Antero Midstream Corporation
Antero Midstream Corporation (AM) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · AM · as of Sep 30, 2025
Ownership Breakdown
491
Institutional Holders
▼ 11 vs Q2
$5.25B
Total Inst. Value
▲ $14.36M vs Q2
474.98M
Shares Outstanding
freeFloat 69.24%
269.93M
13F Shares Held
▼ 6.22M vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
AM largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
BLACKROCK, INC. natural gas transmission | 38.11M | 7.95% | 7.95% | $740.85B | Nov 12, 2025 | ▲ 139.1K |
VANGUARD GROUP INC natural gas transmission | 37.21M | 7.77% | 7.77% | $723.42B | Nov 7, 2025 | ▲ 124.1K |
INVESCO LTD. natural gas transmission | 22.67M | 4.73% | 4.73% | $440.65B | Nov 13, 2025 | ▼ 2.66M |
TORTOISE CAPITAL ADVISORS, L.L.C. natural gas transmission | 11.38M | 2.37% | 2.37% | $221.16B | Nov 13, 2025 | ▲ 454.9K |
STATE STREET CORP natural gas transmission | 11.15M | 2.33% | 2.33% | $216.74B | Nov 14, 2025 | ▼ 276.8K |
GEODE CAPITAL MANAGEMENT, LLC natural gas transmission | 9.31M | 1.94% | 1.94% | $181.02B | Nov 12, 2025 | ▲ 3.19M |
DIMENSIONAL FUND ADVISORS LP natural gas transmission | 9.22M | 1.93% | 1.93% | $179.32B | Nov 12, 2025 | ▲ 71.6K |
BANK OF NEW YORK MELLON CORP natural gas transmission | 7.85M | 1.64% | 1.64% | $152.57B | Nov 3, 2025 | ▲ 1.43M |
NEUBERGER BERMAN GROUP LLC natural gas transmission | 7.38M | 1.54% | 1.54% | $143.46B | Nov 12, 2025 | ▼ 21.5K |
MORGAN STANLEY natural gas transmission | 6.40M | 1.34% | 1.34% | $124.35B | May 27, 2026 | ▼ 615.5K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
24
Increased
+12.52M shares2
New Positions
first time holders23
Decreased
−8.56M shares0
Sold Out
fully exitedNet shares change (top 50)
+3.96M
+12.52M / −8.56M
Net new holders
+3
2 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
AM insider trading · insider activity
Source: SEC Form 4
Insiders have been primarily selling shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
8
Buy transactions
2
Sell transactions
4.00
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
Schultz Yvette K See Remarks | May 4, 2026 | Sale | 69,269 | $21.90 | $1.52M | 580.6K | Form 4 ↗ |
Kennedy Michael N. See Remarks | May 4, 2026 | Sale | 100,000 | $21.92 | $2.19M | 1.50M | Form 4 ↗ |
Keenan W Howard JR director | Apr 10, 2026 | Award | 1,617 | — | — | 155.8K | Form 4 ↗ |
DEA PETER A director | Apr 10, 2026 | Award | 1,617 | — | — | 66.9K | Form 4 ↗ |
Chisholm Nancy director | Apr 10, 2026 | Award | 1,617 | — | — | 32.3K | Form 4 ↗ |
Munoz Jeffrey S. director | Apr 10, 2026 | Award | 1,617 | — | — | 11.5K | Form 4 ↗ |
KEYTE DAVID H director | Apr 10, 2026 | Award | 2,950 | — | — | 114.7K | Form 4 ↗ |
MCARDLE JANINE J director | Apr 10, 2026 | Award | 1,617 | — | — | 80.5K | Form 4 ↗ |
MOLLENKOPF JOHN C director | Apr 10, 2026 | Award | 1,617 | — | — | 104.7K | Form 4 ↗ |
KLIMLEY BROOKS J director | Apr 10, 2026 | Award | 1,617 | — | — | 71.3K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Antero Midstream Corporation (AM) is primarily owned by institutional investors, who hold approximately 56.8% of total shares outstanding. Company insiders own approximately 30.76%, while retail and public investors account for the remaining 12.42%.
The largest institutional shareholder of Antero Midstream Corporation is BLACKROCK, INC., holding approximately 38.11 million shares — equal to 7.95% of outstanding shares — as of September 30, 2025.
A total of 491 institutional investors currently hold AM stock, with a combined institutional value of approximately $5.25 billion as of the most recent 13F filing period.
Frequently asked questions
AM ownershipAntero Midstream Corporation (AM) is primarily owned by institutional investors, who hold approximately 56.8% of shares. The largest shareholder is BLACKROCK, INC. with a 7.95% stake. Company insiders hold 30.76%. Data sourced from SEC Form 13F as of September 30, 2025.