MAIR · Madison Air Solutions 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 MAIR
All superinvestors →Holder Concentration
Across 159 13F filersWho Holds MAIR
Last 2 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: 158 filers, like-for-like change —.
| Holder type | Share | Filers | Change |
|---|---|---|---|
| Registered adviser | 46.1% | 77 | new |
| Exempt adviser | 0.3% | 4 | new |
| Adviser | 17.7% | 7 | new |
| Bank | 2.3% | 16 | new |
| Broker-dealer | 0.0% | 1 | new |
| Benefit plan | 0.1% | 1 | new |
| Non-US | 3.3% | 5 | new |
| Holding company | 22.7% | 7 | new |
| Unknown | 7.6% | 40 | new |
| Style | Share | Filers | Change |
|---|---|---|---|
| Index-like | 16.8% | 12 | new |
| Systematic-like | 9.3% | 16 | new |
| Concentrated | 15.1% | 21 | new |
| Diversified active | 58.8% | 109 | new |
| Turnover | Share | Filers | Change |
|---|---|---|---|
| Low turnover | 37.5% | 62 | new |
| Medium turnover | 30.6% | 32 | new |
| High turnover | 25.1% | 54 | new |
| Unknown | 6.8% | 10 | new |
| Holding horizon | Share | Filers | Change |
|---|---|---|---|
| Short horizon | 18.1% | 33 | new |
| Medium horizon | 19.2% | 26 | new |
| Long horizon | 45.3% | 80 | new |
| Unknown | 17.3% | 19 | new |
| 13F book size | Share | Filers | Change |
|---|---|---|---|
| Under $1B | 0.2% | 20 | new |
| $1B to $10B | 21.9% | 48 | new |
| $10B to $100B | 21.9% | 42 | new |
| $100B or more | 55.9% | 48 | new |
| Client base | Share | Filers | Change |
|---|---|---|---|
| Individuals and high net worth | 0.2% | 24 | new |
| Pooled investment vehicles | 31.6% | 36 | new |
| Registered funds and BDCs | 13.4% | 13 | new |
| Other investment advisers | 0.0% | 1 | new |
| Diversified | 0.8% | 2 | new |
| Unknown | 54.0% | 82 | new |
| Private funds | Share | Filers | Change |
|---|---|---|---|
| Hedge funds | 24.9% | 39 | new |
| Private equity funds | 1.2% | 4 | new |
| Venture capital funds | 0.0% | 1 | new |
| Real estate funds | 0.0% | 2 | new |
| Other private funds | 11.4% | 4 | new |
| Mixed private funds | 0.6% | 1 | new |
| Private funds, type not stated | 0.3% | 1 | new |
| No private funds | 8.0% | 29 | new |
| Unknown | 53.7% | 77 | new |
| Location | Share | Filers | Change |
|---|---|---|---|
| United States | 90.4% | 131 | new |
| Outside the US | 9.6% | 27 | new |
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 2 holders with no observed 2026-03-31 13F.
Conviction and Crowding
158 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 $27,284,115 (1 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 99.2% 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 MAIR's active holders also own, quarter ended Jun 30, 2026Shareholder Targets
13F filers that own its peers but not MAIR, quarter ended Jun 30, 2026Found through its holder-overlap peers: FRVO, ARXS, DPC, QNT, LGN, INIO, XE, HAWK, LCLN, KBON, EQPT, ANDG, MDLN, LFTO, FPS, MWH, CBRS, BKV, MMED, EROC. 1,004 filers in all.
