Domenic J. Dell'Osso Jr.

Insider · President & CEO · GPOR

Domenic J. Dell'Osso Jr. files insider transactions with the SEC as a president & ceo of Gulfport Energy (GPOR). We hold 1 disclosed purchase or sale filed since 9 November 2010, 1 of them in the last 90 days.

Files forGPOR
Disclosed buys and sells1 in all, 1 in the last 90 days
Last disclosure10 August 2026

Positions held

6 posts we hold — a term names its own dates; a run of filings only says when they filed

Filed 28 May 2026 — 7 August 2026President & CEO · Gulfport Energy (GPOR)2 Form 4 lines · source: SEC Form 4
Filed 12 May 2023 — 22 May 2026Director · Transocean (RIG)4 Form 4 lines · source: SEC Form 4
Filed 11 October 2024 — 15 August 2025President and CEO · Expand Energy (EXE)15 Form 4 lines · source: SEC Form 4
Filed 5 November 2010 — 28 May 2024President and CEO · Chesapeake Energy (CHK)111 Form 4 lines · source: SEC Form 4
Filed 5 May 2020 — 7 January 2021Exec. Vice President & CFO · Chesapeake Energy (CHKAQ)10 Form 4 lines · source: SEC Form 4
Filed 6 February 2018 — 6 February 2018Director · FTS International (FTSI)1 Form 4 line · source: SEC Form 4

