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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.

Individual transactions

72
Insider
Date
Role
Action
Shares
Price
Amount
Kenneweg John
1 May 2026
SVP, Sales & Product Marketing
Sold after exercise
7,787
$6.83
$53.19K
McCallion Kevin J.
10 Apr 2026
SVP, Products and Production
Sold after exercise
2,693
$7.01
$18.88K
McCallion Kevin J.
9 Apr 2026
SVP, Products and Production
Sold after exercise
5,420
$7.03
$38.10K
McCallion Kevin J.
8 Apr 2026
SVP, Products and Production
Sold after exercise
18,580
$7.05
$130.99K
Brown Christopher D.
1 Feb 2024
Chief Product Officer
Sold after exercise
2,358
$7.02
$16.55K
Brown Christopher D.
1 Feb 2024
Chief Product Officer
Sold after exercise
1,599
$6.99
$11.18K
Knopp Kevin J.
1 Feb 2024
President and CEO
Sold after exercise
4,972
$7.02
$34.88K
Knopp Kevin J.
1 Feb 2024
President and CEO
Sold after exercise
4,099
$6.97
$28.58K
Turner Michael S.
1 Feb 2024
Chief Legal & Admin Officer
Sold after exercise
3,616
$6.97
$25.20K
Turner Michael S.
1 Feb 2024
Chief Legal & Admin Officer
Sold after exercise
1,616
$7.03
$11.35K
Griffith Joseph H. IV
1 Feb 2024
Chief Financial Officer
Sold after exercise
3,810
$7.00
$26.68K
Griffith Joseph H. IV
1 Feb 2024
Chief Financial Officer
Sold after exercise
1,888
$7.00
$13.21K
Brown Christopher D.
1 Feb 2023
Chief Technology Officer
Sold after exercise
1,564
$9.17
$14.34K
Fitzpatrick Maura
1 Feb 2023
VP, Product Management & Mktg
Sold after exercise
1,593
$9.20
$14.66K
Griffith Joseph H. IV
1 Feb 2023
Chief Financial Officer
Sold after exercise
1,836
$9.17
$16.84K
Knopp Kevin J.
1 Feb 2023
President and CEO
Sold after exercise
4,049
$9.36
$37.90K
Turner Michael S.
1 Feb 2023
VP, General Counsel
Sold after exercise
1,579
$9.17
$14.48K
Turner Michael S.
17 Aug 2022
VP, General Counsel
Sold after exercise
5,000
$18.15
$90.75K
Griffith Joseph H. IV
4 Aug 2022
Chief Financial Officer
Sold after exercise
12,733
$24.39
$310.56K
Griffith Joseph H. IV
3 Aug 2022
Chief Financial Officer
Sold after exercise
600
$24.29
$14.57K
Turner Michael S.
2 Aug 2022
VP, General Counsel
Sold after exercise
10,000
$23.96
$239.60K
Griffith Joseph H. IV
27 Jun 2022
Chief Financial Officer
Sold after exercise
5,059
$19.08
$96.53K
Griffith Joseph H. IV
24 Jun 2022
Chief Financial Officer
Sold after exercise
13,129
$19.13
$251.16K
Turner Michael S.
23 Jun 2022
VP, General Counsel
Sold after exercise
10,000
$17.90
$179.00K
Griffith Joseph H. IV
21 Jun 2022
Chief Financial Officer
Sold after exercise
8,100
$15.06
$121.99K
Griffith Joseph H. IV
17 Jun 2022
Chief Financial Officer
Sold after exercise
900
$15.01
$13.51K
Griffith Joseph H. IV
15 Jun 2022
Chief Financial Officer
Sold after exercise
1,000
$15.02
$15.02K
Griffith Joseph H. IV
13 Jun 2022
Chief Financial Officer
Sold after exercise
13,334
$13.54
$180.54K
Basarsky Trent A.
12 Apr 2022
VP, Corporate Development
Sold after exercise
200
$20.18
$4.04K
Basarsky Trent A.
12 Apr 2022
VP, Corporate Development
Sold after exercise
14,800
$19.73
$292.00K
Kenneweg John
12 Apr 2022
Vice President, Government
Sold after exercise
9,880
$20.07
$198.29K
Kenneweg John
18 Mar 2022
Vice President, Government
Sold after exercise
19,881
$20.06
$398.81K
Basarsky Trent A.
14 Mar 2022
VP, Corporate Development
Sold after exercise
6,763
$18.23
$123.29K
Basarsky Trent A.
14 Mar 2022
VP, Corporate Development
Sold after exercise
8,237
$17.19
$141.59K
Kenneweg John
11 Mar 2022
Vice President, Government
Sold after exercise
119
$20.00
$2.38K
Basarsky Trent A.
15 Feb 2022
VP, Corporate Development
Sold after exercise
