AM · Antero Midstream Corp · Holdings
Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.
Institutional Ownership Trend
Superinvestors Holding AM
All superinvestors →Holder Concentration
Across 540 13F filersWho Holds AM
Last 8 quarters through Sep 30, 2026 (filing window open)Each kind of 13F filer's share of the common shares 13F filers report. Holder type comes from regulatory records, never the filer's name; style, turnover and horizon are measured from each filer's own 13F book. The quarter selector does not change this card.
Jun 30, 2026, the newest closed quarter: 535 filers, like-for-like change +0.9%; actively managed books +0.7%; index-like books +1.2%.
| Holder type | Share | Filers | Change |
|---|---|---|---|
| Registered adviser | 42.6% | 303 | +1.6% |
| Exempt adviser | 1.3% | 6 | +38.2% |
| Adviser | 10.3% | 13 | -2.5% |
| Bank | 10.6% | 27 | -5.2% |
| Insurer | 0.4% | 4 | -63.2% |
| Broker-dealer | 0.2% | 1 | -1.4% |
| Benefit plan | 0.3% | 7 | -7.1% |
| Non-US | 2.9% | 9 | -4.3% |
| Holding company | 20.5% | 11 | +5.7% |
| Unknown | 10.9% | 154 | +4.0% |
| Style | Share | Filers | Change |
|---|---|---|---|
| Index-like | 38.1% | 45 | +1.2% |
| Systematic-like | 2.4% | 20 | +25.4% |
| Concentrated | 8.6% | 123 | -10.3% |
| Diversified active | 50.8% | 346 | +1.8% |
| Unknown | 0.0% | 1 | new |
| Not measured | 0.0% | 0 | — |
| Turnover | Share | Filers | Change |
|---|---|---|---|
| Low turnover | 69.3% | 336 | -1.6% |
| Medium turnover | 12.1% | 110 | +1.5% |
| High turnover | 4.6% | 44 | +62.1% |
| Unknown | 14.1% | 45 | +0.4% |
| Not measured | 0.0% | 0 | — |
| Holding horizon | Share | Filers | Change |
|---|---|---|---|
| Short horizon | 14.7% | 58 | +8.3% |
| Medium horizon | 16.7% | 86 | +5.3% |
| Long horizon | 64.6% | 363 | -1.9% |
| Unknown | 4.1% | 28 | +3.6% |
| Not measured | 0.0% | 0 | — |
| 13F book size | Share | Filers | Change |
|---|---|---|---|
| Under $1B | 2.5% | 148 | +11.1% |
| $1B to $10B | 10.2% | 159 | -0.7% |
| $10B to $100B | 17.0% | 149 | -0.6% |
| $100B or more | 70.2% | 79 | +1.1% |
| Not measured | 0.0% | 0 | — |
| Client base | Share | Filers | Change |
|---|---|---|---|
| Individuals and high net worth | 5.0% | 190 | +2.7% |
| Pooled investment vehicles | 3.1% | 34 | -14.5% |
| Registered funds and BDCs | 25.7% | 29 | +0.6% |
| Pension and profit sharing plans | 0.1% | 3 | +61.5% |
| Insurance companies | 0.3% | 6 | +4.2% |
| Charitable organizations | 0.0% | 1 | -41.7% |
| Governments and sovereign funds | 0.5% | 5 | -15.7% |
| Banks and thrifts | 0.0% | 1 | 0.0% |
| Corporations | 0.0% | 1 | -57.3% |
| Other investment advisers | 0.3% | 8 | -12.7% |
| Other | 0.7% | 5 | -3.2% |
| Diversified | 5.8% | 18 | +5.7% |
| Unknown | 58.5% | 234 | +1.6% |
| Private funds | Share | Filers | Change |
|---|---|---|---|
| Hedge funds | 9.7% | 58 | +23.8% |
| Private equity funds | 1.1% | 16 | +0.1% |
| Venture capital funds | 0.0% | 1 | +1577.6% |
| Real estate funds | 0.8% | 9 | -45.3% |
| Liquidity funds | 0.0% | 1 | -4.9% |
| Securitized asset funds | 0.3% | 2 | -6.8% |
| Other private funds | 8.2% | 20 | -4.5% |
| Mixed private funds | 1.8% | 2 | -3.7% |
| Private funds, type not stated | 0.2% | 6 | +47.4% |
| No private funds | 21.8% | 194 | +1.2% |
| Unknown | 56.1% | 226 | -0.3% |
| Location | Share | Filers | Change |
|---|---|---|---|
| United States | 88.9% | 465 | -0.7% |
| Outside the US | 11.1% | 70 | +18.1% |
The Sep 30, 2026 filing window is still open, so its bar carries the Jun 30, 2026 positions of filers that have not filed yet.
