Filer Snapshot

Mark N. Tompkins SEC EDGAR Filings

SEC filings, ownership reports, and insider transactions for CIK 0001455971.

Entity Type

Individual

Total Filings

128

Latest Filing

17 Feb 2026

Industry

n/a

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Go to latest filings table Open reporting owner context
Source: SEC Schedule 13D/G

SCHEDULE 13G filed on 17 Feb 2026 for CIK 0001455971.

View Source Filing
Business address
App. 1, Via Guidino 23, Lugano Paradiso
Top holdings (ownership)
ALMU, SERV, GUER, AMST, and Venetian-1 Acquisition Corp.
Top holdings (Schedule 13G)
ALMU, PMNT, Deep Fission, Inc., Var Acquisition Corp., Range Acquisition Corp., Lomond Therapeutics Holdings, Inc., Primus Acquisition Inc., Deep Isolation Nuclear, Inc., Los Altos Ventures Corp., and Orielle Acquisition Corp.

Quick Takeaways

  • Mark N. Tompkins is an SEC filer tracked under CIK 0001455971.
  • 128 filings are listed on this profile.
  • Common form coverage includes SCHEDULE 13G, SCHEDULE 13G/A, 4 and more.

What Changed

  • Latest filing: SCHEDULE 13G filed on 17 Feb 2026.
  • Report period: not specified in filing header.

Why This Matters

  • You can quote filing dates and form types directly from the SEC record on this page.
  • Use this profile before deeper ownership or insider analysis to confirm filing history context.

Source Evidence

Source: SEC Schedule 13D/G

SCHEDULE 13G filed on 17 Feb 2026 for CIK 0001455971.

View Source Filing

Return Loop

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A newly filed SCHEDULE 13G can change the filing history, ownership context, or next research path for Mark N. Tompkins.

Latest source-backed update
SCHEDULE 13G filed 17 Feb 2026
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Revisit after a new SEC filing appears to compare the updated record with prior filings.
  • Latest filing on record: SCHEDULE 13G filed 17 Feb 2026.
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Filer freshness comes from SEC EDGAR submission history and related source-backed ownership or portfolio filings when available.

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Latest update

What changed recently for Mark N. Tompkins

New filing available

Latest Schedule 13D/G period: 31 Dec 2025. Open the source-backed page to inspect the fresh filing or facts context.

Update date

17 Feb 2026

Page type

Filer profile

Latest period

31 Dec 2025

Schedule 13D/G context is visible from filings filed on 17 Feb 2026.

Open filer profile Browse recent public updates

Filer Overview

Mark N. Tompkins has filed 128 SEC EDGAR filings since 11 Feb 2009. Common forms include SCHEDULE 13G, SCHEDULE 13G/A, 4, 3 and more.

Reporting owner transactions Latest 13F filings

Latest Filings

Recent SEC filings for Mark N. Tompkins with direct links to document and filing folders.

