- Corporate Officers - T
- Tompkins Mark N.
Insider Trading History of Tompkins Mark N.
The following table details the insider trading activities
(stock purchases, stock sales, and stock option exercises) of Tompkins Mark N. since 2017.
This trader's CIK number is 1455971.
At the time of last reporting, Tompkins Mark N. was the Officer of Surfside Acquisition Inc.. (stock ticker symbol NONE).
Also see all insider trading activities at Surfside Acquisition Inc..
Note that in the past
Tompkins Mark N. also reported insider trading activities as an insider of the following companies:
Yearly summary of insider trading at Surfside Acquisition Inc. (NONE) by Tompkins Mark N.
| | Insider Buying | Insider Sales | Option Exercises |
|---|
| Year | Symbol | Shares | Value | Shares | Value | Shares | Value |
|---|
| 2025 | NONE | 0 | $0 | 25,000 | $0 | 0 | $0 |
Yearly summary of insider trading at Amesite Inc. (AMST) by Tompkins Mark N.
| | Insider Buying | Insider Sales | Option Exercises |
|---|
| Year | Symbol | Shares | Value | Shares | Value | Shares | Value |
|---|
| 2021 | AMST | 0 | $0 | 788,121 | $2,400,670 | 0 | $0 |
| 2020 | AMST | 20,000 | $100,000 | 0 | $0 | 0 | $0 |
Yearly summary of insider trading at Akoustis Technologies, Inc. (AKTS) by Tompkins Mark N.
| | Insider Buying | Insider Sales | Option Exercises |
|---|
| Year | Symbol | Shares | Value | Shares | Value | Shares | Value |
|---|
| 2017 | AKTS | 0 | $0 | 211,546 | $1,434,978 | 0 | $0 |
Yearly summary of insider trading at Amesite Inc. (AMST) by Tompkins Mark N.
| | Insider Buying | Insider Sales | Option Exercises |
|---|
| Year | Symbol | Shares | Value | Shares | Value | Shares | Value |
|---|
| 2020 | AMST | 20,000 | $100,000 | 0 | $0 | 0 | $0 |
| 2018 | AMST | 0 | $0 | 50,000 | $4,000 | 0 | $0 |
Yearly summary of insider trading at Guerrilla Rf, Inc. (N/A) by Tompkins Mark N.
| | Insider Buying | Insider Sales | Option Exercises |
|---|
| Year | Symbol | Shares | Value | Shares | Value | Shares | Value |
|---|
| 2021 | N/A | 250,000 | $500,000 | 0 | $0 | 0 | $0 |
Yearly summary of insider trading at Transphorm, Inc. (NONE) by Tompkins Mark N.
| | Insider Buying | Insider Sales | Option Exercises |
|---|
| Year | Symbol | Shares | Value | Shares | Value | Shares | Value |
|---|
| 2020 | NONE | 25,000 | $100,000 | 0 | $0 | 0 | $0 |
Yearly summary of insider trading at Orielle Acquisition Corp. (NONE) by Tompkins Mark N.
| | Insider Buying | Insider Sales | Option Exercises |
|---|
| Year | Symbol | Shares | Value | Shares | Value | Shares | Value |
|---|
| 2025 | NONE | 0 | $0 | 50,000 | $0 | 0 | $0 |
Yearly summary of insider trading at Exicure, Inc. (NONE) by Tompkins Mark N.
| | Insider Buying | Insider Sales | Option Exercises |
|---|
| Year | Symbol | Shares | Value | Shares | Value | Shares | Value |
|---|
| 2017 | NONE | 201,667 | $500,876 | 0 | $0 | 0 | $0 |
Yearly summary of insider trading at Aspen-1 Acquisition Inc. (NONE) by Tompkins Mark N.