How the mix is measured
Shares are 13F common shares restated to today's split basis; options and principal amounts are left out. The change compares only filers with a 13F in both quarters and keeps each filer in its bucket of the later quarter on both sides; a filer that continues under a new CIK is compared through its successor. Holder type comes from each filer's current regulatory profile; client base and private funds come from the Form ADV roster current at each quarter end (rosters from December 2019, so an earlier quarter reads Unknown). Style, turnover, horizon and book size are measured from each filer's 13F book in the newest measured quarter, and Not measured means none was. Actively managed books are those measured systematic-like, concentrated or diversified active.
Excluded 6 holders with no observed 2026-03-31 13F and 6 holders with no observed 2026-06-30 13F. Compared across CIK changes: JANUS HENDERSON GROUP PLC continues as Jupiter Topco LLC.
Conviction and Crowding
535 13F filers, quarter ended Jun 30, 2026Measured across every 13F filer's common-share book once the quarter's filing window closed. Crowding counts filers with high turnover or that advise private funds on Form ADV.
Managers in the top fifth by current three-year FundScore alpha were net buyers of $0 (0 buying, 0 selling).
Estimated Holder Cost Basis
Quarter ended Jun 30, 2026, on that quarter's share basisEstimated, never filed: each 13F buy is costed at its quarter's average traded price and each sale keeps the average cost, so this is what holders paid on average if they traded evenly through each quarter.
Estimated cost covers 26.3% of the 13F shares; positions already held when a filer's 13F history starts, or bought in a quarter without a trusted average price, have no estimate.
Shared Holders
Companies AM's active holders also own, quarter ended Jun 30, 2026| # | Company | Shared holders |
|---|---|---|
| 1 | HESM Hess Midstream LP | 19 |
| 2 | KNTK Kinetik Holdings Inc. | 19 |
| 3 | WES Western Midstream Partners, LP | 21 |
| 4 | GEL Genesis Energy LP | 10 |
| 5 | GLP Global Partners LP | 9 |
| 6 | CQP Cheniere Energy Partners, L.P. | 11 |
| 7 | MPLX Mplx LP | 26 |
| 8 | PAGP Plains Gp Holdings LP | 15 |
| 9 | APC ARKO Petroleum Corp. | 5 |
| 10 | USAC USA Compression Partners, LP | 9 |
Shareholder Targets
13F filers that own its peers but not AM, quarter ended Jun 30, 2026Found through its holder-overlap peers: HESM, KNTK, WES, GEL, GLP, CQP, MPLX, PAGP, APC, USAC, AR, TRGP, SUN, DTM, SUNC, PAA, OKE, KGS, DKL, WLKP. 2,059 filers in all.
| # | Filer | In peers | Largest peers |
|---|---|---|---|
| 1 | HARRIS ASSOCIATES L P Registered adviser, Index-like | $2,128,369,294 1 held | TRGP |
| 2 | Capital International Investors Adviser, Diversified active | $1,495,721,237 1 held | OKE |
| 3 | Energy Income Partners, LLC Registered adviser, Diversified active | $1,129,203,337 10 held | MPLX, PAGP, OKE |
| 4 | First Eagle Investment Management, LLC Registered adviser, Diversified active | $1,028,946,941 2 held | OKE, TRGP |
| 5 | MASSACHUSETTS FINANCIAL SERVICES CO /MA/ Registered adviser, Diversified active | $918,092,892 5 held | TRGP, PAGP, DTM |
| 6 | Capital Research Global Investors Adviser, Diversified active | $717,895,471 2 held | OKE, DTM |
| 7 | COHEN & STEERS, INC. Adviser, Diversified active | $554,592,681 10 held | TRGP, KNTK, MPLX |
| 8 | BAHL & GAYNOR INC Adviser, Diversified active | $554,369,572 5 held | TRGP, DTM, OKE |
| 9 | Recurrent Investment Advisors LLC Registered adviser, Diversified active | $482,744,150 9 held | TRGP, OKE, SUN |
| 10 | Zimmer Partners, LP Registered adviser, Diversified active | $457,718,201 5 held | KGS, TRGP, KNTK |
Fund Ownership of AM by Fund Type
Registered funds' Form N-PORT reports for the quarter ended Jun 30, 2026Index funds and index ETFs hold 18.46% of shares outstanding.
