908 Devices officer reports option and RSU holdings

908 Devices Inc. filed an initial Form 3 for Chief Legal and Administrative Officer Mark S. Levine, reporting existing equity awards.

Rhea-AI Filing Summary

908 Devices Inc. filed an initial Form 3 for Chief Legal and Administrative Officer Mark S. Levine, reporting existing equity awards. He holds stock options covering 130,468 shares and 98,242 restricted stock units. The options begin vesting on January 1, 2027, with one-third vesting then and the remaining two-thirds vesting in substantially equal monthly installments over the following 24 months, subject to continued service. The RSUs vest in three substantially equal annual installments on the anniversary dates following January 1, 2026, also contingent on continued service, and each RSU converts into one share of common stock when vested.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider Levine Mark S.

Role Chief Legal and Admin. Officer

Type	Security	Shares	Price	Value
holding	Stock Option (right to buy)	--	--	--
holding	Restricted Stock Units	--	--	--

Holdings After Transaction: Stock Option (right to buy) — 130,468 contracts (Direct); Restricted Stock Units — 98,242 contracts (Direct)

Footnotes (3)

1. F1. One-third of the shares underlying the option become vested and exercisable on January 1, 2027, and the remaining two-thirds of the shares underlying the option become vested and exercisable in substantially equal monthly installments over the 24 months following January 1, 2027, subject to the reporting person's continued service through the applicable vesting date.
2. F2. These restricted stock units ("RSUs") vest in three substantially equal annual installments at the three anniversary dates following January 1, 2026, subject to the reporting person's continued service through the applicable vesting date. The RSUs have no expiration date.
3. F3. Each RSU represents a contingent right to receive one share of Common Stock, par value $0.001, when vested.

FAQ

What does 908 Devices (MASS) report in Mark S. Levine’s Form 3?

The Form 3 reports Mark S. Levine’s existing equity awards in 908 Devices Inc., including stock options and restricted stock units. It establishes his initial ownership position as Chief Legal and Administrative Officer in terms of company equity incentives.

How many stock options does Mark S. Levine hold in 908 Devices Inc.?

Mark S. Levine holds stock options covering 130,468 shares of 908 Devices Inc. common stock. These options vest over time, starting on January 1, 2027, with vesting dependent on his continued service with the company through each applicable vesting date.

What are the vesting terms for Mark S. Levine’s stock options at 908 Devices?

One-third of his stock options vest and become exercisable on January 1, 2027. The remaining two-thirds vest in substantially equal monthly installments over the 24 months following that date, contingent on his continued service with 908 Devices Inc. throughout the vesting period.

How many restricted stock units (RSUs) does Mark S. Levine hold at 908 Devices?

Mark S. Levine holds 98,242 restricted stock units in 908 Devices Inc. Each RSU represents a contingent right to receive one share of common stock, providing equity-based compensation that aligns his interests with the company’s long-term performance.

What are the vesting conditions for Mark S. Levine’s RSUs in 908 Devices (MASS)?

His RSUs vest in three substantially equal annual installments on the three anniversary dates following January 1, 2026. Vesting is subject to his continued service with 908 Devices Inc., and the RSUs have no expiration date according to the disclosure.

What does each RSU represent in Mark S. Levine’s 908 Devices equity awards?

Each restricted stock unit represents a contingent right to receive one share of 908 Devices Inc. common stock when vested. This means, upon vesting, RSUs convert into actual shares, forming a key component of his long-term incentive compensation package.

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Accepted by SEC EDGAR 03/05/2026 - 04:52 PM Learn about SEC filing dates

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

OMB APPROVAL

OMB Number:			3235-0104
Estimated average burden
hours per response:			0.5

1. Name and Address of Reporting Person^*

Levine Mark S.

(Last) (First) (Middle)

C/O 908 DEVICES INC.

44 3RD AVENUE

(Street)

BURLINGTON MA 01803

(City) (State) (Zip)

2. Date of Event Requiring Statement (Month/Day/Year)
02/26/2026

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

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

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Legal and Admin. Officer

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
Stock Option (right to buy)	(1)	12/07/2035	Common Stock	130,468	$6.68	D
Restricted Stock Units	(2)	(2)	Common Stock	98,242	(3)	D

Explanation of Responses:

1. One-third of the shares underlying the option become vested and exercisable on January 1, 2027, and the remaining two-thirds of the shares underlying the option become vested and exercisable in substantially equal monthly installments over the 24 months following January 1, 2027, subject to the reporting person's continued service through the applicable vesting date.

2. These restricted stock units ("RSUs") vest in three substantially equal annual installments at the three anniversary dates following January 1, 2026, subject to the reporting person's continued service through the applicable vesting date. The RSUs have no expiration date.

3. Each RSU represents a contingent right to receive one share of Common Stock, par value $0.001, when vested.

	/s/ Mark S. Levine	03/05/2026
	** 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 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.