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908 Devices Inc.

MASS Net selling
CIK 0001555279 #3233 in the set updated 17 Sep 2026
Bought (12 mo)
$0.00
out of their own pocket, the only kind of buying there is
Sold (12 mo)
$8.84M
$4.41M on a plan · $241.15K straight out of an exercise
Sold at will
$4.19M
18 of 53 sales
Net
−$8.84M
−$4.19M against sales at will

By person

16 insiders · 53 transactions
Insider
Role
Bought
Sold
Net
Holding
Worth
Change
AWM Investment Company, Inc. entity
10% owner
—
$3.68M (15)
−$3.68M
9,667,264
$102.28M
−4.2%
Knopp Kevin J.
President and CEO
—
$2.55M (12) scheduled
−$2.55M
555,968
$5.88M
+9.2%
Brown Christopher D.
Director
—
$1.81M (14) scheduled
−$1.81M
775,559
$8.21M
−13.0%
Griffith Joseph H. IV
Chief Financial Officer
—
$411.95K (6) scheduled
−$411.95K
121,497
$1.29M
+30.0%
Kenneweg John
SVP, Sales & Product Marketing
—
$201.23K (2)
−$201.23K
57,784
$611.35K
0.0%
McCallion Kevin J.
SVP, Products and Production
—
$188.02K (4) scheduled
−$188.02K
44,925
$475.31K
0.0%
HRUSOVSKY E KEVIN
Director
—
—
—
165,390
$1.75M
+18.2%
Spoto Mark
Director
—
—
—
89,346
$945.28K
+68.7%
Hunt Anthony
Director
—
—
—
44,168
$467.30K
+165.1%
ELOI FENEL M
Director
—
—
—
40,897
$432.69K
+164.7%
CRANDELL KEITH
Director
—
—
—
39,374
$416.58K
+182.7%
Leonhart Michele M.
Director
—
—
—
27,054
$286.23K
—
George Jeffrey P.
Director
—
—
—
26,814
$283.69K
+73.6%
Eisenberg Marcia
Director
—
—
—
25,957
$274.63K
+77.9%
Vann Brandi C
Director
—
—
—
5,192
$54.93K
—
Turner Michael S.
Chief Legal & Admin Officer
—
—
—
0
$0.00
−100.0%

No percentages here. These insiders hold more than one class of share between them, and the share count on file covers one of them rather than all. Dividing the two would compare different things.

