Ken Griffin
MASS icon

Ken Griffin’s 908 Devices MASS Stock Holding History

Ken Griffin’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
Q1 		$885K Sell
144,547
-119,826
-45% -$751K ﹤0.01% 7947
2025
Q4 		$1.39M Buy
+264,373
New +$1.85M ﹤0.01% 6683
2025
Q1 		– Sell
-197,183
Closed -$584K – 15139
2024
Q4 		$434K Sell
197,183
-19,946
-9% -$57.1K ﹤0.01% 8876
2024
Q3 		$753K Buy
217,129
+47,853
+28% +$212K ﹤0.01% 7406
2024
Q2 		$872K Buy
169,276
+120,450
+247% +$727K ﹤0.01% 6866
2024
Q1 		$369K Sell
48,826
-5,037
-9% -$37.3K ﹤0.01% 9023
2023
Q4 		$604K Buy
53,863
+19,109
+55% +$131K ﹤0.01% 7684
2023
Q3 		$231K Buy
34,754
+20,030
+136% +$139K ﹤0.01% 9641
2023
Q2 		$101K Buy
14,724
+5,818
+65% +$46.8K ﹤0.01% 10922
2023
Q1 		$76.6K Sell
8,906
-21,619
-71% -$193K ﹤0.01% 11615
2022
Q4 		$233K Buy
30,525
+17,399
+133% +$211K ﹤0.01% 9830
2022
Q3 		$216K Buy
+13,126
New +$255K ﹤0.01% 10259
2022
Q1 		– Sell
-22,868
Closed -$393K – 14181
2021
Q4 		$592K Buy
+22,868
New +$673K ﹤0.01% 9263

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
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
First Eagle Investment Management New York $59.9B AUM 27.01% 1-Year Est. Return
Geode Capital Management
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
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

Ken Griffin's MASS Position: Q1 2026 in Review

Ken Griffin reduced its 908 Devices (MASS) stake by 45% in Q1 2026, selling an estimated $751K and leaving 144,547 shares worth $885K. The position accounts for ﹤0.01% of the portfolio, ranked #7947.

Ken Griffin first reported a position in MASS in Q4 2021 and has held it in 13 quarters since. The position peaked at $1.39M in Q4 2025. 112 funds tracked by Wall St. Rank hold MASS as of Q1 2026.

  • Ken Griffin held 144,547 shares of 908 Devices worth $885K as of Q1 2026.
  • Ken Griffin sold 119,826 908 Devices shares in Q1 2026, an estimated $751K.
  • 908 Devices made up ﹤0.01% of Ken Griffin's portfolio in Q1 2026, its #7947 holding.
  • Ken Griffin first reported a position in 908 Devices in Q4 2021 and has held it in 13 quarters since.
  • Ken Griffin's 908 Devices position peaked at $1.39M in Q4 2025.
  • 112 funds tracked by Wall St. Rank held 908 Devices as of Q1 2026.

Based on Citadel Advisors's 13F filing for Q1 2026, filed 15 May 2026.