[Form 3] 908 Devices Inc. Initial Statement of Beneficial Ownership

Rhea-AI Filing Summary

908 Devices Inc. (MASS) Form 3 records that Brandi C. Vann is reported as a director with an event date of 08/01/2025. The filing states no securities are beneficially owned and notes the form was filed late due to an inadvertent administrative error. The form is signed by an attorney-in-fact on 08/18/2025.

Positive

• Director appointment disclosed for Brandi C. Vann on 08/01/2025
• No beneficial ownership declared, removing immediate insider trading concerns

Negative

• Late filing acknowledged due to an administrative error
• No shares owned means the director currently has no direct economic stake

SEC Form 3

FORM 3

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

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

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

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1. Name and Address of Reporting Person^*

Vann Brandi C

(Last) (First) (Middle)

C/O 908 DEVICES INC.

44 THIRD AVENUE

(Street)

BURLINGTON MA 01803

(City) (State) (Zip)

2. Date of Event Requiring Statement (Month/Day/Year)
08/01/2025

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

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

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

5. 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 Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

Remarks:

This Form 4 is being filed late due to an inadvertent administrative error.

No securities are beneficially owned.

	/s/ Michael S. Turner, as Attorney-in-Fact	08/18/2025
	** 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 5 (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 did the Form 3 for 908 Devices (MASS) disclose?

The Form 3 discloses that Brandi C. Vann is a director and does not beneficially own any securities as of 08/01/2025.

Was the Form 3 for Brandi C. Vann filed on time?

No. The filing notes it was submitted late due to an inadvertent administrative error.

Who signed the Form 3 for the reporting person?

The form is signed by Michael S. Turner as Attorney-in-Fact on 08/18/2025.

Does the Form 3 show any derivative or non-derivative holdings?

No. The filing states explicitly that no securities are beneficially owned and lists no derivative or non-derivative holdings.

What is the reporting person's address listed on the Form 3?

The address listed is 44 Third Avenue, Burlington, MA 01803.