Brown Christopher D.
Director
Sale 10b5-1
- Shares
- 30,000
- Price
- $11.89
- Value
- $356,700
SEC EDGAR · Forms 3/4/5Updated through Oct 30, 2026•59 filings
MASS
908 Devices Inc.
Net sales of $4.7M over the last 3 months
5 sellers account for the net balance. There is no cluster of three distinct buyers within 30 days. We found no CEO/CFO purchases over 12 months.
How to read this signal
Only open-market P purchases and S sales count toward the signal. Vesting, options, taxes and gifts remain in the source data but do not trigger alerts. Rule 10b5-1 trades are shown as informational.
3-month balance
−$4,674,585
0 buyers · 5 sellers
12-month purchases
$0.00
0 distinct insiders
12-month sales
$9,544,046
6 distinct insiders
Highlighted alerts
19
39 Rule 10b5-1 trades treated as informational
Buying cluster · 30 days
Fewer than three distinct buyers
CEO/CFO purchases · 12 months
No executive purchases found
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Form 4 raw → Raspberry
The value is in what we do not call a signal.
The SEC XML stores every transaction. Raspberry keeps that evidence, reads the footnotes and separates voluntary open-market activity from vesting, option exercises, gifts, tax withholding, stock purchase and dividend reinvestment plans and pre-programmed 10b5-1 trades.
100
Raw transactions
Everything returned by the filing
58
Voluntary view
P/S trades after deterministic checks
48
Administrative noise
Stored, never alerted
45
10b5-1
Shown as informational
SEC ownership XML facts
- Code
- S
- Shares
- 7,787
- Price
- $6.83
- Footnotes
- 3
Each performance stock unit ("PSU") represents a contingent right to receive one share of Common Stock, par value $0.001, when vested. The sale reported on this Form 4 represents shares sold by the Reporting Person to cover tax withholding obligations in connection with the vesting and settlement of PSUs. The sale is mandated by the Issuer's election to require the satisfaction of tax withholding obligations to be funded by a "sell to cover" transaction and does not represent a discretionary transaction by the Reporting Person. The PSUs vested, in accordance with their terms, on May 1, 2026. The PSUs had no expiration date.
Raspberry interpretation
Informational — no alert
Reason: tax_withholding. The filing footnotes identify tax withholding.
Recent transactions
Voluntary purchases and sales; administrative noise stays hidden.
Griffith Joseph H. IV
Chief Financial Officer
Sale 10b5-1
- Shares
- 5,000
- Price
- $13.03
- Value
- $65,150
AWM Investment Company, Inc.
10% owner
SaleAlert
- Shares
- 18,000
- Price
- $11.52
- Value
- $207,322
AWM Investment Company, Inc.
10% owner
SaleAlert
- Shares
- 24,000
- Price
- $11.36
- Value
- $272,626
AWM Investment Company, Inc.
10% owner
SaleAlert
- Shares
- 1,000
- Price
- $11.25
- Value
- $11,250
Kenneweg John
SVP, Sales & Product Marketing
Sale 10b5-1
- Shares
- 5,257
- Price
- $10.22
- Value
- $53,727
Kenneweg John
SVP, Sales & Product Marketing
Sale 10b5-1
- Shares
- 21,399
- Price
- $10.11
- Value
- $216,344
Kenneweg John
SVP, Sales & Product Marketing
Sale 10b5-1
- Shares
- 1,000
- Price
- $10.00
- Value
- $10,000
Brown Christopher D.
Director
Sale 10b5-1
- Shares
- 30,000
- Price
- $10.58
- Value
- $317,400
Griffith Joseph H. IV
Chief Financial Officer
Sale 10b5-1
- Shares
- 11,459
- Price
- $10.95
- Value
- $125,476
AWM Investment Company, Inc.
10% owner
SaleAlert
- Shares
- 41,578
- Price
- $10.61
- Value
- $441,159
AWM Investment Company, Inc.
10% owner
SaleAlert
- Shares
- 8,422
- Price
- $10.52
- Value
- $88,638
Knopp Kevin J.
President and CEO
Sale 10b5-1
- Shares
- 20,000
- Price
- $10.35
- Value
- $207,000
Knopp Kevin J.
President and CEO
Sale 10b5-1
- Shares
- 7,622
- Price
- $10.06
- Value
- $76,677
Knopp Kevin J.
President and CEO
Sale 10b5-1
- Shares
- 2,747
- Price
- $10.07
- Value
- $27,662
Brown Christopher D.
Director
Sale 10b5-1
- Shares
- 8,358
- Price
- $9.23
- Value
- $77,144
Knopp Kevin J.
