SEC Form 4
Gulfport Energy Corporation (GPOR) insider trading
In the 12 months to Oct 23, 2026, 11 GPOR insiders reported open-market sales of $251.7M across 21 filings; one president & CEO bought $257.0K.
Latest filing · Last 12 months · Source: SEC EDGAR · How we count
- Open-market sales
- $251.7M
- 21 filings · 11 insiders
- Open-market purchases
- $257.0K
- 1 filing · Domenic J. Dell'Osso Jr., President & CEO
Who traded GPOR, and when
- Purchase
- Sale
GPOR daily close from Oct 23, 2025 to Oct 23, 2026, between $150.19 and $222.49, last $167.39. 21 sale and 1 purchase filings by 12 insiders, marked at their filing dates. Robert J. O'Shea, Director: sold $165.2M across 2 filings, first filed Dec 3, 2025, last Mar 4, 2026. Edward A. Mule, Director: sold $70.9M across 2 filings, first filed Dec 3, 2025, last Mar 4, 2026. Michael L. Hodges, EVP & CFO: sold $3.5M across 1 filing, first filed Mar 3, 2026, last Mar 3, 2026. Timothy J. Cutt, Director: sold $3.1M across 5 filings, first filed Nov 13, 2025, last Sep 25, 2026. Patrick K. Craine, CLAO and Corp Secretary: sold $2.7M across 2 filings, first filed Jan 6, 2026, last Mar 6, 2026. Michael Sluiter, SVP of Reservoir Engineering: sold $2.5M across 2 filings, first filed Mar 3, 2026, last Mar 6, 2026. Domenic J. Dell'Osso Jr., President & CEO: bought $257.0K across 1 filing, first filed Aug 10, 2026, last Aug 10, 2026. 5 others: sold $3.9M across 7 filings, first filed Nov 13, 2025, last Sep 3, 2026.
Largest mark · tap a row for others
Robert J. O'Shea · Director
Sale $155,154,103
759,740 shares at $204.22 avg
Filed Mar 4, 2026 · traded Mar 2
Close on filing date $209.78
Robert J. O'Shea · Director
Director
$165.2M soldEdward A. Mule · Director
Director
$70.9M soldMichael L. Hodges · EVP & CFO
EVP & CFO
$3.5M soldTimothy J. Cutt · Director
Director
$3.1M soldPatrick K. Craine · CLAO and Corp Secretary
CLAO and Corp Secretary
$2.7M soldMichael Sluiter · SVP of Reservoir Engineering
SVP of Reservoir Engineering
$2.5M soldDomenic J. Dell'Osso Jr. · President & CEO
President & CEO
$257.0K bought5 others
Combined, one mark per week
$3.9M soldHas the Gulfport Energy Corporation's CEO sold stock?
No. Domenic J. Dell'Osso Jr. and John K. Reinhart (CEOs) made no open-market sales filed as CEO in the last 12 months.
Open-market trades
22 filings in the last 12 months| Insider | Role | Sold | Bought | Filings | Pre-arranged (10b5-1) | Last filed |
|---|---|---|---|---|---|---|
| Robert J. O'Shea | Director | $165.2M | — | 2 | — | |
| Edward A. Mule | Director | $70.9M | — | 2 | — | |
| Michael L. Hodges | EVP & CFO | $3.5M | — | 1 | — | |
| Timothy J. Cutt | Director | $3.1M | — | 5 | — | |
| Patrick K. Craine | CLAO and Corp Secretary | $2.7M | — | 2 | — | |
| Michael Sluiter | SVP of Reservoir Engineering | $2.5M | — | 2 | — | |
| Matthew Rucker | EVP & COO | $2.0M | — | 1 | — | |
| Lester Zitkus | SVP, Land | $1.3M | — | 2 | — | |
| David D. Wolf | Director | $320.7K | — | 1 | — | |
| Domenic J. Dell'Osso Jr. | President & CEO | — | $257.0K | 1 | — | |
| Matthew Willrath | VP & CAO | $166.4K | — | 2 | — | |
| Jason Joseph Martinez | Director | $85.4K | — | 1 | — |
| Filed | Insider | Type | Shares | Avg price | Value | Held after | Source |
|---|---|---|---|---|---|---|---|
traded | Timothy J. Cutt Director | Sale | 2,500 | $158.98 | $397.5K | 27,013 | |
traded | Matthew Willrath VP & CAO | Sale | 325 | $182.69 | $59.4K | 2,130 | |
traded | Domenic J. Dell'Osso Jr. President & CEO | Purchase | 1,600 | $160.61 | $257.0K | 24,349 | |
traded | Jason Joseph Martinez Director | Sale | 400 | $213.40 | $85.4K | 3,888 | |
traded | Lester Zitkus SVP, Land | Sale | 1,873 | $213.90 | $400.6K | 5,948 | |
traded | Timothy J. Cutt Director | Sale | 2,500 | $209.13 | $522.8K | 23,755 | |
traded | Michael Sluiter SVP of Reservoir Engineering | Sale | 2,055 | $213.10 | $437.9K | 9,031 | |
traded | Patrick K. Craine CLAO and Corp Secretary | Sale | 2,000 | $209.09 | $418.2K | 12,060 | |
traded | Matthew Willrath VP & CAO | Sale | 497 | $215.28 | $107.0K | 2,589 | |
traded | Robert J. O'Shea Director | Sale | 759,740 | $204.22 | $155.2M | 2,690,145 | |
traded | Edward A. Mule Director | Sale | 84,416 | $204.22 | $17.2M | 2,605,729 | |
