Antero Midstream Corporation
US ˙ NYSE ˙ US03676B1026

SecurityAM / Antero Midstream Corporation
InstitutionSigma Planning Corp
Latest Disclosed Ownership24,130 shares
Latest Disclosed Value $ 550,165
Sigma Planning Corp reports 1.61% decrease in ownership of AM / Antero Midstream Corporation

On May 4, 2026 - Sigma Planning Corp filed a 13F-HR form disclosing ownership of 24,130 shares of Antero Midstream Corporation (US:AM) valued at $550,164 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 30, 2026 disclosing 24,525 shares of Antero Midstream Corporation. This represents a change in shares of -1.61% during the quarter. The current value of the position is $513,245 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)
2026-05-04 2026-03-31 13F ANTERO MIDSTREAM COM 03676B102 24,130 -395 -1.61 550 26.15 0.0153
2026-01-30 2025-12-31 13F ANTERO MIDSTREAM COM 03676B102 24,525 12 0.05 436 -8.40 0.0120
2025-11-10 2025-09-30 13F ANTERO MIDSTREAM COM 03676B102 24,513 56 0.23 477 2.81 0.0135
2025-08-05 2025-06-30 13F ANTERO MIDSTREAM COM 03676B102 24,457 -3,177 -11.50 463 -6.84 0.0139
2025-05-02 2025-03-31 13F ANTERO MIDSTREAM COM 03676B102 27,634 326 1.19 497 20.63 0.0159
2025-02-03 2024-12-31 13F ANTERO MIDSTREAM COM 03676B102 27,308 -3,494 -11.34 412 -11.02 0.0129
2024-11-04 2024-09-30 13F ANTERO MIDSTREAM COM 03676B102 30,802 -11,683 -27.50 464 -26.04 0.0142
2024-08-06 2024-06-30 13F ANTERO MIDSTREAM COM 03676B102 42,485 11 0.03 626 4.86 0.0198
2024-05-02 2024-03-31 13F ANTERO MIDSTREAM COM 03676B102 42,474 24,638 138.14 597 167.71 0.0188
2024-02-01 2023-12-31 13F ANTERO MIDSTREAM COM 03676B102 17,836 -38,736 -68.47 223 -67.06 0.0175
2023-11-06 2023-09-30 13F ANTERO MIDSTREAM COM 03676B102 56,572 -2,067 -3.52 678 -0.44 0.0254
2023-08-02 2023-06-30 13F ANTERO MIDSTREAM COM 03676B102 58,639 13,906 31.09 680 44.99 0.0244
2023-05-08 2023-03-31 13F ANTERO MIDSTREAM COM 03676B102 44,733 -114 -0.25 469 -2.90 0.0156
2023-01-24 2022-12-31 13F ANTERO MIDSTREAM COM 03676B102 44,847 -466 -1.03 484 16.11 0.0173
2022-11-10 2022-09-30 13F ANTERO MIDSTREAM COM 03676B102 45,313 12,230 36.97 416 39.13 0.0159
2022-08-11 2022-06-30 13F ANTERO MIDSTREAM COM 03676B102 33,083 1,760 5.62 299 -12.06 0.0104
2022-04-20 2022-03-31 13F ANTERO MIDSTREAM COM 03676B102 31,323 207 0.67 340 12.96 0.0102
2022-02-02 2021-12-31 13F ANTERO MIDSTREAM CORP COM Stock 03676B102 31,116 -4,910 -13.63 301 -19.73 0.0084
2021-10-28 2021-09-30 13F ANTERO MIDSTREAM COM 03676B102 36,026 2,151 6.35 375 6.53 0.0113
2021-08-13 2021-06-30 13F ANTERO MIDSTREAM CORP COM Stock 03676B102 33,875 180 0.53 352 15.79 0.0105
2021-05-06 2021-03-31 13F ANTERO MIDSTREAM CORP COM Stock 03676B102 33,695 -3,278 -8.87 304 6.67 0.0097
2021-02-09 2020-12-31 13F ANTERO MIDSTREAM COM 03676B102 36,973 -1,395 -3.64 285 38.35 0.0097
2020-11-03 2020-09-30 13F ANTERO MIDSTREAM COM 03676B102 38,368 3,504 10.05 206 15.73 0.0082
2020-07-31 2020-06-30 13F ANTERO MIDSTREAM COM 03676B102 34,864 7,500 27.41 178 212.28 0.0078
2020-05-01 2020-03-31 13F ANTERO MIDSTREAM COM 03676B102 27,364 3,000 12.31 57 -69.19 0.0034
2020-02-03 2019-12-31 13F ANTERO MIDSTREAM COM 03676B102 24,364 3,181 15.02 185 17.83 0.0078
2019-11-01 2019-09-30 13F ANTERO MIDSTREAM COM 03676B102 21,183 21,183 157 0.0075
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.