Director tied to 908 Devices (MASS) logs family share gift and LLC stake

Rhea-AI Filing Summary

Director Mark Spoto of 908 Devices Inc. reported family-related movements of common stock. On 10/14/2025, 928 shares were acquired at $0 and held indirectly through his spouse. On 12/30/2025, 928 shares were reported as a gift from his spouse, leaving 928 shares no longer held indirectly and 928 shares counted as directly owned, with a total of 75,263 common shares shown as directly held afterward. The filing also shows 3,599 common shares held indirectly through Razor's Edge Ventures, LLC, an entity where Spoto is a managing member and for which he disclaims beneficial ownership beyond his pecuniary interest.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Spoto Mark

(Last) (First) (Middle)

C/O 908 DEVICES INC.

44 3RD AVENUE

(Street)

BURLINGTON MA 01803

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
908 Devices Inc. [ MASS ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
10/14/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	10/14/2025		W		928	A	$0	928	I	By spouse
Common Stock	12/30/2025		G		928	D	$0	0	I	By spouse
Common Stock	12/30/2025		G		928	A	$0	75,263	D
Common Stock								3,599	I	See footnote(1)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. 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.

	/s/ Mark S. Levine, Attorney-in-Fact	02/03/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What insider activity did Mark Spoto report at 908 Devices (MASS)?

Director Mark Spoto reported family-related movements of common stock. Indirect holdings of 928 shares via his spouse were gifted and reclassified, and he reported 75,263 shares directly held plus 3,599 shares indirectly held through Razor's Edge Ventures, LLC with a beneficial ownership disclaimer.

How many 908 Devices (MASS) shares does Mark Spoto directly hold after this Form 4?

After the reported transactions, the filing shows Mark Spoto with 75,263 shares of 908 Devices common stock held directly. This reflects the reclassification of 928 shares previously held indirectly through his spouse into his direct ownership as of the reported dates.

What is the significance of the 928-share transactions in the 908 Devices (MASS) Form 4?

The 928-share entries reflect a family-related movement of shares. First, 928 shares were held indirectly through Spoto’s spouse, then a gift of 928 shares was reported, leaving zero indirectly held by the spouse and contributing to 75,263 shares reported as directly owned afterward.

How are Razor's Edge Ventures, LLC holdings reported for 908 Devices (MASS)?

The Form 4 shows 3,599 908 Devices common shares held indirectly through Razor's Edge Ventures, LLC. Spoto is a managing member and may be deemed a beneficial owner, but he disclaims beneficial ownership beyond his pecuniary interest in that entity’s holdings.

What do the Form 4 transaction codes W and G mean for 908 Devices (MASS)?

Code W indicates a transaction related to derivative or similar rights being settled into common stock, reported here as 928 shares at $0 held by Spoto’s spouse. Code G indicates a gift, recording transfer of 928 shares at $0 from his spouse and updating his reported ownership.

Is Mark Spoto considered an insider of 908 Devices (MASS) in this filing?

Yes. The Form 4 identifies Mark Spoto as a director of 908 Devices Inc., making him a Section 16 insider. The filing reports his direct and indirect beneficial ownership, including shares held via his spouse and via Razor's Edge Ventures, LLC with a stated ownership disclaimer.