[ad_1] <br><img src="https://i-invdn-com.investing.com/news/World_News_8_M_1440052125.jpg" /><br>Spero Therapeutics COO Timothy Keutzer sells shares for $44,097 <br>[ad_2] <br> <br> <br> <br><a href="https://www.investing.com/news/insider-trading-news/spero-therapeutics-coo-timothy-keutzer-sells-shares-for-44097-93CH-3852485" style="font-size: 12px;color:#D5DBDB">Source link </a>