| Fund type | Of shares outstanding | Shares |
|---|---|---|
| Index funds | 2.49% | 11,799,536 |
| Index ETFs | 15.98% | 75,843,065 |
| Active ETFs | 2.25% | 10,676,446 |
| Active funds | 10.39% | 49,310,780 |
| Unclassified | 1.33% | 6,317,622 |
| All registered funds | 32.43% | 153,947,449 |
How fund types are measured
Each fund series counts once, with its latest Form N-PORT report dated inside the quarter; only long share positions count, restated to today's split basis. The fund type is the series' latest Form N-CEN answer on or before the quarter end (the index-fund box and the exchange-traded flag), never its name. Unclassified funds have no usable N-CEN; unit investment trusts are among them, so index ownership is a floor. Funds sit inside their advisers' 13F reports, so these shares overlap the 13F figures and are never added to them.
| Holder | Value (USD) | % of 13F | Shares | Type | Filed | Open |
|---|---|---|---|---|---|---|
| Mega BlackRock, Inc. Holding company | $869,045,058 | 13.27% | 38,199,783 | Shares | 2026-08-07 | |
| Mega Invesco Ltd. Adviser | $471,993,816 | 7.21% | 20,746,981 | Shares | 2026-08-14 | |
| Mega VANGUARD PORTFOLIO MANAGEMENT LLC Registered adviser | $413,895,209 | 6.32% | 18,193,196 | Shares | 2026-08-13 | |
| Mega VANGUARD CAPITAL MANAGEMENT LLC Registered adviser | $340,312,154 | 5.20% | 14,958,776 | Shares | 2026-08-13 | |
| Mega STATE STREET CORP Bank | $262,956,921 | 4.02% | 11,558,546 | Shares | 2026-09-22 | |
| Mega GEODE CAPITAL MANAGEMENT, LLC Registered adviser | $235,664,224 | 3.60% | 10,358,867 | Shares | 2026-08-12 | |
| Mid TORTOISE CAPITAL ADVISORS, L.L.C. Registered adviser | $231,674,260 | 3.54% | 10,183,484 | Shares | 2026-08-14 | |
| Mega DIMENSIONAL FUND ADVISORS LP Registered adviser | $204,980,205 | 3.13% | 9,010,119 | Shares | 2026-08-11 | |
| Mega NEUBERGER BERMAN GROUP LLC Holding company | $169,142,791 | 2.58% | 7,434,848 | Shares | 2026-10-27 | |
| Mega Bank of New York Mellon Corp Bank | $157,371,186 | 2.40% | 6,917,415 | Shares | 2026-08-06 | |
| Mega MORGAN STANLEY Holding company | $152,476,020 | 2.33% | 6,702,243 | Shares | 2026-08-13 | |
| Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC Registered adviser | $88,901,175 | 1.36% | 3,907,744 | Shares | 2026-08-14 | |
| Mega NORTHERN TRUST CORP Bank | $85,138,073 | 1.30% | 3,742,333 | Shares | 2026-08-13 | |
| Large MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | $83,737,676 | 1.28% | 3,680,777 | Shares | 2026-08-14 | |
| Mega Clearbridge Investments, LLC Registered adviser | $83,699,593 | 1.28% | 3,679,103 | Shares | 2026-08-13 | |
| Mega ALLIANCEBERNSTEIN L.P. Registered adviser | $82,484,606 | 1.26% | 3,625,697 | Shares | 2026-08-14 | |
| Large Boston Trust Walden Corp | $78,515,208 | 1.20% | 3,451,218 | Shares | 2026-07-24 | |
| Mega NORGES BANK Non-US | $77,657,739 | 1.19% | 3,413,527 | Shares | 2026-08-12 | |
