Antero Midstream Corporation
US ˙ NYSE ˙ US03676B1026

SecurityAM / Antero Midstream Corporation
InstitutionCIBC Private Wealth Group, LLC
Latest Disclosed Ownership88,198 shares
Latest Disclosed Value $ 1,569,042
CIBC Private Wealth Group, LLC reports 9.33% increase in ownership of AM / Antero Midstream Corporation

On February 12, 2026 - CIBC Private Wealth Group, LLC filed a 13F-HR form disclosing ownership of 88,198 shares of Antero Midstream Corporation (US:AM) valued at $1,569,042 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 24, 2025 disclosing 80,671 shares of Antero Midstream Corporation. This represents a change in shares of 9.33% during the quarter. The current value of the position is $1,898,021 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)
2026-02-12 2025-12-31 13F ANTERO MIDSTREAM COM 03676B102 88,198 7,527 9.33 1,569 0.06 0.0027
2025-11-24 2025-09-30 13F ANTERO MIDSTREAM COM 03676B102 80,671 -232,961 -74.28 1,568 -73.62 0.0027
2025-08-12 2025-06-30 13F ANTERO MIDSTREAM COM 03676B102 313,632 -89,398 -22.18 5,943 -7.55 0.0106
2025-05-14 2025-03-31 13F ANTERO MIDSTREAM COM 03676B102 403,030 12,319 3.15 6,428 5.20 0.0136
2025-02-12 2024-12-31 13F Antero Midstream COM 03676B102 390,711 0 0.00 6,111 3.91 0.0111
2024-11-13 2024-09-30 13F Antero Midstream COM 03676B102 390,711 -1,647 -0.42 5,880 2.51 0.0105
2024-08-09 2024-06-30 13F Antero Midstream COM 03676B102 392,358 390,865 26,179.84 5,736 27,214.29 0.0108
2024-05-10 2024-03-31 13F Antero Midstream COM 03676B102 1,493 1,493 21 0.0000
2022-11-15 2022-09-30 13F ANTERO MIDSTREAM COM 03676B102 0 -15,887 -100.00 0 -100.00
2022-08-03 2022-06-30 13F ANTERO MIDSTREAM COM 03676B102 15,887 0 0.00 144 -16.76 0.0004
2022-05-16 2022-03-31 13F ANTERO MIDSTREAM COM 03676B102 15,887 0 0.00 173 12.34 0.0004
2022-04-04 2021-12-31 13F/A-1 ANTERO MIDSTREAM COM 03676B102 15,887 0 0.00 154 -7.23 0.0003
2022-02-08 2021-12-31 13F ANTERO MIDSTREAM COM 03676B102 15,887 0 154 0.0002
2021-11-12 2021-09-30 13F ANTERO MIDSTREAM COM 03676B102 15,887 -75,606 -82.64 166 -82.53 0.0004
2021-08-16 2021-06-30 13F ANTERO MIDSTREAM COM 03676B102 91,493 5,289 6.14 950 22.11 0.0022
2021-05-12 2021-03-31 13F ANTERO MIDSTREAM COM 03676B102 86,204 17,546 25.56 778 46.79 0.0020
2021-02-12 2020-12-31 13F ANTERO MIDSTREAM COM 03676B102 68,658 -6,405 -8.53 530 31.51 0.0014
2020-11-03 2020-09-30 13F/A-1 ANTERO MIDSTREAM COM 03676B102 75,063 6,405 9.33 403 15.14 0.0012
2020-08-13 2020-06-30 13F ANTERO MIDSTREAM CORP COM Com 03676B102 68,658 68,658 350 0.0017
2020-05-15 2020-03-31 13F ANTERO MIDSTREAM COM 03676B102 0 -119,716 -100.00 0 -100.00
2020-01-30 2019-12-31 13F ANTERO MIDSTREAM COM 03676B102 119,716 -512,661 -81.07 908 -80.59 0.0030
2019-10-16 2019-09-30 13F ANTERO MIDSTREAM COM 03676B102 632,377 -5,317,866 -89.37 4,679 -93.14 0.0165
2019-07-31 2019-06-30 13F ANTERO MIDSTREAM COM 03676B102 5,950,243 2,325,851 64.17 68,191 36.53 0.2393
2019-05-10 2019-03-31 13F ANTERO MIDSTREAM COM 03676B102 3,624,392 921,736 34.10 49,944 -13.61 0.1927
