MCCALLION KEVIN J.

PrivateCIK: 2115341

Location

BURLINGTON, MA

MCCALLION KEVIN J. enters 908 DEVICES INC. with 44.92K shares plus derivative instruments

Holding both equity and derivatives at entry signals strong long-term conviction in the company.

Direct Derivatives

MCCALLION KEVIN J.

Filed: 3/4/2026ACC: 0002115341-26-000003

InsiderMCCALLION KEVIN J.CIK 2115341

→

Issuer908 DEVICES INC.CIK 1555279

Officer· SVP, Products and Production

Since Feb 2026

44.92K

Baseline shares

100% direct

44.92K

Direct ownership

1 position

324.30K

Derivative underlying

10 instruments

1

Security positions

All direct

Non-Derivative Holdings1

Common Stock

Direct

Shares owned44.92K

Total

44.92K direct44.92K

Security Title	Shares Owned	Ownership Type
Common Stock	44.92K	Direct
Total	44.92K	44.92K direct

Derivative Holdings10

Stock Option (right to buy)

Direct

Underlying security

Common Stock

Underlying shares

21.19K

Shares owned

N/A

Exercise price

6.19

Expiration

—

Exercise window

—

Stock Option (right to buy)

Direct

Underlying security

Common Stock

Underlying shares

42.01K

Shares owned

N/A

Exercise price

7.35

Expiration

—

Exercise window

—

Stock Option (right to buy)

Direct

Underlying security

Common Stock

Underlying shares

40.01K

Shares owned

N/A

Exercise price

1.98

Expiration

—

Exercise window

—

Stock Option (right to buy)

Direct

Underlying security

Common Stock

Underlying shares

26.69K

Shares owned

N/A

Exercise price

1.05

Expiration

—

Exercise window

—

Stock Option (right to buy)

Direct

Underlying security

Common Stock

Underlying shares

37.80K

Shares owned

N/A

Exercise price

8.83

Expiration

—

Exercise window

—

Restricted Stock Units

Direct

Underlying security

Common Stock

Underlying shares

6.23K

Shares owned

N/A

Exercise price

Expiration

—

Exercise window

—

Stock Option (right to buy)

Direct

Underlying security

Common Stock

Underlying shares

27.92K

Shares owned

N/A

Exercise price

16.66

Expiration

—

Exercise window

—

Restricted Stock Units

Direct

Underlying security

Common Stock

Underlying shares

15.38K

Shares owned

N/A

Exercise price

Expiration

—

Exercise window

—

Restricted Stock Units

Direct

Underlying security

Common Stock

Underlying shares

58.60K

Shares owned

N/A

Exercise price

Expiration

—

Exercise window

—

Restricted Stock Units

Direct

Underlying security

Common Stock

Underlying shares

48.47K

Shares owned

N/A

Exercise price

Expiration

—

Exercise window

—

Total

Underlying

324.30K

Owned

0.00

Security	Underlying	Exercise Price	Exercise Window	Expiration	Underlying Shares	Shares Owned
Stock Option (right to buy) Direct	Common Stock	6.19	—	—	21.19K	N/A
Stock Option (right to buy) Direct	Common Stock	7.35	—	—	42.01K	N/A
Stock Option (right to buy) Direct	Common Stock	1.98	—	—	40.01K	N/A
Stock Option (right to buy) Direct	Common Stock	1.05	—	—	26.69K	N/A
Stock Option (right to buy) Direct	Common Stock	8.83	—	—	37.80K	N/A
Restricted Stock Units Direct	Common Stock		—	—	6.23K	N/A
Stock Option (right to buy) Direct	Common Stock	16.66	—	—	27.92K	N/A
Restricted Stock Units Direct	Common Stock		—	—	15.38K	N/A
Restricted Stock Units Direct	Common Stock		—	—	58.60K	N/A
Restricted Stock Units Direct	Common Stock		—	—	48.47K	N/A
Total					324.30K	0.00

MCCALLION KEVIN J. — Initial Ownership Disclosure (Form 3) Filed Mar 4, 2026 | Finecho