Why Modine Manufacturing Company (MOD) Stock Fell 11.6% on Sep 28, 2026
The clearest new catalyst: SpinCo record date and due-bills trading.
Why did MOD stock fall?
Modine Manufacturing stock declined 11.6% on September 28, 2026, the record date for its SpinCo distribution tied to the combination of its Performance Technologies business with Gentherm. Beginning this date, Modine shares traded with "due bills" attached, granting holders the right to receive the SpinCo distribution (which converts into Gentherm shares) through the anticipated October 1 closing. The stock's downward adjustment reflects standard market mechanics as the value of the pending spin-off distribution is factored into the trading price ahead of the October 2 ex-spin date.
- SpinCo record date and due-bills trading: September 28, 2026, was set as the record date for the SpinCo distribution. Modine shares began trading with due bills attached, representing the right to receive the distribution through the anticipated October 1 closing, with the ex-spin date set for October 2.
- Spin-off valuation adjustment: The stock price decline reflects standard market mechanics as investors adjust for the value of the pending Gentherm distribution, which will be removed from Modine's equity value once the spin closes and ex-spin trading begins.
Initial detection
BestStocks first flagged MOD intraday on Sep 28, 2026; this analysis was finalized after the close using the confirmed −11.6% session move and additional catalyst research.
Show the initial intraday note
Modine Manufacturing Company moved -9.42% intraday from $198.07 to $179.41. Modine Manufacturing Company (MOD ) stock is trading down on September 28, 2026, because it is the record date for its upcoming SpinCo distribution tied to the combination of its Performance Technologies business with Gentherm. ### Key Details of the Transaction - Due Bills Trading: Beginning September 28, 2026, Modine common stock is trading with "due bills" attached through the anticipated closing date of October 1, 2026. This represents the right to receive the SpinCo distribution that converts into Gentherm shares. - Ex-Spin Date: The due bills will be removed, and the stock will trade without entitlement to the distribution starting October 2, 2026. - Market Mechanics: Stocks often experience downward price adjustments or increased volatility on the record/due-bill start date as the value of the spin-off distribution is factored into the trading price and separation mechanics. If you'd like, I can provide updates on: - The final closing of the Gentherm transaction - The official ex-dividend/ex-spin price adjustment on October 2
What to watch next: Monitor for follow-through at the close.
Frequently asked questions
Why did Modine Manufacturing Company (MOD) stock fall on Sep 28, 2026?
Modine Manufacturing stock declined 11.6% on September 28, 2026, the record date for its SpinCo distribution tied to the combination of its Performance Technologies business with Gentherm. Beginning this date, Modine shares traded with "due bills" attached, granting holders the right to receive the SpinCo distribution (which converts into Gentherm shares) through the anticipated October 1 closing. The stock's downward adjustment reflects standard market mechanics as the value of the pending spin-off distribution is factored into the trading price ahead of the October 2 ex-spin date.
How much did MOD stock fall on Sep 28, 2026?
MOD fell 11.6% during the Sep 28, 2026 trading session.
What were the main drivers behind MOD's move?
SpinCo record date and due-bills trading; Spin-off valuation adjustment.