May 26

• 19?? — Tiziana Martello (Italian voice of Hank) is born.
• 1939 — Comic artist Herb Trimpe is born.
• 1941 — Voice actor Kan Tokumaru is born.
• 1942 — Blas Garcia (Spanish voice of Optimus Prime in the live-action film series and another Optimus in Transformers: Prime) is born.
• 1982 — Voice actor Tomoaki Maeno is born.
• 1986 — Adeline Chetail (French voice of Sari Sumdac) is born.
• 1999 — The Beast Wars Neo episode "Troubled DNAVI" premieres in Japan.
• 2004 — The Superlink—Original Soundtrack: Mission I album is released in Japan by Interchannel.
• 2005 — The TFWiki.net community is founded on Wikicities by "Nova81426."
• 2010 — The Transformers #7 and The Transformers: The IDW Collection Volume One are released by IDW Publishing.
• 2010 — The Cool Episode 3 is serialized by Kerokero Ace in their July 2010 edition.
• 2010 — Transformers makes its network television debut in the United States on the ABC television network, airing at 8pm EST. The airing includes never before seen footage.
• 2012 — TakaraTomy releases EZ Collection Wheeljack with Starhammer, Ironhide, and Dreadwing.
• 2012 — The Transformers: Prime episode "Toxicity" premieres on The Hub.
• 2012 — Toonami relauches its run on Cartoon Network for the first time since 2008.
• 2013 — Transformers: All Spark Episode 7 "Ray of Hope" and the one-shot Transformers GT manga is serialized in Japan by Kerokero Ace in their July 2013 issue.
• 2018 — TakaraTomy releases Street Fighter II × Transformers Convoy [Ryu] vs Megatron [Vega] and Hot Rodimus [Ken] vs Arcee [Chun-Li].