| # | Filer | In peers | Largest peers |
|---|---|---|---|
| 1 | Advent International, L.P. Unknown, Concentrated | $13,256,154,166 3 held | INIO, ARXS, DPC |
| 2 | Carlyle Group Inc. Registered adviser, Concentrated | $7,378,581,640 1 held | MDLN |
| 3 | AMERICAN SECURITIES LLC Registered adviser, Unknown | $2,823,439,654 1 held | MWH |
| 4 | H&F Corporate Investors X, Ltd. Unknown, Unknown | $2,795,283,417 1 held | MDLN |
| 5 | COATUE MANAGEMENT LLC Registered adviser, Concentrated | $2,694,644,662 2 held | CBRS, FPS |
| 6 | Capital Research Global Investors Adviser, Diversified active | $2,649,808,802 8 held | MDLN, INIO, CBRS |
| 7 | ECLIPSE OPERATIONS, LLC Exempt adviser, Unknown | $2,529,625,670 1 held | CBRS |
| 8 | Jupiter Topco LLC Unknown, Diversified active | $1,922,923,777 12 held | MDLN, FPS, LGN |
| 9 | Altimeter Capital Management, LP Registered adviser, Concentrated | $1,596,733,177 1 held | CBRS |
| 10 | MASSACHUSETTS FINANCIAL SERVICES CO /MA/ Registered adviser, Diversified active | $1,474,564,053 10 held | MDLN, INIO, MMED |
Fund Ownership of MAIR by Fund Type
Registered funds' Form N-PORT reports for the quarter ended Jun 30, 2026Index funds and index ETFs hold 1.63% of shares outstanding.
| Fund type | Of shares outstanding | Shares |
|---|---|---|
| Index funds | 0.17% | 873,729 |
| Index ETFs | 1.46% | 7,305,689 |
| Active ETFs | 0.16% | 796,203 |
| Active funds | 4.53% | 22,716,170 |
| Unclassified | 0.00% | 0 |
| All registered funds | 6.32% | 31,691,791 |
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 FMR LLC Holding company | $549,314,961 | 11.43% | 14,084,999 | Shares | 2026-08-13 | |
| Large Durable Capital Partners LP Adviser | $397,662,954 | 8.28% | 10,196,486 | Shares | 2026-08-14 | |
| Mega Invesco Ltd. Adviser | $304,392,075 | 6.33% | 7,804,925 | Shares | 2026-08-14 | |
| Mega BlackRock, Inc. Holding company | $292,548,009 | 6.09% | 7,501,231 | Shares | 2026-08-07 | |
| Mid HRTG GPE, LLC Registered adviser | $288,888,873 | 6.01% | 7,407,407 | Shares | 2026-08-13 | |
| Mega CITADEL ADVISORS LLC Registered adviser | $251,480,619 | 5.23% | 6,448,221 | Shares | 2026-09-02 | |
| Mega MORGAN STANLEY Holding company | $225,932,070 | 4.70% | 5,793,130 | Shares | 2026-08-13 | |
| Mega Pictet Asset Management Holding SA | $172,953,807 | 3.60% | 4,434,713 | Shares | 2026-07-30 | |
| Mid Zimmer Partners, LP Registered adviser | $161,881,590 | 3.37% | 4,150,810 | Shares | 2026-08-14 | |
| Mid Forest Avenue Capital Management LP Registered adviser | $158,405,832 | 3.30% | 4,061,688 | Shares | 2026-08-14 | |
| Mega VANGUARD CAPITAL MANAGEMENT LLC Registered adviser | $144,792,102 | 3.01% | 3,712,618 | Shares | 2026-08-13 | |
| Large LORD, ABBETT & CO. LLC Registered adviser | $124,464,171 | 2.59% | 3,191,389 | Shares | 2026-08-14 | |
| Mega VANGUARD PORTFOLIO MANAGEMENT LLC Registered adviser | $119,550,678 | 2.49% | 3,065,402 | Shares | 2026-08-13 | |
