Article: Radnor Research joins NYSE: The Main Line company is among the specialized trade-execution firms the Big Board is adding.

Byline: Joseph N. DiStefano

Nov. 29--A Main Line trading firm is the newest member of the New York Stock Exchange.

Radnor Research & Trading Co. L.L.C. said yesterday that it had joined the exchange, taking control of three of the 1,366 trading seats after a yearlong application process that spanned the Big Board's conversion from a member-owned cooperative to a publicly traded corporation.

"We're part of a trend of highly specialized, niche-type" stock and options trade-execution firms that are joining the exchange, said cofounder and president Morgan Simpson, who started the firm three years ago with James Crompton.

Membership ...

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