| | Insider Buying | Insider Sales | Option Exercises |
|---|
| Year | Symbol | Shares | Value | Shares | Value | Shares | Value |
|---|
| 2025 | NONE | 0 | $0 | 25,000 | $0 | 0 | $0 |
Insider trading activities at 9 companies by Tompkins Mark N.:
1. Surfside Acquisition Inc. (NONE)
2. Amesite Inc. (AMST)
3. Akoustis Technologies, Inc. (AKTS)
4. Amesite Inc. (AMST)
5. Guerrilla Rf, Inc. (N/A)
6. Transphorm, Inc. (NONE)
7. Orielle Acquisition Corp. (NONE)
8. Exicure, Inc. (NONE)
9. Aspen-1 Acquisition Inc. (NONE)
Table 1. Insider trading of Surfside Acquisition Inc. (NONE) by Tompkins Mark N.
| Trade Date | Symbol | Trade Type | Shares | Price ($) | Value ($) |
|---|
| 2025-08-26 | NONE | Sale | 25,000 | .00 | 0 |
Table 2. Insider trading of Amesite Inc. (AMST) by Tompkins Mark N.
| Trade Date | Symbol | Trade Type | Shares | Price ($) | Value ($) |
|---|
| 2021-05-25 | AMST | Sale | 11,453 | 2.24 | 25,620 |
| 2021-05-26 | AMST | Sale | 22,444 | 2.27 | 51,037 |
| 2021-05-27 | AMST | Sale | 13,600 | 2.38 | 32,435 |
| 2021-05-24 | AMST | Sale | 10,243 | 2.25 | 23,046 |
| 2021-05-21 | AMST | Sale | 3,191 | 2.20 | 7,023 |
| 2021-05-20 | AMST | Sale | 56,437 | 2.21 | 124,725 |
| 2021-05-17 | AMST | Sale | 7,395 | 2.22 | 16,431 |
| 2021-05-18 | AMST | Sale | 16,430 | 2.19 | 35,998 |
| 2021-05-19 | AMST | Sale | 44,400 | 2.23 | 98,967 |
| 2021-05-14 | AMST | Sale | 40,109 | 2.35 | 94,456 |
| 2021-05-13 | AMST | Sale | 53,610 | 2.30 | 123,410 |
| 2021-05-12 | AMST | Sale | 13,705 | 2.22 | 30,383 |
| 2021-05-07 | AMST | Sale | 12,711 | 2.69 | 34,218 |
| 2021-05-10 | AMST | Sale | 12,600 | 2.50 | 31,525 |
| 2021-05-11 | AMST | Sale | 11,311 | 2.31 | 26,094 |
| 2021-05-05 | AMST | Sale | 10,385 | 2.61 | 27,063 |
| 2021-05-06 | AMST | Sale | 13,777 | 2.67 | 36,715 |
| 2021-05-04 | AMST | Sale | 51,971 | 2.96 | 154,042 |
| 2021-05-03 | AMST | Sale | 16,234 | 2.90 | 47,127 |
| 2021-04-30 | AMST | Sale | 28,655 | 2.72 | 78,056 |
| 2021-04-29 | AMST | Sale | 16,169 | 2.61 | 42,265 |
| 2021-04-26 | AMST | Sale | 13,500 | 2.97 | 40,081 |
| 2021-04-27 | AMST | Sale | 11,519 | 2.95 | 34,015 |
| 2021-04-28 | AMST | Sale | 3,400 | 2.86 | 9,737 |
| 2021-04-12 | AMST | Sale | 15,539 | 3.43 | 53,314 |
| 2021-04-13 | AMST | Sale | 26,494 | 3.26 | 86,370 |
| 2021-04-14 | AMST | Sale | 12,050 | 3.25 | 39,174 |
| 2021-04-08 | AMST | Sale | 43,450 | 3.58 | 155,464 |
| 2021-04-09 | AMST | Sale | 11,000 | 3.52 | 38,720 |
| 2021-04-05 | AMST | Sale | 9,924 | 4.21 | 41,770 |
| 2021-04-06 | AMST | Sale | 67,904 | 4.19 | 284,517 |
| 2021-04-01 | AMST | Sale | 29,427 | 4.12 | 121,298 |
| 2021-03-30 | AMST | Sale | 45,834 | 4.26 | 195,252 |
| 2021-03-31 | AMST | Sale | 11,250 | 4.25 | 47,868 |
| 2021-03-05 | AMST | Sale | 3,449 | 6.02 | 20,762 |
| 2021-03-04 | AMST | Sale | 16,551 | 5.54 | 91,692 |
| 2020-09-29 | AMST | Buy | 20,000 | 5.00 | 100,000 |
Table 3. Insider trading of Akoustis Technologies, Inc. (AKTS) by Tompkins Mark N.