| Mega PRICE T ROWE ASSOCIATES INC /MD/ Registered adviser | $116,621,076 | 2.43% | 2,990,284 | Shares | 2026-08-14 | |
| Mid XN LP Registered adviser | $102,585,717 | 2.13% | 2,630,403 | Shares | 2026-08-14 | |
| Mega T. Rowe Price Investment Management, Inc. Adviser | $95,401,917 | 1.99% | 2,446,203 | Shares | 2026-08-14 | |
| Large HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND Non-US | $95,282,109 | 1.98% | 2,443,131 | Shares | 2026-08-13 | |
| Mid Merewether Investment Management, LP Registered adviser | $75,805,392 | 1.58% | 1,943,728 | Shares | 2026-08-14 | |
| Large Alyeska Investment Group, L.P. Registered adviser | $67,411,383 | 1.40% | 1,728,497 | Shares | 2026-08-14 | |
| Large ExodusPoint Capital Management, LP Registered adviser | $51,830,532 | 1.08% | 1,328,988 | Shares | 2026-08-14 | |
| Large D1 Capital Partners L.P. Registered adviser | $48,750,000 | 1.01% | 1,250,000 | Shares | 2026-08-14 | |
| Large BAMCO INC /NY/ Registered adviser | $45,612,060 | 0.95% | 1,169,540 | Shares | 2026-08-14 | |
| Mega BANK OF AMERICA CORP /DE/ Bank | $45,243,666 | 0.94% | 1,160,094 | Shares | 2026-08-14 | |
| Large Schonfeld Strategic Advisors LLC Registered adviser | $39,138,216 | 0.81% | 1,003,544 | Shares | 2026-08-14 | |
| Mega NORGES BANK Non-US | $39,000,000 | 0.81% | 1,000,000 | Shares | 2026-08-12 | |
| Mid Robeco Schweiz AG | $37,832,979 | 0.79% | 1,537,926 | Shares | 2026-10-23 | |
| Mega GEODE CAPITAL MANAGEMENT, LLC Registered adviser | $37,203,075 | 0.77% | 953,925 | Shares | 2026-08-12 | |
| Mid Ghisallo Capital Management LLC Registered adviser | $31,200,000 | 0.65% | 800,000 | Shares | 2026-08-14 | |
| Large Balyasny Asset Management L.P. Registered adviser | $30,847,947 | 0.64% | 790,973 | Shares | 2026-08-14 | |
| Mid Burkehill Global Management, LP Registered adviser | $28,275,000 | 0.59% | 725,000 | Shares | 2026-08-14 | |
| Mid SEVEN GRAND MANAGERS, LLC Registered adviser | $27,300,000 | 0.57% | 700,000 | Shares | 2026-08-14 | |
| Large Driehaus Capital Management LLC Registered adviser | $26,496,717 | 0.55% | 679,403 | Shares | 2026-08-14 | |
| Mid SOROS FUND MANAGEMENT LLC | $24,375,156 | 0.51% | 625,004 | Shares | 2026-08-14 | |
| Mid BlueCrest Capital Management Ltd | $23,790,000 | 0.50% | 610,000 | Shares | 2026-08-14 | |
| Mega DEUTSCHE BANK AG\ Non-US | $23,521,563 | 0.49% | 603,117 | Shares | 2026-08-07 | |
| Mega UBS Group AG Bank | $23,367,357 | 0.49% | 599,163 | Shares | 2026-08-13 | |
| Mega MILLENNIUM MANAGEMENT LLC Registered adviser | $22,637,745 | 0.47% | 580,455 | Shares | 2026-08-14 | |
| Mega JANE STREET GROUP, LLC | $21,569,925 | 0.45% | 553,075 | Shares | 2026-08-14 | |
| Mega VANGUARD FIDUCIARY TRUST CO | $21,254,688 | 0.44% | 544,992 | Shares | 2026-08-13 | |
| Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC Registered adviser | $20,629,635 | 0.43% | 528,965 | Shares | 2026-08-14 | |
| Mega FRANKLIN RESOURCES INC Adviser | $17,895,111 | 0.37% | 458,849 | Shares | 2026-08-13 | |