traded | Michael L. Hodges EVP & CFO | Sale | 16,769 | $210.70 | $3.5M | 20,112 | |
traded | Timothy J. Cutt Director | Sale | 5,000 | $208.73 | $1.0M | 28,907 | |
traded | Michael Sluiter SVP of Reservoir Engineering | Sale | 9,933 | $210.00 | $2.1M | 11,980 | |
traded | Lester Zitkus SVP, Land | Sale | 4,745 | $185.69 | $881.1K | 8,521 | |
traded | Matthew Rucker EVP & COO | Sale | 10,732 | $186.61 | $2.0M | 22,691 | |
traded | Patrick K. Craine CLAO and Corp Secretary | Sale | 11,929 | $191.87 | $2.3M | 12,340 | |
traded | Timothy J. Cutt Director | Sale | 2,500 | $214.74 | $536.9K | 31,255 | |
traded | Robert J. O'Shea Director | Sale | 45,546 | $219.56 | $10.0M | 3,449,885 | |
traded | Edward A. Mule Director | Sale | 244,489 | $219.56 | $53.7M | 3,495,431 | |
traded | David D. Wolf Director | Sale | 1,525 | $210.27 | $320.7K | 4,462 | |
traded | Timothy J. Cutt Director | Sale | 2,635 | $210.45 | $554.5K | 35,473 |
GET /stocks/filings/vX/form-4?tickers=GPOR&filing_date.gte=2025-10-23&sort=filing_date.desc&limit=500{
"status": "OK",
"results": [
{
"tickers": [
"GPOR"
],
"issuer_cik": "0000874499",
"owner_cik": "0001678505",
"accession_number": "0001678505-26-000010",
"form_type": "4",
"filing_date": "2026-09-25",
"period_of_report": "2026-09-24",
"issuer_name": "GULFPORT ENERGY CORP",
"issuer_trading_symbol": "GPOR",
"owner_name": "Cutt Timothy J.",
"is_director": true,
"is_officer": false,
"is_ten_percent_owner": false,
"is_other": false,
"security_type": "non_derivative",
"record_type": "transaction",
"security_title": "Common Stock",
"transaction_timeliness": "O",
"aff_10b5_one": false,
"transaction_date": "2026-09-24",
"transaction_code": "S",
"equity_swap_involved": false,
"transaction_shares": 2500,
"transaction_price_per_share": 158.98,
"transaction_acquired_disposed": "D",
"shares_owned_following_transaction": 27013,
"transaction_value": 397450,
"not_subject_to_section_16": false,
"direct_or_indirect": "D"
},
{
"tickers": [
"GPOR"
],
"issuer_cik": "0000874499",
"owner_cik": "0001988564",
"accession_number": "0001988564-26-000008",
"form_type": "4",
"filing_date": "2026-09-03",
"period_of_report": "2026-09-02",
"issuer_name": "GULFPORT ENERGY CORP",
"issuer_trading_symbol": "GPOR",
"owner_name": "Willrath Matthew",
"is_director": false,
"is_officer": true,
"is_ten_percent_owner": false,
"is_other": false,
"officer_title": "VP & CAO",
"security_type": "non_derivative",
"record_type": "transaction",
"security_title": "Common Stock",
"transaction_timeliness": "O",
"aff_10b5_one": false,
"transaction_date": "2026-09-02",
"transaction_code": "S",
"equity_swap_involved": false,
"transaction_shares": 325,
"transaction_price_per_share": 182.69,
"transaction_acquired_disposed": "D",
"shares_owned_following_transaction": 2130,
"transaction_value": 59374.25,
"not_subject_to_section_16": false,
"direct_or_indirect": "D"
}
]
}
// trimmed to 2 resultsThe response includes every Form 4 record; this page keeps open-market purchases and sales on common stock and removes duplicate joint-filer rows.
Other insider activity (not market trades) · 42 records
- Tax withholding19 records
- Grants and awards22 records
- Gifts1 record
Reported on Form 4 but not purchases or sales in the market, so not counted in the totals above.
Build this yourself
This page joins two Massive endpoints: Form 4 filings and daily prices. Ask an agent to watch for new filings:
Using the Massive API (massive.com/docs/llms.txt), check Form 4 filings for GPOR every day with transaction_code=P and tell me when an insider files an open-market purchase, with their role, shares, price and the filing link.
How to read this page
- Open-market purchase or sale
- A buy or sell of the company's stock at market price. Grants, option exercises, shares withheld for tax, gifts and employee stock plan purchases are listed separately and not counted.
- Filing date
- Insiders have two business days to report a trade. Totals and the chart use the filing date, when the trade became public.
- Counted once
- When several owners (a fund and its partners, say) report the same trade, it's counted once. Corrected filings replace the originals.