908 Devices Inc.
US ˙ NasdaqGM ˙ US65443P1021

Introduction

This page provides a comprehensive analysis of the known insider trading history of Knopp Kevin J.. Insiders are officers, directors, or significant investors in a company. It is illegal for insiders to make trades in their companies based on specific, non-public information. This does not mean it is illegal for them to make any trades in their own companies. However, they must report all trades to the SEC via a Form 4. Despite these restrictions, academic research suggests that insiders - in general - tend to outperform the market in their own companies.

Average Trade Profitability

The average trade profitability is the average return of all the open market purchases made by the insider in the last three years. To calculate this, we examine every open-market, unplanned purchase made by the insider, excluding all trades that were marked as part of a 10b5-1 trading plan. We then calculate the average performance of those trades over 3, 6, and 12 months, averaging each of those durations to generate a final performance metric for each trade. Finally, we average all of the performance metrics to calculate a performance metric for the insider. This list only includes insiders that have made at least three trades in the last two years.

If this insiders trade profitability is "N/A", then the insider either has not made any open-market purchases in the last three years, or the trades they’ve made are too recent to calculate a reliable performance metric.

Update Frequency: Daily

See the list of most profitable insider traders.

Companies with Reported Insider Positions

The SEC filings indicate Knopp Kevin J. has reported holdings or trades in the following companies:

Security Title Latest Reported Holdings
US:MASS / 908 Devices Inc. President and CEO, Director 722,733
How to Interpret the Charts

The following charts show the stock performance of securities subsequent to each open-market, non-planned trade made by Knopp Kevin J.. Non-planned trade are trades that were not made as part of a 10b5-1 trading plan. The stock performance is charted as cumulative percent change in share price. For example, if an insider trade was made on January 1, 2019, the chart will show the daily percent change of the security to the present day. If the share price were to go from $10 to $15 during this time, the cumulative percent change in share price would be 50%. A change in price from $10 to $20 would be 100%, and a change in price of $10 to $5 would be -50%.

Ultimately, we are trying to determine how closely the insider’s trades correlate to excess returns (positive or negative) in the share price in order to see if the insider is timing their trades to profit from insider information. Consider the situation where an insider was doing this. In this situation, we would expect either (a) positive returns after purchases, or (b) negative returns after sales. In the case of (a), the PURCHASE chart would show a series of upwardly sloping curves, indicating positive returns after each purchase transaction. In the case of (b), the SALE chart would show a series of downward sloping curves, indicating negative returns after each sale transaction.

However, this alone is not enough to draw conclusions. If, for example, the share price of the company was in a non-cyclical climb over many years, then we would expect all the post-purchase plots to be upwardly sloping. Likewise, non-cyclical declines over many years would result in downward sloping post-trade plots. Neither of these charts would suggest insider trading activity.

The strongest indicator would be a situation where the share price was extremely cyclical, and there were both positive signals in the PURCHASE chart and negative plots on the SALE chart. This situation would be highly suggestive of an insider that was timing trades to their financial advantage.

Insider Purchases MASS / 908 Devices Inc. - Short Term Profit Analysis

In this section, we analyze the profitability of every unplanned, open-market insider purchase made in MASS / 908 Devices Inc.. This analysis helps to understand if the insider consistently generates abnormal returns, and is worth following. This analysis is for one-year following each trade, and the results are theoretical.

The following table shows the most recent open market purchases that were not part of an automatic trading plan.

Trade Date Ticker Insider Reported
Shares
Reported
Price
Adjusted
Shares
Adjusted
Price
Cost Basis Days to
Max
Price at
Max
Max
Profit ($)
Max Return (%)
2025-05-15 MASS Knopp Kevin J. 15,000 4.4397 15,000 4.4397 66,596 34 7.9700 52,955 79.52
2025-05-14 MASS Knopp Kevin J. 15,000 4.3192 15,000 4.3192 64,788
2024-05-13 MASS Knopp Kevin J. 10,000 6.4200 10,000 6.4200 64,200
2024-05-10 MASS Knopp Kevin J. 10,000 5.7700 10,000 5.7700 57,700
2024-05-09 MASS Knopp Kevin J. 10,000 5.8300 10,000 5.8300 58,300
2024-05-08 MASS Knopp Kevin J. 10,000 5.7200 10,000 5.7200 57,200
2024-05-07 MASS Knopp Kevin J. 10,000 5.6000 10,000 5.6000 56,000

Adjusted Price is the split-adjusted price. Adjusted Shares is the split-adjusted shares.

