908 Devices (MASS) awards RSUs and stock options to top executive

Rhea-AI Filing Summary

908 Devices Inc. reported equity compensation grants to Chief Business & Strategy Officer Otitoju Kolawole A. on April 21, 2026. He received 110,193 restricted stock units, each representing one share of common stock, vesting in three substantially equal annual installments on the anniversaries following May 1, 2026, subject to continued service.

He was also granted a stock option for 146,789 shares of common stock at an exercise price of $7.26 per share, expiring on April 20, 2036. One-third of these option shares vest on May 1, 2027, with the remaining two-thirds vesting in substantially equal monthly installments over the following 24 months, contingent on continued service. These are compensation awards rather than open-market purchases or sales.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider Otitoju Kolawole A.

Role Chief Bus. & Strategy Officer

Type	Security	Shares	Price	Value
Grant/Award	Stock Option (right to buy)	146,789	$0.00	--
Grant/Award	Restricted Stock Units	110,193	$0.00	--

Holdings After Transaction: Stock Option (right to buy) — 146,789 shares (Direct, null); Restricted Stock Units — 110,193 shares (Direct, null)

Footnotes (1)

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

Key Figures

RSUs granted: 110,193 units Stock options granted: 146,789 shares Option exercise price: $7.26 per share +3 more

6 metrics

RSUs granted 110,193 units Restricted stock units granted April 21, 2026

Stock options granted 146,789 shares Stock option award dated April 21, 2026

Option exercise price $7.26 per share Exercise price for stock option grant

Option expiration April 20, 2036 Expiration date of stock option

Initial option vesting date May 1, 2027 One-third of option shares vest on this date

RSU vesting start May 1, 2026 Three annual RSU vesting installments follow this date

Key Terms

Restricted Stock Units, Stock Option (right to buy), exercise price, vesting, +1 more

5 terms

Restricted Stock Units financial

"These RSUs vest in three substantially equal annual installments"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

Stock Option (right to buy) financial

"Stock Option (right to buy) with 146,789 shares underlying"

exercise price financial

"conversion_or_exercise_price": "7.2600""

The exercise price is the fixed amount at which you can buy or sell an asset, like a stock, when using an options contract. It matters because it helps determine whether exercising the option will be profitable or not, depending on the current market price. Think of it as the set price you agree on today to buy or sell later.

vesting financial

"become vested and exercisable in substantially equal monthly installments"

Vesting is the process by which you earn full ownership of something, like company stock or a retirement benefit, over time. It’s like earning the right to keep a gift piece by piece the longer you stay with a company, making sure employees stay committed before they receive all the benefits.

expiration date financial

"expiration_date": "2036-04-20T00:00:00.000Z""

The expiration date is the deadline after which a financial contract, such as an option or a futures agreement, is no longer valid or can be exercised. It matters to investors because it determines the timeframe during which they can take action or benefit from the contract, similar to how a coupon or a food item has a limited period of usefulness. Once the expiration date passes, the contract loses its value or ability to be used.

Form 4 Insider Transactions: What Each Field Means →

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

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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^*

Otitoju Kolawole A.

(Last) (First) (Middle)

C/O 908 DEVICES INC.

44 3RD AVENUE

(Street)

BURLINGTON MASSACHUSETTS 01803

(City) (State) (Zip)

UNITED STATES

(Country)

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

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

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Bus. & Strategy Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
04/21/2026

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

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

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

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

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
Stock Option (right to buy)	$7.26	04/21/2026		A		146,789		(1)	04/20/2036	Common Stock	146,789	$0	146,789	D
Restricted Stock Units	(2)	04/21/2026		A		110,193		(3)	(3)	Common Stock	110,193	$0	110,193	D

Explanation of Responses:

1. One-third of the shares underlying the option become vested and exercisable on May 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 May 1, 2027, subject to the reporting person's continued service through the applicable vesting date.

2. Each restricted stock unit ("RSU") represents a contingent right to receive one share of Common Stock, par value $0.001, when vested.

3. These RSUs vest in three substantially equal annual installments at the three anniversary dates following May 1, 2026, subject to the reporting person's continued service through the applicable vesting date. The RSUs have no expiration date.

	/s/ Mark S. Levine, Attorney-in-Fact	04/22/2026
	** 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.
* Form 4: SEC 1474 (03-26)

FAQ

What insider equity awards did 908 Devices (MASS) disclose for Otitoju Kolawole A.?

908 Devices disclosed that Chief Business & Strategy Officer Otitoju Kolawole A. received 110,193 RSUs and a stock option for 146,789 shares. Both awards vest over several years and are contingent on his continued service with the company.

How do the new RSUs for 908 Devices (MASS) executive vest over time?

The 110,193 restricted stock units vest in three substantially equal annual installments on the three anniversary dates following May 1, 2026. Each vested RSU converts into one share of 908 Devices common stock, subject to the executive’s continued service through each vesting date.

What are the key terms of the stock option granted by 908 Devices (MASS)?

The stock option covers 146,789 shares of common stock at a $7.26 exercise price and expires April 20, 2036. One-third vests on May 1, 2027, with the remaining two-thirds vesting in equal monthly installments over the next 24 months, subject to continued service.

Are the recent Form 4 transactions for 908 Devices (MASS) open-market trades?

No, the Form 4 transactions reflect equity awards, not open-market trades. The executive received RSUs and stock options as compensation, which vest over time and become exercisable or settle into common shares only if service requirements are met.

What does each RSU granted by 908 Devices (MASS) represent?

Each restricted stock unit represents a contingent right to receive one share of 908 Devices common stock, par value $0.001, upon vesting. The RSUs have no expiration date and will settle into shares only when the specified vesting conditions are satisfied.