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908 Devices Inc.

MASS Net selling
CIK 0001555279 #3233 in the set updated 17 Sep 2026
Bought (120 mo)
$15.99M
out of their own pocket, the only kind of buying there is
Sold (120 mo)
$37.47M
$5.17M on a plan · $12.79M straight out of an exercise
Sold at will
$19.52M
111 of 217 sales
Net
−$21.48M
−$3.52M against sales at will

By person

21 insiders · 250 transactions
Insider
Role
Bought
Sold
Net
Holding
Worth
Change
Knopp Kevin J.
President and CEO
$424.78K (7)
$11.35M (57)
−$10.93M
1,097,191
$11.61M
−13.2%
Brown Christopher D.
Director
$7.56M (51)
−$7.56M
775,559
$8.21M
−29.8%
ARCH Venture Fund VII, L.P. entity
10% owner
$6.00M (1)
+$6.00M
5,725,045
$60.57M
CRANDELL KEITH
Director
$6.00M (1)
+$6.00M
5,764,419
$60.99M
Basarsky Trent A.
VP, Corporate Development
$100.00K (1)
$4.99M (22) scheduled
−$4.89M
80,000
$846.40K
+1,233%
Griffith Joseph H. IV
Chief Financial Officer
$4.46M (31) scheduled
−$4.46M
121,497
$1.29M
+28.7%
AWM Investment Company, Inc. entity
10% owner
$3.68M (15)
−$3.68M
9,667,264
$102.28M
−4.2%
Kenneweg John
SVP, Sales & Product Marketing
$3.01M (17) scheduled
−$3.01M
57,784
$611.35K
0.0%
Kedar Sharon
Director
$2.00M (1)
+$2.00M
1,077,091
$11.40M
Turner Michael S.
Chief Legal & Admin Officer
$100.00K (1)
$1.69M (16) scheduled
−$1.59M
0
$0.00
HRUSOVSKY E KEVIN
Director
$1.00M (1)
+$1.00M
301,889
$3.19M
BARTHELEMY NICOLAS
Director
$280.00K (1)
$516.37K (3) scheduled
−$236.37K
28,920
$305.97K
McCallion Kevin J.
SVP, Products and Production
$188.02K (4) scheduled
−$188.02K
44,925
$475.31K
0.0%
Spoto Mark
Director
$87.80K (4)
+$87.80K
258,012
$2.73M
Fitzpatrick Maura
VP, Product Management & Mktg
$14.66K (1) scheduled
−$14.66K
2,834
$29.98K
Hunt Anthony
Director
44,168
$467.30K
ELOI FENEL M
Director
40,897
$432.69K
Leonhart Michele M.
Director
27,054
$286.23K
George Jeffrey P.
Director
26,814
$283.69K
Eisenberg Marcia
Director
25,957
$274.63K
Vann Brandi C
Director
5,192
$54.93K

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.