President and CEO
Sale 10b5-1
- Shares
- 30,170
- Price
- $10.16
- Value
- $306,527
Knopp Kevin J.
President and CEO
Sale 10b5-1
- Shares
- 115,748
- Price
- $9.83
- Value
- $1,137,803
Brown Christopher D.
Director
Sale 10b5-1
- Shares
- 9,442
- Price
- $9.03
- Value
- $85,261
Knopp Kevin J.
President and CEO
Sale 10b5-1
- Shares
- 348
- Price
- $9.06
- Value
- $3,153
Brown Christopher D.
Director
Sale 10b5-1
- Shares
- 20,000
- Price
- $8.49
- Value
- $169,800
AWM Investment Company, Inc.
10% owner
SaleAlert
- Shares
- 50,000
- Price
- $8.36
- Value
- $417,765
Brown Christopher D.
Director
Sale 10b5-1
- Shares
- 2,200
- Price
- $9.02
- Value
- $19,844
Knopp Kevin J.
President and CEO
Sale 10b5-1
- Shares
- 222
- Price
- $9.07
- Value
- $2,014
Brown Christopher D.
Director
Sale 10b5-1
- Shares
- 20,000
- Price
- $8.84
- Value
- $176,800
Knopp Kevin J.
President and CEO
Sale 10b5-1
- Shares
- 2,798
- Price
- $9.09
- Value
- $25,434
Knopp Kevin J.
President and CEO
Sale 10b5-1
- Shares
- 16,388
- Price
- $9.10
- Value
- $149,131
Knopp Kevin J.
President and CEO
Sale 10b5-1
- Shares
- 40,535
- Price
- $9.14
- Value
- $370,490
Brown Christopher D.
Director
Sale 10b5-1
- Shares
- 9,900
- Price
- $9.04
- Value
- $89,496
Knopp Kevin J.
President and CEO
Sale 10b5-1
- Shares
- 3,422
- Price
- $9.06
- Value
- $31,003
AWM Investment Company, Inc.
10% owner
SaleAlert
- Shares
- 3,050
- Price
- $9.00
- Value
- $27,463
AWM Investment Company, Inc.
10% owner
SaleAlert
- Shares
- 4,668
- Price
- $8.99
- Value
- $41,965
Brown Christopher D.
Director
Sale 10b5-1
- Shares
- 100
- Price
- $9.00
- Value
- $900.00
AWM Investment Company, Inc.
10% owner
SaleAlert
- Shares
- 39,782
- Price
- $8.97
- Value
- $356,856
Brown Christopher D.
Director
Sale 10b5-1
- Shares
- 20,000
- Price
- $8.73
- Value
- $174,600
AWM Investment Company, Inc.
10% owner
SaleAlert
- Shares
- 2,500
- Price
- $8.95
- Value
- $22,375
Brown Christopher D.
Director
Sale 10b5-1
- Shares
- 30,000
- Price
- $9.00
- Value
- $270,000
AWM Investment Company, Inc.
10% owner
SaleAlert
- Shares
- 170,442
- Price
- $8.66
- Value
- $1,475,925
Griffith Joseph H. IV
Chief Financial Officer
Sale 10b5-1
- Shares
- 6,940
- Price
- $9.03
- Value
- $62,668
AWM Investment Company, Inc.
10% owner
SaleAlert
- Shares
- 15,000
- Price
- $8.25
- Value
- $123,791
AWM Investment Company, Inc.
10% owner
SaleAlert
- Shares
- 1,500
- Price
- $8.25
- Value
- $12,375
AWM Investment Company, Inc.
10% owner
SaleAlert
- Shares
- 5,000
- Price
- $8.25
- Value
- $41,257
Kenneweg John
SVP, Sales & Product Marketing
SaleAlert
- Shares
- 18,255
- Price
- $8.11
- Value
- $148,048
AWM Investment Company, Inc.
10% owner
SaleAlert
- Shares
- 3,025
- Price
- $8.20
- Value
- $24,805
AWM Investment Company, Inc.
10% owner
SaleAlert
- Shares
- 12,819
- Price
- $8.20
- Value
- $105,170
Brown Christopher D.
Director
Sale 10b5-1
- Shares
- 20,000
- Price
- $7.23
- Value
- $144,600
AWM Investment Company, Inc.
10% owner
SaleAlert
- Shares
- 57,365
- Price
- $8.06
- Value
- $462,155
AWM Investment Company, Inc.
10% owner
SaleAlert
- Shares
- 5,000
- Price
- $8.00
- Value
- $40,000
McCallion Kevin J.
SVP, Products and Production
Sale 10b5-1
- Shares
- 2,693
- Price
- $7.01
- Value
- $18,878
Brown Christopher D.
