Antero Midstream Corp (NYSE: AM), an SEC filer in Natural Gas Transmission, has a market cap of $10.6B as of 2026-08-28, a trailing P/E of 25.9, a return on equity of 20.2%, a net margin of 34.8% and 3-year sales growth of 8.9%. Institutional ownership, earnings history and filed financials are on the tabs below.
| # | Holder | Shares | Value | % of shares out | Δ QoQ |
|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 37,117,20937.1M | $846M | 7.85% | TRIM -5% |
| 2 | Invesco Ltd. | 21,556,90321.6M | $491M | 4.56% | TRIM -8% |
| 3 | VANGUARD PORTFOLIO MANAGEMENT LLC | 18,299,97318.3M | $417M | 3.87% | NEW† |
| 4 | VANGUARD CAPITAL MANAGEMENT LLC | 14,809,25914.8M | $338M | 3.13% | NEW† |
| 5 | STATE STREET CORP | 11,593,19911.6M | $264M | 2.45% | ADD 2% |
| 6 | TORTOISE CAPITAL ADVISORS, L.L.C. | 11,159,39411.2M | $254M | 2.36% | TRIM -2% |
| 7 | GEODE CAPITAL MANAGEMENT, LLC | 9,897,0049.9M | $226M | 2.09% | TRIM -5% |
| 8 | Bank of New York Mellon Corp | 9,129,2889.1M | $208M | 1.93% | ADD 11% |
| 9 | DIMENSIONAL FUND ADVISORS LP | 9,016,8169.0M | $206M | 1.91% | TRIM -2% |
| 10 | NEUBERGER BERMAN GROUP LLC | 7,272,6267.3M | $166M | 1.54% | TRIM -2% |
† NEW this big is usually a rename.
Ranked by each filer’s own reported value, not shares.
1 holder — The filer reported no value for this line, so it carries no dollar figure and is left out of the percentage and value columns.
| Biggest buyers | Δ shares | Δ value | |
|---|---|---|---|
| VANGUARD PORTFOLIO MANAGEMENT LLC | +18,299,973 | — | OPEN |
| VANGUARD CAPITAL MANAGEMENT LLC | +14,809,259 | — | OPEN |
| ALLIANCEBERNSTEIN L.P. | +3,331,462 | — | ADD |
| PRUDENTIAL FINANCIAL INC | +2,588,087 | — | ADD |
| VANGUARD FIDUCIARY TRUST CO | +2,057,950 | — | OPEN |
| Biggest sellers | Δ shares | Δ value | |
|---|---|---|---|
| VANGUARD GROUP INC | −36,075,910 | — | CLOSE |
| NORGES BANK | −3,766,025 | — | CLOSE |
| BlackRock, Inc. | −2,073,375 | — | TRIM |
| Invesco Ltd. | −1,887,123 | — | TRIM |
| SIR Capital Management, L.P. | −1,772,534 | — | CLOSE |
Prior quarter split-rebased · 13Fs are long, US-listed only.
| Holder | 2024-Q4 | 2025-Q1 | 2025-Q2 | 2025-Q3 | 2025-Q4 | 2026-Q1 | Latest value |
|---|---|---|---|---|---|---|---|
| BlackRock, Inc. | 40.2M | 38.6M | 38.0M | 38.1M | 39.2M | 37.1M | $846M |
| Invesco Ltd. | 30.0M | 30.6M | 25.3M | 22.7M | 23.4M | 21.6M | $491M |
| VANGUARD PORTFOLIO MANAGEMENT LLC | — | — | — | — | — | 18.3M | $417M |
| VANGUARD CAPITAL MANAGEMENT LLC | — | — | — | — | — | 14.8M | $338M |
| STATE STREET CORP | 11.5M | 11.6M | 11.4M | 11.1M | 11.3M | 11.6M | $264M |
| TORTOISE CAPITAL ADVISORS, L.L.C. | 7.1M | 9.3M | 10.9M | 11.4M | 11.4M | 11.2M | $254M |
| GEODE CAPITAL MANAGEMENT, LLC | 6.1M | 6.2M | 6.1M | 9.3M | 10.5M | 9.9M | $226M |
| Bank of New York Mellon Corp | 5.7M | 6.0M | 6.4M | 7.8M | 8.2M | 9.1M | $208M |
| DIMENSIONAL FUND ADVISORS LP | 9.1M | 9.1M | 9.2M | 9.2M | 9.2M | 9.0M | $206M |
| NEUBERGER BERMAN GROUP LLC | 7.3M | 7.3M | 7.4M | 7.4M | 7.4M | 7.3M | $166M |
Green = added, red = trimmed, grey = held; a dash is a quarter with no 13F on file — a gap, not an exit.
Breaks = no 13F that quarter.
Short interest has its own tab now — open SI →
SEC Form 13F · ~10,250 filers, 10y · long-only, US-listed, filed ≤45d after quarter-end.
SEC Schedule 13D/G XML · group aggregate.
