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 Q2	$1.03M	Buy	29,332 +10,312	+54%	+$380K	﹤0.01%	966
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 $6.73T AUM 46.02% 1-Year Est. Return

Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return

State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

Sourcerock Group Denver, Colorado $1.92B AUM 45.54% 1-Year Est. Return

Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return

AQR Capital Management Greenwich, Connecticut $287B AUM 42.33% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

William Blair & Company's AR Position: Q2 2026 in Review

William Blair & Company increased its Antero Resources (AR) stake by 54% in Q2 2026, buying an estimated $380K and bringing the position to 29,332 shares worth $1.03M. The position accounts for ﹤0.01% of the portfolio, ranked #966.

William Blair & Company first reported a position in AR in Q4 2013 and has held it in 7 quarters since. The position peaked at $5.46M in Q4 2013. 630 funds tracked by Wall St. Rank hold AR as of Q2 2026.

William Blair & Company held 29,332 shares of Antero Resources worth $1.03M as of Q2 2026.
William Blair & Company bought 10,312 Antero Resources shares in Q2 2026, an estimated $380K.
Antero Resources made up ﹤0.01% of William Blair & Company's portfolio in Q2 2026, its #966 holding.
William Blair & Company first reported a position in Antero Resources in Q4 2013 and has held it in 7 quarters since.
William Blair & Company's Antero Resources position peaked at $5.46M in Q4 2013.
630 funds tracked by Wall St. Rank held Antero Resources as of Q2 2026.

Based on William Blair & Company's 13F filing for Q2 2026, filed 11 Aug 2026.