Everything they disclosed

120 entries, newest first — one per disclosure report, one per Form 4 line

▲ bought on the open market 1,600 shares of Gulfport EnergySEC Form 410 August 2026Common Stock · traded 7 August 2026 · filed 10 August 2026
was granted 22,749 shares of Gulfport EnergySEC Form 41 June 2026Common Stock · traded 28 May 2026 · filed 1 June 2026
was granted 30,435 shares of Transocean (a derivative holding)SEC Form 427 May 2026Restricted Units · traded 22 May 2026 · filed 27 May 2026
▲ bought on the open market 2,500 shares of Expand EnergySEC Form 418 August 2025Common Stock · traded 15 August 2025 · filed 18 August 2025
was granted 82,353 shares of Transocean (a derivative holding)SEC Form 42 June 2025Restricted Units · traded 30 May 2025 · filed 2 June 2025
exercised options over 31,822 shares of Expand Energy (a derivative holding)SEC Form 417 March 2025Performance Share Unit · traded 15 March 2025 · filed 17 March 2025
exercised options over 15,911 shares of Expand Energy (a derivative holding)SEC Form 417 March 2025Performance Share Unit · traded 15 March 2025 · filed 17 March 2025
was granted 26,209 shares of Expand Energy (a derivative holding)SEC Form 417 March 2025Performance Share Unit · traded 15 March 2025 · filed 17 March 2025
was granted 26,209 shares of Expand Energy (a derivative holding)SEC Form 417 March 2025Performance Share Unit · traded 15 March 2025 · filed 17 March 2025
exercised options over 63,644 shares of Expand EnergySEC Form 417 March 2025Common Stock · traded 15 March 2025 · filed 17 March 2025
exercised options over 10,056 shares of Expand EnergySEC Form 417 March 2025Common Stock · traded 15 March 2025 · filed 17 March 2025
was granted 22,465 shares of Expand EnergySEC Form 417 March 2025Common Stock · traded 15 March 2025 · filed 17 March 2025
had shares withheld for tax on 32,503 shares of Expand EnergySEC Form 417 March 2025Common Stock · traded 15 March 2025 · filed 17 March 2025
had shares withheld for tax on 7,292 shares of Expand EnergySEC Form 417 March 2025Common Stock · traded 15 March 2025 · filed 17 March 2025
▲ bought on the open market 2,500 shares of Expand EnergySEC Form 45 March 2025Common Stock · traded 5 March 2025 · filed 5 March 2025
exercised options over 6,356 shares of Expand Energy (a derivative holding)SEC Form 415 October 2024Performance Share Unit · traded 11 October 2024 · filed 15 October 2024
exercised options over 9,420 shares of Expand EnergySEC Form 415 October 2024Common Stock · traded 11 October 2024 · filed 15 October 2024
had shares withheld for tax on 4,155 shares of Expand EnergySEC Form 415 October 2024Common Stock · traded 11 October 2024 · filed 15 October 2024
had shares withheld for tax on 312 shares of Expand EnergySEC Form 415 October 2024Common Stock · traded 11 October 2024 · filed 15 October 2024
exercised options over 44,583 shares of Chesapeake Energy (a derivative holding)SEC Form 430 May 2024Performance Share Unit · traded 28 May 2024 · filed 30 May 2024
exercised options over 80,621 shares of Chesapeake EnergySEC Form 430 May 2024Common Stock · traded 28 May 2024 · filed 30 May 2024
had shares withheld for tax on 35,555 shares of Chesapeake EnergySEC Form 430 May 2024Common Stock · traded 28 May 2024 · filed 30 May 2024
had shares withheld for tax on 2,185 shares of Chesapeake EnergySEC Form 430 May 2024Common Stock · traded 28 May 2024 · filed 30 May 2024
was granted 36,145 shares of Transocean (a derivative holding)SEC Form 417 May 2024Restricted Units · traded 17 May 2024 · filed 17 May 2024
was granted 50,909 shares of Chesapeake Energy (a derivative holding)SEC Form 419 March 2024Performance Share Unit · traded 15 March 2024 · filed 19 March 2024
had shares withheld for tax on 4,799 shares of Chesapeake EnergySEC Form 419 March 2024Common Stock · traded 15 March 2024 · filed 19 March 2024
was granted 16,970 shares of Chesapeake EnergySEC Form 419 March 2024Common Stock · traded 15 March 2024 · filed 19 March 2024
had shares withheld for tax on 312 shares of Chesapeake EnergySEC Form 412 October 2023Common Stock · traded 11 October 2023 · filed 12 October 2023
had shares withheld for tax on 2,185 shares of Chesapeake EnergySEC Form 431 May 2023Common Stock · traded 28 May 2023 · filed 31 May 2023
was granted 35,654 shares of Transocean (a derivative holding)SEC Form 415 May 2023Restricted Units · traded 12 May 2023 · filed 15 May 2023
was granted 50,160 shares of Chesapeake Energy (a derivative holding)SEC Form 416 March 2023Performance Share Unit · traded 15 March 2023 · filed 16 March 2023
