Antero Midstream Corporation
US ˙ NYSE ˙ US03676B1026

SecurityAM / Antero Midstream Corporation
InstitutionVanguard Group Inc
Latest Disclosed Ownership0 shares
Ownership 0.00%
Vanguard Group Inc ownership in AM / Antero Midstream Corporation

2026-03-26 - Vanguard Group Inc has filed an SCHEDULE 13G/A form with the Securities and Exchange Commission (SEC) disclosing ownership of 0 shares of Antero Midstream Corporation (US:AM). This represents 0.0 percent ownership of the company. In their previous filing dated 2024-02-13 , Vanguard Group Inc had reported owning 35,545,837 shares, indicating a decrease of -100.00 percent.

Institutional Ownership: 13D/G Filings

This table shows a history of the 13D/G filings made by the investor and/or investor group. Note that the share values in this table are not directly comparable to any numbers shown in the 13F table (if any).

File
Date		Effective
Date		Form Prev
Shares		 Latest
Shares		 ΔShares
(Percent)		 Ownership
(Percent)		 ΔOwnership
(Percent)
2026-03-26 2026-03-26 13G/A 35,545,837 0 -100.00 0.00 -100.00
2024-02-13 2024-02-13 13G/A 32,912,960 35,545,837 8.00 7.41 7.70
2023-02-09 2023-02-09 13G/A 31,049,765 32,912,960 6.00 6.88 5.85
2022-02-09 2022-02-09 13G/A 29,049,749 31,049,765 6.88 6.50 6.73
2021-02-10 2021-02-10 13G/A 25,910,468 29,049,749 12.12 6.09 18.48
2020-02-11 2020-02-11 13G 25,910,468 5.14

Important Note: One of the primary uses of the 13D/G filings is to evaluate the ability of a firm to control a company (ie, the "beneficial ownership"). To that end, firms are required to report not just direct holdings in companies, but indirect holdings that they control. For investment firms, these indirect holdings can include shares in funds they manage, advisory accounts, and in the case of activist campaigns, pledged votes. Therefore, share counts listed in 13D/G filings can differ significantly than share counts listed in 13F filings.

