Coinbase Assets to Move Anthropic Perpetuals From ANTH to ANT Nov. 16

Coinbase Assets plans to change the benchmark for its Anthropic pre-IPO perpetual contract on Nov. 16, moving it from a company-valuation measure to a per-share price index.

The switch is scheduled for 5 a.m. ET (10:00 UTC) Monday. The current index is based on 1 billion shares; the replacement will use a base of 13.116 billion shares.

Trading will pause during the change, and Coinbase will cancel unfilled ANTH orders. Existing ANTH perpetual positions on Coinbase Markets will transfer through fee-free block trades into economically equivalent ANT positions. The migration preserves the economic value of those positions while changing the contract symbol and benchmark.

After the migration, Coinbase will delist ANTH and open trading in ANT.