MASS / 908 Devices Inc. Insider Trades
Insider Sales MASS / 908 Devices Inc. - Short Term Loss Analysis

In this section, we analyze the short-term loss avoidance of every unplanned, open-market insider sale made in MASS / 908 Devices Inc.. A consistent pattern of loss avoidance may suggest that future sale transactions may predict declines in price. This analysis is for one-year following each trade, and the results are theoretical.

The following table shows the most recent open market sales that were not part of an automatic trading plan.

Trade Date Ticker Insider Reported
Shares
Reported
Price
Adjusted
Shares
Adjusted
Price
Cost Basis Days to
Min
Price at
Min
Max Loss
Avoided ($)
Max Loss
Avoided (%)
2025-02-03 MASS Knopp Kevin J. 4,318 2.3307 4,318 2.3307 10,064 28 1.9800 -1,513 -15.04
2025-02-03 MASS Knopp Kevin J. 5,159 2.3107 5,159 2.3107 11,921
2025-02-03 MASS Knopp Kevin J. 6,524 2.3183 6,524 2.3183 15,125
2024-02-01 MASS Knopp Kevin J. 4,099 6.9716 4,099 6.9716 28,577
2024-02-01 MASS Knopp Kevin J. 4,972 7.0161 4,972 7.0161 34,884
2023-02-01 MASS Knopp Kevin J. 4,049 9.3600 4,049 9.3600 37,899

Adjusted Price is the split-adjusted price. Adjusted Shares is the split-adjusted shares.

MASS / 908 Devices Inc. Insider Trades
Insider Trading History

This table shows the complete list of insider trades made by Knopp Kevin J. as disclosed to the Securities Exchange Commission (SEC).

