Updated Jul 16, 2026 · Last SEC filing 2026-06-15
AFFILIATED MANAGERS GROUP, INC. (AMG) has filed 7 SEC Form 4 insider transactions in the last 90 days, with the most recent on 2026-06-15. 3 Form 8-K material event filings were reported by AMG in the last 90 days. 4 Form 144 notices of proposed sale were filed for AMG stock. InsiderAlpha tracks every AMG SEC filing — Form 4, Form 144, and 8-K — in real time, including Rule 10b5-1 plan detection.
| SIC classification | Investment Advice (SIC 6282) |
|---|---|
| SEC CIK | 0001004434 |
| Form 4 filings (90d) | 7 |
|---|---|
| Form 8-K filings (90d) | 3 |
| Form 144 notices (90d) | 4 |
| Latest Form 4 filing | 2026-06-15 |
| Date | Insider | Role | Transaction | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| Palandjian Tracy P. | Director | M — Option exercise | 3.0K | $82.07 | $243K | SEC | |
| Palandjian Tracy P. | Director | F — Tax withholding / forfeiture | 685 | $354.62 | $243K | SEC | |
| Horgen Jay C. | President and CEO | S — Open-market sale | 17.5K | $338.27 | $5.92M | SEC | |
| Horgen Jay C. | President and CEO | M — Option exercise | 75.0K | $74.49 | $5.59M | SEC | |
| Horgen Jay C. | President and CEO | F — Tax withholding / forfeiture | 39.7K | $336.62 | $13.35M | SEC | |
| FRANQUI ANNETTE | Director | P — Open-market purchase | 750 | $304.88 | $229K | SEC | |
| Matos Rodriguez Felix V. | Director | S — Open-market sale | 1.0K | $300.18 | $300K | SEC | |
| Ryan David Christopher | Director | S — Open-market sale | 3.4K | $305.06 | $1.04M | SEC | |
| Cates G. Staley | Director | P — Open-market purchase | 1.5K | $305.83 | $459K | SEC | |
| Padiyar Kavita | General Counsel & Corp. Sec. | S — Open-market sale | 2.2K | $278.24 | $612K | SEC | |
| Wojcik Thomas M | President and COO | S — Open-market sale | 8.0K | $286.30 | $2.29M | SEC | |
| Horgen Jay C. | Chief Executive Officer | M — Option exercise | 17.6K | $0.00 | — | SEC | |
| Padiyar Kavita | General Counsel & Corp. Sec. | M — Option exercise | 2.3K | $0.00 | — | SEC | |
| Padiyar Kavita | General Counsel & Corp. Sec. | F — Tax withholding / forfeiture | 2.3K | $299.18 | $683K | SEC | |
| Palandjian Tracy P. | Director | M — Option exercise | 867 | $0.00 | — | SEC |
All transactions sourced from SEC EDGAR Form 4 filings for AFFILIATED MANAGERS GROUP, INC. (AMG). Updated in real time as new filings are submitted to the SEC.
| Insider | Form 4 filings | Total transaction value |
|---|---|---|
| Horgen Jay C. | 4 | $24.86M |
| Palandjian Tracy P. | 3 | $486K |
| Cates G. Staley | 2 | $459K |
| Matos Rodriguez Felix V. | 1 | $300K |
| FRANQUI ANNETTE | 1 | $229K |
Form 144 must be filed before insiders sell restricted or control stock above SEC thresholds. A cluster of Form 144 notices often precedes a wave of insider distribution.
SEC Form 4 transactions are reported with a one-letter code indicating the type of transaction. Common codes you'll see in AMG insider filings:
| P | Open-market purchase by the insider |
|---|---|
| S | Open-market sale by the insider |
| A | Grant, award, or other acquisition from the issuer |
| M | Exercise or conversion of derivative security (e.g. options) |
| F | Payment of exercise price or tax liability via share withholding |
| G | Bona-fide gift of securities |
| D | Disposition to the issuer (e.g. share buyback participation) |
| J | Other acquisition or disposition |
| X | Exercise of in-the-money or at-the-money derivative security |
| C | Conversion of derivative security |
| V | Transaction voluntarily reported earlier than required |
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