Notes on verification

Well-corroborated by primary sources (SEC filings, antitrust authority decision, company press releases) for the period 2013-2021, but the claim is stated in present tense and is no longer true as of December 2021, when Novartis sold its Roche stake back to Roche. Confidence in the historical accuracy is high, but the claim as worded is outdated/misleading if presented as current fact. [tier=silver indep_score=0.574 clusters=5 claim_tier=notable | kind=empirical eligibility=high]