Director
Sale 10b5-1
- Shares
- 17,578
- Price
- $7.07
- Value
- $124,276
McCallion Kevin J.
SVP, Products and Production
Sale 10b5-1
- Shares
- 5,420
- Price
- $7.03
- Value
- $38,103
Brown Christopher D.
Director
Sale 10b5-1
- Shares
- 7,392
- Price
- $7.04
- Value
- $52,040
McCallion Kevin J.
SVP, Products and Production
Sale 10b5-1
- Shares
- 18,580
- Price
- $7.05
- Value
- $130,989
Brown Christopher D.
Director
Sale 10b5-1
- Shares
- 15,030
- Price
- $7.05
- Value
- $105,962
McCallion Kevin J.
SVP, Products and Production
Sale 10b5-1
- Shares
- 7
- Price
- $7.00
- Value
- $49.00
Griffith Joseph H. IV
Chief Financial Officer
Sale 10b5-1
- Shares
- 4,292
- Price
- $9.05
- Value
- $38,849
Griffith Joseph H. IV
Chief Financial Officer
Sale 10b5-1
- Shares
- 708
- Price
- $9.04
- Value
- $6,398
Griffith Joseph H. IV
Chief Financial Officer
Sale 10b5-1
- Shares
- 5,000
- Price
- $7.07
- Value
- $35,339
| Date | Insider | Transaction | Shares | Price | Value | Reading |
|---|---|---|---|---|---|---|
| Oct 07, 2026 | Brown Christopher D. Director | Sale | 30,000 | $11.89 | $356,700 | |
| Oct 06, 2026 | Griffith Joseph H. IV Chief Financial Officer | Sale | 5,000 | $13.03 | $65,150 | |
| Sep 29, 2026 | AWM Investment Company, Inc. 10% owner | Sale | 18,000 | $11.52 | $207,322 | |
| Sep 24, 2026 | AWM Investment Company, Inc. 10% owner | Sale | 24,000 | $11.36 | $272,626 | |
| Sep 23, 2026 | AWM Investment Company, Inc. 10% owner | Sale | 1,000 | $11.25 | $11,250 | |
| Sep 17, 2026 | Kenneweg John SVP, Sales & Product Marketing | Sale | 5,257 | $10.22 | $53,727 | |
| Sep 16, 2026 | Kenneweg John SVP, Sales & Product Marketing | Sale | 21,399 | $10.11 | $216,344 | |
| Sep 15, 2026 | Kenneweg John SVP, Sales & Product Marketing | Sale | 1,000 | $10.00 | $10,000 | |
| Sep 02, 2026 | Brown Christopher D. Director | Sale | 30,000 | $10.58 | $317,400 | |
| Aug 25, 2026 | Griffith Joseph H. IV Chief Financial Officer | Sale | 11,459 | $10.95 | $125,476 | |
| Aug 21, 2026 | AWM Investment Company, Inc. 10% owner | Sale | 41,578 | $10.61 | $441,159 | |
| Aug 20, 2026 | AWM Investment Company, Inc. 10% owner | Sale | 8,422 | $10.52 | $88,638 | |
| Aug 17, 2026 | Knopp Kevin J. President and CEO | Sale | 20,000 | $10.35 | $207,000 | |
| Aug 13, 2026 | Knopp Kevin J. President and CEO | Sale | 7,622 | $10.06 | $76,677 | |
| Aug 12, 2026 | Knopp Kevin J. President and CEO | Sale | 2,747 | $10.07 | $27,662 | |
| Aug 11, 2026 | Brown Christopher D. Director | Sale | 8,358 | $9.23 | $77,144 | |
| Aug 11, 2026 | Knopp Kevin J. President and CEO | Sale | 30,170 | $10.16 | $306,527 | |
| Aug 11, 2026 | Knopp Kevin J. President and CEO | Sale | 115,748 | $9.83 | $1,137,803 | |
| Aug 10, 2026 | Brown Christopher D. Director | Sale | 9,442 | $9.03 | $85,261 | |
| Aug 10, 2026 | Knopp Kevin J. President and CEO | Sale | 348 | $9.06 | $3,153 | |
| Aug 05, 2026 | Brown Christopher D. Director | Sale | 20,000 | $8.49 | $169,800 | |
| Aug 04, 2026 | AWM Investment Company, Inc. 10% owner | Sale | 50,000 | $8.36 | $417,765 | |
| Jul 02, 2026 | Brown Christopher D. Director | Sale | 2,200 | $9.02 | $19,844 | |
| Jul 02, 2026 | Knopp Kevin J. President and CEO | Sale | 222 | $9.07 | $2,014 | |
