Antero Midstream Corporation
US ˙ NYSE ˙ US03676B1026

SecurityAM / Antero Midstream Corporation
InstitutionBlackstone Group Inc
Latest Disclosed Ownership2,811,631 shares
Latest Disclosed Value $ 64,105,187
Blackstone Group Inc reports 0.51% increase in ownership of AM / Antero Midstream Corporation

On May 15, 2026 - Blackstone Group Inc filed a 13F-HR form disclosing ownership of 2,811,631 shares of Antero Midstream Corporation (US:AM) valued at $64,105,187 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 2,797,376 shares of Antero Midstream Corporation. This represents a change in shares of 0.51% during the quarter. The current value of the position is $59,803,391 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

Upgrade to unlock premium data and export to Excel .

Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F ANTERO MIDSTREAM COM 03676B102 2,811,631 14,255 0.51 64,105 28.82 0.2503
2026-02-17 2025-12-31 13F ANTERO MIDSTREAM COM 03676B102 2,797,376 -34,659 -1.22 49,765 -9.61 0.1966
2025-11-14 2025-09-30 13F ANTERO MIDSTREAM COM 03676B102 2,832,035 435,941 18.19 55,055 21.25 0.2216
2025-08-14 2025-06-30 13F ANTERO MIDSTREAM COM 03676B102 2,396,094 2,224,250 1,294.34 45,406 1,367.99 0.1939
2025-05-15 2025-03-31 13F ANTERO MIDSTREAM COM 03676B102 171,844 -1,562,184 -90.09 3,093 -88.18 0.0128
2025-02-14 2024-12-31 13F ANTERO MIDSTREAM COM 03676B102 1,734,028 8,138 0.47 26,166 0.74 0.1191
2024-11-14 2024-09-30 13F ANTERO MIDSTREAM COM 03676B102 1,725,890 1,004,085 139.11 25,975 144.14 0.1133
2024-08-14 2024-06-30 13F ANTERO MIDSTREAM COM 03676B102 721,805 -1,722 -0.24 10,639 4.59 0.0445
2024-05-15 2024-03-31 13F ANTERO MIDSTREAM COM 03676B102 723,527 -3,046 -0.42 10,173 11.74 0.0411
2024-02-14 2023-12-31 13F ANTERO MIDSTREAM COM 03676B102 726,573 -16,338 -2.20 9,104 2.28 0.0409
2023-11-14 2023-09-30 13F ANTERO MIDSTREAM COM 03676B102 742,911 -20,558 -2.69 8,900 0.50 0.0373
2023-08-14 2023-06-30 13F ANTERO MIDSTREAM COM 03676B102 763,469 5,841 0.77 8,856 11.44 0.0379
2023-05-15 2023-03-31 13F ANTERO MIDSTREAM COM 03676B102 757,628 565,288 293.90 7,948 282.99 0.0325
2023-02-14 2022-12-31 13F ANTERO MIDSTREAM COM 03676B102 192,340 -27,667 -12.58 2,075 103,650.00 0.0079
2023-02-10 2022-09-30 13F/A-1 ANTERO MIDSTREAM COM 03676B102 220,007 61,543 38.84 2 -99.86 0.0075
2022-11-14 2022-09-30 13F ANTERO MIDSTREAM COM 03676B102 220,007 61,543 2,020 0.0063
2022-08-15 2022-06-30 13F ANTERO MIDSTREAM COM 03676B102 158,464 -9,181 -5.48 1,434 -21.30 0.0048
2022-05-16 2022-03-31 13F ANTERO MIDSTREAM COM 03676B102 167,645 -94,620 -36.08 1,822 -28.24 0.0046
2022-02-14 2021-12-31 13F ANTERO MIDSTREAM COM 03676B102 262,265 -19,356 -6.87 2,539 -13.46 0.0064
2022-01-28 2021-09-30 13F/A-1 ANTERO MIDSTREAM COM 03676B102 281,621 47,979 20.54 2,934 20.84 0.0065
2021-11-16 2021-09-30 13F ANTERO MIDSTREAM COM 03676B102 281,621 47,979 2,934 0.0066
2021-08-18 2021-06-30 13F/A-1 ANTERO MIDSTREAM COM 03676B102 233,642 -5,724,750 -96.08 2,428 -95.49 0.0055
2021-08-16 2021-06-30 13F ANTERO MIDSTREAM COM 03676B102 233,642 -5,724,750 2,428 0.0039
2021-05-19 2021-03-31 13F/A-1 ANTERO MIDSTREAM COM 03676B102 5,958,392 -7,536,046 -55.85 53,804 -48.29 0.1072
2021-05-17 2021-03-31 13F ANTERO MIDSTREAM COM 03676B102 5,958,392 -7,536,046 53,804 0.0916
2021-02-16 2020-12-31 13F ANTERO MIDSTREAM COM 03676B102 13,494,438 -3,109,696 -18.73 104,042 16.69 0.3658
2020-11-16 2020-09-30 13F ANTERO MIDSTREAM COM 03676B102 16,604,134 -675,732 -3.91 89,164 1.18 0.3458
2020-08-18 2020-06-30 13F/A-1 ANTERO MIDSTREAM COM 03676B102 17,279,866 17,279,866 88,127 0.3725
2020-08-14 2020-06-30 13F ANTERO MIDSTREAM COM 03676B102 17,279,866 17,279,866 88,127 198,591.6079
2018-05-15 2018-03-31 13F ANTERO MIDSTREAM GP COM SHS REPSTG 03675Y103 0 -6,090,106 -100.00 0 -100.00
2018-02-14 2017-12-31 13F ANTERO MIDSTREAM PARTNERS UNT LTD PARTN 03673L103 6,090,106 6,090,106 176,857 0.7200
2018-02-14 2017-12-31 13F ANTERO MIDSTREAM GP COM SHS REPSTG 03675Y103 409,431 -5,680,675 8,074 0.0329
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.