Antero Midstream Corporation
US ˙ NYSE ˙ US03676B1026

SecurityAM / Antero Midstream Corporation
InstitutionMorgan Stanley
Latest Disclosed Ownership6,255,526 shares
Latest Disclosed Value $ 142,626,030
Morgan Stanley reports 3.67% increase in ownership of AM / Antero Midstream Corporation

On May 15, 2026 - Morgan Stanley filed a 13F-HR form disclosing ownership of 6,255,526 shares of Antero Midstream Corporation (US:AM) valued at $142,625,993 USD as of March 31, 2026. The entity filed a previous 13F-HR/A on May 27, 2026 disclosing 6,034,114 shares of Antero Midstream Corporation. This represents a change in shares of 3.67% during the quarter. The current value of the position is $133,055,038 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.

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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 6,255,526 221,412 3.67 142,626 32.87 0.0086
2026-05-27 2025-12-31 13F/A-1 ANTERO MIDSTREAM COM 03676B102 6,034,114 -362,398 -5.67 107,347 -13.67 0.0064
2026-02-13 2025-12-31 13F ANTERO MIDSTREAM COM 03676B102 6,034,114 -362,398 107,347 0.0064
2026-05-27 2025-09-30 13F/A-1 ANTERO MIDSTREAM COM 03676B102 6,396,512 -615,458 -8.78 124,348 -6.42 0.0075
2025-11-14 2025-09-30 13F ANTERO MIDSTREAM COM 03676B102 6,396,512 -615,458 124,348 0.0075
2025-08-15 2025-06-30 13F ANTERO MIDSTREAM COM 03676B102 7,011,970 1,083,125 18.27 132,877 24.51 0.0087
2025-05-15 2025-03-31 13F ANTERO MIDSTREAM COM 03676B102 5,928,845 -194,647 -3.18 106,719 15.49 0.0076
2025-05-15 2024-12-31 13F/A-1 ANTERO MIDSTREAM COM 03676B102 6,123,492 282,282 4.83 92,404 5.11 0.0065
2025-02-14 2024-12-31 13F ANTERO MIDSTREAM COM 03676B102 6,123,492 282,282 92,404 0.0065
2025-05-14 2024-09-30 13F/A-2 ANTERO MIDSTREAM COM 03676B102 5,841,210 -62,874 -1.06 87,910 1.02 0.0064
2025-02-14 2024-09-30 13F/A-1 ANTERO MIDSTREAM COM 03676B102 5,841,210 -62,874 87,910 0.0064
2024-11-14 2024-09-30 13F ANTERO MIDSTREAM COM 03676B102 5,841,210 -62,874 87,910 0.0008
2025-05-14 2024-06-30 13F/A-2 ANTERO MIDSTREAM COM 03676B102 5,904,084 46,804 0.80 87,026 5.67 0.0067
2024-10-17 2024-06-30 13F/A-1 ANTERO MIDSTREAM COM 03676B102 5,904,084 46,804 87,026 0.0067
2024-08-14 2024-06-30 13F ANTERO MIDSTREAM COM 03676B102 5,904,084 46,804 87,026 0.0067
2024-10-17 2024-03-31 13F/A-2 ANTERO MIDSTREAM COM 03676B102 5,857,280 437,585 8.07 82,353 21.27 0.0066
2024-08-16 2024-03-31 13F/A-1 ANTERO MIDSTREAM COM 03676B102 5,857,280 437,585 82,353 0.0008
2024-05-15 2024-03-31 13F ANTERO MIDSTREAM COM 03676B102 5,857,280 437,585 82,353 0.0066
2024-08-16 2023-12-31 13F/A-1 ANTERO MIDSTREAM COM 03676B102 5,419,695 212,937 4.09 67,909 8.87 0.0060
2024-02-13 2023-12-31 13F ANTERO MIDSTREAM COM 03676B102 5,419,695 212,937 67,909 0.0060
2023-11-15 2023-09-30 13F ANTERO MIDSTREAM COM 03676B102 5,206,758 438,489 9.20 62,377 12.77 0.0063
2023-08-14 2023-06-30 13F ANTERO MIDSTREAM COM 03676B102 4,768,269 427,491 9.85 55,312 21.47 0.0055
2023-05-15 2023-03-31 13F ANTERO MIDSTREAM COM 03676B102 4,340,778 -466,551 -9.70 45,535 -12.22 0.0049
