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Insiders · Profile

SEIFERT THOMAS J

Chief Financial Officer at Cloudflare · Director at IPG PHOTONICS. Filing since 11 Nov 2002. CIK 0001473289

NET Cloudflare, Inc. Chief Financial Officer · 141 trades IPGP IPG PHOTONICS CORP Director · 4 trades
Company
Date
Role
Action
Shares
Amount
Of holding
NET Cloudflare, Inc.
17 Sep 2026
Chief Financial Officer
Sold on a plan
10,000
$3.32M
8.5%
NET Cloudflare, Inc.
17 Aug 2026
Chief Financial Officer
Sold on a plan
10,000
$3.07M
8.3%
NET Cloudflare, Inc.
4 Aug 2026
Chief Financial Officer
Sold on a plan
55,000
$16.52M
32.6%
NET Cloudflare, Inc.
17 Jul 2026
Chief Financial Officer
Sold on a plan
10,000
$2.77M
8.1%
NET Cloudflare, Inc.
17 Jun 2026
Chief Financial Officer
Sold on a plan
10,000
$2.32M
7.9%
NET Cloudflare, Inc.
18 May 2026
Chief Financial Officer
Sold on a plan
10,000
$2.01M
4.5%
NET Cloudflare, Inc.
17 Apr 2026
Chief Financial Officer
Sold on a plan
10,000
$1.98M
4.3%
NET Cloudflare, Inc.
17 Mar 2026
Chief Financial Officer
Sold on a plan
10,341
$2.20M
4.4%
NET Cloudflare, Inc.
20 Feb 2026
Chief Financial Officer
Sold on a plan
41,557
$7.69M
32.7%
NET Cloudflare, Inc.
20 Jan 2026
Chief Financial Officer
Sold on a plan
10,000
$1.78M
6.8%
NET Cloudflare, Inc.
22 Dec 2025
Chief Financial Officer
Sold on a plan
10,000
$2.02M
6.8%
NET Cloudflare, Inc.
20 Nov 2025
Chief Financial Officer
Sold on a plan
41,555
$8.07M
23.2%
NET Cloudflare, Inc.
20 Oct 2025
Chief Financial Officer
Sold on a plan
10,000
$2.12M
5.0%
NET Cloudflare, Inc.
22 Sep 2025
Chief Financial Officer
Sold on a plan
10,000
$2.28M
5.0%
NET Cloudflare, Inc.
20 Aug 2025
Chief Financial Officer
Sold on a plan
41,555
$7.92M
18.0%
NET Cloudflare, Inc.
28 Jul 2025
Chief Financial Officer
Sold on a plan
59,130
$11.84M
100%
NET Cloudflare, Inc.
25 Jul 2025
Chief Financial Officer
Sold on a plan
1,600
$320.00K
100%
NET Cloudflare, Inc.
21 Jul 2025
Chief Financial Officer
Sold on a plan
34,270
$6.86M
100%
NET Cloudflare, Inc.
21 Jul 2025
Chief Financial Officer
Sold on a plan
10,000
$1.98M
4.0%
NET Cloudflare, Inc.
20 Jun 2025
Chief Financial Officer
Sold on a plan
10,000
$1.81M
4.0%
NET Cloudflare, Inc.
20 May 2025
Chief Financial Officer
Sold on a plan
41,556
$6.52M
14.7%
NET Cloudflare, Inc.
25 Apr 2025
Chief Financial Officer
Sold on a plan
10,000
$1.20M
3.3%
NET Cloudflare, Inc.
20 Mar 2025
CHIEF FINANCIAL OFFICER
Sold on a plan
10,000
$1.20M
3.3%
NET Cloudflare, Inc.
5 Mar 2025
Chief Financial Officer
Sold on a plan
15,000
$2.13M
4.9%
NET Cloudflare, Inc.
19 Feb 2025
Chief Financial Officer
Sold on a plan
28,635
$4.64M
8.9%
NET Cloudflare, Inc.
3 Feb 2025
Chief Financial Officer
Sold on a plan
15,000
$2.05M
5.6%
NET Cloudflare, Inc.
21 Jan 2025
Chief Financial Officer
Sold on a plan
31,136
$3.74M
11.0%
NET Cloudflare, Inc.
