MASS 908 Devices Inc.

NASDAQ
$9.52

908 Devices Inc. (MASS) Insider Activity

What the officers, directors and large holders did with their own shares. Only open-market purchases and sales count toward the totals — grants, option exercises and shares withheld for tax are compensation mechanics, not decisions, and they're listed separately below.

30D 90D 6M 1Y
Insider signal Bearish Selling ran elevated versus MASS's own trailing one-year pace, with 54% of sale value under a prearranged plan.
Cluster activity 0 buyers in the last 30 days 0 buyers in the last 90 days 4 sellers in the last 90 days
Insiders buying
0
0 transactions
Insiders selling
6
47 transactions
Purchases
$0
0 shares
Sales
$8.4M
941,285 shares
Net activity
-$8.4M
purchases less sales

How much of that selling was preplanned? 54% planned / 46% discretionary

10b5-1 plan sales $4.5M 30 transactions · 495,092 shares
Discretionary sales $3.9M 17 transactions · 446,193 shares

Largest single sale: $1.5M.

Where they traded

Buy Sell Dot area is proportional to transaction value.

No open-market insider purchase on record.

Recent open-market activity

Date Insider Role Action Shares Price Value Held after
Brown Christopher D. Director Sell 10b5-1 30,000 $10.58 $317.4K 775,559 −3.7% of holding
Griffith Joseph H. IV Chief Financial Officer Sell 10b5-1 11,459 $10.95 $125.5K 121,497 −8.6% of holding
AWM Investment Company, Inc. 10% Owner Sell 41,578 $10.61 $441.2K 4,779,773 −0.9% of holding
AWM Investment Company, Inc. 10% Owner Sell 8,422 $10.52 $88.6K 4,821,351 −0.2% of holding
Knopp Kevin J. President and CEO Sell 10b5-1 20,000 $10.35 $207.0K 555,968 −3.5% of holding
Knopp Kevin J. President and CEO Sell 10b5-1 7,622 $10.06 $76.7K 575,968 −1.3% of holding
Knopp Kevin J. President and CEO Sell 10b5-1 2,747 $10.07 $27.7K 583,590 −0.5% of holding
Knopp Kevin J. 2 fills President and CEO Sell 10b5-1 145,918 $9.90 $1.4M 616,507 −19.1% of holding
Brown Christopher D. Director Sell 10b5-1 8,358 $9.23 $77.1K 805,559 −1% of holding
Brown Christopher D. Director Sell 10b5-1 9,442 $9.03 $85.3K 813,917 −1.1% of holding
Knopp Kevin J. President and CEO Sell 10b5-1 348 $9.06 $3.2K 732,255 −0% of holding
Brown Christopher D. Director Sell 10b5-1 20,000 $8.49 $169.8K 823,359 −2.4% of holding
AWM Investment Company, Inc. 10% Owner Sell 50,000 $8.36 $417.8K 4,829,773 −1% of holding
Brown Christopher D. Director Sell 10b5-1 2,200 $9.02 $19.8K 843,359 −0.3% of holding
Knopp Kevin J. President and CEO Sell 10b5-1 222 $9.07 $2.0K 732,603 −0% of holding
Brown Christopher D. Director Sell 10b5-1 20,000 $8.84 $176.8K 845,559 −2.3% of holding
Knopp Kevin J. President and CEO Sell 10b5-1 2,798 $9.09 $25.4K 732,825 −0.4% of holding
Knopp Kevin J. President and CEO Sell 10b5-1 16,388 $9.10 $149.1K 735,623 −2.2% of holding
Knopp Kevin J. President and CEO Sell 10b5-1 40,535 $9.14 $370.5K 752,011 −5.1% of holding
Brown Christopher D. Director Sell 10b5-1 9,900 $9.04 $89.5K 865,559 −1.1% of holding
Knopp Kevin J. President and CEO Sell 10b5-1 3,422 $9.06 $31.0K 792,546 −0.4% of holding
AWM Investment Company, Inc. 10% Owner Sell 3,050 $9.00 $27.5K 4,879,773 −0.1% of holding
AWM Investment Company, Inc. 10% Owner Sell 4,668 $8.99 $42.0K 4,882,823 −0.1% of holding
AWM Investment Company, Inc. 10% Owner Sell 39,782 $8.97 $356.9K 4,887,491 −0.8% of holding
Brown Christopher D. Director Sell 10b5-1 100 $9.00 $900 875,459 −0% of holding
Brown Christopher D. Director Sell 10b5-1 20,000 $8.73 $174.6K 875,559 −2.2% of holding
AWM Investment Company, Inc. 10% Owner Sell 2,500 $8.95 $22.4K 4,927,273 −0.1% of holding
AWM Investment Company, Inc. 10% Owner Sell 170,442 $8.66 $1.5M 4,929,773 −3.3% of holding
Brown Christopher D. Director Sell 10b5-1 30,000 $9.00 $270.0K 895,559 −3.2% of holding
Griffith Joseph H. IV Chief Financial Officer Sell 10b5-1 6,940 $9.03 $62.7K 132,956 −5% of holding
AWM Investment Company, Inc. 2 fills 10% Owner Sell 16,500 $8.25 $136.2K 5,115,215 −0.3% of holding
AWM Investment Company, Inc. 10% Owner Sell 5,000 $8.25 $41.3K 5,116,715 −0.1% of holding
Kenneweg John SVP, Sales & Product Marketing Sell 18,255 $8.11 $148.0K 57,784 −24% of holding
AWM Investment Company, Inc. 10% Owner Sell 3,025 $8.20 $24.8K 5,121,715 −0.1% of holding
AWM Investment Company, Inc. 10% Owner Sell 12,819 $8.20 $105.2K 5,124,740 −0.2% of holding
AWM Investment Company, Inc. 2 fills 10% Owner Sell 62,365 $8.05 $502.2K 5,194,924 −1.2% of holding
Brown Christopher D. Director Sell 10b5-1 20,000 $7.23 $144.6K 925,559 −2.1% of holding
Kenneweg John SVP, Sales & Product Marketing Sell 7,787 $6.83 $53.2K 76,039 −9.3% of holding
Brown Christopher D. Director Sell 10b5-1 17,578 $7.07 $124.3K 945,559 −1.8% of holding
McCallion Kevin J. SVP, Products and Production Sell 10b5-1 2,693 $7.01 $18.9K 44,925 −5.7% of holding
Brown Christopher D. Director Sell 10b5-1 7,392 $7.04 $52.0K 963,137 −0.8% of holding
McCallion Kevin J. SVP, Products and Production Sell 10b5-1 5,420 $7.03 $38.1K 44,925 −10.8% of holding
McCallion Kevin J. SVP, Products and Production Sell 10b5-1 18,580 $7.05 $131.0K 44,925 −29.3% of holding
Brown Christopher D. Director Sell 10b5-1 15,030 $7.05 $106.0K 970,529 −1.5% of holding

Form 4s are due within two business days of a transaction, so this is close to real time — unlike the quarterly 13F data on the Institutional tab. A single large sale often reflects a prearranged 10b5-1 plan rather than a fresh view, so read a pattern of sales rather than any one of them.