File Date Tran Date Form Ticker Security Code 10b5-1 Shares Remaining Shares Percent
Change
Share
Price
Tran
Value
Remaining
Value
2025-05-19 2025-05-15 4 MASS 908 Devices Inc.
Common Stock
P - Purchase 15,000 722,733 2.12 4.44 66,596 3,208,718
2025-05-14 2025-05-14 4 MASS 908 Devices Inc.
Common Stock
P - Purchase 15,000 707,733 2.17 4.32 64,788 3,056,840
2025-02-04 2025-02-03 4 MASS 908 Devices Inc.
Common Stock
S - Sale -6,524 692,733 -0.93 2.32 -15,125 1,605,963
2025-02-04 2025-02-03 4 MASS 908 Devices Inc.
Common Stock
S - Sale -5,159 699,257 -0.73 2.31 -11,921 1,615,773
2025-02-04 2025-02-03 4 MASS 908 Devices Inc.
Common Stock
S - Sale -4,318 704,416 -0.61 2.33 -10,064 1,641,782
2025-02-04 2025-02-01 4 MASS 908 Devices Inc.
Common Stock
M - Exercise 17,007 708,734 2.46
2025-02-04 2025-02-01 4 MASS 908 Devices Inc.
Common Stock
M - Exercise 13,448 691,727 1.98
2025-02-04 2025-02-01 4 MASS 908 Devices Inc.
Common Stock
M - Exercise 11,254 678,279 1.69
2024-12-16 2024-12-13 4 MASS 908 Devices Inc.
Common Stock
M - Exercise 110,626 667,025 19.88 1.58 174,789 1,053,900
2024-12-16 2024-12-13 4 MASS 908 Devices Inc.
Common Stock
M - Exercise 47,418 556,399 9.32 1.75 82,982 973,698
2024-05-13 2024-05-13 4 MASS 908 Devices Inc.
Common Stock
P - Purchase 10,000 508,981 2.00 6.42 64,200 3,267,658
2024-05-10 2024-05-10 4 MASS 908 Devices Inc.
Common Stock
P - Purchase 10,000 498,981 2.05 5.77 57,700 2,879,120
2024-05-09 2024-05-09 4 MASS 908 Devices Inc.
Common Stock
P - Purchase 10,000 488,981 2.09 5.83 58,300 2,850,759
2024-05-08 2024-05-08 4 MASS 908 Devices Inc.
Common Stock
P - Purchase 10,000 478,981 2.13 5.72 57,200 2,739,771
2024-05-07 2024-05-07 4 MASS 908 Devices Inc.
Common Stock
P - Purchase 10,000 468,981 2.18 5.60 56,000 2,626,294
2024-04-16 2024-04-16 4 MASS 908 Devices Inc.
Common Stock
M - Exercise 47,000 458,981 11.41 1.75 82,250 803,217
2024-02-02 2024-02-01 4 MASS 908 Devices Inc.
Common Stock
S - Sale -4,972 411,981 -1.19 7.02 -34,884 2,890,500
2024-02-02 2024-02-01 4 MASS 908 Devices Inc.
Common Stock
S - Sale -4,099 416,953 -0.97 6.97 -28,577 2,906,830
2024-02-02 2024-02-01 4 MASS 908 Devices Inc.
Common Stock
M - Exercise 13,449 421,052 3.30
2024-02-02 2024-02-01 4 MASS 908 Devices Inc.
Common Stock
M - Exercise 11,255 407,603 2.84
2023-06-05 2023-06-05 4 MASS 908 Devices Inc.
Common Stock
M - Exercise 28,500 396,348 7.75 1.75 49,875 693,609
2023-05-25 2023-05-23 4 MASS 908 Devices Inc.
Common Stock, par value $0.001
S - Sale X -60,000 367,848 -14.02 10.12 -607,200 3,722,622
2023-02-17 2023-02-16 4 MASS 908 Devices Inc.
Common Stock, par value $0.001
S - Sale X -4,842 427,848 -1.12 10.12 -49,001 4,329,822
2023-02-17 2023-02-15 4 MASS 908 Devices Inc.
Common Stock, par value $0.001
S - Sale X -15,158 432,690 -3.38 10.29 -155,976 4,452,380
2023-02-03 2023-02-02 4 MASS 908 Devices Inc.
Common Stock
S - Sale X -40,000 447,848 -8.20 10.51 -420,400 4,706,882
2023-02-03 2023-02-01 4 MASS 908 Devices Inc.
Common Stock
S - Sale -4,049 487,848 -0.82 9.36 -37,899 4,566,257
2023-02-03 2023-02-01 4 MASS 908 Devices Inc.
Common Stock
M - Exercise 11,255 491,897 2.34
2022-11-17 2022-11-15 4 MASS 908 Devices Inc.
Common Stock, par value $0.001
S - Sale X -1,013 480,642 -0.21 12.40 -12,561 5,959,961
2022-11-17 2022-11-15 4 MASS 908 Devices Inc.
Common Stock, par value $0.001
S - Sale X -6,619 481,655 -1.36 11.76 -77,839 5,664,263
2022-11-17 2022-11-15 4 MASS 908 Devices Inc.
