Form4insider filings, from the source

Company · CIK 0001004434 · SIC 6282 — Investment Advice · NYSE

AFFILIATED MANAGERS GROUP, INC. · AMG

Insider activity reported against this company. All insider holders · On EDGAR ↗

1M3M6M1Y2YAll datashares as filed — not split-adjusted
Open-market buys & salesbuys $229k · 1sales $5.9M · 1net −$5.7M
$10k$10k$100k$100k$1M$1M$10M$10MbuyssalesSep 2024Jan 2025May 2025Sep 2025Jan 2026May 2026Sep 2026

Reported at this company — common stock

TradeReported (ET)InsiderSharesAvg priceTotalOwned afterΔ stakeFlags
Aug 15, 2026 MForm 4/A →Sep 25, 5:01 pm EDTRodriguez Felix Matos VDirector848——5,217—
Aug 15, 2026 MForm 4 →Aug 18, 5:04 pm EDTAnnette FranquiDirector477——2,439—
Aug 15, 2026 MForm 4 →Aug 18, 5:03 pm EDTRodriguez Felix Matos VDirector654——5,023— amended
Aug 15, 2026 MForm 4 →Aug 18, 5:02 pm EDTLoren M StarrDirector716——2,653—
Aug 15, 2026 MForm 4 →Aug 18, 5:01 pm EDTTracy P. PalandjianDirector848——18,375—
Jun 12, 2026 FMForm 4 →Jun 15, 5:03 pm EDTTracy P. PalandjianDirector3,643$133.32$485,67817,527—
Jun 8, 2026 SForm 4 →Jun 8, 7:23 pm EDTJay C. HorgenPresident and CEO, Director17,500$338.27$5,919,725204,706−7.88%
Jun 8, 2026 FMForm 4 →Jun 8, 7:23 pm EDTJay C. HorgenPresident and CEO, Director114,671$165.18$18,940,802222,206—
Jun 1, 2026 PForm 4 →Jun 3, 4:59 pm EDTAnnette FranquiDirector750$304.88$228,6601,962+61.9%

Reported at this company — derivatives (options, RSUs, warrants)

TradeReported (ET)InsiderSharesAvg priceTotalOwned afterΔ stakeFlags
Aug 15, 2026 MForm 4/A →Sep 25, 5:01 pm EDTRodriguez Felix Matos VDirector848——933—
Aug 15, 2026 MForm 4 →Aug 18, 5:04 pm EDTAnnette FranquiDirector477——609—
Aug 15, 2026 MForm 4 →Aug 18, 5:03 pm EDTRodriguez Felix Matos VDirector654——1,127— amended
Aug 15, 2026 MForm 4 →Aug 18, 5:02 pm EDTLoren M StarrDirector716——3,027—
Aug 15, 2026 MForm 4 →Aug 18, 5:01 pm EDTTracy P. PalandjianDirector848——1,731—
Jul 30, 2026 AForm 4 →Aug 3, 5:10 pm EDTLoren M StarrDirector621——210—
Jul 30, 2026 AForm 4 →Aug 3, 5:08 pm EDTAnnette FranquiDirector274——274—
Jul 30, 2026 AForm 4 →Aug 3, 5:06 pm EDTTracy P. PalandjianDirector274——274—
Jul 30, 2026 AForm 4 →Aug 3, 5:04 pm EDTRodriguez Felix Matos VDirector274——274—
Jul 30, 2026 AForm 4 →Aug 3, 5:02 pm EDTMarcy EngelDirector274——274—
Jul 30, 2026 AForm 4 →Aug 3, 5:00 pm EDTG. Staley CatesDirector274——274—
Jun 12, 2026 MForm 4 →Jun 15, 5:03 pm EDTTracy P. PalandjianDirector2,958——0—
Jun 8, 2026 MForm 4 →Jun 8, 7:23 pm EDTJay C. HorgenPresident and CEO, Director75,000——0—