I received a 1099-B for Solventum stock after it was spun off from 3M. There is no cost basis listed. Should the cost basis & purchase date I enter be for the 3M stock?

This is on the 1099-B: "Box 5: Non-Covered Securities Transactions for which basis is not reported to the IRS and for which short-term or long-term determination is unknown by EQ Shareowner Services. You must determine short-term or long-term based on your records and report on Form 8949, Part I with Box B checked, or on Form 8949, Part II, with Box E checked, as appropriate." I've had the 3M stock since 10/6/2000 = long-term for 3M. And I know the 3M cost basis. Are these (3M info) what I enter for the 1099-B?