- Corporate Officers - S
- Seifert Thomas J
Insider Trading History of Seifert Thomas J
The following table details the insider trading activities
(stock purchases, stock sales, and stock option exercises) of Seifert Thomas J since 2016.
This trader's CIK number is 1473289.
At the time of last reporting, Seifert Thomas J was the Chief Financial Officer of Cloudflare, Inc.. (stock ticker symbol NET).
Also see all insider trading activities at Cloudflare, Inc..
Note that in the past
SEIFERT THOMAS J also reported insider trading activities as an insider of the following companies:
Yearly summary of insider trading at Cloudflare, Inc. (NET) by Seifert Thomas J
| | Insider Buying | Insider Sales | Option Exercises |
|---|
| Year | Symbol | Shares | Value | Shares | Value | Shares | Value |
|---|
| 2025 | NET | 0 | $0 | 376,746 | $60,330,853 | 0 | $0 |
| 2024 | NET | 0 | $0 | 543,806 | $48,291,930 | 0 | $0 |
| 2023 | NET | 0 | $0 | 505,911 | $31,657,484 | 0 | $0 |
| 2021 | NET | 0 | $0 | 570,000 | $62,669,598 | 0 | $0 |
| 2020 | NET | 0 | $0 | 300,000 | $11,094,600 | 0 | $0 |
| 2002 | NET | 0 | $0 | 170,000 | $12,933,850 | 0 | $0 |
Yearly summary of insider trading at Ipg Photonics Corp (IPGP) by Seifert Thomas J
| | Insider Buying | Insider Sales | Option Exercises |
|---|
| Year | Symbol | Shares | Value | Shares | Value | Shares | Value |
|---|
| 2020 | IPGP | 0 | $0 | 11,370 | $2,423,708 | 6,564 | $727,507 |
| 2017 | IPGP | 0 | $0 | 6,799 | $955,534 | 12,324 | $970,730 |
| 2016 | IPGP | 0 | $0 | 990 | $99,019 | 0 | $0 |
Insider trading activities at 2 companies by Seifert Thomas J:
1. Cloudflare, Inc. (NET)
2. Ipg Photonics Corp (IPGP)
Table 1. Insider trading of Cloudflare, Inc. (NET) by Seifert Thomas J
| Trade Date | Symbol | Trade Type | Shares | Price ($) | Value ($) |
|---|
| 2025-08-20 | NET | Sale | 41,555 | 190.12 | 7,900,519 |
| 2025-07-25 | NET | Sale | 1,600 | 200.00 | 320,000 |
| 2025-07-28 | NET | Sale | 59,130 | 200.37 | 11,847,818 |
| 2025-07-21 | NET | Sale | 44,270 | 199.25 | 8,820,620 |
| 2025-06-20 | NET | Sale | 10,000 | 182.09 | 1,820,860 |
| 2025-05-20 | NET | Sale | 41,556 | 156.89 | 6,519,720 |
| 2025-04-25 | NET | Sale | 10,000 | 120.14 | 1,201,350 |
| 2025-04-25 | NET | Sale | 10,000 | 120.14 | 1,201,350 |
| 2025-04-25 | NET | Sale | 10,000 | 120.14 | 1,201,350 |
| 2025-03-20 | NET | Sale | 10,000 | 120.00 | 1,200,000 |
| 2025-03-05 | NET | Sale | 15,000 | 141.07 | 2,116,110 |
| 2025-02-19 | NET | Sale | 28,635 | 163.55 | 4,683,368 |
| 2025-02-03 | NET | Sale | 15,000 | 135.29 | 2,029,395 |
| 2025-01-17 | NET | Sale | 33,864 | 118.79 | 4,022,772 |
| 2025-01-21 | NET | Sale | 31,136 | 120.10 | 3,739,371 |
| 2025-01-03 | NET | Sale | 15,000 | 113.75 | 1,706,250 |
| 2024-12-18 | NET | Sale | 15,000 | 113.38 | 1,700,715 |
| 2024-11-19 | NET | Sale | 28,635 | 94.18 | 2,696,901 |
| 2024-11-04 | NET | Sale | 15,000 | 86.83 | 1,302,450 |
| 2024-10-18 | NET | Sale | 15,000 | 91.04 | 1,365,600 |
| 2024-10-03 | NET | Sale | 15,000 | 79.12 | 1,186,770 |
| 2024-09-18 | NET | Sale | 15,000 | 78.67 | 1,180,065 |
| 2024-09-04 | NET | Sale | 15,000 | 78.20 | 1,173,000 |
