Antero Midstream Corporation
US ˙ NYSE ˙ US03676B1026

SecurityAM / Antero Midstream Corporation
InstitutionNorthern Trust Corp
Latest Disclosed Ownership3,731,568 shares
Latest Disclosed Value $ 85,079,750
Northern Trust Corp reports 0.19% decrease in ownership of AM / Antero Midstream Corporation

On May 14, 2026 - Northern Trust Corp filed a 13F-HR form disclosing ownership of 3,731,568 shares of Antero Midstream Corporation (US:AM) valued at $85,079,750 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 3,738,711 shares of Antero Midstream Corporation. This represents a change in shares of -0.19% during the quarter. The current value of the position is $79,370,451 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)
2026-05-14 2026-03-31 13F ANTERO MIDSTREAM COM 03676B102 3,731,568 -7,143 -0.19 85,080 27.92 0.0023
2026-02-17 2025-12-31 13F ANTERO MIDSTREAM COM 03676B102 3,738,711 -92,445 -2.41 66,512 -10.70 0.0017
2025-11-14 2025-09-30 13F ANTERO MIDSTREAM COM 03676B102 3,831,156 -47,070 -1.21 74,478 1.34 0.0095
2025-08-13 2025-06-30 13F ANTERO MIDSTREAM COM 03676B102 3,878,226 -142,838 -3.55 73,492 1.54 0.0101
2025-05-13 2025-03-31 13F ANTERO MIDSTREAM COM 03676B102 4,021,064 -84,315 -2.05 72,379 16.83 0.0107
2025-02-14 2024-12-31 13F ANTERO MIDSTREAM COM 03676B102 4,105,379 753,939 22.50 61,950 22.82 0.0088
2024-11-13 2024-09-30 13F ANTERO MIDSTREAM COM 03676B102 3,351,440 -281,689 -7.75 50,439 -5.81 0.0083
2024-08-14 2024-06-30 13F ANTERO MIDSTREAM COM 03676B102 3,633,129 799,330 28.21 53,552 34.41 0.0090
2024-05-14 2024-03-31 13F ANTERO MIDSTREAM COM 03676B102 2,833,799 278,171 10.88 39,843 24.42 0.0069
2024-02-13 2023-12-31 13F ANTERO MIDSTREAM COM 03676B102 2,555,628 61,398 2.46 32,022 7.17 0.0058
2023-11-13 2023-09-30 13F ANTERO MIDSTREAM COM 03676B102 2,494,230 -17,214 -0.69 29,881 2.57 0.0058
2023-08-11 2023-06-30 13F ANTERO MIDSTREAM COM 03676B102 2,511,444 -145,162 -5.46 29,133 4.54 0.0056
2023-05-15 2023-03-31 13F ANTERO MIDSTREAM COM 03676B102 2,656,606 -575,131 -17.80 27,868 -20.08 0.0055
2023-02-13 2022-12-31 13F ANTERO MIDSTREAM COM 03676B102 3,231,737 272,775 9.22 34,870 28.37 0.0073
2022-11-14 2022-09-30 13F ANTERO MIDSTREAM COM 03676B102 2,958,962 -150,312 -4.83 27,164 -3.47 0.0062
2022-08-12 2022-06-30 13F ANTERO MIDSTREAM COM 03676B102 3,109,274 -2,668,619 -46.19 28,140 -55.19 0.0060
2022-05-13 2022-03-31 13F ANTERO MIDSTREAM COM 03676B102 5,777,893 -1,172,464 -16.87 62,805 -6.65 0.0110
2022-02-08 2021-12-31 13F ANTERO MIDSTREAM COM 03676B102 6,950,357 -702,367 -9.18 67,279 -15.63 0.0110
2021-11-15 2021-09-30 13F ANTERO MIDSTREAM COM 03676B102 7,652,724 4,699,947 159.17 79,742 159.92 0.0141
2021-08-13 2021-06-30 13F ANTERO MIDSTREAM COM 03676B102 2,952,777 276,874 10.35 30,679 26.97 0.0054