9,292
$15.20
$141.24K
Basarsky Trent A.
14 Feb 2022
VP, Corporate Development
Sold after exercise
5,708
$15.14
$86.42K
Basarsky Trent A.
12 Jan 2022
VP, Corporate Development
Sold after exercise
2,000
$20.32
$40.64K
Basarsky Trent A.
12 Jan 2022
VP, Corporate Development
Sold after exercise
13,000
$19.29
$250.77K
Kenneweg John
11 Jan 2022
Vice President, Government
Sold after exercise
9,300
$20.15
$187.40K
Kenneweg John
10 Jan 2022
Vice President, Government
Sold after exercise
700
$20.04
$14.03K
Kenneweg John
16 Nov 2021
Vice President, Government
Sold after exercise
502
$31.10
$15.61K
Kenneweg John
16 Nov 2021
Vice President, Government
Sold after exercise
9,498
$30.28
$287.60K
Kenneweg John
18 Oct 2021
Vice President, Government
Sold after exercise
10,000
$32.22
$322.20K
Kenneweg John
16 Sep 2021
Vice President, Government
Sold after exercise
10,000
$36.61
$366.10K
Turner Michael S.
9 Sep 2021
VP, General Counsel
Sold after exercise
6,896
$37.05
$255.50K
Turner Michael S.
9 Sep 2021
VP, General Counsel
Sold after exercise
14,952
$36.12
$540.07K
Griffith Joseph H. IV
8 Sep 2021
Chief Financial Officer
Sold after exercise
8,413
$39.07
$328.70K
Griffith Joseph H. IV
8 Sep 2021
Chief Financial Officer
Sold after exercise
6,742
$38.42
$259.03K
Griffith Joseph H. IV
8 Sep 2021
Chief Financial Officer
Sold after exercise
23,940
$37.30
$892.96K
Griffith Joseph H. IV
8 Sep 2021
Chief Financial Officer
Sold after exercise
10,803
$36.66
$396.04K
Basarsky Trent A.
27 Aug 2021
VP, Corporate Development
Sold after exercise
2,003
$34.96
$70.02K
Basarsky Trent A.
25 Aug 2021
VP, Corporate Development
Sold after exercise
1,600
$34.95
$55.92K
Basarsky Trent A.
24 Aug 2021
VP, Corporate Development
Sold after exercise
10,078
$34.95
$352.23K
Basarsky Trent A.
23 Aug 2021
VP, Corporate Development
Sold after exercise
12,135
$34.86
$423.03K
Basarsky Trent A.
23 Aug 2021
VP, Corporate Development
Sold after exercise
3,300
$34.20
$112.86K
Basarsky Trent A.
23 Aug 2021
VP, Corporate Development
Sold after exercise
9,884
$33.16
$327.75K
Kenneweg John
16 Aug 2021
Vice President, Government
Sold after exercise
2,719
$31.02
$84.34K
Kenneweg John
16 Aug 2021
Vice President, Government
Sold after exercise
7,281
$30.24
$220.18K
Basarsky Trent A.
23 Jul 2021
VP, Corporate Development
Sold after exercise
13,893
$32.44
$450.69K
Basarsky Trent A.
23 Jul 2021
VP, Corporate Development
Sold after exercise
7,107
$31.89
$226.64K
Kenneweg John
16 Jul 2021
Vice President, Government
Sold after exercise
734
$33.07
$24.27K
Kenneweg John
16 Jul 2021
Vice President, Government
Sold after exercise
7,250
$32.43
$235.12K
Kenneweg John
16 Jul 2021
Vice President, Government
Sold after exercise
2,016
$31.39
$63.28K
Basarsky Trent A.
25 Jun 2021
VP Corporate Development
Sold after exercise
2,726
$39.90
$108.77K
Basarsky Trent A.
24 Jun 2021
VP Corporate Development
Sold after exercise
9,074
$40.03
$363.23K
BARTHELEMY NICOLAS
24 Jun 2021
VP, Corporate Development
Sold after exercise
4,000
$40.00
$160.00K
Basarsky Trent A.
23 Jun 2021
VP Corporate Development
Sold after exercise
22,637
$39.68
$898.24K
Basarsky Trent A.
23 Jun 2021
VP Corporate Development
Sold after exercise
7,563
$39.14
$296.02K
BARTHELEMY NICOLAS
23 Jun 2021
VP, Corporate Development
Sold after exercise
3,000
$39.53
$118.59K
BARTHELEMY NICOLAS
23 Jun 2021
VP, Corporate Development
Sold after exercise indirect
6,000
$39.63
$237.78K
Kenneweg John
16 Jun 2021
Vice President, Government
Sold after exercise
10,000
$39.27
$392.70K
Show all 250 transactions →

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