Company: DAWN
Filing Date: 2025-02-25
Form Type: 10-K
Source: 0000950170-25-026654
Chunk: 362

Company: Day One Biopharmaceuticals, Inc.
Filing Date: 2025-02-25
Form: 10-K
Item: Item 9B
Chunk 362
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 be sold to satisfy the tax withholding obligations. The Bender Rule 10b5-1 Plan expires on February 28, 2026.

On November 4, 2024, Samuel Blackman, our former Head of Research & Development, entered into a pre-arranged written stock sale plan in accordance with Rule 10b5-1 (the “Blackman Rule 10b5-1 Plan”) under the Exchange Act for the sale of shares of our common stock. The Blackman Rule 10b5-1 Plan was entered into during an open trading window in accordance with our policies regarding transactions in our securities and is intended to satisfy the affirmative defense of Rule 10b5-1(c) under the Exchange Act. The Blackman Rule 10b5-1 Plan provides for the potential sale of shares of our common stock, including upon the vesting and settlement of restricted stock units, so long as the market price of our common stock is higher than certain minimum threshold prices specified in the Blackman Rule 10b5-1 Plan, between March 7, 2025 and January 31, 2026. As such, for purposes of this disclosure, the aggregate number of shares of common stock available for sale is approximately 1,300,000. The Blackman Rule 10b5-1 Plan expires on January 31, 2026.

On November 14, 2024, Charles N. York II, our Chief Operating and Financial Officer, entered into a pre-arranged written stock sale plan in accordance with Rule 10b5-1 (the “York Rule 10b5-1 Plan”) under the Exchange Act for the sale of shares of our common stock. The York Rule 10b5-1 Plan was entered into during an open trading window in accordance with our policies regarding transactions in our securities and is intended to satisfy the affirmative defense of Rule 10b5-1(c) under the Exchange Act. The York Rule 10b5-1 Plan provides for the potential sale of shares of our common stock, including upon the vesting and settlement of restricted stock units/vesting and exercise of stock options, so long as the market price of our common stock is higher than certain minimum threshold prices specified in the York Rule 10b5-1 Plan, between February 25, 2025 and February 18, 2026. The aggregate number of shares of common stock that will be available for sale under the York Rule