Personnel: Holden Karnofsky at GiveWell (Co-founder & Co-Executive Director)

Note: The source text confirms that GiveWell was founded in 2007 and mentions it was founded by two individuals, but it does not specifically name Holden Karnofsky or confirm his role as Co-founder & Co-Executive Director. The source also does not provide any information about his end date (2014) or the specific title 'Co-Executive Director'. While the source directs readers to 'our story' and 'meet our team' pages for more information, those pages are not included in the provided excerpt. Therefore, the specific personnel record cannot be verified from this source text alone.