Antero Midstream Corporation (AM) Ownership
AM ownership summary
as of October 18, 2026- Institutions
- 61.0% of shares outstanding
- Insiders
- 30.63% of shares outstanding
- Shares outstanding
- 474.7M
- Float
- 329.8M shares available to trade
- Short interest
- 3.72% 12.3M shares short
- Days to cover
- 4.89 short interest up 10.9% vs prior month
- Institutions 60.97%
- Insiders 30.63%
- Other investors 8.40%
AM top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | BlackRock Inc | 8.05% | 38.2M | $788.4M | +1.1M (+2.9%) | June 30, 2026 |
| 2 | Amvescap Plc. | 4.37% | 20.7M | $428.2M | −809,922 (−3.8%) | June 30, 2026 |
| 3 | Vanguard Portfolio Management, LLC | 3.83% | 18.2M | $375.5M | −106,777 (−0.6%) | June 30, 2026 |
| 4 | Vanguard Capital Management, LLC | 3.15% | 15.0M | $308.7M | +149,517 (+1.0%) | June 30, 2026 |
| 5 | State Street Corp | 2.44% | 11.6M | $238.6M | −34,653 (−0.3%) | June 30, 2026 |
| 6 | Geode Capital Management, LLC | 2.18% | 10.4M | $213.8M | +461,863 (+4.7%) | June 30, 2026 |
| 7 | Tortoise Midstream Energy Fund, Inc. | 2.15% | 10.2M | $210.2M | −975,910 (−8.7%) | June 30, 2026 |
| 8 | Dimensional Fund Advisors, Inc. | 1.90% | 9.0M | $186.0M | −6,697 (−0.1%) | June 30, 2026 |
| 9 | Neuberger Berman Group LLC | 1.57% | 7.4M | $153.5M | +162,222 (+2.2%) | June 30, 2026 |
| 10 | Bank of New York Mellon Corp | 1.46% | 6.9M | $142.8M | −2.2M (−24.2%) | June 30, 2026 |
| 11 | Morgan Stanley - Brokerage Accounts | 1.41% | 6.7M | $138.3M | +446,717 (+7.1%) | June 30, 2026 |
| 12 | Charles Schwab Investment Management Inc | 0.82% | 3.9M | $80.7M | −31,081 (−0.8%) | June 30, 2026 |
| 13 | Northern Trust Corp | 0.79% | 3.7M | $77.2M | +10,765 (+0.3%) | June 30, 2026 |
| 14 | MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.78% | 3.7M | $76.0M | −221,922 (−5.7%) | June 30, 2026 |
| 15 | ClearBridge Advisors, LLC | 0.78% | 3.7M | $75.9M | −63,140 (−1.7%) | June 30, 2026 |
| 16 | AllianceBernstein L.P. | 0.76% | 3.6M | $74.8M | −198,250 (−5.2%) | June 30, 2026 |
| 17 | BTIM Corp | 0.73% | 3.5M | $71.2M | +19,667 (+0.6%) | June 30, 2026 |
| 18 | NORGES BANK | 0.72% | 3.4M | $70.5M | −352,498 (−9.4%) | June 30, 2026 |
| 19 | Qube Research & Technologies | 0.67% | 3.2M | $65.8M | +564,386 (+21.5%) | June 30, 2026 |
| 20 | Covalis Capital LLP | 0.64% | 3.0M | $62.6M | +2.0M (+207.7%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 9 holders added 4.9M shares and 11 cut 5.0M.