| Trade Date | Symbol | Trade Type | Shares | Price ($) | Value ($) |
|---|
| 2017-12-27 | AKTS | Sale | 15,581 | 6.05 | 94,218 |
| 2017-12-28 | AKTS | Sale | 15,000 | 6.24 | 93,600 |
| 2017-12-22 | AKTS | Sale | 12,500 | 6.28 | 78,500 |
| 2017-12-21 | AKTS | Sale | 10,000 | 6.27 | 62,699 |
| 2017-12-19 | AKTS | Sale | 14,513 | 6.43 | 93,275 |
| 2017-12-20 | AKTS | Sale | 10,000 | 6.00 | 59,980 |
| 2017-09-28 | AKTS | Sale | 22,955 | 6.83 | 156,897 |
| 2017-09-20 | AKTS | Sale | 17,142 | 7.65 | 131,204 |
| 2017-09-21 | AKTS | Sale | 8,149 | 7.14 | 58,183 |
| 2017-09-12 | AKTS | Sale | 11,676 | 6.59 | 76,968 |
| 2017-09-11 | AKTS | Sale | 38,230 | 6.89 | 263,442 |
| 2017-09-08 | AKTS | Sale | 10,000 | 6.54 | 65,400 |
| 2017-09-06 | AKTS | Sale | 800 | 7.89 | 6,312 |
| 2017-09-07 | AKTS | Sale | 15,000 | 7.22 | 108,300 |
| 2017-07-10 | AKTS | Sale | 10,000 | 8.60 | 86,000 |
Table 4. Insider trading of Amesite Inc. (AMST) by Tompkins Mark N.
| Trade Date | Symbol | Trade Type | Shares | Price ($) | Value ($) |
|---|
| 2020-09-29 | AMST | Buy | 20,000 | 5.00 | 100,000 |
| 2018-09-06 | NONE | Sale | 50,000 | .08 | 4,000 |
Table 5. Insider trading of Guerrilla Rf, Inc. (N/A) by Tompkins Mark N.
| Trade Date | Symbol | Trade Type | Shares | Price ($) | Value ($) |
|---|
| 2021-11-12 | N/A | Buy | 250,000 | 2.00 | 500,000 |
Table 6. Insider trading of Transphorm, Inc. (NONE) by Tompkins Mark N.
| Trade Date | Symbol | Trade Type | Shares | Price ($) | Value ($) |
|---|
| 2020-02-12 | NONE | Buy | 25,000 | 4.00 | 100,000 |
Table 7. Insider trading of Orielle Acquisition Corp. (NONE) by Tompkins Mark N.
| Trade Date | Symbol | Trade Type | Shares | Price ($) | Value ($) |
|---|
| 2025-08-26 | NONE | Sale | 50,000 | .00 | 0 |
Table 8. Insider trading of Exicure, Inc. (NONE) by Tompkins Mark N.
| Trade Date | Symbol | Trade Type | Shares | Price ($) | Value ($) |
|---|
| 2017-09-26 | NONE | Buy | 166,667 | 3.00 | 500,001 |
| 2017-06-15 | NONE | Buy | 35,000 | .03 | 875 |
Table 9. Insider trading of Aspen-1 Acquisition Inc. (NONE) by Tompkins Mark N.
| Trade Date | Symbol | Trade Type | Shares | Price ($) | Value ($) |
|---|
| 2025-07-16 | NONE | Sale | 25,000 | .00 | 0 |
Insider trading activities including stock purchases, stock sales, and option exercises
listed in the above table cannot be completely guaranteed as to their accuracy.
For more information regarding the trades made by Tompkins Mark N.
(Officer of Surfside Acquisition Inc. at the time of this reporting) see
the Securities and Exchange Commission (SEC) website.