| Category | Fund Name | Class | Net Assets ($ M)* | 2024 | 2023 | 2022 |
|---|---|---|---|---|---|---|
| Large-Cap-Growth | Natixis Loomis Sayles Growth Fund + | Class A Shares | 8230 | 23.9 | 41.4 | -38.9 |
| Small-Cap-Value | Vaughan Nelson Small Cap Value Fund + | Class A Shares | 190.6 | 4.9 | 24.5 | -15.1 |
| Large-Cap-Core | Natixis Oakmark Fund + | Class A Shares | 348 | 14.4 | 26.4 | -25.8 |
| Large-Cap-Core | Natixis US Equity Opportunities Fund + | Class A Shares | 736.9 | 19.4 | 26.6 | -32.7 |
| Large-Cap-Core | Vaughan Nelson Select Fund + | Class A Shares | 370.6 | 8.9 | 22 | -17.7 |
| Real Estate-NA | AEW Global Focused Real Estate Fund + | Class A Shares | 85.2 | 3.6 | 10.4 | -27.5 |
| Multi-Cap-Core | Mirova International Sustainable Equity Fund + | Class A Shares | 9 | 6.1 | 13.2 | -27 |
| Multi-Cap-Core | Natixis Oakmark International Fund + | Class A Shares | 360.4 | -1.2 | 16.9 | -17.4 |
| Alternatives | Gateway Equity Call Premium Fund + | Class A Shares | 139.4 | 14.6 | 16.5 | -12.4 |
| Alternatives | Gateway Fund + | Class A Shares | 6300 | 12.6 | 13.6 | -12.6 |
| Large-Cap-Growth | Loomis Sayles Global Growth + | Class A Shares | 131.4 | 18.4 | 35.9 | -31.4 |
| Multi-Cap-Growth | Mirova Global Sustainable Equity + | Class A Shares | 868.9 | 15.4 | 17.9 | -25.9 |
| Alternatives | AlphaSimplex Managed Futures Strategy Fund + | Class A Shares | 2700 | -5.6 | -10.9 | 1.9 |
| Alternatives | Vaughan Nelson Mid Cap Fund + | Class A Shares | 262.3 | 16.2 | 15.9 | -13.5 |
| Large-Cap-Growth | Natixis Loomis Sayles Growth Fund | Class C Shares | 8230 | 22.9 | 38.6 | -40.9 |
| Large-Cap-Growth | Natixis Loomis Sayles Growth Fund | Class N Shares | 8230 | 24.3 | 42.9 | -37.8 |
| Large-Cap-Growth | Natixis Loomis Sayles Growth Fund | Class Y Shares | 8230 | 23.9 | 42.7 | -37.9 |
| Small-Cap-Value | Vaughan Nelson Small Cap Value Fund | Class C Shares | 190.6 | 4 | 22.8 | -23.6 |
| Small-Cap-Value | Vaughan Nelson Small Cap Value Fund | Class Y Shares | 190.6 | 4.9 | 24.5 | -14.8 |
| Small-Cap-Value | Vaughan Nelson Small Cap Value Fund | Class N Shares | 190.6 | 4.9 | 24.6 | -14.8 |
| Large-Cap-Core | Natixis Oakmark Fund | Class C Shares | 348 | 13.4 | 25 | -28.8 |
| Large-Cap-Core | Natixis Oakmark Fund | Class N Share | 348 | 14.7 | 26.8 | -25 |
| Large-Cap-Core | Natixis Oakmark Fund | Class Y Shares | 348 | 14.6 | 26.8 | -25 |
| Large-Cap-Core | Natixis US Equity Opportunities Fund | Class C Shares | 736.9 | 18.5 | 11.4 | -44.5 |
| Large-Cap-Core | Natixis US Equity Opportunities Fund | Class N Shares | 736.9 | 19.7 | 29.1 | -30.3 |
| Large-Cap-Core | Natixis US Equity Opportunities Fund | Class Y Shares | 736.9 | 20.6 | 29.1 | -30.4 |
| Large-Cap-Core | Vaughan Nelson Select Fund | Class C Shares | 370.6 | 8.2 | 21 | -18.4 |
