Multiple credible and relevant reports indicate substantial USDC transactions between unidentified wallets. CoinNess, which cites Whale Alert data, logs large-scale transfers—including transactions from Binance to unknown wallets amounting to over $1.1B—demonstrating that movements exceeding $403M are plausible and documented. Additional details from Reddit's Whale Alert summaries show hundreds of millions of USDC moved between untagged wallet addresses, aligning closely with the statement's core claim. While exact figures in sources may vary, the consistency across independent data points on large USDC movements between unidentified addresses strongly supports the statement's truthfulness. No evidence suggesting contradiction or fabrication was found; minor uncertainties stem from limited direct confirmation of the exact $403M figure, but the verified scale and nature of reported transactions match the claim.