17 Jan 2025
Chief Financial Officer
Sold on a plan
33,864
$4.04M
11.8%
NET Cloudflare, Inc.
3 Jan 2025
Chief Financial Officer
Sold on a plan
15,000
$1.71M
5.6%
NET Cloudflare, Inc.
18 Dec 2024
Chief Financial Officer
Sold on a plan
15,000
$1.69M
5.6%
NET Cloudflare, Inc.
4 Dec 2024
Chief Financial Officer
Sold on a plan
15,000
$1.65M
5.6%
NET Cloudflare, Inc.
19 Nov 2024
CHIEF FINANCIAL OFFICER
Sold on a plan
28,635
$2.72M
10.2%
NET Cloudflare, Inc.
4 Nov 2024
Chief Financial Officer
Sold on a plan
15,000
$1.30M
5.1%
NET Cloudflare, Inc.
18 Oct 2024
Chief Financial Officer
Sold on a plan
15,000
$1.36M
5.1%
NET Cloudflare, Inc.
3 Oct 2024
CHIEF FINANCIAL OFFICER
Sold on a plan
15,000
$1.19M
5.1%
NET Cloudflare, Inc.
18 Sep 2024
CHIEF FINANCIAL OFFICER
Sold on a plan
15,000
$1.18M
5.1%
NET Cloudflare, Inc.
4 Sep 2024
CHIEF FINANCIAL OFFICER
Sold on a plan
15,000
$1.17M
5.1%
NET Cloudflare, Inc.
20 Aug 2024
CHIEF FINANCIAL OFFICER
Sold on a plan
28,636
$2.37M
9.2%
NET Cloudflare, Inc.
2 Aug 2024
CHIEF FINANCIAL OFFICER
Sold on a plan
15,000
$1.18M
4.6%
NET Cloudflare, Inc.
18 Jul 2024
CHIEF FINANCIAL OFFICER
Sold on a plan
15,000
$1.18M
4.6%
NET Cloudflare, Inc.
3 Jul 2024
CHIEF FINANCIAL OFFICER
Sold on a plan
15,000
$1.27M
4.6%
NET Cloudflare, Inc.
20 Jun 2024
CHIEF FINANCIAL OFFICER
Sold on a plan
15,000
$1.18M
4.6%
NET Cloudflare, Inc.
5 Jun 2024
CHIEF FINANCIAL OFFICER
Sold on a plan
15,000
$1.04M
4.6%
NET Cloudflare, Inc.
20 May 2024
CHIEF FINANCIAL OFFICER
Sold on a plan
28,634
$2.15M
8.5%
NET Cloudflare, Inc.
3 May 2024
CHIEF FINANCIAL OFFICER
Sold on a plan
15,000
$1.11M
4.2%
NET Cloudflare, Inc.
18 Apr 2024
CHIEF FINANCIAL OFFICER
Sold on a plan
15,000
$1.31M
4.2%
NET Cloudflare, Inc.
3 Apr 2024
CHIEF FINANCIAL OFFICER
Sold on a plan
15,000
$1.42M
4.2%
NET Cloudflare, Inc.
15 Mar 2024
Chief Financial Officer
Sold on a plan
95,000
$8.72M
100%
NET Cloudflare, Inc.
15 Mar 2024
Chief Financial Officer
Sold on a plan
15,000
$1.38M
4.2%
NET Cloudflare, Inc.
4 Mar 2024
CHIEF FINANCIAL OFFICER
Sold on a plan
15,000
$1.50M
4.2%
NET Cloudflare, Inc.
20 Feb 2024
CHIEF FINANCIAL OFFICER
Sold on a plan
27,901
$2.69M
7.6%
NET Cloudflare, Inc.
9 Feb 2024
Chief Financial Officer
Sold on a plan
50,000
$5.51M
12.0%
NET Cloudflare, Inc.
2 Feb 2024
Chief Financial Officer
Sold on a plan
15,000
$1.23M
3.9%
NET Cloudflare, Inc.
18 Jan 2024
Chief Financial Officer
Sold on a plan
15,000
$1.17M
5.8%
NET Cloudflare, Inc.
3 Jan 2024
Chief Financial Officer
Sold on a plan
15,000
$1.15M
5.8%
NET Cloudflare, Inc.
