# clm_6F9DC66DA887

subject: Arm Holdings (/record/arm.md)  
predicate: chair  
value: Masayoshi Son  
valid_from: 2018-03-01  
valid_to: null  
published: no source on record carries a date  
recorded: 2026-11-04  
confidence: 0.95  
status: valid  
assertable: true  
superseded_by: null  
last_updated: 2026-11-04  
checked: 2026-11-04 · its source page states the value and the date  

> Masayoshi Son has served as a Director and Chairman of our Board of Directors since March 2018.

What https://www.sec.gov/Archives/edgar/data/1973239/000197323926000097/arm-20260331.htm says, word for word.

## Sources

- https://www.sec.gov/Archives/edgar/data/1973239/000197323926000097/arm-20260331.htm (primary)

---

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