PubMatic, Inc. Class A Common Stock (PUBM)

About PubMatic, Inc. Class A Common Stock

PubMatic Inc is is an independent, artificial intelligence-powered advertising technology company that delivers digital advertising performance. Its integrated technology platform connects buyers, publishers, data providers, and commerce media networks on a single, unified platform, to deliver advertising performance, control, transparency and efficiency. Its platform empowers the world's digital content creators (publishers) to maximize monetization of their advertising inventory and audiences and provides control and transparency to buyers, which includes advertisers, agencies, agency trading desks, and demand side platforms (DSPs) (referred as buyers). Geographically, the company generates the majority of its revenue from the United States, followed by EMEA, APAC, and Rest of the World.

Institutional ownership

In 13F filings for the quarter ended June 30, 2026, 147 institutions reported holding PUBM, with 30.2 million shares worth $395.4 million in aggregate. The largest reported holder was Graham Holdings, with 3.4 million shares worth $44.6 million. Of the 5 largest holders listed below, 3 added shares, 1 reduced its position and 1 held its position unchanged during the quarter.

Form 13F is a quarterly report that institutional investment managers with at least $100 million in qualifying securities file with the SEC. It lists long positions as of the last day of the quarter and is due within 45 days of quarter end, so these holdings describe that date rather than today.

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