William Blair & Company’s Antero Resources AR Stock Holding History

William Blair & Company’s Portfolio AR Stock Details AR Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	$807K	Buy	+19,020	New	+$694K	﹤0.01%	1005
2025 Q3	–	Sell	-46,587	Closed	-$1.88M	–	1848
2025 Q2	$1.88M	Buy	46,587 +6,731	+17%	+$255K	0.01%	729
2025 Q1	$1.61M	Buy	39,856 +22,705	+132%	+$871K	﹤0.01%	765
2024 Q4	$601K	Buy	+17,151	New	+$519K	﹤0.01%	1039
2014 Q2	–	Sell	-19,481	Closed	-$1.22M	–	2082
2014 Q1	$1.22M	Sell	19,481 -66,655	-77%	-$3.95M	﹤0.01%	1358
2013 Q4	$5.46M	Buy	+86,136	New	+$4.82M	0.01%	921

Other funds holding AR

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return

VPM

Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return

Invesco Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return

Sourcerock Group Denver, Colorado $2.48B AUM 72.25% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

AQR Capital Management Greenwich, Connecticut $218B AUM 29.41% 1-Year Est. Return

William Blair & Company's AR Position: Q1 2026 in Review

William Blair & Company opened a new position in Antero Resources (AR) in Q1 2026: 19,020 shares worth $807K. The stake represents ﹤0.01% of the portfolio and ranks #1005 among its holdings. This is a return to the name: William Blair & Company previously reported a position in AR as recently as Q2 2025.

William Blair & Company first reported a position in AR in Q4 2013 and has held it in 6 quarters since. The position peaked at $5.46M in Q4 2013. 635 funds tracked by Wall St. Rank hold AR as of Q1 2026.

William Blair & Company held 19,020 shares of Antero Resources worth $807K as of Q1 2026.
Antero Resources was a new William Blair & Company position in Q1 2026.
Antero Resources made up ﹤0.01% of William Blair & Company's portfolio in Q1 2026, its #1005 holding.
William Blair & Company first reported a position in Antero Resources in Q4 2013 and has held it in 6 quarters since.
William Blair & Company's Antero Resources position peaked at $5.46M in Q4 2013.
635 funds tracked by Wall St. Rank held Antero Resources as of Q1 2026.

Based on William Blair & Company's 13F filing for Q1 2026, filed 8 May 2026.