Midstream energy is back in the spotlight as Middle East supply risk reroutes capital toward pipeline cash flows, and two ETFs dominate the conversation: the Alerian MLP ETF (NYSEARCA:AMLP) and the Global X MLP & Energy Infrastructure ETF (NYSEARCA:MLPX). Both spare you a K-1 at tax time, both lean on the same toll-road business model, and both have ridden the 2026 energy rally higher. The choice is a bet on whether you want the fattest current distribution or the cleanest path to compound returns, and the gap between those outcomes is wider than most income investors realize.
What Each Fund Is Actually Betting On
AMLP holds essentially nothing but master limited partnerships. The top six positions, led by Plains All American, Sunoco, Energy Transfer, MPLX, Western Midstream, and Enterprise Products, account for 79.26% of fund assets, with 99.97% of the portfolio sitting in MLP units. To shield investors from K-1 paperwork, the fund itself is organized as a C-corporation. AMLP pays corporate income tax at the fund level on the appreciation and income its MLPs generate, and that tax accrual gets booked as a deferred liability that drags on NAV every time the underlying units rise.
MLPX takes the opposite route. By capping MLP exposure under 25%, it qualifies as a regulated investment company and avoids entity-level corporate tax entirely. The rest of the portfolio is filled with midstream C-corps: TC Energy at 9.01%, Enbridge at 8.93%, Williams Companies at 8.87%, Kinder Morgan at 7.88%, and ONEOK at 6.88%. The implicit bet is that you can capture most of the midstream cash flow story through pipeline corporations without giving up roughly two percentage points of annual return to a structural tax leak.
Where the Difference Shows Up
The tax drag shows up in the returns. Over the past five years, AMLP returned 117% while MLPX returned 210%. Stretch the window to ten years and the gap widens: AMLP gained 95% versus 470% for MLPX. Year to date in 2026, with WTI swinging from a 12-month high of $114.58 in April down to a current $80.07 per barrel, MLPX is up 27.94% against AMLP’s 18.73%. The C-corp wrapper around MLP exposure costs real money in rising markets.
The Income Trade-Off
AMLP earns its reputation as the higher payer. Its Q2 2026 distribution of $1.03 followed $1.01 in Q1, with 2025 distributions totaling $3.93. MLPX paid $0.757 in May 2026 and $0.74 in February, against 2025 quarterlies of $0.69 to $0.73. At a current price of $53.82, AMLP throws off a trailing distribution rate near 7.76%, while MLPX at $76.15 sits closer to 4.13%. That income premium is the compensation for the NAV tax drag.
The Practical Comparison
| Metric | AMLP | MLPX |
|---|---|---|
| Net assets | $12.16B | $3.48B |
| Expense ratio | 1.01% | 0.45% |
| Fund structure | C-corporation | RIC |
| MLP weight | ~100% | Under 25% |
| K-1 issued | No | No |
| 5-year total return | 117% | 210% |
The Verdict
For total-return investors, MLPX is the stronger product. It captures the midstream throughput story without the corporate-tax drag, and the ten-year return gap shows what that structural advantage compounds into. AMLP makes sense only for investors who need current income today, value the predictability of consistent quarterly distributions, and accept that NAV growth will lag in strong energy markets. If midstream units fall meaningfully, AMLP’s deferred tax liability reverses and the structural drag eases, while MLPX’s broader C-corp basket loses its tailwind. Until then, the cleaner compounder is MLPX.
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