William Siedenburg debuted on the All-America Research Team as a runner-up in Nonferrous Metals in 1975 and climbed to third place the following year. Investors appreciated the Wood, Struthers & Winthrop analyst for “filling them in on the nitty-gritty details,” as one money manager told Institutional Investor in 1976. “He’ll tear the numbers apart, spell out his assumptions and let you know how he arrives at his earnings estimates,” said another. In 1977, as Donaldson, Lufkin & Jenrette Securities Corp. was acquiring Wood Struthers, Siedenburg moved to Smith Barney, Harris Upham & Co. In 1979 he claimed the first of ten consecutive appearances at the top of the roster, thanks in part to being “one of the few who turned positive last summer, before the copper stocks took off,” according to one grateful investor.
Although well into his 60s by the late 1980s, Siedenburg continued to impress backers with his “youthful enthusiasm,” “methodical attention to detail” and “eagerness to service clients.” He retired from the firm in 1991.
