Ken Griffin
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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 		– Sell
-22,600
Closed -$119K – 13702
2025
Q4 		$119K Sell
22,600
-17,300
-43% -$121K ﹤0.01% 11502
2025
Q3 		$350K Buy
39,900
+13,900
+53% +$92.4K ﹤0.01% 10006
2025
Q2 		$185K Buy
26,000
+2,800
+12% +$15.6K ﹤0.01% 10746
2025
Q1 		$104K Buy
23,200
+22,700
+4,540% +$67.2K ﹤0.01% 11404
2024
Q4 		$1.1K Sell
500
-13,600
-96% -$38.9K ﹤0.01% 14224
2024
Q3 		$48.9K Buy
14,100
+13,300
+1,663% +$59K ﹤0.01% 11942
2024
Q2 		$4.12K Sell
800
-13,900
-95% -$83.9K ﹤0.01% 13515
2024
Q1 		$111K Buy
14,700
+1,700
+13% +$12.6K ﹤0.01% 11206
2023
Q4 		$146K Sell
13,000
-5,400
-29% -$36.9K ﹤0.01% 10431
2023
Q3 		$123K Buy
18,400
+9,600
+109% +$66.5K ﹤0.01% 10638
2023
Q2 		$60.4K Buy
8,800
+5,900
+203% +$47.4K ﹤0.01% 11582
2023
Q1 		$24.9K Buy
2,900
+900
+45% +$8.03K ﹤0.01% 12892
2022
Q4 		$15.2K Sell
2,000
-14,600
-88% -$177K ﹤0.01% 13340
2022
Q3 		$273K Sell
16,600
-22,900
-58% -$445K ﹤0.01% 9772
2022
Q2 		$813K Sell
39,500
-13,000
-25% -$218K ﹤0.01% 7506
2022
Q1 		$998K Buy
52,500
+29,000
+123% +$499K ﹤0.01% 7696
2021
Q4 		$608K Buy
23,500
+10,000
+74% +$294K ﹤0.01% 9198
2021
Q3 		$439K Buy
+13,500
New +$459K ﹤0.01% 10197

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 $1.88T AUM 44.46% 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.