| 2024-08-20 | NET | Sale | 28,636 | 83.61 | 2,394,255 |
| 2024-08-02 | NET | Sale | 15,000 | 78.14 | 1,172,115 |
| 2024-07-18 | NET | Sale | 15,000 | 79.69 | 1,195,305 |
| 2024-07-03 | NET | Sale | 15,000 | 85.26 | 1,278,855 |
| 2024-06-20 | NET | Sale | 15,000 | 78.96 | 1,184,445 |
| 2024-06-05 | NET | Sale | 15,000 | 69.10 | 1,036,499 |
| 2024-05-20 | NET | Sale | 28,634 | 75.17 | 2,152,417 |
| 2024-05-03 | NET | Sale | 15,000 | 75.28 | 1,129,245 |
| 2024-04-18 | NET | Sale | 15,000 | 87.50 | 1,312,485 |
| 2024-04-03 | NET | Sale | 15,000 | 94.96 | 1,424,445 |
| 2024-03-15 | NET | Sale | 110,000 | 92.24 | 10,146,070 |
| 2024-03-04 | NET | Sale | 15,000 | 99.55 | 1,493,295 |
| 2024-02-20 | NET | Sale | 27,901 | 96.19 | 2,683,908 |
| 2024-02-09 | NET | Sale | 50,000 | 110.76 | 5,537,900 |
| 2024-02-02 | NET | Sale | 15,000 | 81.03 | 1,215,450 |
| 2024-01-18 | NET | Sale | 15,000 | 78.13 | 1,172,010 |
| 2024-01-03 | NET | Sale | 15,000 | 77.18 | 1,157,730 |
| 2023-12-18 | NET | Sale | 15,000 | 84.97 | 1,274,610 |
| 2023-12-13 | NET | Sale | 34,329 | 80.21 | 2,753,563 |
| 2023-12-06 | NET | Sale | 400 | 80.00 | 32,000 |
| 2023-12-04 | NET | Sale | 30,271 | 79.36 | 2,402,397 |
| 2023-11-17 | NET | Sale | 16,901 | 71.57 | 1,209,536 |
| 2023-11-03 | NET | Sale | 15,000 | 61.49 | 922,290 |
| 2023-10-18 | NET | Sale | 15,000 | 63.56 | 953,340 |
| 2023-10-03 | NET | Sale | 15,000 | 59.86 | 897,945 |
| 2023-09-18 | NET | Sale | 15,000 | 61.92 | 928,815 |
| 2023-09-05 | NET | Sale | 15,000 | 64.42 | 966,240 |
| 2023-08-18 | NET | Sale | 16,901 | 58.10 | 981,948 |
| 2023-08-03 | NET | Sale | 15,000 | 64.67 | 969,975 |
| 2023-07-18 | NET | Sale | 15,000 | 72.24 | 1,083,660 |
| 2023-07-03 | NET | Sale | 15,000 | 65.72 | 985,770 |
| 2023-06-20 | NET | Sale | 15,000 | 67.48 | 1,012,275 |
| 2023-06-05 | NET | Sale | 15,000 | 68.73 | 1,031,009 |
| 2023-05-18 | NET | Sale | 16,900 | 56.72 | 958,534 |
| 2023-05-03 | NET | Sale | 15,000 | 42.58 | 638,760 |
| 2023-04-18 | NET | Sale | 15,000 | 65.13 | 976,965 |
| 2023-03-30 | NET | Sale | 5,218 | 60.02 | 313,210 |
| 2023-03-31 | NET | Sale | 44,782 | 60.11 | 2,691,980 |
| 2023-04-03 | NET | Sale | 15,000 | 60.69 | 910,410 |
| 2023-03-20 | NET | Sale | 15,000 | 53.49 | 802,425 |
| 2023-02-17 | NET | Sale | 15,209 | 65.56 | 997,147 |
| 2023-02-13 | NET | Sale | 20,000 | 61.78 | 1,235,540 |
| 2023-01-30 | NET | Sale | 20,000 | 51.23 | 1,024,520 |
| 2023-01-17 | NET | Sale | 20,000 | 44.27 | 885,380 |
| 2023-01-03 | NET | Sale | 20,000 | 45.24 | 904,840 |
| 2022-12-19 | NET | Sale | 20,000 | 45.62 | 912,400 |
| 2002-11-11 | NET | Sale | 50,000 | 50.15 | 2,507,500 |
| 2022-11-07 | NET | Sale | 20,000 | 41.10 | 822,020 |
| 2022-11-07 | NET | Sale | 20,000 | 41.10 | 822,020 |
| 2022-04-12 | NET | Sale | 10,000 | 116.34 | 1,163,410 |
| 2022-03-29 | NET | Sale | 10,000 | 128.63 | 1,286,270 |
| 2022-03-17 | NET | Sale | 10,000 | 100.00 | 1,000,000 |
| 2022-02-17 | NET | Sale | 10,000 | 106.85 | 1,068,530 |
| 2022-01-18 | NET | Sale | 20,000 | 96.90 | 1,938,060 |
| 2022-01-04 | NET | Sale | 20,000 | 116.30 | 2,326,040 |
| 2021-12-21 | NET | Sale | 20,000 | 138.42 | 2,768,460 |
| 2021-12-07 | NET | Sale | 20,000 | 157.95 | 3,159,020 |
