Antero Midstream Corporation
US ˙ NYSE ˙ US03676B1026

SecurityAM / Antero Midstream Corporation
InstitutionAdvisor OS, LLC
Latest Disclosed Ownership14,437 shares
Latest Disclosed Value $ 329,154
Advisor OS, LLC reports 0.04% increase in ownership of AM / Antero Midstream Corporation

On May 7, 2026 - Advisor OS, LLC filed a 13F-HR form disclosing ownership of 14,437 shares of Antero Midstream Corporation (US:AM) valued at $329,164 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 4, 2026 disclosing 14,431 shares of Antero Midstream Corporation. This represents a change in shares of 0.04% during the quarter. The current value of the position is $307,075 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)
2026-05-07 2026-03-31 13F ANTERO MIDSTREAM COM 03676B102 14,437 6 0.04 329 28.52 0.0093
2026-02-04 2025-12-31 13F ANTERO MIDSTREAM COM 03676B102 14,431 73 0.51 257 -8.24 0.0076
2025-11-12 2025-09-30 13F ANTERO MIDSTREAM COM 03676B102 14,358 -1 -0.01 279 2.57 0.0241
2025-08-14 2025-06-30 13F ANTERO MIDSTREAM COM 03676B102 14,359 61 0.43 272 5.84 0.0268
2025-05-06 2025-03-31 13F ANTERO MIDSTREAM COM 03676B102 14,298 64 0.45 257 20.09 0.0293
2025-02-05 2024-12-31 13F ANTERO MIDSTREAM COM 03676B102 14,234 33 0.23 215 0.47 0.0249
2024-11-04 2024-09-30 13F ANTERO MIDSTREAM COM 03676B102 14,201 -34 -0.24 214 1.91 0.0213
2024-08-05 2024-06-30 13F ANTERO MIDSTREAM COM 03676B102 14,235 -239 -1.65 210 2.96 0.0230
2024-05-09 2024-03-31 13F ANTERO MIDSTREAM COM 03676B102 14,474 41 0.28 204 12.78 0.0234
2024-02-08 2023-12-31 13F ANTERO MIDSTREAM COM 03676B102 14,433 1,177 8.88 181 13.92 0.0235
2023-11-03 2023-09-30 13F ANTERO MIDSTREAM COM 03676B102 13,256 0 0.00 159 3.27 0.0238
2023-08-08 2023-06-30 13F ANTERO MIDSTREAM COM 03676B102 13,256 0 0.00 154 10.07 0.0252
2023-04-25 2023-03-31 13F ANTERO MIDSTREAM COM 03676B102 13,256 0 0.00 139 -2.80 0.0334
2023-02-01 2022-12-31 13F ANTERO MIDSTREAM COM 03676B102 13,256 0 0.00 143 17.21 0.0380
2022-11-04 2022-09-30 13F ANTERO MIDSTREAM COM 03676B102 13,256 0 0.00 122 1.67 0.0368
2022-08-02 2022-06-30 13F ANTERO MIDSTREAM COM 03676B102 13,256 0 0.00 120 -16.67 0.0350
2022-05-11 2022-03-31 13F ANTERO MIDSTREAM COM 03676B102 13,256 0 0.00 144 12.50 0.0417
2022-02-04 2021-12-31 13F ANTERO MIDSTREAM COM 03676B102 13,256 0 0.00 128 -7.25 0.0261
2021-11-15 2021-09-30 13F ANTERO MIDSTREAM COM 03676B102 13,256 0 0.00 138 0.00 0.0300
2021-08-10 2021-06-30 13F ANTERO MIDSTREAM COM 03676B102 13,256 0 0.00 138 15.00 0.0286
2021-05-13 2021-03-31 13F ANTERO MIDSTREAM COM 03676B102 13,256 0 0.00 120 17.65 0.0272
2021-02-10 2020-12-31 13F ANTERO MIDSTREAM COM 03676B102 13,256 13,256 102 0.0274
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.