Kevin J. Knopp

CIK: 0001836523

Transaction Breakdown

Open Market Buys (P)2 (6.7%)

High conviction signal

Open Market Sales (S)15 (50.0%)

Position reduction

Option Exercises (M)9 (30.0%)

Derivative conversions

Awards (A)4 (13.3%)

Compensation grants

Other (G, F, J, C, D, …)0 (0.0%)

Gifts, tax withholding, conversions, dispositions to the issuer and other codes

Companies & Roles (1)

MASS

908 Devices Inc.

DirectorOfficer

Discretionary Trading P&L

Holdings

Transaction History (30 total)

MASS
908 Devices Inc.
Aug 17, 2026
Sale(S)
Direct
20K shares at avg. $10.35$207K
MASS
908 Devices Inc.
Aug 13, 2026
Sale(S)
Direct
7.6K shares at avg. $10.06$77K
MASS
908 Devices Inc.
Aug 12, 2026
Sale(S)
Direct
2.7K shares at avg. $10.07$28K
MASS
908 Devices Inc.
Aug 11, 2026
Sale(S)
Direct
30.2K shares at avg. $10.16$307K
MASS
908 Devices Inc.
Aug 11, 2026
Sale(S)
Direct
115.7K shares at avg. $9.83$1.1M
MASS
908 Devices Inc.
Aug 10, 2026
Sale(S)
Direct
348 shares at avg. $9.06$3K
MASS
908 Devices Inc.
Jul 2, 2026
Sale(S)
Direct
222 shares at avg. $9.07$2K
MASS
908 Devices Inc.
Jun 26, 2026
Sale(S)
Direct
2.8K shares at avg. $9.09$25K
MASS
908 Devices Inc.
Jun 25, 2026
Sale(S)
Direct
16.4K shares at avg. $9.10$149K
MASS
908 Devices Inc.
Jun 24, 2026
Sale(S)
Direct
40.5K shares at avg. $9.14$370K
MASS
908 Devices Inc.
Jun 23, 2026
Sale(S)
Direct
3.4K shares at avg. $9.06$31K
MASS
908 Devices Inc.
Feb 2, 2026
Award(A)
Stock Option (option to buy)
Direct
90K shares-
MASS
908 Devices Inc.
Feb 2, 2026
Sale(S)
Direct
34.8K shares at avg. $6.18$215K
MASS
908 Devices Inc.
Feb 2, 2026
Award(A)
Restricted Stock Units
Direct
206K shares-
MASS
908 Devices Inc.
Feb 1, 2026
Exercise(M)
Direct
17K shares-
MASS
908 Devices Inc.
Feb 1, 2026
Exercise(M)
Direct
13.4K shares-
MASS
908 Devices Inc.
Feb 1, 2026
Exercise(M)
Direct
11.3K shares-
MASS
908 Devices Inc.
Feb 1, 2026
Exercise(M)
Direct
66.3K shares-
MASS
908 Devices Inc.
May 15, 2025
Purchase(P)
Direct
15K shares at avg. $4.44$67K
MASS
908 Devices Inc.
May 14, 2025
Purchase(P)
Direct
15K shares at avg. $4.32$65K
MASS
908 Devices Inc.
Mar 3, 2025
Award(A)
Stock Option (option to buy)
Direct
90.5K shares-
MASS
908 Devices Inc.
Mar 3, 2025
Award(A)
Restricted Stock Units
Direct
198.9K shares-
MASS
908 Devices Inc.
Feb 3, 2025
Sale(S)
Direct
5.2K shares at avg. $2.31$12K
MASS
908 Devices Inc.
Feb 3, 2025
Sale(S)
Direct
4.3K shares at avg. $2.33$10K
MASS
908 Devices Inc.
Feb 3, 2025
Sale(S)
Direct
6.5K shares at avg. $2.32$15K