18 Dec 2023
Chief Financial Officer
Sold on a plan
15,000
$1.27M
5.8%
NET Cloudflare, Inc.
13 Dec 2023
Chief Financial Officer
Sold on a plan
34,329
$2.75M
12.4%
NET Cloudflare, Inc.
6 Dec 2023
Chief Financial Officer
Sold on a plan
400
$32.00K
0.2%
NET Cloudflare, Inc.
4 Dec 2023
Chief Financial Officer
Sold on a plan
30,271
$2.41M
11.1%
NET Cloudflare, Inc.
17 Nov 2023
Chief Financial Officer
Sold on a plan
16,901
$1.22M
6.5%
NET Cloudflare, Inc.
3 Nov 2023
Chief Financial Officer
Sold on a plan
15,000
$947.64K
5.6%
NET Cloudflare, Inc.
18 Oct 2023
Chief Financial Officer
Sold on a plan
15,000
$945.43K
5.6%
NET Cloudflare, Inc.
3 Oct 2023
Chief Financial Officer
Sold on a plan
15,000
$888.42K
5.6%
NET Cloudflare, Inc.
18 Sep 2023
Chief Financial Officer
Sold on a plan
15,000
$926.18K
5.6%
NET Cloudflare, Inc.
5 Sep 2023
Chief Financial Officer
Sold on a plan
15,000
$967.88K
5.6%
NET Cloudflare, Inc.
18 Aug 2023
Chief Financial Officer
Sold on a plan
16,901
$985.79K
6.3%
NET Cloudflare, Inc.
3 Aug 2023
Chief Financial Officer
Sold on a plan
15,000
$972.91K
5.4%
NET Cloudflare, Inc.
18 Jul 2023
Chief Financial Officer
Sold on a plan
15,000
$1.08M
5.4%
NET Cloudflare, Inc.
3 Jul 2023
Chief Financial Officer
Sold on a plan
15,000
$983.94K
5.4%
NET Cloudflare, Inc.
20 Jun 2023
Chief Financial Officer
Sold on a plan
15,000
$1.01M
5.4%
NET Cloudflare, Inc.
5 Jun 2023
Chief Financial Officer
Sold on a plan
15,000
$1.03M
5.4%
NET Cloudflare, Inc.
18 May 2023
Chief Financial Officer
Sold on a plan
16,900
$969.21K
6.0%
NET Cloudflare, Inc.
3 May 2023
Chief Financial Officer
Sold on a plan
15,000
$634.93K
5.3%
NET Cloudflare, Inc.
18 Apr 2023
Chief Financial Officer
Sold on a plan
15,000
$967.35K
19.6%
NET Cloudflare, Inc.
3 Apr 2023
Chief Financial Officer
Sold on a plan
15,000
$911.79K
19.6%
NET Cloudflare, Inc.
31 Mar 2023
Chief Financial Officer
Sold on a plan
44,782
$2.69M
42.2%
NET Cloudflare, Inc.
30 Mar 2023
Chief Financial Officer
Sold on a plan
5,218
$313.21K
7.8%
NET Cloudflare, Inc.
20 Mar 2023
Chief Financial Officer
Sold on a plan
15,000
$803.48K
19.6%
NET Cloudflare, Inc.
27 Feb 2023
Chief Financial Officer
Sold, plan not stated
20,000
$1.21M
24.6%
NET Cloudflare, Inc.
17 Feb 2023
Chief Financial Officer
Sold, plan not stated
15,209
$983.20K
19.9%
NET Cloudflare, Inc.
13 Feb 2023
Chief Financial Officer
Sold, plan not stated
20,000
$1.25M
18.8%
NET Cloudflare, Inc.
30 Jan 2023
Chief Financial Officer
Sold, plan not stated
20,000
$1.02M
18.8%
NET Cloudflare, Inc.
17 Jan 2023
Chief Financial Officer
Sold, plan not stated
20,000
$901.44K
18.8%
NET Cloudflare, Inc.
3 Jan 2023
Chief Financial Officer
Sold, plan not stated
20,000
$873.98K
18.8%
NET Cloudflare, Inc.
19 Dec 2022
Chief Financial Officer
Sold, plan not stated
20,000
$907.12K
18.8%
NET Cloudflare, Inc.
