Mark Spoto - 14 Oct 2025 Form 4 Insider Report for 908 Devices Inc. (MASS)

Role: Director
Signature: /s/ Mark S. Levine, Attorney-in-Fact
Issuer symbol: MASS
Transactions as of: 14 Oct 2025
Net transactions value: $0
Form type: 4
Filing time: 03 Feb 2026, 20:45:21 UTC
Previous filing: 13 Jun 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Spoto Mark	Director	C/O 908 DEVICES INC., 44 3RD AVENUE, BURLINGTON	/s/ Mark S. Levine, Attorney-in-Fact	03 Feb 2026	0001836585

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	MASS	Common Stock	Will/Inheritance	$0	+928		$0.000000	928	14 Oct 2025	By spouse
transaction	MASS	Common Stock	Gift	$0	-928	-100%	$0.000000	0	30 Dec 2025	By spouse
transaction	MASS	Common Stock	Gift	$0	+928	+1.2%	$0.000000	75,263	30 Dec 2025	Direct
holding	MASS	Common Stock						3,599	14 Oct 2025	See footnote	F1

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	These securities are owned directly by Razor's Edge Ventures, LLC. The reporting person is a managing member of Razor's Edge Ventures, LLC and may be deemed to be the beneficial owner of the securities held by Razor's Edge Ventures, LLC. The reporting person disclaims beneficial ownership of the securities held by Razor's Edge Ventures, LLC except to the extent of his pecuniary interest therein.