Thomson Reuters Includes 13F Institutions, Insider Filings, and Mutual Funds. Institutional Holdings (13F) Database provides Institutional Common Stock Holdings and Transactions, as reported on Form 13F filed with the SEC. The Insider Filing Data Feed (IFDF) is designed to capture all U.S. insider activity as reported on Forms 3, 4, 5, and 144 in line-by-line detail. Mutual Fund Holdings Database provides security holding information for all registered mutual funds that report their holdings with the SEC, plus 3,000 global funds.