| Mid Longaeva Partners L.P. | $17,721,288 | 0.37% | 454,392 | Shares | 2026-08-14 | |
| Large Jain Global LLC Registered adviser | $16,792,893 | 0.35% | 430,587 | Shares | 2026-08-14 | |
| Mega STATE STREET CORP Bank | $16,557,996 | 0.34% | 424,564 | Shares | 2026-09-22 | |
| Mid READYSTATE ASSET MANAGEMENT LP Registered adviser | $16,029,000 | 0.33% | 411,000 | Shares | 2026-08-14 | |
| Large Hudson Bay Capital Management LP Registered adviser | $15,667,860 | 0.33% | 401,740 | Shares | 2026-08-14 | |
| Large Daiwa Securities Group Inc. | $15,627,963 | 0.33% | 400,717 | Shares | 2026-07-31 | |
| Large Blackstone Inc. Adviser | $15,600,000 | 0.32% | 400,000 | Shares | 2026-08-14 | |
| Mega Capital World Investors Adviser | $15,362,958 | 0.32% | 393,922 | Shares | 2026-08-12 | |
| Mega JENNISON ASSOCIATES LLC Registered adviser | $14,785,719 | 0.31% | 379,121 | Shares | 2026-08-03 | |
| Mega TWO SIGMA INVESTMENTS, LP Registered adviser | $12,420,759 | 0.26% | 318,481 | Shares | 2026-08-14 | |
| Large LMR Partners LLP Exempt adviser | $11,986,806 | 0.25% | 307,354 | Shares | 2026-08-14 | |
| Mid TimesSquare Capital Management, LLC Registered adviser | $11,921,559 | 0.25% | 305,681 | Shares | 2026-08-07 | |
| Large Freestone Grove Partners LP Registered adviser | $10,574,889 | 0.22% | 271,151 | Shares | 2026-08-14 | |
| Mega D. E. Shaw & Co., Inc. | $10,202,400 | 0.21% | 261,600 | Shares | 2026-08-14 | |
| Mega GOLDMAN SACHS GROUP INC Holding company | $9,471,345 | 0.20% | 242,855 | Shares | 2026-08-14 | |
| Large Hood River Capital Management LLC Registered adviser | $9,237,111 | 0.19% | 236,849 | Shares | 2026-08-14 | |
| Large Walleye Capital LLC Registered adviser | $9,008,571 | 0.19% | 230,989 | Shares | 2026-08-03 | |
| Mega WELLS FARGO & COMPANY/MN Bank | $8,882,211 | 0.18% | 227,749 | Shares | 2026-08-14 | |
| Mega NORTHERN TRUST CORP Bank | $7,828,665 | 0.16% | 200,735 | Shares | 2026-08-13 | |
| Mid Davidson Kempner Capital Management LP Registered adviser | $7,800,000 | 0.16% | 200,000 | Shares | 2026-08-14 | |
| Mid BW Gestao de Investimentos Ltda. | $7,800,000 | 0.16% | 200,000 | Shares | 2026-08-14 | |
| Large TUDOR INVESTMENT CORP ET AL Registered adviser | $7,217,184 | 0.15% | 185,056 | Shares | 2026-08-14 | |
| Mega ENVESTNET ASSET MANAGEMENT INC Registered adviser | $7,134,231 | 0.15% | 182,929 | Shares | 2026-09-23 | |
| Mega TD Asset Management Inc | $6,863,298 | 0.14% | 175,982 | Shares | 2026-08-04 | |
| Mid Weiss Asset Management LP Registered adviser | $6,630,000 | 0.14% | 170,000 | Shares | 2026-08-14 | |
| Mega Amundi Holding company | $6,405,867 | 0.13% | 164,253 | Shares | 2026-08-11 | |
| Large Point72 Asset Management, L.P. Registered adviser | $5,845,359 | 0.12% | 149,881 | Shares | 2026-08-14 | |
| Mid XTX Topco Ltd | $4,437,264 | 0.09% | 113,776 | Shares | 2026-08-14 | |
| Large TEACHER RETIREMENT SYSTEM OF TEXAS Benefit plan | $3,900,000 | 0.08% | 100,000 | Shares | 2026-08-14 | |
| Large Woodline Partners LP Registered adviser | $3,900,000 | 0.08% | 100,000 | Shares | 2026-08-14 | |