2019-02-05 2018-12-31 13F ANTERO MIDSTREAM PARTNERS LP UNT LTD PARTN 03673L103 2,702,656 626,056 30.15 57,810 -2.86 0.2578
2019-02-05 2018-12-31 13F ANTERO MIDSTREAM GP COM SHS REPSTG 03675Y103 30,296 -3,798,530 339 0.0015
2018-11-14 2018-09-30 13F ANTERO MIDSTREAM PARTNERS UNT LTD PARTN 03673L103 2,076,600 430,094 26.12 59,515 22.45 0.2256
2018-11-14 2018-09-30 13F ANTERO MIDSTREAM GP COM SHS REPSTG 03675Y103 3,828,826 223,850 64,784 0.2456
2018-08-02 2018-06-30 13F ANTERO MIDSTREAM PARTNERS LP UNT LTD PARTN 03673L103 1,646,506 -189,790 -10.34 48,605 2.24 0.1982
2018-08-02 2018-06-30 13F ANTERO MIDSTREAM GP LP COM SHS REPSTG 03675Y103 3,604,976 -620,274 67,990 0.2772
2018-05-17 2018-03-31 13F ANTERO MIDSTREAM PARTNERS LP UNT LTD PARTN 03673L103 1,836,296 280,673 18.04 47,542 5.24 0.2066
2018-05-17 2018-03-31 13F ANTERO MIDSTREAM GP LP COM SHS REPSTG 03675Y103 4,225,250 2,526,905 67,562 0.2936
2018-02-12 2017-12-31 13F ANTERO MIDSTREAM PARTNERS UNT LTD PARTN 03673L103 1,555,623 35,555 2.34 45,176 -5.74 0.1916
2018-02-12 2017-12-31 13F ANTERO MIDSTREAM GP LP COM SHS REPSTG 03675Y103 1,698,345 372,971 33,491 0.1420
2017-12-21 2017-09-30 13F/A-1 ANTERO MIDSTREAM PARTNERS LP UNT LP UNT LTD PARTN 03673L103 1,520,068 -138,022 -8.32 47,926 -12.89 0.2184
2017-12-21 2017-09-30 13F/A-1 ANTERO MIDSTREAM GP LP COM SHS SHS REPSTG 03675Y103 1,325,374 69,215 27,131 0.1237
2017-11-14 2017-09-30 13F ANTERO MIDSTREAM PARTNERS LP UNT UNT LTD PARTN 03673L103 1,520,068 -138,022 47,926
2017-11-14 2017-09-30 13F ANTERO MIDSTREAM GP LP COM SHS COM SHS REPSTG 03675Y103 1,325,374 69,215 27,131
2017-08-09 2017-06-30 13F ANTERO MIDSTREAM PARTNERS LP UNT Com 03673L103 1,658,090 76,412 4.83 55,015 4.89 0.3454
2017-08-09 2017-06-30 13F ANTERO MIDSTREAM GP LP COM SHS Com 03675Y103 1,256,159 -325,519 27,611 0.1734
2017-05-10 2017-03-31 13F ANTERO MIDSTREAM PARTNERS LP UNT Com 03673L103 1,581,678 400,139 33.87 52,448 43.75 0.3295
2017-02-13 2016-12-31 13F ANTERO MIDSTREAM PARTNERS LP UNT Com 03673L103 1,181,539 212,771 21.96 36,486 41.06 0.2412
2016-11-09 2016-09-30 13F ANTERO MIDSTREAM PARTNERS LP UNT Com 03673L103 968,768 -892 -0.09 25,866 -4.29 0.1794
2016-08-11 2016-06-30 13F ANTERO MIDSTREAM PARTNERS LP UNT Com 03673L103 969,660 -20,293 -2.05 27,026 23.47 0.1973
2016-05-11 2016-03-31 13F ANTERO MIDSTREAM PARTNERS LP UNT Com 03673L103 989,953 -663,272 -40.12 21,888 -41.98 0.1691
2016-02-10 2015-12-31 13F ANTERO MIDSTREAM PARTNERS LP UNT Com 03673L103 1,653,225 -598,290 -26.57 37,726 -6.18 0.2952
2015-11-12 2015-09-30 13F ANTERO MIDSTREAM PARTNERS LP UNT Com 03673L103 2,251,515 149,477 7.11 40,213 -33.20 0.3309
2015-08-13 2015-06-30 13F ANTERO MIDSTREAM PARTNERS LP UNT Com 03673L103 2,102,038 -986,587 -31.94 60,202 -19.42 0.4382
2015-05-11 2015-03-31 13F ANTERO MIDSTREAM PARTNERS LP UNT Com 03673L103 3,088,625 263,515 9.33 74,714 -3.83 0.5519
2015-02-12 2014-12-31 13F ANTERO MIDSTREAM PARTNERS LP UNT Com 03673L103 2,825,110 2,825,110 77,690 0.5946
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.