How to figure "Date Acquired" and "Cost Basis" on stock that "Spun Off" shares before undergoing a reverse split? Fractional shares received were liquidated. 1099-B

[istotten]

DWDP spun off shares of DOW on 4/2/2019 and shares of CTVA on 6/3/2019 before undergoing a reverse split to shares of DD on 6/3/2019. DWDP shareholders received 1 share of DOW, CTVA, and DD for every 3 shares of DWDP held at the time of each corparate action's record date. Any fractional shares of DOW, CTVA, or DD received as a result of these transactions were liquidated. Mine were liquidated.

[Critter]

If your broker cannot/will not help you then use the info on the DOW site :  https://www.investors.dupont.com/investors/dupont-investors/default.aspx

[istotten]

Thank You!