| Mega JPMORGAN CHASE & CO Bank | $3,857,724 | 0.08% | 98,916 | Shares | 2026-08-12 | |
| Mid Madison Asset Management, LLC Registered adviser | $3,214,653 | 0.07% | 82,427 | Shares | 2026-08-10 | |
| Small PINNBROOK CAPITAL MANAGEMENT LP Registered adviser | $3,143,400 | 0.07% | 80,600 | Shares | 2026-08-12 | |
| Large Squarepoint Ops LLC Registered adviser | $3,118,050 | 0.06% | 79,950 | Shares | 2026-08-14 | |
| Large Centiva Capital, LP Registered adviser | $2,925,000 | 0.06% | 75,000 | Shares | 2026-08-13 | |
| Mid Shay Capital LLC | $2,145,000 | 0.04% | 55,000 | Shares | 2026-08-14 | |
| Mega STIFEL FINANCIAL CORP | $2,070,705 | 0.04% | 53,095 | Shares | 2026-08-12 | |
| Mega SEI INVESTMENTS CO Holding company | $2,028,117 | 0.04% | 52,003 | Shares | 2026-08-14 | |
| Mid Wolf Hill Capital Management, LP Registered adviser | $1,950,000 | 0.04% | 50,000 | Shares | 2026-08-13 | |
| Mega UBS Group AG Bank | $1,809,600 | 0.04% | 46,400 | Call | 2026-08-13 | |
| Mega Bank of New York Mellon Corp Bank | $1,658,631 | 0.03% | 42,529 | Shares | 2026-08-06 | |
| Mid Aventail Capital Group, LP Registered adviser | $1,515,345 | 0.03% | 38,855 | Shares | 2026-08-14 | |
| Mid Engineers Gate Manager LP | $1,503,060 | 0.03% | 38,540 | Shares | 2026-08-14 | |
| Large Holocene Advisors, LP Registered adviser | $1,465,113 | 0.03% | 37,567 | Shares | 2026-08-14 | |
| Mega ROYAL BANK OF CANADA Bank | $1,365,624 | 0.03% | 35,016 | Shares | 2026-08-14 | |
| Small Lisanti Capital Growth, LLC | $1,365,585 | 0.03% | 35,015 | Shares | 2026-08-10 | |
| Mega Vanguard Global Advisers, LLC Registered adviser | $1,320,930 | 0.03% | 33,870 | Shares | 2026-08-13 | |
| Large FRED ALGER MANAGEMENT, LLC Registered adviser | $1,315,704 | 0.03% | 33,736 | Shares | 2026-08-14 | |
| Mid Covalis Capital LLP Registered adviser | $1,170,000 | 0.02% | 30,000 | Shares | 2026-08-13 | |
| Small Renaissance Capital LLC Registered adviser | $1,068,771 | 0.02% | 43,446 | Shares | 2026-10-23 | |
| Mega Cetera Investment Advisers Registered adviser | $1,005,888 | 0.02% | 25,792 | Shares | 2026-08-12 | |
| Large AGF MANAGEMENT LTD | $975,000 | 0.02% | 25,000 | Shares | 2026-08-10 | |
| Large Vestmark Advisory Solutions, Inc. Registered adviser | $967,122 | 0.02% | 24,798 | Shares | 2026-08-14 | |
| Large COHEN & STEERS, INC. Adviser | $780,000 | 0.02% | 20,000 | Shares | 2026-08-14 | |
| Mega JONES FINANCIAL COMPANIES LLLP | $769,743 | 0.02% | 19,737 | Shares | 2026-08-14 | |
| Mid Inspire Investing, LLC Registered adviser | $766,437 | 0.02% | 31,156 | Shares | 2026-10-22 | |
| Mega LPL Financial LLC Broker-dealer | $764,361 | 0.02% | 19,599 | Shares | 2026-08-07 | |
| Large NATIXIS ADVISORS, LLC Registered adviser | $758,589 | 0.02% | 19,451 | Shares | 2026-08-14 | |
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP | $692,211 | 0.01% | 17,749 | Shares | 2026-08-14 |
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