EIM
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Essex Investment Management’s 908 Devices MASS Stock Holding History

Essex Investment Management’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 		$4.09M Sell
470,244
-20,977
-4% -$161K 0.54% 71
2026
Q1 		$3.01M Buy
491,221
+8,607
+2% +$53.9K 0.48% 82
2025
Q4 		$2.53M Sell
482,614
-11,335
-2% -$79.2K 0.39% 100
2025
Q3 		$4.33M Buy
493,949
+16,607
+3% +$110K 0.66% 49
2025
Q2 		$3.4M Sell
477,342
-3,207
-0.7% -$17.8K 0.62% 54
2025
Q1 		$2.15M Buy
+480,549
New +$1.42M 0.45% 98

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
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
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
First Eagle Investment Management
First Eagle Investment Management New York $60.8B AUM 26.63% 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 $2.81B AUM 83.9% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

Essex Investment Management's MASS Position: Q2 2026 in Review

Essex Investment Management reduced its 908 Devices (MASS) stake by 4.3% in Q2 2026, selling an estimated $161K and leaving 470,244 shares worth $4.09M. The position accounts for 0.54% of the portfolio, ranked #71.

Essex Investment Management first reported a position in MASS in Q1 2025 and has held it in 6 quarters since. The position peaked at $4.33M in Q3 2025. 112 funds tracked by Wall St. Rank hold MASS as of Q2 2026.

  • Essex Investment Management held 470,244 shares of 908 Devices worth $4.09M as of Q2 2026.
  • Essex Investment Management sold 20,977 908 Devices shares in Q2 2026, an estimated $161K.
  • 908 Devices made up 0.54% of Essex Investment Management's portfolio in Q2 2026, its #71 holding.
  • Essex Investment Management first reported a position in 908 Devices in Q1 2025 and has held it in 6 quarters since.
  • Essex Investment Management's 908 Devices position peaked at $4.33M in Q3 2025.
  • 112 funds tracked by Wall St. Rank held 908 Devices as of Q2 2026.

Based on Essex Investment Management's 13F filing for Q2 2026, filed 6 Aug 2026.