Gulfport Energy Corporation
DE ˙ DB ˙ US4026355028
147,00 € ↑2,00 (1,38%)
2026-06-05
DEL PRIS
SecurityDE:G2U0 / Gulfport Energy Corporation
InstitutionJanus Henderson Group Plc
Latest Disclosed Ownership223,669 shares
Latest Disclosed Value $ 47,323,057
Janus Henderson Group Plc reports 4.24% increase in ownership of G2U0 / Gulfport Energy Corporation

On May 18, 2026 - Janus Henderson Group Plc filed a 13F-HR/A form disclosing ownership of 223,669 shares of Gulfport Energy Corporation (DE:G2U0) valued at $41,826,103 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 214,574 shares of Gulfport Energy Corporation. This represents a change in shares of 4.24% during the quarter. The current value of the position is $32,879,343 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date
Effective
Date
Form Security Class ID Avg Price
Paid (Est)
Reported
Shares
ΔShares ΔShares
(%)
Reported
Value
(x1000)
ΔValue
(%)
Alloc
(%)
ΔAlloc ΔAlloc (%) Cost Basis
(x1000)
Unrealized
Gain/Loss
(x1000)
2026-05-18 2026-03-31 13F/A-1 GULFPORT ENERGY COMMON SHARES 402635502 223,669 9,095 4.24 47,323 6.07 0.0080
2026-05-15 2026-03-31 13F GULFPORT ENERGY COMMON SHARES 402635502 223,669 9,095 47,323 0.0088
2026-02-17 2025-12-31 13F GULFPORT ENERGY COMMON SHARES 402635502 214,574 4,854 2.31 44,616 17.52 0.0200
2025-11-14 2025-09-30 13F GULFPORT ENERGY COMMON SHARES 402635502 209,720 38,254 22.31 37,963 10.08 0.0173
2025-08-14 2025-06-30 13F GULFPORT ENERGY COMMON SHARES 402635502 171,466 -1,759 -1.02 34,488 8.72 0.0169
2025-05-15 2025-03-31 13F GULFPORT ENERGY COMMON SHARES 402635502 173,225 30,112 21.04 31,720 20.33 0.0174
2025-02-14 2024-12-31 13F GULFPORT ENERGY COMMON SHARES 402635502 143,113 0 0.00 26,362 21.70 0.0134
2024-11-14 2024-09-30 13F GULFPORT ENERGY OPERATING COMMON SHARES 402635502 143,113 -87,363 -37.91 21,661 -37.77 0.0111
2024-08-14 2024-06-30 13F GULFPORT ENERGY COMMON SHARES 402635502 230,476 -34,485 -13.02 34,805 -17.96 0.0186
2024-05-15 2024-03-31 13F GULFPORT ENERGY COMMON SHARES 402635502 264,961 -71,196 -21.18 42,423 -5.26 0.0231
2024-02-14 2023-12-31 13F GULFPORT ENERGY COMMON SHARES 402635502 336,157 -4,032 -1.19 44,776 10.93 0.0267
2023-11-14 2023-09-30 13F GULFPORT ENERGY COMMON SHARES 402635502 340,189 -63,535 -15.74 40,367 -4.84 0.0264
2023-08-14 2023-06-30 13F GULFPORT ENERGY COMMON SHARES 402635502 403,724 -168,185 -29.41 42,419 -7.28 0.0264
2023-05-15 2023-03-31 13F GULFPORT ENERGY COMMON SHARES 402635502 571,909 2,114 0.37 45,753 9.04 0.0302
2023-02-14 2022-12-31 13F GULFPORT ENERGY COMMON SHARES 402635502 569,795 37,472 7.04 41,960 -10.72 0.0300
2023-01-13 2022-09-30 13F/A-1 GULFPORT ENERGY COMMON SHARES 402635502 532,323 86,863 19.50 46,999 32.70 0.0352
2022-11-14 2022-09-30 13F GULFPORT ENERGY COMMON SHARES 402635502 532,323 86,863 46,999 0.0352
2022-08-15 2022-06-30 13F GULFPORT ENERGY COMMON SHARES 402635502 445,460 445,460 35,418 0.0244
2019-02-06 2018-12-31 13F GULFPORT ENERGY COM NEW 402635304 0 -5,733,895 -100.00 0 -100.00
2018-11-09 2018-09-30 13F GULFPORT ENERGY COM NEW 402635304 5,733,895 -606,302 -9.56 59,690 -25.10 0.0319
2018-08-10 2018-06-30 13F GULFPORT ENERGY COM NEW 402635304 6,340,197 -1,996,647 -23.95 79,696 -0.94 0.0454
2018-05-14 2018-03-31 13F GULFPORT ENERGY COM NEW 402635304 8,336,844 2,562,631 44.38 80,451 9.19 0.0474
2018-03-12 2017-12-31 13F/A-1 GULFPORT ENERGY COM NEW 402635304 5,774,213 -693,009 -10.72 73,679 -20.55 0.0454
2018-02-09 2017-12-31 13F GULFPORT ENERGY COM NEW 402635304 5,774,213 -693,009 73,679
2017-11-14 2017-09-30 13F GULFPORT ENERGY COM NEW 402635304 6,467,222 1,193,723 22.64 92,740 19.23 0.0594
2017-08-17 2017-06-30 13F/A-1 GULFPORT ENERGY COM NEW 402635304 5,273,499 5,273,499 77,784 0.0530
2017-08-14 2017-06-30 13F GULFPORT ENERGY COM NEW 402635304 5,273,499 5,273,499 77,784
2016-07-29 2016-06-30 13F GULFPORT ENERGY COM NEW 402635304 0 -99,600 -100.00 0 -100.00
2016-05-12 2016-03-31 13F GULFPORT ENERGY COM NEW 402635304 99,600 -98,490 -49.72 2,823 -42.00 0.0229
2016-02-03 2015-12-31 13F GULFPORT ENERGY COM NEW 402635304 198,090 3,207 1.65 4,867 -15.85 0.0391
2015-11-16 2015-09-30 13F GULFPORT ENERGY COM NEW 402635304 194,883 5,393 2.85 5,784 -24.16 0.0509
2015-08-17 2015-06-30 13F GULFPORT ENERGY COM NEW 402635304 189,490 -2,842 -1.48 7,627 -34.96 0.0599
2015-06-02 2015-03-31 13F/A-1 GULFPORT ENERGY COM NEW 402635304 192,332 -15,251 -7.35 11,726 35.33 0.0905
2015-05-15 2015-03-31 13F GULFPORT ENERGY COM NEW 402635304 192,332 11,726
2015-02-12 2014-12-31 13F GULFPORT ENERGY COM NEW 402635304 207,583 207,583 8,665 0.0625
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.