Form type Document Filing Description Filing date Reporting date File number(s)
SCHEDULE 13G Open SCHEDULE 13G document View SEC filing for SCHEDULE 13G 17 Feb 2026
SCHEDULE 13G Open SCHEDULE 13G document View SEC filing for SCHEDULE 13G 17 Feb 2026
SCHEDULE 13G/A Open SCHEDULE 13G/A document View SEC filing for SCHEDULE 13G/A 17 Feb 2026
4 Open 4 document View SEC filing for 4 05 Feb 2026 04 Feb 2026 001-42570
4 Open 4 document View SEC filing for 4 02 Feb 2026 29 Jan 2026 001-42570
3 Open 3 document View SEC filing for 3 26 Jan 2026 26 Jan 2026 000-56799
4 Open 4 document View SEC filing for 4 22 Jan 2026 20 Jan 2026 001-42570
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 29 Dec 2025 23 Dec 2025 001-42570
4 Open 4 document View SEC filing for 4 22 Dec 2025 18 Dec 2025 001-42570
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 11 Dec 2025 09 Dec 2025 001-42570
4 Open 4 document View SEC filing for 4 09 Dec 2025 04 Dec 2025 001-42570
3 Open 3 document View SEC filing for 3 01 Dec 2025 01 Dec 2025 000-56784
SCHEDULE 13G Open SCHEDULE 13G document View SEC filing for SCHEDULE 13G 14 Nov 2025
SCHEDULE 13G Open SCHEDULE 13G document View SEC filing for SCHEDULE 13G 14 Nov 2025
SCHEDULE 13G Open SCHEDULE 13G document View SEC filing for SCHEDULE 13G 14 Nov 2025
SCHEDULE 13G/A Open SCHEDULE 13G/A document View SEC filing for SCHEDULE 13G/A 14 Nov 2025
SCHEDULE 13G/A Open SCHEDULE 13G/A document View SEC filing for SCHEDULE 13G/A 14 Nov 2025
SCHEDULE 13G/A Open SCHEDULE 13G/A document View SEC filing for SCHEDULE 13G/A 14 Nov 2025
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 21 Oct 2025 17 Oct 2025 001-42570
4 Open 4 document View SEC filing for 4 17 Oct 2025 15 Oct 2025 001-42570
4 Open 4 document View SEC filing for 4 14 Oct 2025 10 Oct 2025 001-42570
4 Open 4 document View SEC filing for 4 09 Oct 2025 07 Oct 2025 001-42570
4 Open 4 document View SEC filing for 4 06 Oct 2025 02 Oct 2025 001-42570
4/A Open 4/A document View SEC filing for 4/A 06 Oct 2025 29 Sep 2025 001-42570
4 Open 4 document View SEC filing for 4 02 Oct 2025 29 Sep 2025 001-42570
3 Open 3 document View SEC filing for 3 30 Sep 2025 30 Sep 2025 000-56769
3 Open 3 document View SEC filing for 3 30 Sep 2025 30 Sep 2025 000-56770
4 Open 4 document View SEC filing for 4 08 Sep 2025 05 Sep 2025 000-56407
4 Open 4 document View SEC filing for 4 28 Aug 2025 26 Aug 2025 000-56749
4 Open 4 document View SEC filing for 4 28 Aug 2025 26 Aug 2025 000-56407
4 Open 4 document View SEC filing for 4 25 Jul 2025 23 Jul 2025 000-56406
4 Open 4 document View SEC filing for 4 18 Jul 2025 16 Jul 2025 000-56406
3 Open 3 document View SEC filing for 3 14 Jul 2025 14 Jul 2025 000-56749
SCHEDULE 13G/A Open SCHEDULE 13G/A document View SEC filing for SCHEDULE 13G/A 03 Apr 2025
4 Open 4 document View SEC filing for 4 31 Mar 2025 27 Mar 2025 001-42570
SCHEDULE 13G/A Open SCHEDULE 13G/A document View SEC filing for SCHEDULE 13G/A 14 Feb 2025
SCHEDULE 13G/A Open SCHEDULE 13G/A document View SEC filing for SCHEDULE 13G/A 14 Feb 2025
SC 13G Open SC 13G document View SEC filing for SC 13G 14 Nov 2024
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 05 Nov 2024 01 Nov 2024 000-56377
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A AMENDMENT NO. 3 TO SCHEDULE 13G 14 Aug 2024
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A AMENDMENT NO. 2 TO SCHEDULE 13G 14 Aug 2024
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A AMENDMENT NO. 3 TO SCHEDULE 13G 14 Feb 2024
