1.

Oncolix 2007

2.

OncoTAb 2011

3.

OncoTartis 2011

4.

OncoVista Innovative Therapies 2004

5.

One Heart World Wide 2004

6.

OneLife.me 2014-03-01

7.

ONO Labs GmbH 2017-01-01

8.

Open Source Health 2013

9.

OpenTeleHealth 2015-01-01

10.

Opionato 2016

11.

OPTE 2020-01-01

12.

Options for Pregnancy 1982-01-16

13.

Opus Bio

14.

Organic Conceptions 2015

15.

Oshun Medical 2020-08-01

16.

OTraces

17.

Oula Health 2019

18.

OvAge 2014

19.

OvaGene Oncology 2010

20.

OvaPal 2013-07-26

21.

Ovarian Cyst Experts 2010-01-14

22.

Ovascience 2011-01-01

23.

Ovatemp 2014

24.

Ovation Diagnostics 2014

25.

Ovia Health 2011