		Type	Shares	Price		Ownership
Aug 17, 2026	MASS 908 Devices Inc.	Sale(S)	20,000	$10.35	$207,000	Direct
Aug 13, 2026	MASS 908 Devices Inc.	Sale(S)	7,622	$10.06	$76,677	Direct
Aug 12, 2026	MASS 908 Devices Inc.	Sale(S)	2,747	$10.07	$27,662	Direct
Aug 11, 2026	MASS 908 Devices Inc.	Sale(S)	30,170	$10.16	$306,527	Direct
Aug 11, 2026	MASS 908 Devices Inc.	Sale(S)	115,748	$9.83	$1,137,803	Direct
Aug 10, 2026	MASS 908 Devices Inc.	Sale(S)	348	$9.06	$3,153	Direct
Jul 2, 2026	MASS 908 Devices Inc.	Sale(S)	222	$9.07	$2,014	Direct
Jun 26, 2026	MASS 908 Devices Inc.	Sale(S)	2,798	$9.09	$25,434	Direct
Jun 25, 2026	MASS 908 Devices Inc.	Sale(S)	16,388	$9.10	$149,131	Direct
Jun 24, 2026	MASS 908 Devices Inc.	Sale(S)	40,535	$9.14	$370,490	Direct
Jun 23, 2026	MASS 908 Devices Inc.	Sale(S)	3,422	$9.06	$31,003	Direct
Feb 2, 2026	MASS 908 Devices Inc.	Award(A) Stock Option (option to buy)	90,043	-	-	Direct
Feb 2, 2026	MASS 908 Devices Inc.	Sale(S)	34,764	$6.18	$214,842	Direct
Feb 2, 2026	MASS 908 Devices Inc.	Award(A) Restricted Stock Units	205,978	-	-	Direct
Feb 1, 2026	MASS 908 Devices Inc.	Exercise(M)	17,007	-	$0	Direct
Feb 1, 2026	MASS 908 Devices Inc.	Exercise(M)	13,449	-	$0	Direct
Feb 1, 2026	MASS 908 Devices Inc.	Exercise(M)	11,255	-	$0	Direct
Feb 1, 2026	MASS 908 Devices Inc.	Exercise(M)	66,288	-	$0	Direct
May 15, 2025	MASS 908 Devices Inc.	Purchase(P)	15,000	$4.44	$66,596	Direct
May 14, 2025	MASS 908 Devices Inc.	Purchase(P)	15,000	$4.32	$64,788	Direct
Mar 3, 2025	MASS 908 Devices Inc.	Award(A) Stock Option (option to buy)	90,518	-	-	Direct
Mar 3, 2025	MASS 908 Devices Inc.	Award(A) Restricted Stock Units	198,864	-	-	Direct
Feb 3, 2025	MASS 908 Devices Inc.	Sale(S)	5,159	$2.31	$11,921	Direct
Feb 3, 2025	MASS 908 Devices Inc.	Sale(S)	4,318	$2.33	$10,064	Direct
Feb 3, 2025	MASS 908 Devices Inc.	Sale(S)	6,524	$2.32	$15,125	Direct

1-25 of 30 transactions

About Knopp Kevin J.

Knopp Kevin J. (SEC CIK 0001836523) files insider reports with the SEC as President and CEO of 908 Devices Inc. (MASS).

Signal8 holds 11 ownership filings by Knopp Kevin J., all Form 4s, filed between Dec 16, 2024 and Aug 17, 2026. Those filings report 30 transactions, from Dec 13, 2024 to Aug 17, 2026. Signal8's Form 4 history starts in Sep 2024.

The business address on Knopp Kevin J.'s filings is in BURLINGTON, MA.

Recent filings by Knopp Kevin J.

Aug 17, 2026: Open-market sale of MASS shares (Form 4, code S).
Aug 13, 2026: Open-market sale of MASS shares (Form 4, code S).
Aug 12, 2026: Open-market sale of MASS shares (Form 4, code S).
Aug 11, 2026: Open-market sales of MASS shares (2 lines, Form 4, code S).
Aug 10, 2026: Open-market sale of MASS shares (Form 4, code S).

Other insiders filing for 908 Devices Inc. (MASS)

Brown Christopher D., Director
Griffith Joseph H. IV, Chief Financial Officer
AWM Investment Company, Inc., 10% Owner
Kenneweg John, SVP, Sales & Product Marketing
Vann Brandi C, Director
Leonhart Michele M., Director

How to read Form 4 transaction codes