| Mega Qube Research & Technologies Ltd Exempt adviser | $72,567,881 | 1.11% | 3,189,797 | Shares | 2026-08-14 | |
| Mid Covalis Capital LLP Registered adviser | $68,966,966 | 1.05% | 3,031,515 | Shares | 2026-08-13 | |
| Mega BNP PARIBAS ARBITRAGE, SA Non-US | $65,106,154 | 0.99% | 2,861,809 | Shares | 2026-08-13 | |
| Large Gotham Asset Management, LLC Registered adviser | $60,159,440 | 0.92% | 2,644,371 | Shares | 2026-08-14 | |
| Large Clark Capital Management Group, Inc. Registered adviser | $59,522,576 | 0.91% | 2,616,377 | Shares | 2026-08-11 | |
| Large Blackstone Inc. Adviser | $59,442,906 | 0.91% | 2,612,875 | Shares | 2026-08-14 | |
| Large WESTWOOD HOLDINGS GROUP INC Adviser | $58,475,690 | 0.89% | 2,570,360 | Shares | 2026-08-14 | |
| Mega GOLDMAN SACHS GROUP INC Holding company | $55,668,203 | 0.85% | 2,446,954 | Shares | 2026-08-14 | |
| Large Orbis Allan Gray Ltd | $55,064,850 | 0.84% | 2,420,433 | Shares | 2026-08-14 | |
| Mid KAYNE ANDERSON CAPITAL ADVISORS LP Registered adviser | $49,882,991 | 0.76% | 2,192,659 | Shares | 2026-08-11 | |
| Mega VANGUARD FIDUCIARY TRUST CO | $47,823,412 | 0.73% | 2,102,128 | Shares | 2026-08-13 | |
| Mega UBS Group AG Bank | $47,589,928 | 0.73% | 2,091,865 | Shares | 2026-08-13 | |
| Large Connor, Clark & Lunn Investment Management Ltd. Registered adviser | $46,006,961 | 0.70% | 2,022,284 | Shares | 2026-08-13 | |
| Large BROOKFIELD Corp /ON/ | $44,032,625 | 0.67% | 1,935,500 | Shares | 2026-08-14 | |
| Mega FMR LLC Holding company | $42,657,910 | 0.65% | 1,875,073 | Shares | 2026-08-13 | |
| Mid Brave Warrior Advisors, LLC Registered adviser | $41,487,605 | 0.63% | 1,823,631 | Shares | 2026-08-14 | |
| Mega FIRST TRUST ADVISORS LP Registered adviser | $41,133,159 | 0.63% | 1,808,051 | Shares | 2026-08-11 | |
| Mid EAGLE GLOBAL ADVISORS LLC Registered adviser | $41,007,853 | 0.63% | 1,802,543 | Shares | 2026-07-30 | |
| Mega AMERICAN CENTURY COMPANIES INC | $40,899,631 | 0.62% | 1,797,786 | Shares | 2026-08-12 | |
| Mega BARCLAYS PLC Bank | $34,712,472 | 0.53% | 1,525,823 | Shares | 2026-08-14 | |
| Mega JPMORGAN CHASE & CO Bank | $34,505,808 | 0.53% | 1,516,739 | Shares | 2026-08-12 | |
| Small RR Advisors, LLC Registered adviser | $34,434,627 | 0.53% | 1,513,610 | Shares | 2026-08-13 | |
| Large Pacer Advisors, Inc. | $28,448,147 | 0.43% | 1,250,468 | Shares | 2026-08-13 | |
| Mega ENVESTNET ASSET MANAGEMENT INC Registered adviser | $27,941,277 | 0.43% | 1,228,188 | Shares | 2026-09-23 | |
| Mega FRANKLIN RESOURCES INC Adviser | $26,747,036 | 0.41% | 1,175,694 | Shares | 2026-08-13 | |
| Mid CHICKASAW CAPITAL MANAGEMENT LLC Registered adviser | $26,242,433 | 0.40% | 1,301,708 | Shares | 2026-10-08 | |
| Large NEOS Investment Management LLC Adviser | $24,673,376 | 0.38% | 1,084,544 | Shares | 2026-08-11 | |
| Mega JANE STREET GROUP, LLC | $23,985,325 | 0.37% | 1,054,300 | Call | 2026-08-14 | |
