Jared Isaacman, CEO of Shift4 integrated payment&nbsp;processing solutions, participated in the first private spacewalk by a group of astronauts who left a SpaceX capsule after a delay of a few hours, testing a new line of spacesuits in the company's riskiest mission yet.

Along with the billionaire entrepreneur is a retired military fighter pilot and two SpaceX employees. The four have been orbiting Earth aboard Crew Dragon since Tuesday's pre-dawn launch from Florida of the Polaris Dawn mission.

<thead><tr><th class="ticker">Ticker</th> <th class="security">Security</th> <th class="last">Last</th> <th class="change">Change</th> <th class="percent">Change %</th></tr></thead> <tbody><tr><td class="ticker"><a href="/quote?stockTicker=FOUR">FOUR</a></td> <td class="security">SHIFT4 PAYMENTS INC.</td> <td class="last">77.58</td> <td class="change pos">+1.67</td> <td class="percent pos"> +2.20% </td></tr> <tr><td colspan="5" class="sponsored-by-td"></td></tr></tbody>

<i>This is a developing story. Check back here for updates.&nbsp;</i>

<i>Reuters contributed to this report.&nbsp;</i>

{ai:summary}<p>Jared Isaacman, CEO of Shift4 Payments, took part in the first private spacewalk during the Polaris Dawn mission. He was accompanied by a retired military pilot and two SpaceX employees, testing new spacesuits after a few hours of delays.</p><p>The mission began with a pre-dawn launch from Florida, marking a significant step in private space exploration. #space</p>

Billionaire on SpaceX Polaris Dawn mission conducts first private spacewalk

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