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Billionaire Index

A daily ranking of the world's richest people

Last updated: November 11, 2026 · $11.70T tracked

Methodology

No. 380United States

Carl Cook

Medical devices · Bloomington, Indiana

Net worth

$9.6B

Today

$00.00%

Past month

+$758M+8.62%

As of Nov 11, 2026, 1:50 PM EST

Carl Cook took over as CEO of his parents' medical device manufacturer, Cook Group, when his father Bill died in 2011. The $2.7 billion (sales) company sold one of its subsidiaries Cook Pharmica to drug delivery technology company Catalent for $950 million in 2017. Cook's parents started the business in their Bloomington, Indiana apartment in 1963. Cook is also the president of a Cook Group life sciences division called Cook MyoSite, which is developing a cell therapy to treat urinary incontinence.

Net worth over time

+8.62%+$758M over the past month
$10B$9B$9B
Oct 12Nov 11

Principal holdings

1 positions
CompanyShareValue

Private holdings

100.0%$9.6B

Also known for

  • Cook's father, Bill, sold medical supplies in Chicago, but he hated the city, so he packed up the family and moved to Indiana.
  • With $1,500, Bill Cook bought a soldering iron, a blowtorch and plastic tubing and made then-new cardiovascular catheters.