Activist investor Richard "Mick" McGuire and his hedge fund, Marcato Capital, has pared its large stake in LPL Financial stock, according to an SEC filing. The sales come five months after Marcato started buying shares in August.

Between Jan. 5 and 13, Marcato sold 1.658 million shares at prices ranging from $37.03 to $42.06.

McGuire did not immediately respond to a request for comment.

In September, Marcato called the stock undervalued in an SEC filing and suggested it wanted to discuss company strategy with company executives.

Investors in LPL have been frustrated: The stock debuted at $32 five years ago and dropped from $56 last March to $39 in September, before advancing to $41.55 on news of Marcato's surprise investment.

McGuire is known for his shareholder activism with Sotheby's and Bank of New York Mellon, among other companies.
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