Antero Midstream Partners LP
Ownership
Ownership Structure
Who owns Antero Midstream Partners LP (AM)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 69.5% of the shares are freely tradable; institutional investors hold 60.6%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 7.82 | 37,117,209 | -5.3 | 03/31/2026 |
| Amvescap Plc. | 4.54 | 21,556,903 | -8.0 | 03/31/2026 |
| Vanguard Portfolio Management, LLC | 3.86 | 18,299,973 | +0.0 | 03/31/2026 |
| Vanguard Capital Management, LLC | 3.12 | 14,809,259 | +0.0 | 03/31/2026 |
| State Street Corp | 2.44 | 11,593,199 | +2.3 | 03/31/2026 |
| Tortoise Midstream Energy Fund, Inc. | 2.15 | 10,183,484 | -8.7 | 06/30/2026 |
| Geode Capital Management, LLC | 2.09 | 9,897,004 | -5.5 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Invesco SteelPath MLP Income Y | 2.51 | 11,907,509 | -3.6 | 06/30/2026 |
| iShares Core S&P Mid-Cap ETF | 2.45 | 11,644,297 | +0.0 | 08/31/2026 |
| Vanguard MStar Total Stk Mkt Idx Invest | 2.23 | 10,578,740 | +0.3 | 07/31/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| Keenan W Howard JR | Director | 157,691 | 3,343,049 $ | Jul 10, 2026 | direct |
| Keyte David H | Director | 117,903 | 2,499,544 $ | Jul 10, 2026 | direct |
| Mollenkopf John C | Director | 106,566 | 2,259,199 $ | Jul 10, 2026 | direct |
| Pearce Sheri | See Remarks | 83,900 | 1,778,680 $ | Aug 4, 2026 | direct |
| Mcardle Janine J | Director | 82,424 | 1,747,389 $ | Jul 10, 2026 | direct |
| Dea Peter A | Director | 68,808 | 1,458,730 $ | Jul 10, 2026 | direct |
| Klimley Brooks J | Director | 68,204 | 1,445,925 $ | Aug 6, 2026 | direct |
| Chisholm Nancy | Director | 34,208 | 725,210 $ | Jul 10, 2026 | direct |
| Munoz Jeffrey S. | Director | 13,404 | 284,165 $ | Jul 10, 2026 | direct |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Aug 6, 2026 | Klimley Brooks J | Director | Sell | 5,000 | 21.27 | 106,350 |
| Aug 4, 2026 | Pearce Sheri | See Remarks | Sell | 16,000 | 22.01 | 352,160 |
| Jul 10, 2026 | Keenan W Howard JR | Director | Other | 1,907 | 0.00 | – |
| Jul 10, 2026 | Dea Peter A | Director | Other | 1,907 | 0.00 | – |
| Jul 10, 2026 | Chisholm Nancy | Director | Other | 1,907 | 0.00 | – |
| Jul 10, 2026 | Mollenkopf John C | Director | Other | 1,907 | 0.00 | – |
| Jul 10, 2026 | Munoz Jeffrey S. | Director | Other | 1,907 | 0.00 | – |
| Jul 10, 2026 | Mcardle Janine J | Director | Other | 1,907 | 0.00 | – |
| Jul 10, 2026 | Keyte David H | Director | Other | 3,225 | 0.00 | – |
| Jul 10, 2026 | Klimley Brooks J | Director | Other | 1,907 | 0.00 | – |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: September 18, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.