Firstar Investment Research and Management Co., Milwaukee, the investment advisory subsidiary of Firstar Corp., has promoted Joe Frohna and Alex Paul to portfolio manager.

Mr. Frohna was named head of the company's Portico Microcap Fund, which is designed for aggressive-growth investors. He succeeded Mark Westman, who left to join Lincoln Capital Management, Chicago.

Mr. Paul, an equity analyst, was named co-manager with two others of Firstar Investment's Portico Growth Fund.

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