2021-05-12 2021-03-31 13F ANTERO MIDSTREAM COM 03676B102 2,675,903 222,012 9.05 24,163 27.72 0.0045
2021-02-11 2020-12-31 13F ANTERO MIDSTREAM COM 03676B102 2,453,891 -39,140 -1.57 18,919 41.32 0.0037
2020-11-16 2020-09-30 13F ANTERO MIDSTREAM COM 03676B102 2,493,031 131,305 5.56 13,387 11.14 0.0029
2020-08-14 2020-06-30 13F ANTERO MIDSTREAM COM 03676B102 2,361,726 36,097 1.55 12,045 146.62 0.0029
2020-05-14 2020-03-31 13F ANTERO MIDSTREAM COM 03676B102 2,325,629 31,620 1.38 4,884 -71.95 0.0014
2020-02-14 2019-12-31 13F ANTERO MIDSTREAM COM 03676B102 2,294,009 297,135 14.88 17,412 17.84 0.0039
2019-11-13 2019-09-30 13F ANTERO MIDSTREAM COM 03676B102 1,996,874 1,189,860 147.44 14,776 59.78 0.0035
2019-08-13 2019-06-30 13F ANTERO MIDSTREAM COM 03676B102 807,014 459,672 132.34 9,248 93.19 0.0022
2019-05-13 2019-03-31 13F ANTERO MIDSTREAM COM 03676B102 347,342 320,365 1,187.55 4,787 1,485.10 0.0012
2019-02-12 2018-12-31 13F ANTERO MIDSTREAM GP COM 03675Y103 26,977 372 1.40 302 -33.04 0.0001
2019-02-12 2018-12-31 13F ANTERO MIDSTREAM PARTNERS UNT LTD PARTN 03673L103 161,922 512 3,463 0.0010
2018-11-14 2018-09-30 13F ANTERO MIDSTREAM GP COM 03675Y103 26,605 1,359 5.38 451 -5.25 0.0001
2018-11-14 2018-09-30 13F ANTERO MIDSTREAM PARTNERS UNT LTD PARTN 03673L103 161,410 11,480 4,626 0.0011
2018-09-18 2018-06-30 13F/A-1 ANTERO MIDSTREAM GP COM 03675Y103 25,246 -61,392 -70.86 476 -65.63 0.0001
2018-09-18 2018-06-30 13F/A-1 ANTERO MIDSTREAM PARTNERS UNT LTD PARTN 03673L103 149,930 16,898 4,426 0.0011
2018-08-14 2018-06-30 13F ANTERO MIDSTREAM GP COM SHS REPSTG 03675Y103 109,298 22,660 2,061
2018-08-14 2018-06-30 13F ANTERO MIDSTREAM PARTNERS UNT LTD PARTN 03673L103 162,121 29,089 4,786
2018-05-09 2018-03-31 13F ANTERO MIDSTREAM GP COM SHS REPSTG 03675Y103 86,638 72,458 510.99 1,385 396.42 0.0004
2018-05-09 2018-03-31 13F ANTERO MIDSTREAM PARTNERS UNT LTD PARTN 03673L103 133,032 -241 3,444 0.0009
2018-02-14 2017-12-31 13F ANTERO MIDSTREAM GP COM 03675Y103 14,180 -109,257 -88.51 279 -92.83 0.0001
2018-02-14 2017-12-31 13F ANTERO MIDSTREAM PARTNERS UNT LTD PARTN 03673L103 133,273 9,836 3,870 0.0010
2017-11-13 2017-09-30 13F ANTERO MIDSTREAM PARTNERS UNT LTD PARTN 03673L103 123,437 116,046 1,570.10 3,892 1,488.57 0.0010
2017-08-11 2017-06-30 13F ANTERO MIDSTREAM PARTNERS COM 03673L103 7,391 7,391 245 0.0001
2016-08-19 2016-03-31 13F/A-1 ANTERO MIDSTREAM PARTNERS COM 03673L103 0 -31,363 -100.00 0 -100.00
2016-02-12 2015-12-31 13F ANTERO MIDSTREAM PARTNERS COM 03673L103 31,363 7,131 29.43 715 65.13 0.0002
2015-11-12 2015-09-30 13F ANTERO MIDSTREAM PARTNERS COM 03673L103 24,232 -10,483 -30.20 433 -56.44 0.0001
2015-08-13 2015-06-30 13F ANTERO MIDSTREAM PARTNERS COM 03673L103 34,715 34,715 994 0.0007
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.