As expected, NYSE Group filed an S-1 registration statement today for the resale of shares received by former seat-holders in the NYSE/Archipelago merger that closed last week. The registration statement is for $100 million of common stock but according to this article, the amount will likely be revised upward. The NYSE will not receive any proceeds from the offering.
NYSE Files Registration Statement
Bill Sjostrom, NYSE Files Registration Statement, Truth on the Market (March 13, 2006), https://truthonthemarket.com/2006/03/13/nyse-files-registration-statement/