2023-02-14 2022-12-31 13F ANTERO MIDSTREAM COM 03676B102 4,807,329 679,796 16.47 51,871 36.90 0.0059
2022-11-14 2022-09-30 13F ANTERO MIDSTREAM COM 03676B102 4,127,533 -138,181 -3.24 37,890 -1.85 0.0052
2022-10-27 2022-06-30 13F/A-1 ANTERO MIDSTREAM COM 03676B102 4,265,714 2,232,060 109.76 38,605 74.64 0.0050
2022-08-15 2022-06-30 13F ANTERO MIDSTREAM COM 03676B102 4,265,714 2,232,060 38,605 0.0010
2022-10-27 2022-03-31 13F/A-1 ANTERO MIDSTREAM COM 03676B102 2,033,654 -210,811 -9.39 22,105 1.74 0.0030
2022-05-13 2022-03-31 13F ANTERO MIDSTREAM COM 03676B102 2,033,654 -210,811 22,105 0.0030
2022-02-14 2021-12-31 13F ANTERO MIDSTREAM COM 03676B102 2,244,465 -265,069 -10.56 21,726 -16.91 0.0027
2021-11-15 2021-09-30 13F ANTERO MIDSTREAM COM 03676B102 2,509,534 -1,035,351 -29.21 26,148 -29.01 0.0035
2021-08-23 2021-06-30 13F/A-1 ANTERO MIDSTREAM COM 03676B102 3,544,885 -147,689 -4.00 36,833 10.46 0.0049
2021-08-16 2021-06-30 13F ANTERO MIDSTREAM COM 03676B102 3,544,885 -147,689 36,833 0.0010
2021-05-17 2021-03-31 13F ANTERO MIDSTREAM COM 03676B102 3,692,574 600,214 19.41 33,345 39.86 0.0049
2021-02-16 2020-12-31 13F ANTERO MIDSTREAM COM 03676B102 3,092,360 498,196 19.20 23,842 71.14 0.0037
2020-11-13 2020-09-30 13F ANTERO MIDSTREAM COM 03676B102 2,594,164 -249,724 -8.78 13,931 -3.95 0.0027
2020-08-14 2020-06-30 13F ANTERO MIDSTREAM COM 03676B102 2,843,888 1,007,526 54.87 14,504 276.04 0.0032
2020-05-26 2020-03-31 13F/A-1 ANTERO MIDSTREAM COM 03676B102 1,836,362 -9,310 -0.50 3,857 -72.47 0.0010
2020-05-15 2020-03-31 13F ANTERO MIDSTREAM COM 03676B102 1,836,362 -9,310 3,857 296.2980
2020-02-14 2019-12-31 13F ANTERO MIDSTREAM COM 03676B102 1,845,672 -945,895 -33.88 14,009 -32.19 0.0033
2019-11-14 2019-09-30 13F ANTERO MIDSTREAM COM 03676B102 2,791,567 1,707,437 157.49 20,658 66.29 0.0055
2019-08-14 2019-06-30 13F ANTERO MIDSTREAM COM 03676B102 1,084,130 57,413 5.59 12,423 -12.19 0.0033
2019-05-15 2019-03-31 13F ANTERO MIDSTREAM COM 03676B102 1,026,717 360,809 54.18 14,148 90.03 0.0040
2019-02-14 2018-12-31 13F ANTERO MIDSTREAM GP COM SHS REPSTG 03675Y103 665,908 -282,008 -29.75 7,445 -53.58 0.0022
2019-02-14 2018-12-31 13F ANTERO MIDSTREAM PARTNERS UNT LTD PARTN 03673L103 751,157 -57,322 16,068 0.0048
2019-04-23 2018-09-30 13F/A-2 ANTERO MIDSTREAM GP COM SHS REPSTG 03675Y103 947,916 -32,396 -3.30 16,039 -13.25 0.0040
2019-04-23 2018-09-30 13F/A-2 ANTERO MIDSTREAM PARTNERS UNT LTD PARTN 03673L103 808,479 -568,930 23,171 0.0058
2018-11-20 2018-09-30 13F/A-1 ANTERO MIDSTREAM GP COM SHS REPSTG 03675Y103 947,916 139,437 16,039 0.0040
2018-11-20 2018-09-30 13F/A-1 ANTERO MIDSTREAM PARTNERS UNT LTD PARTN 03673L103 808,479 -139,437 23,171 0.0058
2018-11-14 2018-09-30 13F ANTERO MIDSTREAM GP COM SHS REPSTG 03675Y103 947,916 -32,396 16,039
2018-11-14 2018-09-30 13F ANTERO MIDSTREAM PARTNERS UNT LTD PARTN 03673L103 808,479 -568,930 23,171
2019-04-23 2018-06-30 13F/A-1 ANTERO MIDSTREAM GP COM SHS REPSTG 03675Y103 980,312 19,631 2.04 18,489 20.36 0.0050
2019-04-23 2018-06-30 13F/A-1 ANTERO MIDSTREAM PARTNERS UNT LTD PARTN 03673L103 1,377,409 -505,471 40,661 0.0110
