MASS
908 DEVICES (MASS)
NASDAQ
$12.69+$0.18 (+1.44%)
Price as of Oct 02, 2026 4:10 PM EDT
  • $517.1M
    Market Cap
  • 42.97%
    1-Year Change
  • Medical Devices
    Industry

Top Holders

Institutional
Mutual Funds
Holder
Ownership %
Shares Held
Change (Shares, %)
Report Date
FIRST LIGHT ASSET MANAGEMENT, LLC
15.31%
6.3M
+210,241 (+3.35%)
Jun 30, 2026
AWM INVESTMENT COMPANY, INC.
11.89%
4.9M
-320,151 (-6.56%)
Jun 30, 2026
ARK INVESTMENT MANAGEMENT LLC
4.94%
2.0M
+81,235 (+4.01%)
Jun 30, 2026
BLACKROCK, INC.
4.74%
1.9M
+176,920 (+9.10%)
Jun 30, 2026
BLACKROCK FUNDING, INC. /DE
4.70%
1.9M
+42,538 (+2.21%)
Dec 31, 2024
NEEDHAM INVESTMENT MANAGEMENT LLC
4.44%
1.8M
+580,620 (+31.89%)
Jun 30, 2026
BLACKROCK INC.
4.13%
1.7M
-39,922 (-2.36%)
Jun 30, 2024

Current Ownership Distribution

  • Institutions416.7M (69.17%)
  • Mutual Funds172.6M (28.65%)
  • Insiders13.1M (2.18%)
  • Other0 (0.00%)

Insider Transactions

  • 2.18% (13.1M)
    Current InsiderOwnership (%, shares)
  • 0
    Number of InsiderBuying (last 12 months)
  • $0.00
    Amount of InsiderBuying (last 12 months)
  • 6
    Number of InsiderSelling (last 12 months)
  • $376.1M
    Amount of InsiderSelling (last 12 months)
Insider Name & Title
Type
Date
Transaction Value
Shares
Share Price
Shares After Transactions
AWM Investment Company, Inc.
Sell
Sep 24, 2026
$272,625.60
24,000
$11.36
4.8M
AWM Investment Company, Inc.
Sell
Sep 23, 2026
$11,250.00
1,000
$11.25
4.8M
Kenneweg John
SVP, Sales & Product Marketing
Exempt
Sep 17, 2026
$0.00
5,257
$0.00
0
Kenneweg John
SVP, Sales & Product Marketing
Exempt
Sep 17, 2026
$5,046.72
5,257
$0.96
63,041
Kenneweg John
SVP, Sales & Product Marketing
Sell
Sep 17, 2026
$53,726.54
5,257
$10.22
57,784
Kenneweg John
SVP, Sales & Product Marketing
Exempt
Sep 16, 2026
$20,543.04
21,399
$0.96
79,183
Kenneweg John
SVP, Sales & Product Marketing
Sell
Sep 16, 2026
$216,343.89
21,399
$10.11
57,784
Kenneweg John
SVP, Sales & Product Marketing
Exempt
Sep 16, 2026
$0.00
21,399
$0.00
5,257
Kenneweg John
SVP, Sales & Product Marketing
Exempt
Sep 15, 2026
$960.00
1,000
$0.96
58,784
Kenneweg John
SVP, Sales & Product Marketing
Sell
Sep 15, 2026
$10,000.00
1,000
$10.00
57,784
Kenneweg John
SVP, Sales & Product Marketing
Exempt
Sep 15, 2026
$0.00
1,000
$0.00
26,656
Brown Christopher D.
Sell
Sep 02, 2026
$317,400.00
30,000
$10.58
775,559
Griffith Joseph H. IV
Chief Financial Officer
Sell
Aug 25, 2026
$125,476.05
11,459
$10.95
121,497
AWM Investment Company, Inc.
Sell
Aug 21, 2026
$441,159.21
41,578
$10.61
4.8M
AWM Investment Company, Inc.
Sell
Aug 20, 2026
$88,638.18
8,422
$10.52
4.8M
Knopp Kevin J.
President and CEO
Sell
Aug 17, 2026
$207,000.00
20,000
$10.35
555,968
Knopp Kevin J.
President and CEO
Sell
Aug 13, 2026
$76,677.32
7,622
$10.06
575,968
Knopp Kevin J.
President and CEO
Sell
Aug 12, 2026
$27,662.29
2,747
$10.07
583,590
Brown Christopher D.
Sell
Aug 11, 2026
$77,144.34
8,358
$9.23
805,559
Knopp Kevin J.
President and CEO
Sell
Aug 11, 2026
$1.1M
115,748
$9.83
616,507
Knopp Kevin J.
President and CEO
Sell
Aug 11, 2026
$306,527.20
30,170
$10.16
586,337
Brown Christopher D.
Sell
Aug 10, 2026
$85,261.26
9,442
$9.03
813,917
Knopp Kevin J.
President and CEO
Sell
Aug 10, 2026
$3,152.88
348
$9.06
732,255
Brown Christopher D.
Sell
Aug 05, 2026
$169,800.00
20,000
$8.49
823,359
AWM Investment Company, Inc.
Sell
Aug 04, 2026
$417,765.00
50,000
$8.36
4.8M
Vann Brandi C
Exempt
Aug 01, 2026
$0.00
5,192
$0.00
10,385
Vann Brandi C
Exempt
Aug 01, 2026
$0.00
5,192
$0.00
5,192
Knopp Kevin J.
President and CEO
Sell
Jul 02, 2026
$2,013.54
222
$9.07
732,603
Brown Christopher D.
Sell
Jul 02, 2026
$19,844.00
2,200
$9.02
843,359
Brown Christopher D.
Sell
Jun 30, 2026
$176,800.00
20,000
$8.84
845,559