Jane Street’s Atossa Therapeutics ATOS Stock Holding History

Jane Street’s Portfolio ATOS Stock Details ATOS Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	–	Sell	-2,700	Closed	-$23.9K	–	11534
2025 Q4	$23.9K	Buy	+2,700	New	+$34.1K	﹤0.01%	10692
2022 Q3	–	Sell	-1,800	Closed	-$29K	–	9661
2022 Q2	$29K	Sell	1,800 -3,253	-64%	-$51.3K	﹤0.01%	9067
2022 Q1	$95K	Sell	5,053 -51,800	-91%	-$1.05M	﹤0.01%	9479
2021 Q4	$1.36M	Sell	56,853 -49,174	-46%	-$1.8M	﹤0.01%	5284
2021 Q3	$5.18M	Sell	106,027 -94,653	-47%	-$5.51M	﹤0.01%	2653
2021 Q2	$19M	Buy	200,680 +162,740	+429%	+$8.62M	0.01%	1107
2021 Q1	$1.2M	Buy	+37,940	New	+$1.39M	﹤0.01%	5103

Other funds holding ATOS

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

Ameriprise Minneapolis, Minnesota $495B AUM 43.24% 1-Year Est. Return

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

Renaissance Technologies New York $72.6B AUM 54.88% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

UBS Group Zurich, Switzerland $786B AUM 40.34% 1-Year Est. Return

Vanguard Fiduciary Trust Malvern, Pennsylvania $454B AUM

Millennium Management New York $276B AUM 44.8% 1-Year Est. Return

State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

Northern Trust Chicago, Illinois $860B AUM 41.15% 1-Year Est. Return

Jane Street's ATOS Position: Q2 2026 in Review

Jane Street opened a new position in Atossa Therapeutics (ATOS) in Q2 2026: 56,602 shares worth $109K. The stake represents ﹤0.01% of the portfolio and ranks #10542 among its holdings. This is a return to the name: Jane Street previously reported a position in ATOS as recently as Q4 2025.

Jane Street first reported a position in ATOS in Q3 2013 and has held it in 23 quarters since. The position peaked at $8.37M in Q2 2021. 31 funds tracked by Wall St. Rank hold ATOS as of Q2 2026.

Jane Street held 56,602 shares of Atossa Therapeutics worth $109K as of Q2 2026.
Atossa Therapeutics was a new Jane Street position in Q2 2026.
Atossa Therapeutics made up ﹤0.01% of Jane Street's portfolio in Q2 2026, its #10542 holding.
Jane Street first reported a position in Atossa Therapeutics in Q3 2013 and has held it in 23 quarters since.
Jane Street's Atossa Therapeutics position peaked at $8.37M in Q2 2021.
31 funds tracked by Wall St. Rank held Atossa Therapeutics as of Q2 2026.

Based on Jane Street's 13F filing for Q2 2026, filed 14 Aug 2026.