Common Stock, par value $0.001
S - Sale X -12,368 488,274 -2.47 10.54 -130,359 5,146,408
2022-10-19 2022-10-18 4 MASS 908 Devices Inc.
Common Stock, par value $0.001
S - Sale X -18,800 500,642 -3.62 15.32 -288,016 7,669,835
2022-10-19 2022-10-17 4 MASS 908 Devices Inc.
Common Stock, par value $0.001
S - Sale X -11,200 519,442 -2.11 14.68 -164,416 7,625,409
2022-09-19 2022-09-15 4 MASS 908 Devices Inc.
Common Stock, par value $0.001
S - Sale X -30,000 530,642 -5.35 16.94 -508,200 8,989,075
2022-08-17 2022-08-15 4 MASS 908 Devices Inc.
Common Stock, par value $0.001
S - Sale X -2,373 560,642 -0.42 19.72 -46,796 11,055,860
2022-08-17 2022-08-15 4 MASS 908 Devices Inc.
Common Stock, par value $0.001
S - Sale X -27,627 563,015 -4.68 19.23 -531,267 10,826,778
2022-08-09 2022-08-08 4 MASS 908 Devices Inc.
Common Stock, par value $0.001
S - Sale X -286 590,642 -0.05 25.17 -7,199 14,866,459
2022-08-09 2022-08-05 4 MASS 908 Devices Inc.
Common Stock, par value $0.001
S - Sale X -25,910 590,928 -4.20 25.32 -656,041 14,962,297
2022-08-01 2022-08-01 4 MASS 908 Devices Inc.
Common Stock, par value $0.001
S - Sale X -14,647 616,838 -2.32 22.46 -328,972 13,854,181
2022-08-01 2022-07-29 4 MASS 908 Devices Inc.
Common Stock, par value $0.001
S - Sale X -18,000 631,485 -2.77 22.22 -399,960 14,031,597
2022-08-01 2022-07-28 4 MASS 908 Devices Inc.
Common Stock, par value $0.001
S - Sale X -5,700 649,485 -0.87 22.01 -125,457 14,295,165
2022-07-25 2022-07-21 4 MASS 908 Devices Inc.
Common Stock, par value $0.001
S - Sale X -200 655,185 -0.03 22.04 -4,408 14,440,277
2022-07-19 2022-07-15 4 MASS 908 Devices Inc.
Common Stock, par value $0.001
S - Sale X -18,231 655,385 -2.71 17.74 -323,418 11,626,530
2022-07-19 2022-07-15 4 MASS 908 Devices Inc.
Common Stock, par value $0.001
S - Sale X -11,769 673,616 -1.72 16.80 -197,719 11,316,749
2022-07-08 2022-07-08 4 MASS 908 Devices Inc.
Common Stock, par value $0.001
S - Sale X -453 685,385 -0.07 22.06 -9,993 15,119,593
2022-07-08 2022-07-06 4 MASS 908 Devices Inc.
Common Stock, par value $0.001
S - Sale X -1,000 685,838 -0.15 22.07 -22,070 15,136,445
2022-06-22 2022-06-21 4 MASS 908 Devices Inc.
Common Stock, par value $0.001
S - Sale X -9,200 686,838 -1.32 15.07 -138,644 10,350,649
2022-06-17 2022-06-15 4 MASS 908 Devices Inc.
Common Stock, par value $0.001
S - Sale X -2,000 696,038 -0.29 15.01 -30,020 10,447,530
2022-06-17 2022-06-15 4 MASS 908 Devices Inc.
Common Stock, par value $0.001
S - Sale X -18,800 698,038 -2.62 14.62 -274,856 10,205,316
2022-03-03 2022-03-01 4 MASS 908 Devices Inc.
Restricted Stock Unit
A - Award 45,019 45,019
2022-03-03 2022-03-01 4 MASS 908 Devices Inc.
Stock Option (option to buy)
A - Award 74,776 74,776
2021-11-02 2021-11-01 4 MASS 908 Devices Inc.
Common Stock, par value $0.001
S - Sale X -8,328 716,838 -1.15 35.27 -293,729 25,282,876
2021-11-02 2021-11-01 4 MASS 908 Devices Inc.
Common Stock, par value $0.001
S - Sale X -7,775 725,166 -1.06 34.38 -267,304 24,931,207
2021-11-02 2021-11-01 4 MASS 908 Devices Inc.
Common Stock, par value $0.001
S - Sale X -3,897 732,941 -0.53 33.71 -131,368 24,707,441
2021-10-05 2021-10-01 4 MASS 908 Devices Inc.
Common Stock, par value $0.001
S - Sale X -5,472 736,838 -0.74 34.93 -191,137 25,737,751
2021-10-05 2021-10-01 4 MASS 908 Devices Inc.
Common Stock, par value $0.001
S - Sale X -4,829 742,310 -0.65 33.73 -162,882 25,038,116