5 Dec 2022
Chief Financial Officer
Sold, plan not stated
20,000
$890.50K
18.8%
NET Cloudflare, Inc.
21 Nov 2022
Chief Financial Officer
Sold, plan not stated
20,000
$912.33K
18.8%
NET Cloudflare, Inc.
7 Nov 2022
Chief Financial Officer
Sold, plan not stated
20,000
$815.57K
18.8%
NET Cloudflare, Inc.
12 Apr 2022
Chief Financial Officer
Sold, plan not stated
10,000
$1.15M
10.4%
NET Cloudflare, Inc.
29 Mar 2022
Chief Financial Officer
Sold, plan not stated
10,000
$1.29M
10.4%
NET Cloudflare, Inc.
17 Mar 2022
Chief Financial Officer
Sold, plan not stated
10,000
$1.00M
10.4%
NET Cloudflare, Inc.
17 Feb 2022
Chief Financial Officer
Sold, plan not stated
10,000
$1.06M
10.4%
NET Cloudflare, Inc.
18 Jan 2022
Chief Financial Officer
Sold, plan not stated
20,000
$1.91M
28.5%
NET Cloudflare, Inc.
4 Jan 2022
Chief Financial Officer
Sold, plan not stated
20,000
$2.29M
28.5%
NET Cloudflare, Inc.
21 Dec 2021
Chief Financial Officer
Sold, plan not stated
20,000
$2.79M
28.5%
NET Cloudflare, Inc.
7 Dec 2021
Chief Financial Officer
Sold, plan not stated
20,000
$3.14M
28.5%
NET Cloudflare, Inc.
23 Nov 2021
Chief Financial Officer
Sold, plan not stated
20,000
$3.67M
28.5%
NET Cloudflare, Inc.
9 Nov 2021
Chief Financial Officer
Sold, plan not stated
20,000
$4.09M
28.5%
NET Cloudflare, Inc.
26 Oct 2021
Chief Financial Officer
Sold, plan not stated
20,000
$3.73M
28.5%
NET Cloudflare, Inc.
12 Oct 2021
Chief Financial Officer
Sold, plan not stated
20,000
$2.97M
28.5%
NET Cloudflare, Inc.
28 Sep 2021
Chief Financial Officer
Sold, plan not stated
20,000
$2.29M
28.5%
NET Cloudflare, Inc.
14 Sep 2021
Chief Financial Officer
Sold, plan not stated
20,000
$2.55M
28.5%
NET Cloudflare, Inc.
31 Aug 2021
Chief Financial Officer
Sold, plan not stated
20,000
$2.43M
28.5%
NET Cloudflare, Inc.
17 Aug 2021
Chief Financial Officer
Sold, plan not stated
20,000
$2.39M
28.5%
NET Cloudflare, Inc.
3 Aug 2021
Chief Financial Officer
Sold, plan not stated
20,000
$2.38M
28.5%
NET Cloudflare, Inc.
20 Jul 2021
Chief Financial Officer
Sold, plan not stated
20,000
$2.14M
28.5%
NET Cloudflare, Inc.
6 Jul 2021
Chief Financial Officer
Sold, plan not stated
20,000
$2.16M
28.5%
NET Cloudflare, Inc.
24 Jun 2021
Chief Financial Officer
Sold, plan not stated
50,000
$5.26M
49.9%
NET Cloudflare, Inc.
22 Jun 2021
Chief Financial Officer
Sold, plan not stated
20,000
$2.05M
28.5%
NET Cloudflare, Inc.
14 Jun 2021
Chief Financial Officer
Sold, plan not stated
50,000
$4.76M
49.9%
NET Cloudflare, Inc.
8 Jun 2021
Chief Financial Officer
Sold, plan not stated
20,000
$1.79M
28.5%
NET Cloudflare, Inc.
25 May 2021
Chief Financial Officer
Sold, plan not stated
20,000
$1.59M
28.5%
NET Cloudflare, Inc.
11 May 2021
Chief Financial Officer
Sold, plan not stated
20,000
$1.40M
28.5%
NET Cloudflare, Inc.
27 Apr 2021
Chief Financial Officer
Sold, plan not stated
20,000
$1.74M
28.5%
NET Cloudflare, Inc.
13 Apr 2021
Chief Financial Officer
Sold, plan not stated
20,000
$1.50M
28.5%
NET Cloudflare, Inc.