had shares withheld for tax on 2,277 shares of Chesapeake EnergySEC Form 416 March 2023Common Stock · traded 15 March 2023 · filed 16 March 2023
was granted 16,720 shares of Chesapeake EnergySEC Form 416 March 2023Common Stock · traded 15 March 2023 · filed 16 March 2023
had shares withheld for tax on 2,185 shares of Chesapeake EnergySEC Form 412 October 2022Common Stock · traded 11 October 2022 · filed 12 October 2022
had shares withheld for tax on 312 shares of Chesapeake EnergySEC Form 412 October 2022Common Stock · traded 11 October 2022 · filed 12 October 2022
▲ bought on the open market 3,000 shares of Chesapeake EnergySEC Form 428 June 2022Common Stock · traded 24 June 2022 · filed 28 June 2022
was granted 44,583 shares of Chesapeake Energy (a derivative holding)SEC Form 417 March 2022Performance Share Unit · traded 11 October 2021 · filed 17 March 2022
was granted 6,356 shares of Chesapeake Energy (a derivative holding)SEC Form 417 March 2022Performance Share Unit · traded 11 October 2021 · filed 17 March 2022
was granted 14,861 shares of Chesapeake EnergySEC Form 417 March 2022Common Stock · traded 11 October 2021 · filed 17 March 2022
was granted 2,119 shares of Chesapeake EnergySEC Form 417 March 2022Common Stock · traded 11 October 2021 · filed 17 March 2022
was granted 47,773 shares of Chesapeake Energy (a derivative holding)SEC Form 417 March 2022Performance Share Unit · traded 15 March 2022 · filed 17 March 2022
was granted 15,911 shares of Chesapeake EnergySEC Form 417 March 2022Common Stock · traded 15 March 2022 · filed 17 March 2022
was granted 59,444 shares of Chesapeake Energy (a derivative holding)SEC Form 413 October 2021Performance Share Unit · traded 11 October 2021 · filed 13 October 2021
was granted 8,474 shares of Chesapeake Energy (a derivative holding)SEC Form 413 October 2021Performance Share Unit · traded 11 October 2021 · filed 13 October 2021
was granted 14,861 shares of Chesapeake EnergySEC Form 413 October 2021Common Stock · traded 11 October 2021 · filed 13 October 2021
was granted 2,119 shares of Chesapeake EnergySEC Form 413 October 2021Common Stock · traded 11 October 2021 · filed 13 October 2021
▼ sold on the open market 1,474 shares of Chesapeake EnergySEC Form 48 January 2021Common Stock · traded 7 January 2021 · filed 8 January 2021
▼ sold on the open market 2,424 shares of Chesapeake EnergySEC Form 48 January 2021Common Stock · traded 7 January 2021 · filed 8 January 2021
returned to the issuer 2,585 shares of Chesapeake Energy (a derivative holding)SEC Form 428 December 2020Non-Qualified Stock Option (right to buy) · traded 5 May 2020 · filed 28 December 2020
returned to the issuer 299 shares of Chesapeake Energy (a derivative holding)SEC Form 428 December 2020Non-Qualified Stock Option (right to buy) · traded 5 May 2020 · filed 28 December 2020
returned to the issuer 697 shares of Chesapeake Energy (a derivative holding)SEC Form 428 December 2020Non-Qualified Stock Option (right to buy) · traded 5 May 2020 · filed 28 December 2020
returned to the issuer 4,662 shares of Chesapeake Energy (a derivative holding)SEC Form 428 December 2020Non-Qualified Stock Option (right to buy) · traded 5 May 2020 · filed 28 December 2020
returned to the issuer 1,572 shares of Chesapeake Energy (a derivative holding)SEC Form 428 December 2020Non-Qualified Stock Option (right to buy) · traded 5 May 2020 · filed 28 December 2020
returned to the issuer 3,055 shares of Chesapeake Energy (a derivative holding)SEC Form 428 December 2020Non-Qualified Stock Option (right to buy) · traded 5 May 2020 · filed 28 December 2020
returned to the issuer 8,632 shares of Chesapeake EnergySEC Form 428 December 2020Common Stock · traded 5 May 2020 · filed 28 December 2020
▼ sold on the open market 3,685 shares of Chesapeake EnergySEC Form 428 December 2020Common Stock · traded 23 December 2020 · filed 28 December 2020
had shares withheld for tax on 54,024 shares of Chesapeake EnergySEC Form 420 March 2020Common Stock · traded 19 March 2020 · filed 20 March 2020
was granted 1,000,000 shares of Chesapeake EnergySEC Form 416 March 2020Common Stock · traded 15 March 2020 · filed 16 March 2020
had shares withheld for tax on 27,124 shares of Chesapeake EnergySEC Form 416 March 2020Common Stock · traded 15 March 2020 · filed 16 March 2020
had shares withheld for tax on 87,108 shares of Chesapeake EnergySEC Form 49 March 2020Common Stock · traded 7 March 2020 · filed 9 March 2020