Individual transactions

53
Insider
Date
Role
Action
Shares
Price
Amount
Brown Christopher D.
2 Sep 2026
Director
Sold on a plan
30,000
$10.58
$317.40K
Griffith Joseph H. IV
25 Aug 2026
Chief Financial Officer
Sold on a plan
11,459
$10.95
$125.48K
AWM Investment Company, Inc.
21 Aug 2026
10% owner
Sell indirect
41,578
$10.61
$441.16K
AWM Investment Company, Inc.
20 Aug 2026
10% owner
Sell indirect
8,422
$10.52
$88.64K
Knopp Kevin J.
17 Aug 2026
President and CEO
Sold on a plan
20,000
$10.35
$207.00K
Knopp Kevin J.
13 Aug 2026
President and CEO
Sold on a plan
7,622
$10.06
$76.68K
Knopp Kevin J.
12 Aug 2026
President and CEO
Sold on a plan
2,747
$10.07
$27.66K
Knopp Kevin J.
11 Aug 2026
President and CEO
Sold on a plan
30,170
$10.16
$306.53K
Knopp Kevin J.
11 Aug 2026
President and CEO
Sold on a plan
115,748
$9.83
$1.14M
Brown Christopher D.
11 Aug 2026
Director
Sold on a plan
8,358
$9.23
$77.14K
Knopp Kevin J.
10 Aug 2026
President and CEO
Sold on a plan
348
$9.06
$3.15K
Brown Christopher D.
10 Aug 2026
Director
Sold on a plan
9,442
$9.03
$85.26K
Brown Christopher D.
5 Aug 2026
Director
Sold on a plan
20,000
$8.49
$169.80K
AWM Investment Company, Inc.
4 Aug 2026
10% owner
Sell indirect
50,000
$8.36
$417.77K
Brown Christopher D.
2 Jul 2026
Director
Sold on a plan
2,200
$9.02
$19.84K
Knopp Kevin J.
2 Jul 2026
President and CEO
Sold on a plan
222
$9.07
$2.01K
Brown Christopher D.
30 Jun 2026
Director
Sold on a plan
20,000
$8.84
$176.80K
Knopp Kevin J.
26 Jun 2026
President and CEO
Sold on a plan
2,798
$9.09
$25.43K
Knopp Kevin J.
25 Jun 2026
President and CEO
Sold on a plan
16,388
$9.10
$149.13K
Knopp Kevin J.
24 Jun 2026
President and CEO
Sold on a plan
40,535
$9.14
$370.49K
AWM Investment Company, Inc.
23 Jun 2026
10% owner
Sell indirect
3,050
$9.00
$27.46K
Knopp Kevin J.
23 Jun 2026
President and CEO
Sold on a plan
3,422
$9.06
$31.00K
Brown Christopher D.
23 Jun 2026
Director
Sold on a plan
9,900
$9.04
$89.50K
AWM Investment Company, Inc.
22 Jun 2026
10% owner
Sell indirect
4,668
$8.99
$41.97K
AWM Investment Company, Inc.
4 Jun 2026
10% owner
Sell indirect
39,782
$8.97
$356.86K
Brown Christopher D.
4 Jun 2026
Director
Sold on a plan
100
$9.00
$900.00
Brown Christopher D.
3 Jun 2026
Director
Sold on a plan
20,000
$8.73
$174.60K
AWM Investment Company, Inc.
2 Jun 2026
10% owner
Sell indirect
2,500
$8.95
$22.38K
Griffith Joseph H. IV
28 May 2026
Chief Financial Officer
Sold on a plan
6,940
$9.03
$62.67K
Brown Christopher D.
28 May 2026
Director
Sold on a plan
30,000
$9.00
$270.00K
AWM Investment Company, Inc.
28 May 2026
10% owner
Sell indirect
170,442
$8.66
$1.48M
AWM Investment Company, Inc.
27 May 2026
10% owner
Sell indirect
15,000
$8.25
$123.79K
AWM Investment Company, Inc.
27 May 2026
10% owner
Sell indirect
1,500
$8.25
$12.38K
AWM Investment Company, Inc.
11 May 2026
10% owner
Sell indirect
5,000
$8.25
$41.26K
AWM Investment Company, Inc.
8 May 2026
10% owner
Sell indirect
3,025
$8.20
$24.81K
Kenneweg John
8 May 2026
SVP, Sales & Product Marketing
Sell
18,255
$8.11
$148.05K
AWM Investment Company, Inc.
7 May 2026
10% owner
Sell indirect
12,819
$8.20
$105.17K
Brown Christopher D.
6 May 2026
Director
Sold on a plan
20,000
$7.23
$144.60K
AWM Investment Company, Inc.
6 May 2026
10% owner
Sell indirect
57,365
$8.06
$462.16K
AWM Investment Company, Inc.
6 May 2026
10% owner
Sell indirect
5,000
$8.00
$40.00K
Kenneweg John
1 May 2026
SVP, Sales & Product Marketing
Sold after exercise
7,787
$6.83
$53.19K
Brown Christopher D.
10 Apr 2026
Director
Sold on a plan
17,578
$7.07
$124.28K
McCallion Kevin J.
10 Apr 2026
SVP, Products and Production
Sold after exercise
2,693
$7.01
$18.88K
Brown Christopher D.
9 Apr 2026
Director
Sold on a plan
7,392
$7.04
$52.04K
McCallion Kevin J.
9 Apr 2026
SVP, Products and Production
Sold after exercise
5,420
$7.03
$38.10K
Brown Christopher D.
8 Apr 2026
Director
Sold on a plan
15,030
$7.05
$105.96K
McCallion Kevin J.
8 Apr 2026
SVP, Products and Production
Sold after exercise
18,580
$7.05
$130.99K
McCallion Kevin J.
2 Mar 2026
SVP, Products and Production
Sold on a plan
7
$7.00
$49.00
Griffith Joseph H. IV
2 Feb 2026
Chief Financial Officer
Sell
23,175
$6.18
$143.22K
Knopp Kevin J.
2 Feb 2026
President and CEO
Sell
34,764
$6.18
$214.84K
Griffith Joseph H. IV
3 Oct 2025
Chief Financial Officer
Sold on a plan
4,292
$9.05
$38.85K
Griffith Joseph H. IV
2 Oct 2025
Chief Financial Officer
Sold on a plan
708
$9.04
$6.40K
Griffith Joseph H. IV
19 Sep 2025
Chief Financial Officer
Sold on a plan
5,000
$7.07
$35.34K

What was left out

Form 4 filings counted 47
Amendments (4/A) skipped 1
Filings about a different issuer 0
Unreadable filings 0
Joint filings 0
Sales on a Rule 10b5-1 plan 31
Sales straight out of an exercise 4
Sales at will 18
Transactions with no price 0
Shares from compensation/vesting 353,272
History held since 21 Dec 2020