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A AMENDMENT NO. 1 TO SCHEDULE 13G 14 Feb 2024
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A AMENDMENT NO. 2 TO SCHEDULE 13G 14 Feb 2024
4 Open 4 document View SEC filing for 4 02 Aug 2023 31 Jul 2023 000-56237
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A AMENDMENT NO. 2 TO SCHEDULE 13G 14 Feb 2023
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A AMENDMENT NO. 2 TO SCHEDULE 13G 14 Feb 2023
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A AMENDMENT NO. 1 TO SCHEDULE 13G 14 Feb 2023
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A AMENDMENT NO. 1 TO SCHEDULE 13G 14 Feb 2023
SC 13G Open SC 13G document View SEC filing for SC 13G SCHEDULE 13G 10 Feb 2023
SC 13G Open SC 13G document View SEC filing for SC 13G SCHEDULE 13G 10 Feb 2023
SC 13G Open SC 13G document View SEC filing for SC 13G SCHEDULE 13G 10 Feb 2023
4 Open 4 document View SEC filing for 4 13 Jan 2023 22 Dec 2022 000-56218
3 Open 3 document View SEC filing for 3 20 Apr 2022 20 Apr 2022 000-56407
3 Open 3 document View SEC filing for 3 20 Apr 2022 20 Apr 2022 000-56406
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A AMENDMENT NO. 1 TO SCHEDULE 13G 14 Feb 2022
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A AMENDMENT NO. 1 TO SCHEDULE 13G 14 Feb 2022
SC 13G Open SC 13G document View SEC filing for SC 13G SCHEDULE 13G 14 Feb 2022
SC 13G Open SC 13G document View SEC filing for SC 13G SCHEDULE 13G 14 Feb 2022
3 Open 3 document View SEC filing for 3 OWNERSHIP DOCUMENT 10 Feb 2022 10 Feb 2022 000-56377
SC 13G Open SC 13G document View SEC filing for SC 13G SCHEDULE 13G 23 Nov 2021
4 Open 4 document View SEC filing for 4 16 Nov 2021 12 Nov 2021 000-56238
4 Open 4 document View SEC filing for 4 25 Oct 2021 21 Oct 2021 000-56238
3 Open 3 document View SEC filing for 3 OWNERSHIP DOCUMENT 26 Jul 2021 05 Mar 2021 000-56237
3 Open 3 document View SEC filing for 3 14 Jul 2021 05 Mar 2021 000-56238
4 Open 4 document View SEC filing for 4 29 Jun 2021 22 Jun 2021 000-56218
4 Open 4 document View SEC filing for 4 23 Jun 2021 21 Jun 2021 000-56218
4 Open 4 document View SEC filing for 4 02 Jun 2021 28 May 2021 001-39553
4 Open 4 document View SEC filing for 4 27 May 2021 25 May 2021 001-39553
4 Open 4 document View SEC filing for 4 24 May 2021 20 May 2021 001-39553
4 Open 4 document View SEC filing for 4 19 May 2021 17 May 2021 001-39553
4 Open 4 document View SEC filing for 4 14 May 2021 12 May 2021 001-39553
4 Open 4 document View SEC filing for 4 11 May 2021 07 May 2021 001-39553
4 Open 4 document View SEC filing for 4 06 May 2021 04 May 2021 001-39553
4 Open 4 document View SEC filing for 4 03 May 2021 29 Apr 2021 001-39553
4 Open 4 document View SEC filing for 4 28 Apr 2021 26 Apr 2021 001-39553
4 Open 4 document View SEC filing for 4 20 Apr 2021 15 Apr 2021 001-39553
4 Open 4 document View SEC filing for 4 14 Apr 2021 12 Apr 2021 001-39553
4 Open 4 document View SEC filing for 4 09 Apr 2021 08 Apr 2021 001-39553
4 Open 4 document View SEC filing for 4 07 Apr 2021 05 Apr 2021 001-39553
4 Open 4 document View SEC filing for 4 01 Apr 2021 30 Mar 2021 001-39553
4 Open 4 document View SEC filing for 4 05 Mar 2021 04 Mar 2021 001-39553
4 Open 4 document View SEC filing for 4 FORM 4 25 Feb 2021 23 Feb 2021 000-56181
SC 13G Open SC 13G document View SEC filing for SC 13G SCHEDULE 13G 16 Feb 2021
SC 13G Open SC 13G document View SEC filing for SC 13G SCHEDULE 13G 16 Feb 2021