2021-10-05 2021-10-01 4 MASS 908 Devices Inc.
Common Stock, par value $0.001
S - Sale X -9,699 747,139 -1.28 32.89 -319,000 24,573,402
2021-09-03 2021-09-01 4 MASS 908 Devices Inc.
Common Stock, par value $0.001
S - Sale X -3,583 756,838 -0.47 36.37 -130,314 27,526,198
2021-09-03 2021-09-01 4 MASS 908 Devices Inc.
Common Stock, par value $0.001
S - Sale X -10,818 760,421 -1.40 36.02 -389,664 27,390,364
2021-09-03 2021-09-01 4 MASS 908 Devices Inc.
Common Stock, par value $0.001
S - Sale X -5,599 771,239 -0.72 35.40 -198,205 27,301,861
2021-08-18 2021-08-18 4 MASS 908 Devices Inc.
Common Stock, par value $0.001
S - Sale X -12,000 776,838 -1.52 30.44 -365,280 23,646,949
2021-08-18 2021-08-17 4 MASS 908 Devices Inc.
Common Stock, par value $0.001
S - Sale X -4,000 788,838 -0.50 30.01 -120,040 23,673,028
2021-08-18 2021-08-16 4 MASS 908 Devices Inc.
Common Stock, par value $0.001
S - Sale X -9,522 792,838 -1.19 30.22 -287,755 23,959,564
2021-08-18 2021-08-16 4 MASS 908 Devices Inc.
Common Stock, par value $0.001
S - Sale X -6,035 802,360 -0.75 30.76 -185,637 24,680,594
2021-08-18 2021-08-16 4 MASS 908 Devices Inc.
Common Stock, par value $0.001
S - Sale X -3,443 808,395 -0.42 31.22 -107,490 25,238,092
2021-04-30 3/A MASS 908 Devices Inc.
Common Stock, par value $0.001
758,667
2021-04-30 3/A MASS 908 Devices Inc.
Common Stock, par value $0.001
505,777
2021-04-30 2020-12-22 4/A MASS 908 Devices Inc.
Series D Preferred Stock
C - Conversion -1,758 0 -100.00
2021-04-30 2020-12-22 4/A MASS 908 Devices Inc.
Series D Preferred Stock
C - Conversion -2,638 0 -100.00
2021-04-30 2020-12-22 4/A MASS 908 Devices Inc.
Series B Preferred Stock
C - Conversion -8,459 0 -100.00
2021-04-30 2020-12-22 4/A MASS 908 Devices Inc.
Series B Preferred Stock
C - Conversion -12,688 0 -100.00
2021-04-30 2020-12-22 4/A MASS 908 Devices Inc.
Series A Preferred Stock
C - Conversion -25,229 0 -100.00
2021-04-30 2020-12-22 4/A MASS 908 Devices Inc.
Series A Preferred Stock
C - Conversion -37,845 0 -100.00
2021-04-30 2020-12-22 4/A MASS 908 Devices Inc.
Common Stock, par value $0.001
C - Conversion 35,446 541,223 7.01
2021-04-30 2020-12-22 4/A MASS 908 Devices Inc.
Common Stock, par value $0.001
C - Conversion 53,171 811,838 7.01
2020-12-22 2020-12-22 4 MASS 908 Devices Inc.
Series D Preferred Stock
C - Conversion -4,396 0 -100.00
2020-12-22 2020-12-22 4 MASS 908 Devices Inc.
Series B Preferred Stock
C - Conversion -21,147 0 -100.00
2020-12-22 2020-12-22 4 MASS 908 Devices Inc.
Series A Preferred Stock
C - Conversion -63,074 0 -100.00
2020-12-22 2020-12-22 4 MASS 908 Devices Inc.
Common Stock, par value $0.001
C - Conversion 88,617 1,353,061 7.01
2020-12-17 3 MASS 908 Devices Inc.
Common Stock, par value $0.001
1,264,444
P
Open market or private purchase of non-derivative or derivative security
S
Open market or private sale of non-derivative or derivative security
A
Grant, award, or other acquisition of securities from the company (such as an option)
C
Conversion of derivative
D
Sale or transfer of securities back to the company
F
Payment of exercise price or tax liability using portion of securities received from the company
G
Gift of securities by or to the insider
K
Equity swaps and similar hedging transactions
M
Exercise or conversion of derivative security received from the company (such as an option)
V
A transaction voluntarily reported on Form 4
J
Other (accompanied by a footnote describing the transaction)