GWGIX Performance — AMG GW&K Small/Mid Cap Core Fund, Class I
Data updated: 2026-08-27
GWGIX returned +20.52% year to date and +30.95% over one year to Jun 2026. Annualised returns are +14.71% over 3 years and +7.44% over 5 years. The fund beat its US Mid-Cap Blend category average: $100 invested three years ago grew to $151, against $150 for the category, and to $131 over one year, against $122. Volatility over the past three years was 17.42% a year. In the 12 months to Jun 2026 the fund lost a net $119.5M, and assets reached $823.68M.
GWGIX Growth of $100
What $100 invested in AMG GW&K Small/Mid Cap Core Fund grew to, compounded from monthly returns reported on SEC Form N-PORT, against the US Mid-Cap Blend category average over the same months.
| Period | GWGIX | Category average |
|---|---|---|
| 1 year (Jul 2025 – Jun 2026) | $131 | $122 |
| 3 years (Jul 2023 – Jun 2026) | $151 | $150 |
| 5 years (Jul 2021 – Jun 2026) | $143 | $147 |
| Since data start (Jul 2019 – Jun 2026) | $221 | $208 |
GWGIX Trailing Returns
Total returns to Jun 2026, from SEC N-PORT.
| Period | Total return |
|---|---|
| YTD | +20.52% |
| 1 year | +30.95% |
| 3 years (annualised) | +14.71% |
| 5 years (annualised) | +7.44% |
GWGIX Annual Returns
Calendar-year total returns of AMG GW&K Small/Mid Cap Core Fund, compounded from monthly SEC N-PORT returns. Partial years show the months covered.
| Year | Total return |
|---|---|
| 2026 (Jan–Jun) | +20.52% |
| 2025 | +4.58% |
| 2024 | +10.83% |
| 2023 | +14.78% |
| 2022 | −18.01% |
| 2021 | +25.92% |
| 2020 | +23.32% |
| 2019 (Jul–Dec) | +8.13% |
GWGIX Monthly Returns
Monthly total returns as reported on SEC Form N-PORT.
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | +4.9% | +4.3% | −5.4% | +8.7% | +1.2% | +5.7% | — | — | — | — | — | — |
| 2025 | +4.5% | −5.8% | −6.8% | −3.5% | +4.5% | +3.9% | +2.9% | +4.5% | −0.6% | +0.1% | +3.2% | −1.5% |
| 2024 | −1.4% | +6.7% | +3.8% | −7.0% | +2.6% | −1.2% | +6.7% | −0.1% | +0.5% | −1.5% | +10.1% | −7.3% |
| 2023 | +8.2% | −1.1% | −2.8% | −2.4% | −3.3% | +8.2% | +4.0% | −2.1% | −5.5% | −5.7% | +9.0% | +9.2% |
| 2022 | −8.7% | +0.9% | −0.7% | −7.4% | +0.2% | −7.2% | +9.3% | −4.4% | −8.4% | +9.1% | +5.6% | −5.6% |
| 2021 | −0.2% | +7.8% | +2.2% | +4.7% | −1.1% | +1.5% | +2.3% | +3.1% | −3.2% | +6.5% | −3.2% | +3.5% |
| 2020 | −1.0% | −8.4% | −16.1% | +14.1% | +8.4% | +0.3% | +6.1% | +4.1% | −3.2% | +1.9% | +13.6% | +5.4% |
| 2019 | — | — | — | — | — | — | +1.2% | −1.4% | +0.3% | +1.9% | +4.3% | +1.7% |
GWGIX Risk
Risk measures from monthly returns over Jul 2023 – Jun 2026.
- 3-year volatility (annualised): 17.42%
- 3-year Sharpe ratio: 0.59 (vs 4.5% risk-free rate)
- Best month: +10.13% (Nov 2024)
- Worst month: −7.35% (Dec 2024)
GWGIX Fund Flows
Monthly money in and out of AMG GW&K Small/Mid Cap Core Fund, from SEC Form N-PORT.
- 12-month net flow: −$119.5M
- 12-month gross sales (incl. reinvestments): $84.1M
- Sales ÷ redemptions: 0.41×
| Month | Sales | Redemptions | Net flow |
|---|---|---|---|
| Jun 2026 | $15.2M | $8.7M | $6.4M |
| May 2026 | $4.6M | $9.6M | −$4.9M |
| Apr 2026 | $3.2M | $14.1M | −$10.9M |
| Mar 2026 | $10.6M | $20.8M | −$10.1M |
| Feb 2026 | $4.9M | $9.8M | −$4.9M |
| Jan 2026 | $7.2M | $14.9M | −$7.6M |
| Dec 2025 | $25.7M | $17.6M | $8.1M |
| Nov 2025 | $2.0M | $13.9M | −$11.9M |
| Oct 2025 | $1.7M | $13.2M | −$11.5M |
| Sep 2025 | $2.4M | $14.8M | −$12.4M |
| Aug 2025 | $3.0M | $54.6M | −$51.6M |
| Jul 2025 | $3.5M | $11.7M | −$8.2M |
GWGIX Assets Under Management
Net assets of AMG GW&K Small/Mid Cap Core Fund by report date, from SEC N-PORT filings.
| Report date | Net assets |
|---|---|
| 2026-06-30 | $823.68M |
| 2026-03-31 | $717.03M |
| 2025-12-31 | $713.87M |
| 2025-09-30 | $738.01M |
| 2025-06-30 | $758.93M |
| 2025-03-31 | $743.52M |
| 2024-12-31 | $812.48M |
| 2024-09-30 | $758.13M |
| 2024-06-28 | $707.67M |
| 2024-03-28 | $731.94M |
| 2023-12-29 | $711.95M |
| 2023-09-29 | $646.09M |
For information only. Not investment advice: figures are as reported in SEC filings and may contain errors or be out of date. Past performance does not guarantee future results.