Madison Air Solutions shares traded higher Thursday after a fresh ownership disclosure showed a new 5%+ holder in the newly public HVAC and air-quality supplier. A Schedule 13G filed April 23, 2026, lists Durable Capital Partners LP as beneficially owning 9,259,259 shares of MAIR’s Class A common stock, representing 5.2% of the class, based on the company’s reported Class A share count in its April 17, 2026 prospectus. (app.quotemedia.com)

A 5%+ stake disclosure can act as a near-term catalyst in a recent IPO because it signals institutional demand for shares and can tighten the perceived tradable float. In MAIR’s case, the filing uses an event date of April 16, 2026—around the start of public trading—suggesting the position was built at or near the IPO process and is now becoming visible to the broader market. (app.quotemedia.com)

The ownership news lands just weeks before MAIR reports its first quarter 2026 results as a public company. Madison Air has scheduled a conference call and webcast for Tuesday, May 12, 2026 at 8:30 a.m. EDT, with the earnings release planned earlier that morning. (investors.madisonair.com)

MAIR has seen a stream of post-IPO filings as it transitions to public-company reporting, including an IPO-related Form 8-K detailing the April 15 pricing at $27 per share and the April 17 closing. In late April, the company also posted additional ownership-related filings, including a Form 3 dated April 29, 2026. (app.quotemedia.com)