Gartner, Inc.
A research and advisory firm that helps companies around the world decide what technology to buy, serving thousands of enterprises through subscriptions, the Symposium/Xpo conference series, and custom consulting. Founded in 1979 by former IBM analyst Gideon Gartner, who gave the firm his own name, it built its reputation on the Magic Quadrant reports that rank technology vendors on a simple two-axis chart.
Estimated from filings — the split-adjusted price range over the quarters each manager built the position. A range, not a fill price; 13F reports a quarter-end snapshot, not a trade date.