K Sell
17,240
-53,527
-76% -$243K ﹤0.01% 7040
2025
Q2 		$359K Sell
70,767
-18,904
-21% -$74.4K ﹤0.01% 3751
2025
Q1 		$271K Buy
89,671
+82,431
+1,139% +$301K ﹤0.01% 3713
2024
Q4 		$26.2K Buy
+7,240
New +$21.9K ﹤0.01% 5520
2022
Q4 		– Sell
-14,461
Closed -$34.1K – 8233
2022
Q3 		$43K Buy
14,461
+8,813
+156% +$29.5K ﹤0.01% 5529
2022
Q2 		$16K Buy
+5,648
New +$20.4K ﹤0.01% 6478
2021
Q4 		– Sell
-2,022
Closed -$16.9K – 8949
2021
Q3 		$18K Buy
2,022
+1,979
+4,602% +$11.8K ﹤0.01% 7244
2021
Q2 		$0 Hold
43
– – ﹤0.01% 8649
2021
Q1 		$0 Hold
43
– – ﹤0.01% 8106
2020
Q4 		$0 Hold
43
– – ﹤0.01% 7087
2020
Q3 		$0 Hold
43
– – ﹤0.01% 6614
2020
Q2 		$0 Hold
43
– – ﹤0.01% 6265
2020
Q1 		$0 Hold
43
– – ﹤0.01% 5827
2019
Q4 		$0 Hold
43
– – ﹤0.01% 5710
2019
Q3 		$0 Hold
43
– – ﹤0.01% 5631
2019
Q2 		$0 Buy
43
+36
+514% +$244 ﹤0.01% 5465
2019
Q1 		$0 Hold
7
– – ﹤0.01% 5456
2018
Q4 		$0 Hold
7
– – ﹤0.01% 5498
2018
Q3 		$0 Hold
7
– – ﹤0.01% 5677
2018
Q2 		$0 Buy
+7
New +$166 ﹤0.01% 5546

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.