Stagwell's three largest insider shareholders as of March 23, 2026 are Mark Jeffery Penn (Chief Executive Officer, 27.20Mn shares), Mark Jeffery Penn (Chief Executive Officer, 22.30Mn shares), Sachs Group Inc Goldman (TenPercentOwner, 12.98Mn shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Mark Jeffery Penn | Chief Executive Officer | 27,197,765 | 0 | 10 Mar, 2026 |
| Mark Jeffery Penn | Chief Executive Officer | 22,625,558 | 0 | 13 Mar, 2026 |
| Mark Jeffery Penn | Chief Executive Officer | 0 | 22,296,375 | 18 Apr, 2025 |
| Mark Jeffery Penn | Chief Executive Officer | 0 | 22,296,375 | 18 Apr, 2025 |
| Sachs Group Inc Goldman | 0 | 12,981,022 | 17 Jun, 2024 | |
| Eli Samaha | 0 | 8,014,322 | 06 Jun, 2025 | |
| Jay Leveton | President | 2,577,168 | 0 | 10 Mar, 2026 |
| Bradley J. Gross | 0 | 2,293,238 | 01 Dec, 2025 | |
| Jay Leveton | President | 1,912,414 | 0 | 13 Mar, 2026 |
| Ryan Greene | Chief Financial Officer | 1,725,171 | 0 | 10 Mar, 2026 |
| Ryan Greene | Chief Financial Officer | 1,321,454 | 0 | 13 Mar, 2026 |
| Frank P Lanuto | Evp, Finance | 520,322 | 0 | 10 Mar, 2026 |
| Frank P Lanuto | Evp, Finance | 479,788 | 0 | 13 Mar, 2026 |
| Charlene Barshefsky | 215,316 | 0 | 16 Jun, 2025 | |
| Charlene Barshefsky | 215,316 | 0 | 16 Jun, 2025 | |
| Irwin D Simon | 205,921 | 0 | 16 Jun, 2025 | |
| Brandt A. Vaughan | 192,397 | 0 | 05 Jan, 2026 | |
| Desiree G Rogers | 192,014 | 0 | 16 Jun, 2025 | |
| Wade Oosterman | 180,966 | 0 | 16 Jun, 2025 | |
| Vincenzo Dimaggio | Svp, Chief Accounting Officer | 165,945 | 0 | 02 Apr, 2025 |
| Eli Samaha | 141,923 | 0 | 05 Jan, 2026 | |
| Rodney E Slater | 117,710 | 0 | 16 Jun, 2025 | |
| Peter Mcelligott | General Counsel | 85,795 | 0 | 10 Mar, 2026 |
| Vaughan A. Brandt | 78,500 | 0 | 11 Aug, 2021 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 11 Mar, 2026 | Ryan Greene | Class A Common Stock | D | 403,717 | $6.17 | 1,321,454 | D | D |
| 11 Mar, 2026 | Jay Leveton | Class A Common Stock | D | 664,754 | $6.17 | 1,912,414 | D | D |
| 11 Mar, 2026 | Mark Jeffery Penn | Class A Common Stock | D | 4,572,207 | $6.17 | 22,625,558 | D | D |
| 11 Mar, 2026 | Frank P Lanuto | Class A Common Stock | D | 40,534 | $6.17 | 479,788 | D | D |
| 07 Mar, 2026 | Peter Mcelligott | Class A Common Stock | D | 8,512 | $5.24 | 85,795 | D | F |
| 07 Mar, 2026 | Jay Leveton | Class A Common Stock | D | 44,230 | $5.24 | 2,577,168 | D | F |
| 07 Mar, 2026 | Mark Jeffery Penn | Class A Common Stock | D | 75,447 | $5.24 | 27,197,765 | D | F |
| 07 Mar, 2026 | Jay Leveton | Class A Common Stock | D | 44,230 | $5.24 | 2,577,168 | D | F |
| 07 Mar, 2026 | Ryan Greene | Class A Common Stock | D | 9,359 | $5.24 | 1,725,171 | D | F |
| 07 Mar, 2026 | Mark Jeffery Penn | Class A Common Stock | D | 75,447 | $5.24 | 27,197,765 | D | F |
| 07 Mar, 2026 | Frank P Lanuto | Class A Common Stock | D | 16,208 | $5.24 | 520,322 | D | F |
| 07 Mar, 2026 | Ryan Greene | Class A Common Stock | D | 9,359 | $5.24 | 1,725,171 | D | F |
| 07 Mar, 2026 | Frank P Lanuto | Class A Common Stock | D | 16,208 | $5.24 | 520,322 | D | F |
| 03 Mar, 2026 | Ryan Greene | Class A Common Stock | D | 4,513 | $0.00 | 1,755,935 | D | D |
| 03 Mar, 2026 | Mark Jeffery Penn | Class A Common Stock | D | 57,689 | $0.00 | 27,502,741 | D | D |
| 03 Mar, 2026 | Frank P Lanuto | Class A Common Stock | D | 12,264 | $0.00 | 582,064 | D | D |
| 03 Mar, 2026 | Jay Leveton | Class A Common Stock | D | 11,855 | $0.00 | 2,681,865 | D | D |
| 03 Mar, 2026 | Peter Mcelligott | Class A Common Stock | D | 1,831 | $0.00 | 104,428 | D | D |
| 03 Mar, 2026 | Mark Jeffery Penn | Class A Common Stock | D | 57,689 | $0.00 | 27,502,741 | D | D |
| 03 Mar, 2026 | Jay Leveton | Class A Common Stock | D | 11,855 | $0.00 | 2,681,865 | D | D |