| 2021-11-23 | NET | Sale | 20,000 | 184.34 | 3,686,840 |
| 2021-11-09 | NET | Sale | 20,000 | 205.32 | 4,106,400 |
| 2021-10-26 | NET | Sale | 20,000 | 186.82 | 3,736,340 |
| 2021-10-12 | NET | Sale | 20,000 | 148.29 | 2,965,880 |
| 2021-09-28 | NET | Sale | 20,000 | 115.85 | 2,316,980 |
| 2021-09-14 | NET | Sale | 20,000 | 127.39 | 2,547,760 |
| 2021-08-31 | NET | Sale | 20,000 | 122.05 | 2,441,060 |
| 2021-08-17 | NET | Sale | 20,000 | 119.56 | 2,391,240 |
| 2021-08-03 | NET | Sale | 20,000 | 118.91 | 2,378,120 |
| 2021-07-20 | NET | Sale | 20,000 | 105.97 | 2,119,340 |
| 2021-07-06 | NET | Sale | 20,000 | 107.72 | 2,154,400 |
| 2021-06-22 | NET | Sale | 20,000 | 102.31 | 2,046,180 |
| 2021-06-14 | NET | Sale | 50,000 | 95.19 | 4,759,450 |
| 2021-05-25 | NET | Sale | 20,000 | 79.92 | 1,598,500 |
| 2021-05-11 | NET | Sale | 20,000 | 68.93 | 1,378,680 |
| 2021-04-27 | NET | Sale | 20,000 | 86.27 | 1,725,440 |
| 2021-03-30 | NET | Sale | 20,000 | 65.07 | 1,301,440 |
| 2021-03-16 | NET | Sale | 20,000 | 74.97 | 1,499,500 |
| 2021-03-02 | NET | Sale | 20,000 | 76.04 | 1,520,720 |
| 2021-02-19 | NET | Sale | 1,168 | 85.28 | 99,605 |
| 2021-02-16 | NET | Sale | 70,000 | 83.06 | 5,813,850 |
| 2021-02-17 | NET | Sale | 18,661 | 85.15 | 1,588,984 |
| 2021-02-18 | NET | Sale | 30,171 | 85.03 | 2,565,409 |
| 2020-10-27 | NET | Sale | 30,000 | 56.71 | 1,701,240 |
| 2020-10-13 | NET | Sale | 30,000 | 57.89 | 1,736,640 |
| 2020-09-29 | NET | Sale | 15,000 | 40.91 | 613,725 |
| 2020-09-15 | NET | Sale | 15,000 | 35.96 | 539,370 |
| 2020-09-01 | NET | Sale | 15,000 | 39.92 | 598,845 |
| 2020-08-18 | NET | Sale | 15,000 | 39.97 | 599,475 |
| 2020-08-04 | NET | Sale | 15,000 | 42.19 | 632,805 |
| 2020-07-21 | NET | Sale | 15,000 | 38.62 | 579,300 |
| 2020-07-07 | NET | Sale | 15,000 | 38.04 | 570,645 |
| 2020-06-23 | NET | Sale | 15,000 | 36.30 | 544,485 |
| 2020-06-09 | NET | Sale | 15,000 | 28.73 | 431,010 |
| 2020-05-26 | NET | Sale | 15,000 | 28.44 | 426,630 |
| 2020-05-12 | NET | Sale | 15,000 | 29.13 | 436,950 |
| 2020-04-28 | NET | Sale | 15,000 | 23.91 | 358,620 |
| 2020-04-14 | NET | Sale | 15,000 | 23.46 | 351,885 |
| 2020-03-31 | NET | Sale | 15,000 | 24.87 | 373,050 |
| 2020-03-17 | NET | Sale | 15,000 | 18.00 | 270,000 |
| 2020-03-03 | NET | Sale | 15,000 | 22.00 | 329,925 |
Table 2. Insider trading of Ipg Photonics Corp (IPGP) by Seifert Thomas J
| Trade Date | Symbol | Trade Type | Shares | Price ($) | Value ($) |
|---|
| 2020-12-07 | IPGP | Option Ex | 6,564 | 110.83 | 727,507 |
| 2020-12-07 | IPGP | Sale | 11,370 | 213.17 | 2,423,708 |
| 2017-06-05 | IPGP | Option Ex | 2,355 | 63.40 | 149,307 |
| 2017-06-05 | IPGP | Sale | 2,849 | 141.47 | 403,048 |
| 2017-06-01 | IPGP | Option Ex | 3,002 | 87.87 | 263,785 |
| 2017-06-01 | IPGP | Sale | 3,950 | 139.87 | 552,486 |
| 2017-01-30 | IPGP | Option Ex | 6,967 | 80.04 | 557,638 |
| 2016-12-15 | IPGP | Sale | 990 | 100.02 | 99,019 |
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 Seifert Thomas J
(Chief Financial Officer of Cloudflare, Inc. at the time of this reporting) see
the Securities and Exchange Commission (SEC) website.