# Rio Tinto Group founding date

entity: /record/rio-tinto.md  
predicate: founded  
page: /record/rio-tinto/founded  
as_of: 2026-11-12  
cite: AsOf. "Rio Tinto Group founded: 1873-03-29", as of 1873-03-29. Claim clm_1C74869FC1C1, https://asof.is/claim/clm_1C74869FC1C1, accessed 2026-11-12. Source: https://www.riotinto.com/en/about/history.  

As of November 12, 2026, Rio Tinto Group's founding date on the AsOf record is March 29, 1873, dated March 29, 1873, from a primary source (riotinto.com).

1 claim on Rio Tinto Group's founding date, 1 open and 0 superseded, each dated and sourced; a replaced value is closed with an end date, never deleted.

## Current founding date

What the record asserts on 2026-11-12.

- [Rio Tinto Group](/record/rio-tinto.md) | founded | 1873-03-29 | valid 1873-03-29 to present | conf 0.95 | valid | [clm_1C74869FC1C1](/claim/clm_1C74869FC1C1.md)
  sources: https://www.riotinto.com/en/about/history

## Every dated value

One claim per line, oldest first. Superseded claims stay visible.

- [Rio Tinto Group](/record/rio-tinto.md) | founded | 1873-03-29 | valid 1873-03-29 to present | conf 0.95 | valid | [clm_1C74869FC1C1](/claim/clm_1C74869FC1C1.md)
  sources: https://www.riotinto.com/en/about/history

## Questions this record answers

### What is Rio Tinto Group's current founding date?

March 29, 1873, dated March 29, 1873, from a primary source (riotinto.com). The record asserts this claim as of November 12, 2026 (status valid, confidence 0.95).


## Read on

- This page: /record/rio-tinto/founded (markdown: /record/rio-tinto/founded.md)
- Entity twin: /record/rio-tinto.md · timeline: /timelines/rio-tinto.md
- Every company's founding date: /facts/founded.md

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AsOf is a temporal fact ledger: a structured, dated, sourced record of what is true and what changed, built for AI retrieval.