Not quite.

Kokotajlo quit because he didn't think OpenAI would be good stewards of AGI (non-disparagement wasn't in the picture yet). As part of his exit OpenAI asked him to sign a non-disparagement as a condition of keeping his equity. He refused and gave up his equity.

To the best of my knowledge he lost that equity permanently and no longer has any stake in OpenAI (even if this episode later led to an outcry against OpenAI causing them to remove the non-disparagement agreement from future exits).