| Mega JENNISON ASSOCIATES LLC Registered adviser | $23,898,169 | 0.36% | 1,050,469 | Shares | 2026-08-03 | |
| Large ALPS ADVISORS INC Registered adviser | $23,085,881 | 0.35% | 1,014,764 | Shares | 2026-07-29 | |
| Large EXCHANGE TRADED CONCEPTS, LLC Registered adviser | $22,105,673 | 0.34% | 971,678 | Shares | 2026-08-11 | |
| Mid MILLER HOWARD INVESTMENTS INC /NY Registered adviser | $22,073,405 | 0.34% | 1,094,911 | Shares | 2026-10-26 | |
| Mega Amundi Holding company | $21,388,867 | 0.33% | 940,170 | Shares | 2026-08-11 | |
| Mega BANK OF AMERICA CORP /DE/ Bank | $21,089,817 | 0.32% | 927,025 | Shares | 2026-08-14 | |
| Mega RHUMBLINE ADVISERS Registered adviser | $20,876,332 | 0.32% | 917,641 | Shares | 2026-08-12 | |
| Large NEW YORK STATE COMMON RETIREMENT FUND | $20,422,129 | 0.31% | 897,676 | Shares | 2026-07-29 | |
| Large Fiera Capital Corp Non-US | $20,339,204 | 0.31% | 894,031 | Shares | 2026-08-07 | |
| Mega Cetera Investment Advisers Registered adviser | $20,074,076 | 0.31% | 882,377 | Shares | 2026-08-12 | |
| Mega UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC Registered adviser | $18,170,831 | 0.28% | 798,718 | Shares | 2026-08-13 | |
| Mega ROYAL BANK OF CANADA Bank | $18,035,150 | 0.28% | 792,754 | Shares | 2026-08-14 | |
| Mega PRINCIPAL FINANCIAL GROUP INC Insurer | $17,990,563 | 0.27% | 790,794 | Shares | 2026-08-04 | |
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP | $17,640,350 | 0.27% | 775,400 | Call | 2026-08-14 | |
| Large VOLORIDGE INVESTMENT MANAGEMENT, LLC Registered adviser | $17,168,583 | 0.26% | 754,663 | Shares | 2026-08-14 | |
| Mega California Public Employees Retirement System | $16,596,739 | 0.25% | 729,527 | Shares | 2026-08-14 | |
| Large LOS ANGELES CAPITAL MANAGEMENT LLC Registered adviser | $16,581,314 | 0.25% | 728,849 | Shares | 2026-08-13 | |
| Small Columbus Macro, LLC Registered adviser | $16,157,131 | 0.25% | 801,445 | Shares | 2026-10-14 | |
| Large Freestone Grove Partners LP Registered adviser | $15,895,334 | 0.24% | 698,696 | Shares | 2026-08-14 | |
| Large Thrivent Financial for Lutherans Registered adviser | $15,337,026 | 0.23% | 674,155 | Shares | 2026-08-14 | |
| Mega Swiss National Bank | $15,117,375 | 0.23% | 664,500 | Shares | 2026-08-11 | |
| Mid Edgestream Partners, L.P. | $15,023,258 | 0.23% | 660,363 | Shares | 2026-08-11 | |
| Mega D. E. Shaw & Co., Inc. | $14,671,247 | 0.22% | 644,890 | Shares | 2026-08-14 | |
| Mega CITADEL ADVISORS LLC Registered adviser | $14,375,725 | 0.22% | 631,900 | Call | 2026-09-02 | |
| Mega AMERIPRISE FINANCIAL INC Adviser | $13,249,166 | 0.20% | 582,381 | Shares | 2026-08-14 | |
| Mega WELLINGTON MANAGEMENT GROUP LLP Holding company | $12,993,797 | 0.20% | 571,156 | Shares | 2026-08-14 | |
| Mega LPL Financial LLC Broker-dealer | $12,698,572 | 0.19% | 558,179 | Shares | 2026-08-07 | |