Insider
Date
Role
Action
Shares
Price
Amount
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
AWM Investment Company, Inc.
4 Aug 2026
10% owner
Sell indirect
50,000
$8.36
$417.77K
AWM Investment Company, Inc.
23 Jun 2026
10% owner
Sell indirect
3,050
$9.00
$27.46K
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
AWM Investment Company, Inc.
2 Jun 2026
10% owner
Sell indirect
2,500
$8.95
$22.38K
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
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
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
Turner Michael S.
18 Jun 2025
Chief Legal & Admin Officer
Sell
1,373
$7.50
$10.30K
Turner Michael S.
17 Jun 2025
Chief Legal & Admin Officer
Sell
7,148
$7.51
$53.65K
Turner Michael S.
16 Jun 2025
Chief Legal & Admin Officer
Sell
16,082
$7.51
$120.84K
Griffith Joseph H. IV
4 Jun 2025
Chief Financial Officer
Sell
6,940
$7.08
$49.14K
Brown Christopher D.
3 Feb 2025
Chief Product Officer
Sell
3,641
$2.33
$8.50K
Brown Christopher D.
3 Feb 2025
Chief Product Officer
Sell
2,459
$2.34
$5.76K
Brown Christopher D.
3 Feb 2025
Chief Product Officer
Sell
1,667
$2.36
$3.93K
Knopp Kevin J.
3 Feb 2025
President and CEO
Sell
6,524
$2.32
$15.12K
Knopp Kevin J.
3 Feb 2025
President and CEO
Sell
5,159
$2.31
$11.92K
Knopp Kevin J.
3 Feb 2025
President and CEO
Sell
4,318
$2.33
$10.06K
Turner Michael S.
3 Feb 2025
Chief Legal & Admin Officer
Sell
4,162
$2.32
$9.65K
Turner Michael S.
3 Feb 2025
Chief Legal & Admin Officer
Sell
3,807
$2.32
$8.83K
Turner Michael S.
3 Feb 2025
Chief Legal & Admin Officer
Sell
1,703
$2.36
$4.01K
Griffith Joseph H. IV
3 Feb 2025
Chief Financial Officer
Sell
4,321
$2.35
$10.17K
Griffith Joseph H. IV
3 Feb 2025
Chief Financial Officer
Sell
3,955
$2.34
$9.23K
Griffith Joseph H. IV
3 Feb 2025
Chief Financial Officer
Sell
1,960
$2.34
$4.58K
Griffith Joseph H. IV
2 Feb 2024
Chief Financial Officer
Sell
9,711
$7.09
$68.87K
Griffith Joseph H. IV
28 Dec 2023
Chief Financial Officer
Sell
6,000
$12.08
$72.48K
Brown Christopher D.
21 Dec 2023
Chief Product Officer
Sell
7,370
$9.12
$67.21K
Brown Christopher D.
20 Dec 2023
Chief Product Officer
Sell
5,235
$9.10
$47.64K
Brown Christopher D.
19 Dec 2023
Chief Product Officer
Sell
1,305
$9.08
$11.85K
Brown Christopher D.
19 Dec 2023
Chief Product Officer
Sell
6,090
$9.08
$55.30K
Griffith Joseph H. IV
19 Dec 2023
Chief Financial Officer
Sell
5,580
$9.08
$50.67K
Knopp Kevin J.
16 Feb 2023
President and CEO
Sell
4,842
$10.12
$49.00K
Knopp Kevin J.
15 Feb 2023
President and CEO
Sell
15,158
$10.29
$155.98K
Brown Christopher D.
2 Feb 2023
Chief Technology Officer
Sell
10,000
$10.03
$100.30K
Griffith Joseph H. IV
2 Feb 2023
Chief Financial Officer
Sell
3,266
$10.03
$32.76K
Knopp Kevin J.
2 Feb 2023
President and CEO
Sell
40,000
$10.51
$420.40K
Turner Michael S.
2 Feb 2023
VP, General Counsel
Sell
2,848
$10.02
$28.54K
Knopp Kevin J.
15 Nov 2022
President and CEO
Sell
1,013
$12.40
$12.56K
Knopp Kevin J.
15 Nov 2022
President and CEO
Sell
6,619
$11.76
$77.84K
Knopp Kevin J.
15 Nov 2022
President and CEO
Sell
12,368
$10.54
$130.36K
Knopp Kevin J.
18 Oct 2022
President and CEO
Sell
18,800
$15.32
$288.02K
Knopp Kevin J.
17 Oct 2022
President and CEO
Sell
11,200
$14.68
$164.42K
Knopp Kevin J.
15 Sep 2022
President and CEO
Sell
30,000
$16.94
$508.20K
Brown Christopher D.
12 Sep 2022
Chief Technology Officer
Sell
20,000
$19.58
$391.60K
Knopp Kevin J.
15 Aug 2022
President and CEO
Sell
2,373
$19.72
$46.80K
Knopp Kevin J.
15 Aug 2022
President and CEO
Sell
27,627
$19.23
$531.27K
Knopp Kevin J.
8 Aug 2022
President and CEO
Sell
286
$25.17
$7.20K
Knopp Kevin J.
5 Aug 2022
President and CEO
Sell
25,910
$25.32
$656.04K
Knopp Kevin J.
1 Aug 2022
President and CEO
Sell
14,647
$22.46
$328.97K
Knopp Kevin J.
29 Jul 2022
President and CEO
Sell
18,000
$22.22
$399.96K
Knopp Kevin J.
28 Jul 2022
President and CEO
Sell
5,700
$22.01
$125.46K
Knopp Kevin J.
21 Jul 2022
President and CEO
Sell
200
$22.04
$4.41K
Knopp Kevin J.
15 Jul 2022
President and CEO
Sell
18,231
$17.74
$323.42K
Knopp Kevin J.
15 Jul 2022
President and CEO
Sell
11,769
$16.80
