Jane Street’s 908 Devices MASS Stock Holding History

Jane Street’s Portfolio MASS Stock Details MASS Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2022 Q4	–	Sell	-41,500	Closed	-$683K	–	9717
2022 Q3	$683K	Buy	41,500 +1,500	+4%	+$29.1K	﹤0.01%	6105
2022 Q2	$824K	Buy	+40,000	New	+$672K	﹤0.01%	5837
2022 Q1	–	Sell	-48,000	Closed	-$1.24M	–	10722
2021 Q4	$1.24M	Sell	48,000 -64,200	-57%	-$1.89M	﹤0.01%	5465
2021 Q3	$3.65M	Buy	+112,200	New	+$3.81M	﹤0.01%	3287

Other funds holding MASS

FLAM

First Light Asset Management Edina, Minnesota $1.65B AUM 203.21% 1-Year Est. Return

AIC

AWM Investment Company New York $1.15B AUM 201.65% 1-Year Est. Return

AIM

ARK Investment Management St. Petersburg, Florida $15.4B AUM 50.29% 1-Year Est. Return

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

NIM

Needham Investment Management New York $3.33B AUM 163.16% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

First Eagle Investment Management New York $60.8B AUM 26.63% 1-Year Est. Return

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

GIM

Granahan Investment Management Waltham, Massachusetts $2.81B AUM 83.9% 1-Year Est. Return

State Street Boston, Massachusetts $3.38T AUM 44.17% 1-Year Est. Return

Jane Street's MASS Position: Q2 2026 in Review

Jane Street reduced its 908 Devices (MASS) stake by 20% in Q2 2026, selling an estimated $21.9K and leaving 11,445 shares worth $99.6K. The position accounts for ﹤0.01% of the portfolio, ranked #10599.

Jane Street first reported a position in MASS in Q4 2020 and has held it in 15 quarters since. The position peaked at $1.9M in Q3 2021. 111 funds tracked by Wall St. Rank hold MASS as of Q2 2026.

Jane Street held 11,445 shares of 908 Devices worth $99.6K as of Q2 2026.
Jane Street sold 2,856 908 Devices shares in Q2 2026, an estimated $21.9K.
908 Devices made up ﹤0.01% of Jane Street's portfolio in Q2 2026, its #10599 holding.
Jane Street first reported a position in 908 Devices in Q4 2020 and has held it in 15 quarters since.
Jane Street's 908 Devices position peaked at $1.9M in Q3 2021.
111 funds tracked by Wall St. Rank held 908 Devices as of Q2 2026.

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