| Jun 30, 2026 | Brown Christopher D. Director | Sale | 20,000 | $8.84 | $176,800 | |
| Jun 26, 2026 | Knopp Kevin J. President and CEO | Sale | 2,798 | $9.09 | $25,434 | |
| Jun 25, 2026 | Knopp Kevin J. President and CEO | Sale | 16,388 | $9.10 | $149,131 | |
| Jun 24, 2026 | Knopp Kevin J. President and CEO | Sale | 40,535 | $9.14 | $370,490 | |
| Jun 23, 2026 | Brown Christopher D. Director | Sale | 9,900 | $9.04 | $89,496 | |
| Jun 23, 2026 | Knopp Kevin J. President and CEO | Sale | 3,422 | $9.06 | $31,003 | |
| Jun 23, 2026 | AWM Investment Company, Inc. 10% owner | Sale | 3,050 | $9.00 | $27,463 | |
| Jun 22, 2026 | AWM Investment Company, Inc. 10% owner | Sale | 4,668 | $8.99 | $41,965 | |
| Jun 04, 2026 | Brown Christopher D. Director | Sale | 100 | $9.00 | $900.00 | |
| Jun 04, 2026 | AWM Investment Company, Inc. 10% owner | Sale | 39,782 | $8.97 | $356,856 | |
| Jun 03, 2026 | Brown Christopher D. Director | Sale | 20,000 | $8.73 | $174,600 | |
| Jun 02, 2026 | AWM Investment Company, Inc. 10% owner | Sale | 2,500 | $8.95 | $22,375 | |
| May 28, 2026 | Brown Christopher D. Director | Sale | 30,000 | $9.00 | $270,000 | |
| May 28, 2026 | AWM Investment Company, Inc. 10% owner | Sale | 170,442 | $8.66 | $1,475,925 | |
| May 28, 2026 | Griffith Joseph H. IV Chief Financial Officer | Sale | 6,940 | $9.03 | $62,668 | |
| May 27, 2026 | AWM Investment Company, Inc. 10% owner | Sale | 15,000 | $8.25 | $123,791 | |
| May 27, 2026 | AWM Investment Company, Inc. 10% owner | Sale | 1,500 | $8.25 | $12,375 | |
| May 11, 2026 | AWM Investment Company, Inc. 10% owner | Sale | 5,000 | $8.25 | $41,257 | |
| May 08, 2026 | Kenneweg John SVP, Sales & Product Marketing | Sale | 18,255 | $8.11 | $148,048 | |
| May 08, 2026 | AWM Investment Company, Inc. 10% owner | Sale | 3,025 | $8.20 | $24,805 | |
| May 07, 2026 | AWM Investment Company, Inc. 10% owner | Sale | 12,819 | $8.20 | $105,170 | |
| May 06, 2026 | Brown Christopher D. Director | Sale | 20,000 | $7.23 | $144,600 | |
| May 06, 2026 | AWM Investment Company, Inc. 10% owner | Sale | 57,365 | $8.06 | $462,155 | |
| May 06, 2026 | AWM Investment Company, Inc. 10% owner | Sale | 5,000 | $8.00 | $40,000 | |
| Apr 10, 2026 | McCallion Kevin J. SVP, Products and Production | Sale | 2,693 | $7.01 | $18,878 | |
| Apr 10, 2026 | Brown Christopher D. Director | Sale | 17,578 | $7.07 | $124,276 | |
| Apr 09, 2026 | McCallion Kevin J. SVP, Products and Production | Sale | 5,420 | $7.03 | $38,103 | |
| Apr 09, 2026 | Brown Christopher D. Director | Sale | 7,392 | $7.04 | $52,040 | |
| Apr 08, 2026 | McCallion Kevin J. SVP, Products and Production | Sale | 18,580 | $7.05 | $130,989 | |
| Apr 08, 2026 | Brown Christopher D. Director | Sale | 15,030 | $7.05 | $105,962 | |
| Mar 02, 2026 | McCallion Kevin J. SVP, Products and Production | Sale | 7 | $7.00 | $49.00 | |
| Oct 03, 2025 | Griffith Joseph H. IV Chief Financial Officer | Sale | 4,292 | $9.05 | $38,849 | |
| Oct 02, 2025 | Griffith Joseph H. IV Chief Financial Officer | Sale | 708 | $9.04 | $6,398 | |
| Sep 19, 2025 | Griffith Joseph H. IV Chief Financial Officer | Sale | 5,000 | $7.07 | $35,339 |
“Alert” means a voluntary, unscheduled transaction according to the filing; it is not an investment recommendation. Official source: SEC EDGAR.