Arkolith/Insider Trading/AMG/Form 4

Horgen Jay C.

Chief Executive Officer, DirectorAFFILIATED MANAGERS GROUP, INC. (AMG) · full profile →Form 4 · filed Mar 9, 2026
No Open-Market Flow
Open-Market Buys
$0
Open-Market Sells
$0
Net Open-Market Flow
$0
Transactions
5
3 non-derivative · 2 derivative

Non-Derivative Transactions (Table I)

DateActionSharesPriceValueOwned After
Mar 5, 2026Tax withholding(F)18K$299.18$5.5M337K
Mar 5, 2026Grant(A)27K—$0355K
Mar 5, 2026Option exercise(M)18K—$0328K

Derivative Transactions (Table II)

DateActionSharesPriceValueOwned After
Mar 5, 2026Option exercise(M)18K—$023K
Mar 5, 2026Grant(A)9K—$09K

Transaction Codes

F
Shares withheld for taxes
A
Grant / award
M
Option exercise / conversion

Data Source & Provenance

Parsed from a single SEC EDGAR Form 4 filing (accession 0001004434-26-000031) within minutes of acceptance. Every field above traces to the original document. Verify it directly:

View original filing on SEC.govRaw Form 4 XML