had shares withheld for tax on 179,322 shares of Chesapeake EnergySEC Form 431 January 2020Common Stock · traded 29 January 2020 · filed 31 January 2020
was granted 356,566 shares of Chesapeake EnergySEC Form 43 January 2020Common Stock · traded 31 December 2019 · filed 3 January 2020
▲ bought on the open market 50,000 shares of Chesapeake EnergySEC Form 428 May 2019Common Stock · traded 24 May 2019 · filed 28 May 2019
had shares withheld for tax on 54,026 shares of Chesapeake EnergySEC Form 421 March 2019Common Stock · traded 19 March 2019 · filed 21 March 2019
had shares withheld for tax on 27,126 shares of Chesapeake EnergySEC Form 418 March 2019Common Stock · traded 15 March 2019 · filed 18 March 2019
was granted 589,226 shares of Chesapeake EnergySEC Form 411 March 2019Common Stock · traded 7 March 2019 · filed 11 March 2019
had shares withheld for tax on 59,838 shares of Chesapeake EnergySEC Form 416 January 2019Common Stock · traded 14 January 2019 · filed 16 January 2019
was granted 125,646 shares of Chesapeake EnergySEC Form 43 January 2019Common Stock · traded 31 December 2018 · filed 3 January 2019
▲ bought on the open market 50,000 shares of Chesapeake EnergySEC Form 420 December 2018Common Stock · traded 20 December 2018 · filed 20 December 2018
was granted 611,112 shares of Chesapeake Energy (a derivative holding)SEC Form 421 March 2018Non-Qualified Stock Option (right to buy) · traded 19 March 2018 · filed 21 March 2018
was granted 365,449 shares of Chesapeake EnergySEC Form 421 March 2018Common Stock · traded 19 March 2018 · filed 21 March 2018
had shares withheld for tax on 27,126 shares of Chesapeake EnergySEC Form 419 March 2018Common Stock · traded 15 March 2018 · filed 19 March 2018
▲ bought on the open market 6,000 shares of FTS InternationalSEC Form 46 February 2018Common Stock · traded 6 February 2018 · filed 6 February 2018
had shares withheld for tax on 29,487 shares of Chesapeake EnergySEC Form 416 January 2018Common Stock · traded 14 January 2018 · filed 16 January 2018
had shares withheld for tax on 5,124 shares of Chesapeake EnergySEC Form 411 January 2018Common Stock · traded 10 January 2018 · filed 11 January 2018
was granted 73,048 shares of Chesapeake EnergySEC Form 43 January 2018Common Stock · traded 29 December 2017 · filed 3 January 2018
was granted 183,487 shares of Chesapeake EnergySEC Form 417 March 2017Common Stock · traded 15 March 2017 · filed 17 March 2017
was granted 314,466 shares of Chesapeake Energy (a derivative holding)SEC Form 417 March 2017Non-Qualified Stock Option (right to buy) · traded 15 March 2017 · filed 17 March 2017
had shares withheld for tax on 29,041 shares of Chesapeake EnergySEC Form 417 January 2017Common Stock · traded 14 January 2017 · filed 17 January 2017
had shares withheld for tax on 7,847 shares of Chesapeake EnergySEC Form 412 January 2017Common Stock · traded 10 January 2017 · filed 12 January 2017
was granted 42,214 shares of Chesapeake EnergySEC Form 44 January 2017Common Stock · traded 31 December 2016 · filed 4 January 2017
had shares withheld for tax on 8,665 shares of Chesapeake EnergySEC Form 41 February 2016Common Stock · traded 29 January 2016 · filed 1 February 2016
was granted 377,359 shares of Chesapeake EnergySEC Form 419 January 2016Common Stock · traded 14 January 2016 · filed 19 January 2016
was granted 591,716 shares of Chesapeake Energy (a derivative holding)SEC Form 419 January 2016Non-Qualified Stock Option (right to buy) · traded 14 January 2016 · filed 19 January 2016
was granted 340,909 shares of Chesapeake Energy (a derivative holding)SEC Form 419 January 2016Non-Qualified Stock Option (right to buy) · traded 14 January 2016 · filed 19 January 2016
had shares withheld for tax on 7,006 shares of Chesapeake EnergySEC Form 412 January 2016Common Stock · traded 10 January 2016 · filed 12 January 2016
was granted 6,506 shares of Chesapeake EnergySEC Form 45 January 2016Common Stock · traded 31 December 2015 · filed 5 January 2016
had shares withheld for tax on 10,534 shares of Chesapeake EnergySEC Form 45 January 2016Common Stock · traded 3 January 2016 · filed 5 January 2016
was granted 3,994 shares of Chesapeake EnergySEC Form 42 October 2015Common Stock · traded 30 September 2015 · filed 2 October 2015
was granted 2,247 shares of Chesapeake EnergySEC Form 42 July 2015Common Stock · traded 30 June 2015 · filed 2 July 2015
had shares withheld for tax on 9,353 shares of Chesapeake EnergySEC Form 42 July 2015Common Stock · traded 1 July 2015 · filed 2 July 2015
was granted 14,726 shares of Chesapeake EnergySEC Form 42 April 2015Common Stock · traded 31 March 2015 · filed 2 April 2015
