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
2026 Q2	$99.6K	Sell	11,445 -2,856	-20%	-$21.9K	﹤0.01%	10599
2026 Q1	$87.5K	Sell	14,301 -22,494	-61%	-$141K	﹤0.01%	10710
2025 Q4	$193K	Buy	+36,795	New	+$257K	﹤0.01%	9752
2025 Q3	–	Sell	-47,850	Closed	-$341K	–	11373
2025 Q2	$341K	Buy	+47,850	New	+$266K	﹤0.01%	7632
2025 Q1	–	Sell	-113,890	Closed	-$251K	–	10135
2024 Q4	$251K	Buy	113,890 +61,851	+119%	+$177K	﹤0.01%	8035
2024 Q3	$181K	Sell	52,039 -34,419	-40%	-$153K	﹤0.01%	8714
2024 Q2	$445K	Buy	86,458 +50,263	+139%	+$304K	﹤0.01%	7209
2024 Q1	$273K	Buy	36,195 +22,695	+168%	+$168K	﹤0.01%	7702
2023 Q4	$151K	Sell	13,500 -14,798	-52%	-$101K	﹤0.01%	8387
2023 Q3	$188K	Buy	28,298 +10,065	+55%	+$69.7K	﹤0.01%	7670
2023 Q2	$125K	Sell	18,233 -35,470	-66%	-$285K	﹤0.01%	7900
2023 Q1	$462K	Buy	+53,703	New	+$479K	﹤0.01%	6455
2022 Q3	–	Sell	-18,368	Closed	-$357K	–	10132
2022 Q2	$378K	Buy	+18,368	New	+$309K	﹤0.01%	7216
2021 Q4	–	Sell	-58,526	Closed	-$1.72M	–	10521
2021 Q3	$1.9M	Buy	+58,526	New	+$1.99M	﹤0.01%	4576
2021 Q1	–	Sell	-13,442	Closed	-$766K	–	9393
2020 Q4	$766K	Buy	+13,442	New	+$785K	﹤0.01%	5097

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 $59.9B AUM 27.01% 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 $3.37T AUM 44.26% 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. 105 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.
105 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.