MPLX LP filed an 8-K on October 27, 2026, announcing that the board of directors of its general partner declared a quarterly cash distribution of $1.2111 per common unit for the third quarter of 2026.

Key Highlights

  • Distribution amount: $1.2111 per common unit for Q3 2026, equating to $4.84 on an annualized basis, according to the filing.
  • Increase over prior quarter: The declared amount represents a 12.5% increase, or $0.1346 per common unit, over the second quarter 2026 distribution.
  • Payment date: The distribution will be paid on November 13, 2026, the filing disclosed.
  • Record date: Common unitholders of record as of November 6, 2026 are eligible to receive the distribution.
  • Tax withholding notice: The filing provides qualified notice that 100% of distributions to non-U.S. investors is attributable to income effectively connected with a United States trade or business and is subject to federal income tax withholding at the highest applicable effective tax rate.

MPLX Q3 2026 Distribution Details and Tax Notice

According to the filing, the board of directors of the general partner of MPLX LP (NYSE:MPLX), headquartered in Findlay, Ohio, declared a quarterly cash distribution of $1.2111 per common unit for the third quarter of 2026. The company disclosed that this is equivalent to $4.84 per unit on an annualized basis. The $0.1346 per unit increase over the second quarter 2026 distribution represents a 12.5% rise, as stated in the filing.

The filing indicated the distribution is scheduled for payment on November 13, 2026, to unitholders of record as of November 6, 2026. Concurrent with the distribution announcement, the company issued a qualified tax notice directed at brokers and nominees holding MPLX units on behalf of non-U.S. investors. The notice references Treasury Regulation Section 1.1446-4(b) and (d) and Treasury Regulation Section 1.1446(f)-4(c)(2)(iii), advising that 100% of distributions to non-U.S. investors should be treated as attributable to income effectively connected with a United States trade or business.

The filing further stated that brokers and nominees should treat 100% of the distribution as being in excess of cumulative net income for withholding purposes, and that nominees, not MPLX, are treated as the withholding agents responsible for withholding on distributions received on behalf of non-U.S. investors.

What Was Disclosed

MPLX LP disclosed a Q3 2026 quarterly cash distribution of $1.2111 per common unit, a 12.5% increase over Q2 2026, payable November 13, 2026 to holders of record November 6, 2026, along with a qualified tax notice for non-U.S. investors.