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 $1.12B AUM 114.45% 1-Year Est. Return

AIC

AWM Investment Company New York $903M AUM 163.47% 1-Year Est. Return

AIM

ARK Investment Management St. Petersburg, Florida $12.9B AUM 64.92% 1-Year Est. Return

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

NIM

Needham Investment Management New York $1.96B AUM 101.23% 1-Year Est. Return

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

First Eagle Investment Management New York $59.9B AUM 27.01% 1-Year Est. Return

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

GIM

Granahan Investment Management Waltham, Massachusetts $2.07B AUM 56.45% 1-Year Est. Return

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

Jane Street's MASS Position: Q1 2026 in Review

Jane Street reduced its 908 Devices (MASS) stake by 61% in Q1 2026, selling an estimated $141K and leaving 14,301 shares worth $87.5K. The position accounts for ﹤0.01% of the portfolio, ranked #10710.

Jane Street first reported a position in MASS in Q4 2020 and has held it in 14 quarters since. The position peaked at $1.9M in Q3 2021. 112 funds tracked by Wall St. Rank hold MASS as of Q1 2026.

Jane Street held 14,301 shares of 908 Devices worth $87.5K as of Q1 2026.
Jane Street sold 22,494 908 Devices shares in Q1 2026, an estimated $141K.
908 Devices made up ﹤0.01% of Jane Street's portfolio in Q1 2026, its #10710 holding.
Jane Street first reported a position in 908 Devices in Q4 2020 and has held it in 14 quarters since.
Jane Street's 908 Devices position peaked at $1.9M in Q3 2021.
112 funds tracked by Wall St. Rank held 908 Devices as of Q1 2026.

Based on Jane Street's 13F filing for Q1 2026, filed 12 May 2026.