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SIR Capital Management’s Antero Midstream AM Stock Holding History

SIR Capital Management’s Portfolio AM Stock Details AM Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$10.6M Buy
+467,598
New +$10.2M 1.22% 28
2026
Q1 		– Sell
-1,772,534
Closed -$31.5M – 89
2025
Q4 		$31.5M Buy
1,772,534
+389,185
+28% +$7.01M 3.49% 7
2025
Q3 		$26.9M Buy
1,383,349
+1,266,794
+1,087% +$22.9M 2.41% 13
2025
Q2 		$2.21M Sell
116,555
-1,190,997
-91% -$21.3M 0.2% 73
2025
Q1 		$23.5M Sell
1,307,552
-1,015,718
-44% -$16.8M 2.07% 18
2024
Q4 		$35.1M Buy
+2,323,270
New +$35.4M 3.61% 5
2024
Q3 		– Sell
-559,774
Closed -$8.25M – 69
2024
Q2 		$8.25M Buy
+559,774
New +$8.03M 0.82% 48
2024
Q1 		– Sell
-913,811
Closed -$11.5M – 70
2023
Q4 		$11.5M Buy
913,811
+305,000
+50% +$3.85M 1.17% 31
2023
Q3 		$7.29M Buy
+608,811
New +$7.21M 0.87% 39

Other funds holding AM

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
TCA
Tortoise Capital Advisors Overland Park, Kansas $9.84B AUM 26.47% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return
Neuberger Berman Group
Neuberger Berman Group New York $150B AUM 40.08% 1-Year Est. Return
Bank of New York Mellon
Bank of New York Mellon New York $609B AUM 40.19% 1-Year Est. Return

SIR Capital Management's AM Position: Q2 2026 in Review

SIR Capital Management opened a new position in Antero Midstream (AM) in Q2 2026: 467,598 shares worth $10.6M. The stake represents 1.22% of the portfolio and ranks #28 among its holdings. This is a return to the name: SIR Capital Management previously reported a position in AM as recently as Q4 2025.

SIR Capital Management first reported a position in AM in Q3 2023 and has held it in 9 quarters since. The position peaked at $35.1M in Q4 2024. 533 funds tracked by Wall St. Rank hold AM as of Q2 2026.

  • SIR Capital Management held 467,598 shares of Antero Midstream worth $10.6M as of Q2 2026.
  • Antero Midstream was a new SIR Capital Management position in Q2 2026.
  • Antero Midstream made up 1.22% of SIR Capital Management's portfolio in Q2 2026, its #28 holding.
  • SIR Capital Management first reported a position in Antero Midstream in Q3 2023 and has held it in 9 quarters since.
  • SIR Capital Management's Antero Midstream position peaked at $35.1M in Q4 2024.
  • 533 funds tracked by Wall St. Rank held Antero Midstream as of Q2 2026.

Based on SIR Capital Management's 13F filing for Q2 2026, filed 14 Aug 2026.