3 Open 3 document View SEC filing for 3 01 Dec 2020 01 Dec 2020 000-56218
3 Open 3 document View SEC filing for 3 28 Oct 2020 17 Aug 2020 000-56181
4 Open 4 document View SEC filing for 4 07 Oct 2020 05 Oct 2020 000-56036
4 Open 4 document View SEC filing for 4 29 Sep 2020 29 Sep 2020 001-39553
3 Open 3 document View SEC filing for 3 25 Sep 2020 24 Sep 2020 001-39553
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A AMENDMENT NO. 1 TO SCHEDULE 13G 18 Feb 2020
4 Open 4 document View SEC filing for 4 14 Feb 2020 12 Feb 2020 000-55832
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A AMENDMENT NO. 1 TO SCHEDULE 13G 14 Feb 2020
3 Open 3 document View SEC filing for 3 13 May 2019 13 May 2019 000-56036
SC 13G Open SC 13G document View SEC filing for SC 13G SCHEDULE 13G 13 Feb 2019
SC 13G Open SC 13G document View SEC filing for SC 13G SCHEDULE 13G 13 Feb 2019
3 Open 3 document View SEC filing for 3 28 Sep 2018 28 Oct 2017 000-55832
4 Open 4 document View SEC filing for 4 06 Sep 2018 06 Sep 2018 000-55804
3 Open 3 document View SEC filing for 3 30 Jul 2018 29 Jul 2018 000-55939
SC 13D Open SC 13D document View SEC filing for SC 13D SCHEDULE 13D 07 May 2018
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 01 May 2018 27 Apr 2018 000-55804
3 Open 3 document View SEC filing for 3 OWNERSHIP DOCUMENT 01 May 2018 26 Aug 2017 000-55804
SC 13G Open SC 13G document View SEC filing for SC 13G SC 13G 15 Feb 2018
SC 13G Open SC 13G document View SEC filing for SC 13G SC 13G 14 Feb 2018
4 Open 4 document View SEC filing for 4 4 29 Dec 2017 27 Dec 2017 001-38029
4 Open 4 document View SEC filing for 4 4 27 Dec 2017 22 Dec 2017 001-38029
4 Open 4 document View SEC filing for 4 4 22 Dec 2017 21 Dec 2017 001-38029
4 Open 4 document View SEC filing for 4 4 21 Dec 2017 19 Dec 2017 001-38029
SC 13D/A Open SC 13D/A document View SEC filing for SC 13D/A AMENDMENT NO. 1 TO SCHEDULE 13D 20 Oct 2017
4 Open 4 document View SEC filing for 4 4 29 Sep 2017 28 Sep 2017 001-38029
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 28 Sep 2017 26 Sep 2017 000-55764
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 26 Sep 2017 22 Sep 2017 000-55764
4 Open 4 document View SEC filing for 4 4 22 Sep 2017 20 Sep 2017 001-38029
4 Open 4 document View SEC filing for 4 4 14 Sep 2017 12 Sep 2017 001-38029
4 Open 4 document View SEC filing for 4 4 12 Sep 2017 08 Sep 2017 001-38029
4 Open 4 document View SEC filing for 4 4 08 Sep 2017 06 Sep 2017 001-38029
4 Open 4 document View SEC filing for 4 4 12 Jul 2017 10 Jul 2017 001-38029
SC 13D Open SC 13D document View SEC filing for SC 13D SCHEDULE 13D 26 Jun 2017
4 Open 4 document View SEC filing for 4 OWNERSHIP DOCUMENT 19 Jun 2017 15 Jun 2017 000-55764
3 Open 3 document View SEC filing for 3 OWNERSHIP DOCUMENT 22 May 2017 20 May 2017 000-55764
3 Open 3 document View SEC filing for 3 3 13 Mar 2017 10 Mar 2017 001-38029
SC 13G Open SC 13G document View SEC filing for SC 13G SC 13G 16 Feb 2016
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A SC 13G/A 24 Nov 2015
SC 13G Open SC 13G document View SEC filing for SC 13G SC 13G 10 Jul 2015
SC 13G Open SC 13G document View SEC filing for SC 13G SC 13G 17 Feb 2015
SC 13G Open SC 13G document View SEC filing for SC 13G 09 May 2011
SC 13G Open SC 13G document View SEC filing for SC 13G 03 May 2011

About this filer

Mark N. Tompkins files with the SEC under CIK 0001455971. This page aggregates EDGAR filings and related ownership activity.

FAQ

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