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	$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

Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return

Federated Hermes Pittsburgh, Pennsylvania $61.5B AUM 30.7% 1-Year Est. Return

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

UBS Group Zurich, Switzerland $666B AUM 30.12% 1-Year Est. Return

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

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 New York $240B AUM 35.51% 1-Year Est. Return

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.