WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC

Position in AR — ANTERO RESOURCES Corp

CIK 1644956 CHICAGO, IL

Position in AR

as of Mar 31, 2026 · filed May 8, 2026 Compact

Position Value

$16,329,851

-$5,256,582 QoQ

Shares Held

384,775

-38.6% QoQ

Ownership

0.124%

of shares outstanding

% of Portfolio

0.05%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Mar 2024

9 quarters on record

Voting authority Sole 86.68832434539667.ToString("F0")% Shared 0.ToString("F0")% None 13.311675654603338.ToString("F0")%

Energy · as of Mar 31, 2026

WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC holds $173,293,259 across 7 Oil & Gas E&P names. AR ranks #5 (9.4% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	GPOR	Gulfport Energy Corp	198,845	$42,069,636
2	VIST	Vista Energy, S.A.B. de C.V.	556,283	$41,982,678
3	MTDR	Matador Resources Co	622,880	$39,353,558
4	BKV	BKV Corp	1,153,767	$32,905,434
5	AR	ANTERO RESOURCES Corp This page	384,775	$16,329,851
6	EXE	EXPAND ENERGY Corp	3,154	$346,246
7	PR	Permian Resources Corp	14,346	$305,856

9 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$16,329,851	384,775	-38.6%	Shares	Sole	2026-05-08
2025-12-31	$21,586,433	626,420	+25.0%	Shares	Sole	2026-02-09
2025-09-30	$16,823,091	501,284	-43.9%	Shares	Sole	2025-11-12
2025-06-30	$35,967,019	892,925	-6.9%	Shares	Sole	2025-07-29
2025-03-31	$38,784,022	959,051	-33.1%	Shares	Sole	2025-05-09
2024-12-31	$50,266,852	1,434,147	+4.3%	Shares	Sole	2025-02-10
2024-09-30	$39,385,384	1,374,708	+3.7%	Shares	Sole	2024-11-08
2024-06-30	$43,262,974	1,325,865	+52.0%	Shares	Sole	2024-08-08
2024-03-31	$25,288,319	872,011	—	Shares	Sole	2024-05-08
No filing history on record for this holder in this stock.