IMLPX Performance — MainGate MLP Fund, Class I
Data updated: 2026-07-24
IMLPX returned +17.42% year to date and +20.87% over one year to May 2026. Annualised returns are +24.55% over 3 years and +22.28% over 5 years. The fund trailed its Energy Equity category average: $100 invested three years ago grew to $193, against $195 for the category, and to $121 over one year, against $134. Volatility over the past three years was 14.52% a year. In the 12 months to May 2026 the fund lost a net $84.3M, and assets reached $837.81M.
IMLPX Growth of $100
What $100 invested in MainGate MLP Fund grew to, compounded from monthly returns reported on SEC Form N-PORT, against the Energy Equity category average over the same months.
| Period | IMLPX | Category average |
|---|---|---|
| 1 year (Jun 2025 – May 2026) | $121 | $134 |
| 3 years (Jun 2023 – May 2026) | $193 | $195 |
| 5 years (Jun 2021 – May 2026) | $273 | $274 |
| Since data start (Sep 2019 – May 2026) | $270 | $307 |
IMLPX Trailing Returns
Total returns to May 2026, from SEC N-PORT.
| Period | Total return |
|---|---|
| YTD | +17.42% |
| 1 year | +20.87% |
| 3 years (annualised) | +24.55% |
| 5 years (annualised) | +22.28% |
IMLPX Annual Returns
Calendar-year total returns of MainGate MLP Fund, compounded from monthly SEC N-PORT returns. Partial years show the months covered.
| Year | Total return |
|---|---|
| 2026 (Jan–May) | +17.42% |
| 2025 | +2.74% |
| 2024 | +34.79% |
| 2023 | +20.26% |
| 2022 | +33.56% |
| 2021 | +44.14% |
| 2020 | −28.06% |
| 2019 (Sep–Dec) | −0.30% |
IMLPX 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 | +7.0% | +7.8% | +3.5% | +2.0% | −3.5% | — | — | — | — | — | — | — |
| 2025 | +5.0% | +1.7% | +0.1% | −8.0% | +1.5% | +3.5% | −0.1% | −0.6% | −0.9% | −3.6% | +4.9% | −0.1% |
| 2024 | +0.9% | +5.2% | +6.3% | 0.0% | +1.4% | +4.3% | +1.6% | +2.4% | −0.2% | +2.4% | +14.2% | −7.0% |
| 2023 | +5.5% | −1.7% | −1.0% | +1.6% | −3.0% | +5.7% | +6.7% | +1.4% | +0.9% | −0.1% | +5.5% | −2.2% |
| 2022 | +11.4% | +5.9% | +4.3% | −0.8% | +7.0% | −14.5% | +12.6% | +3.2% | −8.8% | +15.1% | +2.2% | −4.1% |
| 2021 | +5.4% | +6.3% | +5.7% | +7.4% | +8.3% | +7.5% | −6.8% | −2.0% | +5.1% | +6.0% | −7.2% | +3.2% |
| 2020 | −7.9% | −12.8% | −42.0% | +40.8% | +7.8% | −5.6% | −4.0% | −0.5% | −13.0% | +3.5% | +22.7% | +2.2% |
| 2019 | — | — | — | — | — | — | — | — | +2.6% | −6.6% | −5.4% | +10.0% |
IMLPX Risk
Risk measures from monthly returns over Jun 2023 – May 2026.
- 3-year volatility (annualised): 14.52%
- 3-year Sharpe ratio: 1.38 (vs 4.5% risk-free rate)
- Best month: +14.20% (Nov 2024)
- Worst month: −7.99% (Apr 2025)
IMLPX Fund Flows
Monthly money in and out of MainGate MLP Fund, from SEC Form N-PORT.
- 12-month net flow: −$84.3M
- 12-month gross sales (incl. reinvestments): $94.8M
- Sales ÷ redemptions: 0.53×
| Month | Sales | Redemptions | Net flow |
|---|---|---|---|
| May 2026 | $7.2M | $7.5M | −$340K |
| Apr 2026 | $17.5M | $12.5M | $5.1M |
| Mar 2026 | $6.0M | $12.2M | −$6.2M |
| Feb 2026 | $7.2M | $16.8M | −$9.6M |
| Jan 2026 | $13.5M | $17.4M | −$3.9M |
| Dec 2025 | $3.2M | $25.5M | −$22.4M |
| Nov 2025 | $2.6M | $9.9M | −$7.3M |
| Oct 2025 | $13.9M | $10.8M | $3.2M |
| Sep 2025 | $3.5M | $35.5M | −$32.1M |
| Aug 2025 | $3.6M | $11.2M | −$7.6M |
| Jul 2025 | $11.5M | $11.6M | −$129K |
| Jun 2025 | $5.1M | $8.1M | −$3.0M |
IMLPX Assets Under Management
Net assets of MainGate MLP Fund by report date, from SEC N-PORT filings.
| Report date | Net assets |
|---|---|
| 2026-05-31 | $837.81M |
| 2026-02-28 | $834.71M |
| 2025-11-30 | $768.93M |
| 2025-08-31 | $813.89M |
| 2025-05-31 | $811.21M |
| 2025-02-28 | $888.77M |
| 2024-11-30 | $932.55M |
| 2024-08-31 | $813.55M |
| 2024-05-31 | $763.01M |
| 2024-02-29 | $787.57M |
| 2023-11-30 | $797.53M |
| 2023-08-31 | $771.96M |
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.