MARTINGALE ASSET MANAGEMENT L P

Position in GPOR — Gulfport Energy Corp

CIK 936944 BOSTON, MA

Position in GPOR

as of Mar 31, 2026 · filed May 13, 2026 Compact

Position Value

$1,333,948

-$58,544 QoQ

Shares Held

6,305

-5.8% QoQ

Ownership

0.035%

of shares outstanding

% of Portfolio

0.03%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Jun 2023

12 quarters on record

Voting authority Sole 47.66058683584457.ToString("F0")% Shared 0.ToString("F0")% None 52.33941316415544.ToString("F0")%

Energy · as of Mar 31, 2026

MARTINGALE ASSET MANAGEMENT L P holds $19,356,085 across 12 Oil & Gas E&P names. GPOR ranks #5 (6.9% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	COP	Conocophillips	53,357	$7,043,124
2	TALO	Talos Energy Inc.	220,730	$3,478,704
3	SM	SM Energy Co	69,826	$2,177,174
4	REPX	Riley Exploration Permian, Inc.	37,041	$1,350,144
5	GPOR	Gulfport Energy Corp This page	6,305	$1,333,948
6	INR	Infinity Natural Resources, Inc.	57,647	$1,015,163
7	CRC	California Resources Corp	14,327	$991,714
8	CHRD	Chord Energy Corp	4,810	$683,885

12 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$1,333,948	6,305	-5.8%	Shares	Sole	2026-05-13
2025-12-31	$1,392,492	6,695	-1.2%	Shares	Sole	2026-02-13
2025-09-30	$1,226,138	6,775	-5.2%	Shares	Sole	2025-11-13
2025-06-30	$1,437,358	7,145	-0.1%	Shares	Sole	2025-08-11
2025-03-31	$1,316,416	7,149	+53.1%	Shares	Sole	2025-05-14
2024-12-31	$860,029	4,669	-37.5%	Shares	Sole	2025-02-13
2024-09-30	$1,130,130	7,467	-44.9%	Shares	Sole	2024-11-14
2024-06-30	$2,045,144	13,544	-30.8%	Shares	Sole	2024-08-12
2024-03-31	$3,132,747	19,565	+2.6%	Shares	Sole	2024-05-14
2023-12-31	$2,539,857	19,068	+29.2%	Shares	Sole	2024-02-12
2023-09-30	$1,751,658	14,762	+81.2%	Shares	Sole	2023-11-14
2023-06-30	$856,005	8,147	—	Shares	Sole	2023-08-11
No filing history on record for this holder in this stock.