Affiliated Managers Group, Inc.

Neither. Affiliated Managers Group, Inc. (MGRB) insiders filed no open-market purchases or sales in the 90 days to Oct 24, 2026, according to SEC Form 4 filings.

None. No member of Congress disclosed a MGRB trade with a trade date in the last 180 days, according to House and Senate STOCK Act filings.

This summary uses filings available on Oct 24, 2026. Insiders must report trades to the SEC within 2 business days, members of Congress have up to 45 days to disclose a trade, and funds file 13F holdings up to 45 days after each quarter ends, so the latest moves may not be public yet.