What is Welltower Cash, Cash Equivalents, Marketable Securities? Welltower‘s quarterly cash, cash equivalents, marketable securities increased from Dec. 2023 ($1,993.65 Mil) to Mar. 2024 ($2,388.49 Mil) and increased from Mar. 2024 ($2,388.49 Mil) to Jun. 2024 ($2,776.63 Mil). Welltower‘s annual cash, cash equivalents, marketable securities increased from Dec. 2021 ($269.27 Mil) to Dec. 2022 ($631.68