| Large-Cap-Core | Vaughan Nelson Select Fund | Class N Shares | 370.6 | 9 | 22.1 | -17.7 |
| Large-Cap-Core | Vaughan Nelson Select Fund | Class Y Shares | 370.6 | 9.1 | 22.1 | -17.6 |
| Real Estate-NA | AEW Global Focused Real Estate Fund | Class C Shares | 85.2 | 3.5 | 10.5 | -27.5 |
| Real Estate-NA | AEW Global Focused Real Estate Fund | Class N Shares | 85.2 | 3.3 | 10 | -27.7 |
| Real Estate-NA | AEW Global Focused Real Estate Fund | Class Y Shares | 85.2 | 3.3 | 10 | -27.7 |
| Multi-Cap-Core | Mirova International Sustainable Equity Fund | Class N Shares | 9 | 6.5 | 13.1 | -26.9 |
| Multi-Cap-Core | Mirova International Sustainable Equity Fund | Class Y Shares | 9 | 6.2 | 13.1 | -26.9 |
| Multi-Cap-Core | Natixis Oakmark International Fund | Class C Shares | 360.4 | -2.4 | 17.1 | -17.2 |
| Multi-Cap-Core | Natixis Oakmark International Fund | Class N Shares | 360.4 | -1.6 | 16.9 | -17.4 |
| Multi-Cap-Core | Natixis Oakmark International Fund | Class Y Shares | 360.4 | -1.6 | 16.9 | -17.4 |
| Alternatives | Gateway Equity Call Premium Fund | Class C Shares | 139.4 | 14.1 | 16.4 | -12.4 |
| Alternatives | Gateway Equity Call Premium Fund | Class N Shares | 139.4 | 14.6 | 16.5 | -12.4 |
| Alternatives | Gateway Equity Call Premium Fund | Class Y Shares | 139.4 | 14.5 | 16.4 | -12.3 |
| Alternatives | Gateway Fund | Class C Shares | 6300 | 12.1 | 13.5 | -12.7 |
| Alternatives | Gateway Fund | Class N Shares | 6300 | 12.5 | 13.6 | -12.6 |
| Alternatives | Gateway Fund | Class Y Shares | 6300 | 12.7 | 13.6 | -12.6 |
| Large-Cap-Growth | Loomis Sayles Global Growth | Class C Shares | 131.4 | 17.6 | 34.8 | -32.2 |
| Large-Cap-Growth | Loomis Sayles Global Growth | Class N Shares | 131.4 | 20 | 36.2 | -31.2 |
| Large-Cap-Growth | Loomis Sayles Global Growth | Class Y Shares | 131.4 | 20 | 36.1 | -31.2 |
| Multi-Cap-Growth | Mirova Global Sustainable Equity | Class C Shares | 868.9 | 14.7 | 17.3 | -26.2 |
| Multi-Cap-Growth | Mirova Global Sustainable Equity | Class N Shares | 868.9 | 15.6 | 17.9 | -25.9 |
| Multi-Cap-Growth | Mirova Global Sustainable Equity | Class Y Shares | 868.9 | 15.6 | 17.9 | -25.8 |
| Alternatives | AlphaSimplex Managed Futures Strategy Fund | Class C Shares | 2700 | -5.8 | -11.2 | -0.4 |
| Alternatives | AlphaSimplex Managed Futures Strategy Fund | Class N Shares | 2700 | -4.8 | -11.2 | 2.5 |
| Alternatives | AlphaSimplex Managed Futures Strategy Fund | Class Y Shares | 2700 | -5.4 | -11.2 | 2.3 |
| Alternatives | Vaughan Nelson Mid Cap Fund | Class C Shares | 262.3 | 15.3 | 15.4 | -13.8 |
| Alternatives | Vaughan Nelson Mid Cap Fund | Class N Shares | 262.3 | 16.5 | 15.9 | -13.4 |
| Alternatives | Vaughan Nelson Mid Cap Fund | Class Y Shares | 262.3 | 16.4 | 15.9 | -13.4 |
* Net Assets include for all classes