X0708 D/A LIVE 0001137293 CHEVRON PHILLIPS CHEMICAL CO LP 9500 LAKESIDE BLVD. THE WOODLANDS TX TEXAS 77381 8328134100 DELAWARE None None Limited Partnership true Maricela G. Caballero c/o Chevron Phillips Chemical Company LP 9500 Lakeside Blvd. The Woodlands TX TEXAS 77381 Executive Officer C. Bryan Canfield c/o Chevron Phillips Chemical Company LP 9500 Lakeside Blvd. The Woodlands TX TEXAS 77381 Executive Officer Austin Knight c/o Chevron Corporation 1400 Smith Street Houston TX TEXAS 77002 Director Voting director of issuer's non-operating parent holding company (Chevron Phillips Chemical Company LLC) Darren L. Ercolani c/o Chevron Phillips Chemical Company LP 9500 Lakeside Blvd. The Woodlands TX TEXAS 77381 Executive Officer Director Non-Voting director of issuer's non-operating parent holding company (Chevron Phillips Chemical Company LLC) Richard G. Harbison c/o Phillips 66 2331 CityWest Blvd. Houston TX TEXAS 77042 Director Voting director of issuer's non-operating parent holding company (Chevron Phillips Chemical Company LLC) Timothy J. Hill c/o Chevron Phillips Chemical Company LP 9500 Lakeside Blvd. The Woodlands TX TEXAS 77381 Executive Officer Elliott W.H. Johnson c/o Chevron Phillips Chemical Company LP 9500 Lakeside Blvd. The Woodlands TX TEXAS 77381 Executive Officer Mitra Kashanchi c/o Chevron Corporation 1400 Smith Street Houston TX TEXAS 77002 Director Voting director of issuer's non-operating parent holding company (Chevron Phillips Chemical Company LLC) Allison J. Martinez c/o Chevron Phillips Chemical Company LP 9500 Lakeside Blvd. The Woodlands TX TEXAS 77381 Executive Officer Tandra C. Perkins c/o Phillips 66 2331 CityWest Blvd. Houston TX TEXAS 77042 Director Voting director of issuer's non-operating parent holding company (Chevron Phillips Chemical Company LLC) Steven T. Prusak c/o Chevron Phillips Chemical Company LP 9500 Lakeside Blvd. The Woodlands TX TEXAS 77381 Executive Officer Director Non-Voting director of issuer's non-operating parent holding company (Chevron Phillips Chemical Company LLC) Justine D. Smith c/o Chevron Phillips Chemical Company LP 9500 Lakeside Blvd. The Woodlands TX TEXAS 77381 Executive Officer Kevin M. Ristroph c/o Chevron Phillips Chemical Company LP 9500 Lakes Blvd. The Woodlands TX TEXAS 77381 Executive Officer Mark A. Hughes c/o Phillips 66 2331 CityWest Blvd. Houston TX TEXAS 77042 Director Voting director of issuer's non-operating parent holding company (Chevron Phillips Chemical Company LLC) Roderick T. Green c/o Chevron Corporation 1400 Smith Street Houston TX TEXAS 77002 Director Voting director of issuer's non-operating parent holding company (Chevron Phillips Chemical Company LLC) Other Energy Decline to Disclose 06b true 0001137293-25-000002 2010-06-30 true true Interests in the issuer's non-qualified Deferred Compensation Plan false 0 Indefinite 107471449 Indefinite Offering consists of an opportunity for executives of Chevron Phillips Chemical Company LP to defer compensation under a non-qualified plan. The total amount deferred will depend upon future compensation which has not yet been determined. false 140 0 0 43653072 true Consists of amounts deferred by executive officers since date of first sale. Any amounts payable to an executive officer would consist of compensation deferred by him or her, plus any investment gain or loss. false CHEVRON PHILLIPS CHEMICAL CO LP /s/ Maricela Caballero Maricela Caballero Senior Vice President, Human Resources 2026-06-29