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908 Devices Inc.

MASS Net selling
CIK 0001555279 #3233 in the set updated 22 Sep 2026
Bought (120 mo)
$15.99M
out of their own pocket, the only kind of buying there is
Sold (120 mo)
$37.75M
$5.17M on a plan · $13.07M straight out of an exercise
Sold at will
$19.52M
111 of 220 sales
Net
−$21.76M
−$3.52M against sales at will

By person

21 insiders · 253 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
$11.21M
−13.2%
Brown Christopher D.
Director
$7.56M (51)
−$7.56M
775,559
$7.93M
−29.8%
ARCH Venture Fund VII, L.P. entity
10% owner
$6.00M (1)
+$6.00M
5,725,045
$58.51M
CRANDELL KEITH
Director
$6.00M (1)
+$6.00M
5,764,419
$58.91M
Basarsky Trent A.
VP, Corporate Development
$100.00K (1)
$4.99M (22) scheduled
−$4.89M
80,000
$817.60K
+1,233%
Griffith Joseph H. IV
Chief Financial Officer
$4.46M (31) scheduled
−$4.46M
121,497
$1.24M
+28.7%
AWM Investment Company, Inc. entity
10% owner
$3.68M (15)
−$3.68M
9,667,264
$98.80M
−4.2%
Kenneweg John
SVP, Sales & Product Marketing
$3.29M (20) scheduled
−$3.29M
57,784
$590.55K
0.0%
Kedar Sharon
Director
$2.00M (1)
+$2.00M
1,077,091
$11.01M
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
$3.09M
BARTHELEMY NICOLAS
Director
$280.00K (1)
$516.37K (3) scheduled
−$236.37K
28,920
$295.56K
McCallion Kevin J.
SVP, Products and Production
$188.02K (4) scheduled
−$188.02K
44,925
$459.13K
0.0%
Spoto Mark
Director
$87.80K (4)
+$87.80K
258,012
$2.64M
Fitzpatrick Maura
VP, Product Management & Mktg
$14.66K (1) scheduled
−$14.66K
2,834
$28.96K
Hunt Anthony
Director
44,168
$451.40K
ELOI FENEL M
Director
40,897
$417.97K
Leonhart Michele M.
Director
27,054
$276.49K
George Jeffrey P.
Director
26,814
$274.04K
Eisenberg Marcia
Director
25,957
$265.28K
Vann Brandi C
Director
5,192
$53.06K

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
Brown Christopher D.
19 Dec 2024
Chief Product Officer
Exercised, kept
55,131
$1.58
$87.11K
Knopp Kevin J.
13 Dec 2024
President and CEO
Exercised, kept
110,626
$1.58
$174.79K
Knopp Kevin J.
13 Dec 2024
President and CEO
Exercised, kept
47,418
$1.75
$82.98K
Brown Christopher D.
7 Aug 2024
Chief Product Officer
Exercised, kept
6,328
$1.58
$10.00K
Knopp Kevin J.
16 Apr 2024
President and CEO
Exercised, kept
47,000
$1.75
$82.25K
Brown Christopher D.
1 Apr 2024
Chief Product Officer
Exercised, kept
3,600
$1.75
$6.30K
Griffith Joseph H. IV
26 Mar 2024
Chief Financial Officer
Exercised, kept
8,437
$1.58
$13.33K
Knopp Kevin J.
5 Jun 2023
President and CEO
Exercised, kept
28,500
$1.75
$49.88K
Griffith Joseph H. IV
22 Mar 2023
Chief Financial Officer
Exercised, kept
5,000
$1.58
$7.90K
HRUSOVSKY E KEVIN
21 Nov 2022
Director
Exercised, kept
76,016
$0.35
$26.61K
Basarsky Trent A.
27 Apr 2022
VP, Corporate Development
Exercised, kept
5,000
$1.75
$8.75K
Basarsky Trent A.
11 Apr 2022
VP, Corporate Development
Exercised, kept
15,000
$1.75
$26.25K
Basarsky Trent A.
23 Feb 2022
VP, Corporate Development
Exercised, kept
15,000
$1.75
$26.25K
Basarsky Trent A.
7 Dec 2021
VP, Corporate Development
Exercised, kept
10,000
$1.75
$17.50K
Basarsky Trent A.
12 Jul 2021
VP, Corporate Development
Exercised, kept
30,000
$1.75
$52.50K
Showing 250 of 253 transactions. The figures above use every one of them.

What was left out

Form 4 filings counted 241
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 75
Sales at will 111
Transactions with no price 0
Shares from compensation/vesting 15,845,084
Sales filed before the plan box existed 70
History held since 21 Dec 2020