Mariner
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Mariner’s Antero Midstream AM Stock Holding History

Mariner’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
Q1 		$2.41M Buy
105,497
+10,045
+11% +$207K ﹤0.01% 1432
2025
Q4 		$1.7M Sell
95,452
-8,695
-8% -$157K ﹤0.01% 1595
2025
Q3 		$2.02M Sell
104,147
-8,162
-7% -$147K ﹤0.01% 1428
2025
Q2 		$2.13M Buy
112,309
+5,765
+5% +$103K ﹤0.01% 1295
2025
Q1 		$1.92M Buy
106,544
+1,030
+1% +$17.1K ﹤0.01% 1272
2024
Q4 		$1.59M Buy
105,514
+23,577
+29% +$359K ﹤0.01% 1349
2024
Q3 		$1.23M Sell
81,937
-1,277
-2% -$18.6K ﹤0.01% 1463
2024
Q2 		$1.23M Buy
83,214
+6,300
+8% +$90.4K ﹤0.01% 1373
2024
Q1 		$1.08M Sell
76,914
-18,023
-19% -$231K ﹤0.01% 1452
2023
Q4 		$1.19M Buy
94,937
+13,793
+17% +$174K ﹤0.01% 1323
2023
Q3 		$972K Buy
81,144
+36,759
+83% +$435K ﹤0.01% 1338
2023
Q2 		$515K Buy
44,385
+18,612
+72% +$198K ﹤0.01% 1727
2023
Q1 		$270K Buy
25,773
+2,003
+8% +$21.3K ﹤0.01% 2153
2022
Q4 		$256K Buy
23,770
+3,770
+19% +$40K ﹤0.01% 2158
2022
Q3 		$184K Buy
+20,000
New +$197K ﹤0.01% 2082
2022
Q2 		– Sell
-19,091
Closed -$207K – 1376
2022
Q1 		$207K Buy
+19,091
New +$194K ﹤0.01% 1372
2020
Q1 		– Sell
-65,908
Closed -$500K – 703
2019
Q4 		$500K Sell
65,908
-34,903
-35% -$221K 0.01% 610
2019
Q3 		$746K Sell
100,811
-25,411
-20% -$219K 0.01% 524
2019
Q2 		$1.45M Buy
126,222
+20,890
+20% +$268K 0.02% 450
2019
Q1 		$1.45M Buy
105,332
+87,695
+497% +$1.14M 0.02% 426
2018
Q4 		$197K Sell
17,637
-2,812
-14% -$42.9K ﹤0.01% 778
2018
Q3 		$346K Buy
20,449
+185
+0.9% +$3.39K 0.01% 626
2018
Q2 		$382K Sell
20,264
-176
-0.9% -$3.13K 0.01% 599
2018
Q1 		$327K Buy
+20,440
New +$396K 0.01% 513

Other funds holding AM

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
TCA
Tortoise Capital Advisors Overland Park, Kansas $9.6B AUM 19.53% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
Bank of New York Mellon
Bank of New York Mellon New York $544B AUM 28.31% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return
Neuberger Berman Group
Neuberger Berman Group New York $131B AUM 28.36% 1-Year Est. Return

Mariner's AM Position: Q1 2026 in Review

Mariner increased its Antero Midstream (AM) stake by 11% in Q1 2026, buying an estimated $207K and bringing the position to 105,497 shares worth $2.41M. The position accounts for ﹤0.01% of the portfolio, ranked #1432.

Mariner first reported a position in AM in Q1 2018 and has held it in 24 quarters since. 510 funds tracked by Wall St. Rank hold AM as of Q1 2026.

  • Mariner held 105,497 shares of Antero Midstream worth $2.41M as of Q1 2026.
  • Mariner bought 10,045 Antero Midstream shares in Q1 2026, an estimated $207K.
  • Antero Midstream made up ﹤0.01% of Mariner's portfolio in Q1 2026, its #1432 holding.
  • Mariner first reported a position in Antero Midstream in Q1 2018 and has held it in 24 quarters since.
  • 510 funds tracked by Wall St. Rank held Antero Midstream as of Q1 2026.

Based on Mariner's 13F filing for Q1 2026, filed 13 May 2026.