908 Devices Inc. (MASS) - 13D/13G Filings

Real time Form 13D and 13G transaction reports:

  • Schedule 13D must be filed within ten days after a person or an organization acquires beneficial ownership of more than 5% of a voting class of a company's equity securities.
  • Due to inconsistent filing format, it is highly recommended that you read the orignal filing form.
  • Shares have beem adjusted for stock split.
"Insiders might sell their shares for any number of reasons, but they buy them for only one: they think the price will rise"
- Peter Lynch
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Reported
DateTime
Transaction
Date
TypeCompany
Symbol
Filed By
Symbol
Shares Owned
% Owned
Shares Vs. Prev ReportView
2026-08-14
4:05 pm
Purchase
2026-06-3013G908 DEVICES INC
MASS
ARCH Venture Fund VII, L.P.5,824,877
14.100%
15,661increase
(+0.27%)
Filing
History
2026-08-14
2:59 pm
Purchase
2026-06-3013G908 DEVICES INC
MASS
ARK Investment Management LLC2,027,920
5.320%
144,714increase
(+7.68%)
Filing
History
2026-08-14
2:58 pm
Sale
2026-06-3013G908 DEVICES INC
MASS
AWM Investment Company Inc.4,879,773
11.800%
-320,151decrease
(-6.16%)
Filing
History
2026-07-27
4:25 pm
Purchase
2026-06-3013G908 DEVICES INC
MASS
BlackRock, Inc.
BLK
1,940,690
5.100%
326,676increase
(+20.24%)
Filing
History
2026-06-05
3:39 pm
Sale
2026-05-3113G908 DEVICES INC
MASS
ARK Investment Management LLC1,883,206
4.940%
-70,566decrease
(-3.61%)
Filing
History
2026-05-15
4:05 pm
Purchase
2026-03-3113G908 DEVICES INC
MASS
ARCH Venture Fund VII, L.P.5,809,216
15.300%
26,668increase
(+0.46%)
Filing
History
2026-02-17
4:35 pm
Purchase
2025-12-3113G908 DEVICES INC
MASS
First Light Asset Management, LLC6,184,739
17.090%
1,503,880increase
(+32.13%)
Filing
History
2026-02-09
06:14 am
Sale
2025-12-3113G908 DEVICES INC
MASS
STATE STREET CORP
STT
596,294
1.600%
-1,690,340decrease
(-73.92%)
Filing
History
2025-12-05
4:32 pm
Purchase
2025-11-3013G908 DEVICES INC
MASS
First Light Asset Management, LLC4,680,859
12.930%
1,118,602increase
(+31.40%)
Filing
History
2025-11-14
4:37 pm
Purchase
2025-09-3013G908 DEVICES INC
MASS
First Light Asset Management, LLC3,562,257
9.840%
3,562,257increase
(New Position)
Filing
History
2025-11-04
4:46 pm
Sale
2025-09-3013G908 DEVICES INC
MASS
ARK Investment Management LLC1,953,772
5.410%
-834,793decrease
(-29.94%)
Filing
History
2025-08-11
06:39 am
Purchase
2025-06-3013G908 DEVICES INC
MASS
STATE STREET CORP
STT
2,286,634
6.400%
2,286,634increase
(New Position)
Filing
History
2025-05-15
10:52 am
Sale
2025-03-3113G908 DEVICES INC
MASS
Ameriprise Financial, Inc.
AMP
316
0.000%
-1,889,311decrease
(-99.98%)
Filing
History
2025-04-25
4:03 pm
Sale
2025-03-3113G908 DEVICES INC
MASS
BlackRock, Inc.
BLK
1,614,014
4.600%
-270,466decrease
(-14.35%)
Filing
History
2025-04-07
4:18 pm
Purchase
2025-03-3113G908 DEVICES INC
MASS
AWM Investment Company Inc.5,199,924
14.700%
5,199,924increase
(New Position)
Filing
History
2025-02-14
11:23 am
Sale
2024-12-3113G908 DEVICES INC
MASS
ARK Investment Management LLC2,788,565
8.010%
-430,984decrease
(-13.39%)
Filing
History
2025-01-30
8:09 pm
Sale
2024-12-3113G908 DEVICES INC
MASS
VANGUARD GROUP INC1,324,534
3.800%
-419,796decrease
(-24.07%)
Filing
History
2025-01-10
9:23 pm
Sale
2024-09-3013G908 DEVICES INC
MASS
ARK Investment Management LLC3,219,549
9.290%
-1,127,030decrease
(-25.93%)
Filing
History
2024-11-14
5:11 pm
Purchase
2024-09-3013G908 DEVICES INC
MASS
ARCH Venture Fund VII, L.P.5,782,548
16.600%
26,106increase
(+0.45%)
Filing
History
2024-11-14
4:25 pm
Sale
2024-09-3013G908 DEVICES INC
MASS
Granahan Investment Management LLC861,433
2.490%
-1,177,225decrease
(-57.75%)
Filing
History
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