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)
2026-01-29 2025-12-31 13F ANTERO MIDSTREAM COM 03676B102 36,075,910 -1,137,274 -3.06 641,790 -11.28 0.0093
2025-11-07 2025-09-30 13F ANTERO MIDSTREAM COM 03676B102 37,213,184 124,102 0.33 723,424 2.93 0.0108
2025-08-11 2025-06-30 13F ANTERO MIDSTREAM COM 03676B102 37,089,082 1,441,826 4.04 702,838 9.54 0.0114
2025-05-09 2025-03-31 13F ANTERO MIDSTREAM COM 03676B102 35,647,256 -220,897 -0.62 641,651 18.55 0.0116
2025-02-11 2024-12-31 13F ANTERO MIDSTREAM COM 03676B102 35,868,153 96,788 0.27 541,250 0.54 0.0094
2024-11-13 2024-09-30 13F ANTERO MIDSTREAM COM 03676B102 35,771,365 157,847 0.44 538,359 2.56 0.0096
2024-08-13 2024-06-30 13F ANTERO MIDSTREAM COM 03676B102 35,613,518 166,599 0.47 524,943 5.33 0.0101
2024-05-10 2024-03-31 13F ANTERO MIDSTREAM COM 03676B102 35,446,919 -98,918 -0.28 498,384 11.90 0.0099
2024-03-11 2023-12-31 13F/A-1 ANTERO MIDSTREAM COM 03676B102 35,545,837 193,263 0.55 445,389 5.16 0.0097
2024-02-14 2023-12-31 13F ANTERO MIDSTREAM COM 03676B102 35,545,837 193,263 445,389 0.0085
2023-12-18 2023-09-30 13F/A-1 ANTERO MIDSTREAM COM 03676B102 35,352,574 -85,673 -0.24 423,524 3.03 0.0104
2023-11-14 2023-09-30 13F ANTERO MIDSTREAM COM 03676B102 35,352,574 -85,673 423,524 0.0019
2023-08-14 2023-06-30 13F ANTERO MIDSTREAM COM 03676B102 35,438,247 2,052,372 6.15 411,084 17.38 0.0097
2023-07-14 2023-03-31 13F/A-1 ANTERO MIDSTREAM COM 03676B102 33,385,875 472,915 1.44 350,218 -1.38 0.0089
2023-05-15 2023-03-31 13F ANTERO MIDSTREAM COM 03676B102 33,385,875 472,915 350,218 0.0089
2023-02-10 2022-12-31 13F ANTERO MIDSTREAM COM 03676B102 32,912,960 639,106 1.98 355,131 19.87 0.0097
2022-11-14 2022-09-30 13F ANTERO MIDSTREAM COM 03676B102 32,273,854 481,124 1.51 296,274 2.97 0.0087
2022-08-12 2022-06-30 13F ANTERO MIDSTREAM COM 03676B102 31,792,730 477,202 1.52 287,725 -15.47 0.0081
2022-05-13 2022-03-31 13F ANTERO MIDSTREAM COM 03676B102 31,315,528 265,763 0.86 340,399 13.25 0.0081
2022-02-14 2021-12-31 13F ANTERO MIDSTREAM COM 03676B102 31,049,765 -105,423 -0.34 300,562 -7.42 0.0068
2021-11-12 2021-09-30 13F ANTERO MIDSTREAM COM 03676B102 31,155,188 -29,569 -0.09 324,636 0.19 0.0081
2021-08-13 2021-06-30 13F ANTERO MIDSTREAM COM 03676B102 31,184,757 909,505 3.00 324,010 18.52 0.0081
2021-05-14 2021-03-31 13F ANTERO MIDSTREAM COM 03676B102 30,275,252 1,225,503 4.22 273,385 22.06 0.0074
2021-02-12 2020-12-31 13F ANTERO MIDSTREAM COM 03676B102 29,049,749 25,336 0.09 223,973 43.70 0.0065
2020-11-16 2020-09-30 13F ANTERO MIDSTREAM COM 03676B102 29,024,413 -781,512 -2.62 155,862 2.53 0.0052
2020-08-14 2020-06-30 13F ANTERO MIDSTREAM COM 03676B102 29,805,925 2,920,461 10.86 152,011 169.24 0.0054
2020-05-15 2020-03-31 13F ANTERO MIDSTREAM COM 03676B102 26,885,464 974,996 3.76 56,459 -71.29 0.0024
2020-02-14 2019-12-31 13F ANTERO MIDSTREAM COM 03676B102 25,910,468 2,821,450 12.22 196,660 15.10 0.0067
2019-11-14 2019-09-30 13F ANTERO MIDSTREAM COM 03676B102 23,089,018 -233,444 -1.00 170,859 -36.07 0.0063
2019-08-14 2019-06-30 13F ANTERO MIDSTREAM COM 03676B102 23,322,462 22,527,464 2,833.65 267,276 2,339.76 0.0101
2019-05-15 2019-03-31 13F ANTERO MIDSTREAM COM 03676B102 794,998 541,274 213.33 10,955 286.15 0.0004
2019-02-14 2018-12-31 13F ANTERO MIDSTREAM GP COM SHS REPSTG 03675Y103 253,724 -951 -0.37 2,837 -34.16 0.0001
2018-12-13 2018-09-30 13F/A-2 ANTERO MIDSTREAM GP COM SHS REPSTG 03675Y103 254,675 3,665 1.46 4,309 -8.98 0.0002
2018-11-23 2018-09-30 13F/A-1 ANTERO MIDSTREAM GP COM SHS REPSTG 03675Y103 254,675 0 4,309 0.0002
2018-11-14 2018-09-30 13F ANTERO MIDSTREAM GP COM SHS REPSTG 03675Y103 254,675 3,665 4,309
2018-08-14 2018-06-30 13F ANTERO MIDSTREAM GP COM SHS REPSTG 03675Y103 251,010 1,611 0.65 4,734 18.74 0.0002
2018-05-15 2018-03-31 13F ANTERO MIDSTREAM GP COM SHS REPSTG 03675Y103 249,399 223,557 865.09 3,987 683.30 0.0002
2018-02-14 2017-12-31 13F ANTERO MIDSTREAM GP COM SHS REPSTG 03675Y103 25,842 25,842 509 0.0000
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.