KNOPP KEVIN J. (President and CEO) sold 4.2% of their position (34.76K shares) of 908 DEVICES INC. on the open market

Open‑market sale worth $214.8K — a minor trim. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 1 sale

KNOPP KEVIN J.

Filed: 2/3/2026ACC: 0001836523-26-000002

InsiderKNOPP KEVIN J.CIK 1836523

→

Issuer908 DEVICES INC.CIK 1555279

DirectorOfficer· President and CEO

Since Dec 2020

+261.26K

Net shares

Net buyer

$214.8K

Total sold

Open market trades

0B · 1S

Total transactions

404.02K acquired · 142.76K disposed

Non-Derivative Transactions5

Common Stock

Direct

M · Option Exercise

+11.26K

Price / share

—

Trade value

—

% of position

1.6%

2/1/2026

722.73K→733.99K

Common Stock

Direct

M · Option Exercise

+13.45K

Price / share

—

Trade value

—

% of position

1.8%

2/1/2026

733.99K→747.44K

Common Stock

Direct

M · Option Exercise

+17.01K

Price / share

—

Trade value

—

% of position

2.3%

2/1/2026

747.44K→764.44K

Common Stock

Direct

M · Option Exercise

+66.29K

Price / share

—

Trade value

—

% of position

8.7%

2/1/2026

764.44K→830.73K

Common Stock

Direct

S · Sale

−34.76K

Price / share

$6.18

Trade value

$214.84K

% of position

4.2%

2/2/2026

830.73K→795.97K

Total

Net shares

+73.23K

Net value

-$214.84K

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Common Stock Direct	2/1/2026	M · Option Exercise	+11.26K	—	—	1.6%	722.73K	733.99K
Common Stock Direct	2/1/2026	M · Option Exercise	+13.45K	—	—	1.8%	733.99K	747.44K
Common Stock Direct	2/1/2026	M · Option Exercise	+17.01K	—	—	2.3%	747.44K	764.44K
Common Stock Direct	2/1/2026	M · Option Exercise	+66.29K	—	—	8.7%	764.44K	830.73K
Common Stock Direct	2/2/2026	S · Sale	−34.76K	$6.18	$214.84K	4.2%	830.73K	795.97K
Total			+73.23K		-$214.84K

Derivative Transactions6

Restricted Stock Units

Direct

M · Option Exercise

Converts to

Common Stock

11.26K shares

−11.26K

Strike price

Held after

0.00

Exercisable

—

2/1/2026

Restricted Stock Units

Direct

M · Option Exercise

Converts to

Common Stock

13.45K shares

−13.45K

Strike price

Held after

13.45K

Exercisable

—

2/1/2026

Restricted Stock Units

Direct

M · Option Exercise

Converts to

Common Stock

17.01K shares

−17.01K

Strike price

Held after

34.01K

Exercisable

—

2/1/2026

Restricted Stock Units

Direct

M · Option Exercise

Converts to

Common Stock

66.29K shares

−66.29K

Strike price

Held after

132.58K

Exercisable

—

2/1/2026

Restricted Stock Units

Direct

A · Award

Converts to

Common Stock

205.98K shares

+205.98K

Strike price

Held after

205.98K

Exercisable

—

2/2/2026

Stock Option (option to buy)

Direct

A · Award

Converts to

Common Stock

90.04K shares

+90.04K

Strike price

6.19

Held after

90.04K

Exercisable

—

2/2/2026

Security	Converts To	Date	Type	Shares	Strike Price	Exercisable	Held After
Restricted Stock Units Direct	Common Stock11.26K shares	2/1/2026	M · Option Exercise	−11.26K		—	0.00
Restricted Stock Units Direct	Common Stock13.45K shares	2/1/2026	M · Option Exercise	−13.45K		—	13.45K
Restricted Stock Units Direct	Common Stock17.01K shares	2/1/2026	M · Option Exercise	−17.01K		—	34.01K
Restricted Stock Units Direct	Common Stock66.29K shares	2/1/2026	M · Option Exercise	−66.29K		—	132.58K
Restricted Stock Units Direct	Common Stock205.98K shares	2/2/2026	A · Award	+205.98K		—	205.98K
Stock Option (option to buy) Direct	Common Stock90.04K shares	2/2/2026	A · Award	+90.04K	6.19	—	90.04K

Non-Derivative Holdings (Post-Transaction)1

Common Stock

Indirect

Shares owned541.22K

Total

541.22K indirect541.22K

Security Title	Shares Owned	Ownership Type
Common Stock	541.22K	Indirect
Total	541.22K	541.22K indirect

Derivative Holdings (Post-Transaction)0

No derivative holdings reported