GIMFX Performance — GMO Implementation Fund, Core Class
Data updated: 2026-07-29
GIMFX returned +13.44% year to date and +32.27% over one year to May 2026. Over one year the fund beat its Global Mid-Cap Blend category average: $100 grew to $132, against $125 for the category. Volatility over the past 12 months was 8.93% a year. In the 12 months to May 2026 the fund lost a net $126.1M, and assets reached $2.33B.
GIMFX Growth of $100
What $100 invested in GMO Implementation Fund grew to, compounded from monthly returns reported on SEC Form N-PORT, against the Global Mid-Cap Blend category average over the same months.
| Period | GIMFX | Category average |
|---|---|---|
| 1 year (Jun 2025 – May 2026) | $132 | $125 |
| 3 years (Jun 2023 – May 2026) | $169 | $157 |
| 5 years (Jun 2021 – May 2026) | $162 | $152 |
| Since data start (Sep 2019 – May 2026) | $178 | $203 |
GIMFX Trailing Returns
Total returns to May 2026, from SEC N-PORT.
| Period | Total return |
|---|---|
| YTD | +13.44% |
| 1 year | +32.27% |
3- and 5-year figures withheld: cannot be verified.
GIMFX Annual Returns
Calendar-year total returns of GMO Implementation Fund, compounded from monthly SEC N-PORT returns. Partial years show the months covered.
| Year | Total return |
|---|---|
| 2026 (Jan–May) | +13.44% |
| 2025 | +25.36% |
| 2024 | +5.01% |
| 2023 | +14.74% |
| 2022 | −1.21% |
| 2021 | +4.06% |
| 2020 | −7.25% |
| 2019 (Sep–Dec) | +8.91% |
GIMFX 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 | +4.8% | +5.8% | −4.2% | +2.8% | +3.9% | — | — | — | — | — | — | — |
| 2025 | +1.5% | +1.8% | +1.6% | +0.6% | +1.8% | +2.8% | +0.6% | +4.5% | +1.4% | +1.3% | +2.7% | +2.2% |
| 2024 | −0.2% | +0.6% | +2.9% | −1.1% | +3.3% | −1.5% | +2.8% | +0.6% | +0.4% | −3.5% | −0.1% | +1.0% |
| 2023 | +4.8% | −1.4% | −0.4% | +1.6% | −3.2% | +4.2% | +3.6% | −1.7% | +0.3% | −2.5% | +4.2% | +4.7% |
| 2022 | +3.0% | −2.4% | −2.2% | −0.2% | +2.1% | −5.3% | +0.9% | −0.7% | −4.2% | +2.1% | +6.9% | −0.7% |
| 2021 | +0.8% | +1.8% | +3.1% | +0.1% | +2.7% | −2.2% | −2.1% | +0.4% | −0.3% | −1.6% | −2.0% | +3.4% |
| 2020 | −3.0% | −3.8% | −12.2% | +7.2% | −1.8% | +0.7% | +2.8% | −0.7% | −0.6% | +0.3% | +3.1% | +1.8% |
| 2019 | — | — | — | — | — | — | — | — | +2.1% | +2.2% | +0.5% | +3.9% |
GIMFX Risk
Risk measures from monthly returns over Jun 2025 – May 2026.
- 1-year volatility (annualised): 8.93%
- Best month: +5.79% (Feb 2026)
- Worst month: −4.18% (Mar 2026)
GIMFX Fund Flows
Monthly money in and out of GMO Implementation Fund, from SEC Form N-PORT.
- 12-month net flow: −$126.1M
- 12-month gross sales (incl. reinvestments): $179.2M
- Sales ÷ redemptions: 0.59×
| Month | Sales | Redemptions | Net flow |
|---|---|---|---|
| May 2026 | $0 | $10.3M | −$10.3M |
| Apr 2026 | $1.2M | $7.1M | −$5.9M |
| Mar 2026 | $3.3M | $7.6M | −$4.3M |
| Feb 2026 | $5.5M | $46.4M | −$40.9M |
| Jan 2026 | $3.0M | $23.8M | −$20.8M |
| Dec 2025 | $72.9M | $83.1M | −$10.2M |
| Nov 2025 | $56.0M | $23.0M | $33.0M |
| Oct 2025 | $0 | $7.9M | −$7.9M |
| Sep 2025 | $11.2M | $25.4M | −$14.2M |
| Aug 2025 | $4.8M | $15.4M | −$10.6M |
| Jul 2025 | $16.9M | $34.8M | −$17.9M |
| Jun 2025 | $4.5M | $20.7M | −$16.2M |
GIMFX Assets Under Management
Net assets of GMO Implementation Fund by report date, from SEC N-PORT filings.
| Report date | Net assets |
|---|---|
| 2026-05-31 | $2.33B |
| 2026-02-28 | $2.30B |
| 2025-11-30 | $2.17B |
| 2025-08-31 | $2.04B |
| 2025-05-31 | $1.95B |
| 2025-02-28 | $1.99B |
| 2024-11-30 | $2.33B |
| 2024-08-31 | $2.46B |
| 2024-05-31 | $2.49B |
| 2024-02-29 | $3.23B |
| 2023-11-30 | $3.56B |
| 2023-08-31 | $3.62B |
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.