had shares withheld for tax on 12,636 shares of Chesapeake EnergySEC Form 42 February 2015Common Stock · traded 29 January 2015 · filed 2 February 2015
had shares withheld for tax on 2,774 shares of Chesapeake EnergySEC Form 413 January 2015Common Stock · traded 10 January 2015 · filed 13 January 2015
was granted 40,828 shares of Chesapeake EnergySEC Form 413 January 2015Common Stock · traded 10 January 2015 · filed 13 January 2015
was granted 139,406 shares of Chesapeake Energy (a derivative holding)SEC Form 413 January 2015Non-Qualified Stock Option (right to buy) · traded 10 January 2015 · filed 13 January 2015
was granted 1,282 shares of Chesapeake EnergySEC Form 45 January 2015Common Stock · traded 31 December 2014 · filed 5 January 2015
had shares withheld for tax on 14,114 shares of Chesapeake EnergySEC Form 45 January 2015Common Stock · traded 3 January 2015 · filed 5 January 2015
had shares withheld for tax on 2,504 shares of Chesapeake EnergySEC Form 46 November 2014Common Stock · traded 5 November 2014 · filed 6 November 2014
was granted 1,274 shares of Chesapeake EnergySEC Form 42 October 2014Common Stock · traded 30 September 2014 · filed 2 October 2014
was granted 807 shares of Chesapeake EnergySEC Form 42 July 2014Common Stock · traded 30 June 2014 · filed 2 July 2014
had shares withheld for tax on 11,301 shares of Chesapeake EnergySEC Form 42 July 2014Common Stock · traded 1 July 2014 · filed 2 July 2014
was granted 8,907 shares of Chesapeake EnergySEC Form 42 April 2014Common Stock · traded 31 March 2014 · filed 2 April 2014
had shares withheld for tax on 11,923 shares of Chesapeake EnergySEC Form 430 January 2014Common Stock · traded 29 January 2014 · filed 30 January 2014
was granted 24,067 shares of Chesapeake EnergySEC Form 414 January 2014Common Stock · traded 10 January 2014 · filed 14 January 2014
was granted 57,239 shares of Chesapeake Energy (a derivative holding)SEC Form 414 January 2014Non-Qualified Stock Option (right to buy) · traded 10 January 2014 · filed 14 January 2014
was granted 925 shares of Chesapeake EnergySEC Form 47 January 2014Common Stock · traded 31 December 2013 · filed 7 January 2014
had shares withheld for tax on 9,136 shares of Chesapeake EnergySEC Form 47 January 2014Common Stock · traded 3 January 2014 · filed 7 January 2014
had shares withheld for tax on 4,633 shares of Chesapeake EnergySEC Form 47 January 2014Common Stock · traded 3 January 2014 · filed 7 January 2014
had shares withheld for tax on 2,360 shares of Chesapeake EnergySEC Form 47 January 2014Common Stock · traded 4 January 2014 · filed 7 January 2014
had shares withheld for tax on 2,360 shares of Chesapeake EnergySEC Form 46 November 2013Common Stock · traded 5 November 2013 · filed 6 November 2013
was granted 1,131 shares of Chesapeake EnergySEC Form 42 October 2013Common Stock · traded 30 September 2013 · filed 2 October 2013
was granted 1,232 shares of Chesapeake EnergySEC Form 43 July 2013Common Stock · traded 30 June 2013 · filed 3 July 2013
had shares withheld for tax on 13,661 shares of Chesapeake EnergySEC Form 43 July 2013Common Stock · traded 1 July 2013 · filed 3 July 2013
was granted 4,803 shares of Chesapeake EnergySEC Form 42 April 2013Common Stock · traded 31 March 2013 · filed 2 April 2013
was granted 75,780 shares of Chesapeake EnergySEC Form 431 January 2013Common Stock · traded 29 January 2013 · filed 31 January 2013
was granted 494,260 shares of Chesapeake Energy (a derivative holding)SEC Form 431 January 2013Non-Qualified Stock Option (right to buy) · traded 29 January 2013 · filed 31 January 2013
had shares withheld for tax on 13,091 shares of Chesapeake EnergySEC Form 47 January 2013Common Stock · traded 3 January 2013 · filed 7 January 2013
had shares withheld for tax on 1,631 shares of Chesapeake EnergySEC Form 47 January 2013Common Stock · traded 4 January 2013 · filed 7 January 2013
was granted 1,510 shares of Chesapeake EnergySEC Form 43 January 2013Common Stock · traded 31 December 2012 · filed 3 January 2013

Positions come from the unitedstates/congress-legislators roster, the Office of Government Ethics and the SEC’s Form 4 index. Every disclosed line names its own source and links the document the government published; we print what the filing says and never a price we did not read from it. Headlines and links come from the GDELT Global Knowledge Graph — the story stays with the publisher. The portrait, where we have one, is the public-domain Congressional Bioguide photograph.