MLP K-1 Release Dates by Partnership

"Not yet announced" means the issuer has published nothing for this season. Antero Midstream (AM) converted to a corporation in 2019 and issues a 1099-DIV instead; its page explains what changed.

Several MLPs now also issue Schedule K-3 (Partner's Share of Income from International Transactions). K-3s are typically available later — often May or June. If your K-1 has Box 16 checked, a K-3 is coming.

For most domestic individual investors, the K-3 information is either already reported on your K-1 or doesn't apply to you. If your MLP is a U.S. midstream company and the K-3 amounts are zero or immaterial, you can generally disregard it. Consult your tax software or advisor if you're unsure.

Your broker's cost basis is almost certainly wrong for your MLP position. Brokers never see your K-1, so they never adjust for distributions, income allocations, or liability changes — and the gap compounds every year.

Need help reading your K-1? See the line-by-line worksheet guide with a filled EPD example mapping every box to the IRS worksheet.

K-1s can arrive as late as mid-March or later — that's normal. If your K-1 hasn't arrived by early April, file Form 4868 for an automatic six-month extension, pushing your deadline to October 15. You don't need a reason.

Check online before waiting for the mail. Visit the Tax Package Support URL for your MLP (see the table above). The online version is usually available before mailed copies arrive. You'll need to register with your SSN and the MLP's EIN.

For the full walkthrough — including estimated tax payment calculations and safe harbor rules — see the filing extension guide for late K-1s.

When your K-1 package arrives — whether downloaded online or received by mail — it contains several documents. Here's what to expect and what each piece is for:

The IRS requires partnerships to furnish K-1s to partners by March 15 (the 15th day of the third month after the partnership's year end). Most large MLPs meet or come close to that deadline. Last season, in the order the packages were released:

• USA Compression Partners (USAC): released February 20, 2026.
• Enterprise Products Partners (EPD): released March 3, 2026.
• Natural Resource Partners (NRP): released March 5, 2026.
• Cheniere Energy Partners (CQP): released March 6, 2026.
• Delek Logistics Partners (DKL): released March 6, 2026.
• Western Midstream Partners (WES): released March 11, 2026.
• Energy Transfer LP (ET): released March 13, 2026.
• MPLX LP (MPLX): released March 17, 2026.

Merger-affected K-1s sometimes arrive later than usual, with supplemental documentation. If you own multiple MLPs, the last K-1 to arrive determines when you can file; most experienced MLP investors file extensions by default.