2018-08-14 2018-06-30 13F ANTERO MIDSTREAM GP COM SHS REPSTG 03675Y103 980,312 19,631 18,489
2018-08-14 2018-06-30 13F ANTERO MIDSTREAM PARTNERS UNT LTD PARTN 03673L103 1,377,409 -505,471 40,661
2019-04-23 2018-03-31 13F/A-1 ANTERO MIDSTREAM GP COM SHS REPSTG 03675Y103 960,681 26,974 2.89 15,361 -16.58 0.0043
2019-04-23 2018-03-31 13F/A-1 ANTERO MIDSTREAM PARTNERS UNT LTD PARTN 03673L103 1,882,880 -1,726,287 48,747 0.0135
2018-05-14 2018-03-31 13F ANTERO MIDSTREAM GP COM SHS REPSTG 03675Y103 960,681 26,974 15,361
2018-05-14 2018-03-31 13F ANTERO MIDSTREAM PARTNERS UNT LTD PARTN 03673L103 1,882,880 -1,726,287 48,747
2019-04-23 2017-12-31 13F/A-1 ANTERO MIDSTREAM GP COM SHS REPSTG 03675Y103 933,707 906,089 3,280.79 18,413 3,158.94 0.0050
2019-04-23 2017-12-31 13F/A-1 ANTERO MIDSTREAM PARTNERS UNT LTD PARTN 03673L103 3,609,167 896,826 104,811 0.0287
2018-02-14 2017-12-31 13F ANTERO MIDSTREAM GP COM SHS REPSTG 03675Y103 933,707 906,089 18,413
2018-02-14 2017-12-31 13F ANTERO MIDSTREAM PARTNERS UNT LTD PARTN 03673L103 3,609,167 896,826 104,811
2017-11-14 2017-09-30 13F ANTERO MIDSTREAM GP COM SHS REPSTG 03675Y103 27,618 2,352 9.31 565 1.80 0.0002
2017-11-14 2017-09-30 13F ANTERO MIDSTREAM PARTNERS UNT LTD PARTN 03673L103 2,712,341 -185,506 85,521 0.0256
2017-08-11 2017-06-30 13F ANTERO MIDSTREAM GP COM SHS REPSTG 03675Y103 25,266 -3,902,176 -99.36 555 -99.57 0.0002
2017-08-11 2017-06-30 13F ANTERO MIDSTREAM PARTNERS UNT LTD PARTN 03673L103 2,897,847 -1,029,595 96,150 0.0290
2017-05-22 2017-03-31 13F/A-1 ANTERO MIDSTREAM PARTNERS UNT LTD PARTN 03673L103 3,927,442 -711,578 -15.34 130,234 -9.09 0.0400
2017-05-12 2017-03-31 13F ANTERO MIDSTREAM PARTNERS UNT LTD PARTN 03673L103 3,927,442 130,234
2017-02-22 2016-12-31 13F/A-1 ANTERO MIDSTREAM PARTNERS UNT LTD PARTN 03673L103 4,639,020 -992,796 -17.63 143,254 -4.73 0.0469
2017-02-13 2016-12-31 13F ANTERO MIDSTREAM PARTNERS UNT LTD PARTN 03673L103 4,639,020 143,254
2016-11-10 2016-09-30 13F ANTERO MIDSTREAM PARTNERS UNT LTD PARTN 03673L103 5,631,816 -1,013,809 -15.26 150,369 -18.81 0.0514
2016-08-12 2016-06-30 13F ANTERO MIDSTREAM PARTNERS UNT LTD PARTN 03673L103 6,645,625 50,264 0.76 185,213 27.01 0.0669
2016-05-12 2016-03-31 13F ANTERO MIDSTREAM PARTNERS UNT LTD PARTN 03673L103 6,595,361 1,254,089 23.48 145,824 19.64 0.0561
2016-02-09 2015-12-31 13F ANTERO MIDSTREAM PARTNERS UNT LTD PARTN 03673L103 5,341,272 715,829 15.48 121,887 47.54 0.0441
2016-02-08 2015-09-30 13F/A-1 ANTERO MIDSTREAM PARTNERS UNT LTD PARTN 03673L103 4,625,443 1,309,894 39.51 82,611 -13.00 0.0305
2015-11-09 2015-09-30 13F ANTERO MIDSTREAM PARTNERS UNT LTD PARTN 03673L103 4,625,443 82,611
2015-08-12 2015-06-30 13F ANTERO MIDSTREAM PARTNERS UNT LTD PARTN 03673L103 3,315,549 2,464,534 289.60 94,957 361.27 0.0329
2015-05-14 2015-03-31 13F ANTERO MIDSTREAM PARTNERS UNT LTD PARTN 03673L103 851,015 -325,220 -27.65 20,586 -36.36 0.0076
2015-02-13 2014-12-31 13F ANTERO MIDSTREAM PARTNERS UNT LTD PARTN 03673L103 1,176,235 1,176,235 32,346 0.0118
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.