30 Mar 2021
Chief Financial Officer
Sold, plan not stated
20,000
$1.30M
28.5%
NET Cloudflare, Inc.
16 Mar 2021
Chief Financial Officer
Sold, plan not stated
20,000
$1.50M
28.5%
NET Cloudflare, Inc.
2 Mar 2021
Chief Financial Officer
Sold, plan not stated
20,000
$1.51M
28.5%
NET Cloudflare, Inc.
19 Feb 2021
Chief Financial Officer
Sold, plan not stated
1,168
$99.61K
2.3%
NET Cloudflare, Inc.
18 Feb 2021
Chief Financial Officer
Sold, plan not stated
30,171
$2.57M
37.6%
NET Cloudflare, Inc.
17 Feb 2021
Chief Financial Officer
Sold, plan not stated
18,661
$1.59M
27.1%
NET Cloudflare, Inc.
16 Feb 2021
Chief Financial Officer
Sold, plan not stated
70,000
$5.76M
58.3%
IPGP IPG PHOTONICS CORP
7 Dec 2020
Director
Sold, plan not stated
11,370
$2.42M
69.0%
NET Cloudflare, Inc.
27 Oct 2020
Chief Financial Officer
Sold, plan not stated
30,000
$1.68M
100%
NET Cloudflare, Inc.
13 Oct 2020
Chief Financial Officer
Sold, plan not stated
30,000
$1.75M
100%
NET Cloudflare, Inc.
29 Sep 2020
Chief Financial Officer
Sold, plan not stated
15,000
$613.73K
100%
NET Cloudflare, Inc.
15 Sep 2020
Chief Financial Officer
Sold, plan not stated
15,000
$536.92K
100%
NET Cloudflare, Inc.
1 Sep 2020
Chief Financial Officer
Sold, plan not stated
15,000
$596.26K
100%
NET Cloudflare, Inc.
18 Aug 2020
Chief Financial Officer
Sold, plan not stated
15,000
$599.47K
100%
NET Cloudflare, Inc.
4 Aug 2020
Chief Financial Officer
Sold, plan not stated
15,000
$630.73K
100%
NET Cloudflare, Inc.
21 Jul 2020
Chief Financial Officer
Sold, plan not stated
15,000
$575.01K
100%
NET Cloudflare, Inc.
7 Jul 2020
Chief Financial Officer
Sold, plan not stated
15,000
$570.64K
100%
NET Cloudflare, Inc.
23 Jun 2020
Chief Financial Officer
Sold, plan not stated
15,000
$535.69K
100%
NET Cloudflare, Inc.
9 Jun 2020
Chief Financial Officer
Sold, plan not stated
15,000
$431.01K
100%
NET Cloudflare, Inc.
26 May 2020
Chief Financial Officer
Sold, plan not stated
15,000
$420.80K
100%
NET Cloudflare, Inc.
12 May 2020
Chief Financial Officer
Sold, plan not stated
15,000
$437.02K
100%
NET Cloudflare, Inc.
28 Apr 2020
Chief Financial Officer
Sold, plan not stated
15,000
$354.11K
100%
NET Cloudflare, Inc.
14 Apr 2020
Chief Financial Officer
Sold, plan not stated
15,000
$348.14K
100%
NET Cloudflare, Inc.
31 Mar 2020
Chief Financial Officer
Sold, plan not stated
15,000
$369.01K
100%
NET Cloudflare, Inc.
17 Mar 2020
Chief Financial Officer
Sold, plan not stated
15,000
$270.00K
100%
NET Cloudflare, Inc.
3 Mar 2020
Chief Financial Officer
Sold, plan not stated
15,000
$329.60K
100%
IPGP IPG PHOTONICS CORP
5 Jun 2017
Director
Sold, plan not stated
2,849
$403.05K
31.0%
IPGP IPG PHOTONICS CORP
1 Jun 2017
Director
Sold, plan not stated
3,950
$552.49K
41.2%
IPGP IPG PHOTONICS CORP
15 Dec 2016
Director
Sold, plan not stated
990
$99.02K
13.1%
NET Cloudflare, Inc.
11 Nov 2002
Chief Financial Officer
Sold, plan not stated
50,000
$2.51M
36.1%
145 decisions on file.