Alfonso Tomas "Atom" Pagaduan Araullo (Tagalog: [ʔaˈɾaʊljɔ]; born October 19, 1982) is a Filipino broadcast journalist and television presenter.

He currently hosts documentary programs such as The Atom Araullo Specials and I-Witness, and is serving as the anchor of newscast State of the Nation.

He also used to host the Studio 23 morning show Breakfast, The National Quiz Bee, Probe Media Foundation Inc.'s Kabataan Xpress, Basta Sports and Kalye: Mga Kwento ng Lansangan with Anthony Taberna and Sol Aragones.

[citation needed] Araullo started his news-reporting career with GMA Network where he featured in the "ATOMic Sports" segment of 24 Oras.

[16] In January 2021, Araullo is chosen to take over along with Maki Pulido as the anchors of GMA News TV (later GTV) newscast State of the Nation, replacing Jessica Soho who decided to resign at the end of 2020.

[17] In December 2024, the Quezon City Regional Trial Court promulgated a P2-million fine judgment against Lorraine Badoy-Partosa and Jeffrey "Ka Eric" Celiz for red-baiting Araullo.