| Mega Nuveen, LLC | $11,163,560 | 0.17% | 490,706 | Shares | 2026-08-11 | |
| Mega RAYMOND JAMES FINANCIAL INC | $11,157,805 | 0.17% | 490,453 | Shares | 2026-08-14 | |
| Mega Legal & General Group Plc | $11,005,357 | 0.17% | 483,752 | Shares | 2026-08-14 | |
| Small Abacus FCF Advisors LLC | $10,788,141 | 0.16% | 474,204 | Shares | 2026-08-10 | |
| Small SIR Capital Management, L.P. | $10,637,854 | 0.16% | 467,598 | Shares | 2026-08-14 | |
| Small SHAH CAPITAL MANAGEMENT Registered adviser | $10,517,734 | 0.16% | 521,713 | Shares | 2026-10-09 | |
| Large Walleye Capital LLC Registered adviser | $10,455,854 | 0.16% | 459,598 | Shares | 2026-08-03 | |
| Large CANADA LIFE ASSURANCE Co | $10,448,119 | 0.16% | 459,258 | Shares | 2026-08-13 | |
| Small Grey Fox Wealth Advisors, LLC Registered adviser | $10,414,199 | 0.16% | 457,767 | Shares | 2026-07-17 | |
| Large Waverly Advisors, LLC Registered adviser | $10,106,824 | 0.15% | 444,256 | Shares | 2026-08-14 | |
| Mega AQR CAPITAL MANAGEMENT LLC Registered adviser | $9,565,304 | 0.15% | 420,453 | Shares | 2026-08-14 | |
| Mega SG Americas Securities, LLC Non-US | $9,475,124 | 0.14% | 416,489 | Shares | 2026-08-07 | |
| Large PRUDENTIAL FINANCIAL INC Insurer | $9,123,387 | 0.14% | 401,028 | Shares | 2026-08-12 | |
| Large Artisan Partners Limited Partnership Registered adviser | $8,986,432 | 0.14% | 395,008 | Shares | 2026-08-13 | |
| Mid CAXTON ASSOCIATES LLP Registered adviser | $8,985,226 | 0.14% | 394,955 | Shares | 2026-08-14 | |
| Mid Susquehanna Portfolio Strategies, LLC | $8,832,642 | 0.13% | 388,248 | Shares | 2026-08-14 | |
| Mid Ruffer LLP Registered adviser | $8,736,227 | 0.13% | 384,010 | Shares | 2026-07-30 | |
| Mega CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM Benefit plan | $8,714,683 | 0.13% | 383,063 | Shares | 2026-08-24 | |
| Large Treasurer of the State of North Carolina | $8,597,111 | 0.13% | 377,895 | Shares | 2026-08-14 | |
| Mega WELLS FARGO & COMPANY/MN Bank | $8,218,208 | 0.13% | 361,240 | Shares | 2026-08-14 | |
| Mega VOYA INVESTMENT MANAGEMENT LLC Registered adviser | $7,865,789 | 0.12% | 345,749 | Shares | 2026-08-12 | |
| Large Retirement Systems of Alabama | $7,823,338 | 0.12% | 343,883 | Shares | 2026-07-28 | |
| Mid CUSHING ASSET MANAGEMENT, LP dba NXG INVESTMENT MANAGEMENT Registered adviser | $7,547,904 | 0.12% | 374,400 | Shares | 2026-10-26 | |
| Mid Maryland State Retirement & Pension System | $7,499,560 | 0.11% | 329,651 | Shares | 2026-07-30 | |
| Mega PRICE T ROWE ASSOCIATES INC /MD/ Registered adviser | $7,243,873 | 0.11% | 318,412 | Shares | 2026-08-14 | |
| Large CIBC Bancorp USA Inc. | $6,547,040 | 0.10% | 287,782 | Shares | 2026-08-13 | |
| Mid HENNESSY ADVISORS INC Registered adviser | $6,527,202 | 0.10% | 286,910 | Shares | 2026-07-16 |
Showing the top 100 of 558 holders. Create a free account to see every holder, past quarters, search, filters and CSV export.