$197.72K
Knopp Kevin J.
8 Jul 2022
President and CEO
Sell
453
$22.06
$9.99K
Knopp Kevin J.
6 Jul 2022
President and CEO
Sell
1,000
$22.07
$22.07K
Brown Christopher D.
6 Jul 2022
Chief Technology Officer
Sell
3,200
$21.78
$69.70K
Brown Christopher D.
6 Jul 2022
Chief Technology Officer
Sell
6,800
$21.04
$143.07K
Brown Christopher D.
30 Jun 2022
Chief Technology Officer
Sell
3,700
$20.12
$74.44K
Brown Christopher D.
29 Jun 2022
Chief Technology Officer
Sell
16,471
$20.22
$333.04K
Turner Michael S.
29 Jun 2022
VP, General Counsel
Sell
5,000
$20.03
$100.15K
Knopp Kevin J.
21 Jun 2022
President and CEO
Sell
9,200
$15.07
$138.64K
Knopp Kevin J.
15 Jun 2022
President and CEO
Sell
2,000
$15.01
$30.02K
Knopp Kevin J.
15 Jun 2022
President and CEO
Sell
18,800
$14.62
$274.86K
Brown Christopher D.
12 Apr 2022
Chief Technology Officer
Sell
9,829
$20.06
$197.17K
Brown Christopher D.
18 Mar 2022
Chief Technology Officer
Sell
19,900
$20.06
$399.19K
Brown Christopher D.
11 Mar 2022
Chief Technology Officer
Sell
100
$20.00
$2.00K
Brown Christopher D.
5 Jan 2022
Chief Technology Officer
Sell
6,714
$24.05
$161.47K
Brown Christopher D.
5 Jan 2022
Chief Technology Officer
Sell
3,286
$22.89
$75.22K
Brown Christopher D.
1 Dec 2021
Chief Technology Officer
Sell
1,230
$24.29
$29.88K
Brown Christopher D.
1 Dec 2021
Chief Technology Officer
Sell
8,770
$23.80
$208.73K
Griffith Joseph H. IV
5 Nov 2021
Chief Financial Officer
Sell
2,800
$39.08
$109.42K
Brown Christopher D.
3 Nov 2021
Chief Technology Officer
Sell
3,426
$33.24
$113.88K
Brown Christopher D.
3 Nov 2021
Chief Technology Officer
Sell
11,574
$32.75
$379.05K
Knopp Kevin J.
1 Nov 2021
President and CEO
Sell
8,328
$35.27
$293.73K
Knopp Kevin J.
1 Nov 2021
President and CEO
Sell
7,775
$34.38
$267.30K
Knopp Kevin J.
1 Nov 2021
President and CEO
Sell
3,897
$33.71
$131.37K
Brown Christopher D.
6 Oct 2021
Chief Technology Officer
Sell
1,580
$33.33
$52.66K
Brown Christopher D.
6 Oct 2021
Chief Technology Officer
Sell
13,420
$32.19
$431.99K
Knopp Kevin J.
1 Oct 2021
President and CEO
Sell
5,472
$34.93
$191.14K
Knopp Kevin J.
1 Oct 2021
President and CEO
Sell
4,829
$33.73
$162.88K
Knopp Kevin J.
1 Oct 2021
President and CEO
Sell
9,699
$32.89
$319.00K
Basarsky Trent A.
23 Sep 2021
VP, Corporate Development
Sell
3,872
$38.04
$147.29K
Basarsky Trent A.
23 Sep 2021
VP, Corporate Development
Sell
2,128
$37.09
$78.93K
Brown Christopher D.
1 Sep 2021
Chief Technology Officer
Sell
6,315
$36.24
$228.86K
Brown Christopher D.
1 Sep 2021
Chief Technology Officer
Sell
8,685
$35.68
$309.88K
Knopp Kevin J.
1 Sep 2021
President and CEO
Sell
3,583
$36.37
$130.31K
Knopp Kevin J.
1 Sep 2021
President and CEO
Sell
10,818
$36.02
$389.66K
Knopp Kevin J.
1 Sep 2021
President and CEO
Sell
5,599
$35.40
$198.20K
Knopp Kevin J.
18 Aug 2021
President and CEO
Sell
12,000
$30.44
$365.28K
Knopp Kevin J.
17 Aug 2021
President and CEO
Sell
4,000
$30.01
$120.04K
Knopp Kevin J.
16 Aug 2021
President and CEO
Sell
9,522
$30.22
$287.75K
Knopp Kevin J.
16 Aug 2021
President and CEO
Sell
6,035
$30.76
$185.64K
Knopp Kevin J.
16 Aug 2021
President and CEO
Sell
3,443
$31.22
$107.49K
Brown Christopher D.
4 Aug 2021
Chief Technology Officer
Sell
5,400
$33.40
$180.36K
Brown Christopher D.
4 Aug 2021
Chief Technology Officer
Sell
5,100
$32.47
$165.60K
Brown Christopher D.
4 Aug 2021
Chief Technology Officer
Sell
4,500
$31.58
$142.11K
Brown Christopher D.
7 Jul 2021
Chief Technology Officer
Sell
200
$34.99
$7.00K
Brown Christopher D.
7 Jul 2021
Chief Technology Officer
Sell
5,035
$34.25
$172.45K
Brown Christopher D.
7 Jul 2021
Chief Technology Officer
Sell
29,765
$33.52
$997.72K
Griffith Joseph H. IV
16 Jun 2021
Chief Financial Officer
Sell
17,814
$39.32
$700.45K

What was left out

Form 4 filings counted 240
Amendments (4/A) skipped 4
Filings about a different issuer 0
Unreadable filings 0
Joint filings 1
Sales on a Rule 10b5-1 plan 34
Sales straight out of an exercise 72
Sales at will 111
Transactions with no price 0
Shares from compensation/vesting 15,817,428
Sales filed before the plan box existed 70
History held since 21 Dec 2020