AM top mutual fund and ETF holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Invesco SteelPath MLP Income Y | 2.51% | 11.9M | $245.8M | −450,000 (−3.6%) | June 30, 2026 |
| 2 | iShares Core S&P Mid-Cap ETF | 2.49% | 11.8M | $244.3M | −4,224 (−0.0%) | September 30, 2026 |
| 3 | Vanguard MStar Total Stk Mkt Idx Invest | 2.23% | 10.6M | $218.1M | −11,706 (−0.1%) | August 31, 2026 |
| 4 | Tortoise Energy Infrastructure TR Ins | 1.74% | 8.3M | $170.4M | — | September 30, 2026 |
| 5 | Vanguard Small Cap Index | 1.57% | 7.5M | $154.3M | −177,228 (−2.3%) | September 30, 2026 |
| 6 | Vanguard MStar Small Cap Value Index | 1.03% | 4.9M | $100.5M | +9,701 (+0.2%) | September 30, 2026 |
| 7 | Invesco SteelPath MLP Select 40 Y | 0.83% | 3.9M | $81.0M | +250,000 (+6.8%) | June 30, 2026 |
| 8 | Global X MLP & Energy Infrastructure ETF | 0.74% | 3.5M | $72.9M | −2,908 (−0.1%) | September 30, 2026 |
| 9 | ClearBridge Energy Midstream Opportunity | 0.70% | 3.3M | $68.2M | — | August 31, 2026 |
| 10 | State Street® SPDR® S&P MIDCAP 400® ETF | 0.52% | 2.5M | $50.7M | +25,282 (+1.0%) | September 30, 2026 |
| 11 | DFA US Small Cap I | 0.44% | 2.1M | $42.8M | — | August 31, 2026 |
| 12 | Invesco S&P MidCap Quality ETF | 0.42% | 2.0M | $41.5M | +2,100 (+0.1%) | September 30, 2026 |
| 13 | Center Coast Brookfield Midstream Foc I | 0.41% | 1.9M | $39.9M | — | June 30, 2026 |
| 14 | iShares S&P Mid-Cap 400 Growth ETF | 0.40% | 1.9M | $39.6M | −2,046 (−0.1%) | September 30, 2026 |
| 15 | Vanguard Energy ETF | 0.40% | 1.9M | $39.1M | −8,573 (−0.5%) | September 30, 2026 |
| 16 | State Street SPDR Port S&P 400 Md CpETF | 0.37% | 1.8M | $36.3M | −2,472 (−0.1%) | September 30, 2026 |
| 17 | Schwab US Small-Cap ETF™ | 0.37% | 1.7M | $36.1M | +1,179 (+0.1%) | September 30, 2026 |
| 18 | WisdomTree US MidCap Dividend ETF | 0.35% | 1.7M | $34.2M | — | September 30, 2026 |
| 19 | Fidelity Extended Market Index | 0.34% | 1.6M | $33.3M | −17,954 (−1.1%) | August 31, 2026 |
| 20 | Orbis SICAV Global Bal Instl Inv | 0.32% | 1.5M | $31.2M | +533,421 (+54.5%) | March 31, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
AM insider transactions
latest 6| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2026-03-12 | Brooks J Klimley | Sell | $23.16 | 5,000 | $115,800 |
| 2026-03-10 | Sheri Pearce | Sell | $22.76 | 14,000 | $318,640 |
| 2026-03-09 | Yvette K Schultz | Sell | $22.81 | 25,000 | $570,250 |
| 2025-12-16 | Brooks J Klimley | Sell | $17.59 | 5,000 | $87,950 |
| 2025-08-20 | Sheri Pearce | Sell | $17.51 | 39,155 | $685,604 |
| 2025-05-28 | Brooks J Klimley | Sell | $18.88 | 5,000 | $94,400 |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
AM shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns AM
Institutional investors own 61.0% of Antero Midstream's shares and insiders 30.63%. The largest holder is BlackRock Inc with 8.05% of the shares (38.2M), as of June 30, 2026. Among the top 20 institutions, 9 added shares and 11 reduced their stake in the latest filings. Short interest is 3.72% of the float, or 4.89 days of average trading volume. The share count fell 74.1% since 2014.
Related: AM analyst forecast, AM key metrics, AM dividend history. See the AM stock overview for the latest quote and news.
AM ownership FAQ
Who owns the most Antero Midstream stock?
The largest shareholders of Antero Midstream are BlackRock Inc (8.05%), Amvescap Plc. (4.37%), Vanguard Portfolio Management, LLC (3.83%), Vanguard Capital Management, LLC (3.15%), State Street Corp (2.44%).
What percentage of Antero Midstream is owned by institutions?
Institutions hold 61.0% of Antero Midstream's shares outstanding; insiders hold 30.63%.
Which funds own Antero Midstream?
The largest fund holders of Antero Midstream are Invesco SteelPath MLP Income Y (2.51%), iShares Core S&P Mid-Cap ETF (2.49%), Vanguard MStar Total Stk Mkt Idx Invest (2.23%), Tortoise Energy Infrastructure TR Ins (1.74%), Vanguard Small Cap Index (1.57%).
What is Antero Midstream's short interest?
12.3M shares of Antero Midstream were sold short, 3.72% of the float; at the average daily volume it would take 4.89 days to cover.
Are insiders buying or selling Antero Midstream?
Of the latest 6 reported insider transactions in Antero Midstream (since May 28, 2025), 0 were purchases and 6 were sales.
How many shares of Antero Midstream are outstanding?
Antero Midstream has 474.7M shares outstanding, of which 329.8M are in the public float.