$CTNM stock is down 29% today. Here's what we see in our data.

$CTNM stock has now fallen 29% today, according to our price data from Polygon. There has been approximately $37,837,181 of trading volume.

Here is what we see in our data on $CTNM (you can track the company live on Quiver's $CTNM stock page):

$CTNM Insider Trading Activity

$CTNM insiders have traded $CTNM stock on the open market 13 times in the past 6 months. Of those trades, 0 have been purchases and 13 have been sales.

Here’s a breakdown of recent trading of $CTNM stock by insiders over the last 6 months:

• DANIEL S. LORRAIN (Chief Scientific Officer) has made 0 purchases and 8 sales selling 46,559 shares for an estimated $720,774.
• CARMINE N. STENGONE (CEO and President) has made 0 purchases and 4 sales selling 17,500 shares for an estimated $281,250.
• TIM WATKINS (CMO & Head of Development) sold 10,833 shares for an estimated $173,590

To track insider transactions, check out Quiver Quantitative's insider trading dashboard. You can access data on insider stock transactions through the Quiver Quantitative API insider transaction endpoint.

$CTNM Hedge Fund Activity

We have seen 57 institutional investors add shares of $CTNM stock to their portfolio, and 35 decrease their positions in their most recent quarter.

Here are some of the largest recent moves:

• BAKER BROS. ADVISORS LP removed 1,420,838 shares (-100.0%) from their portfolio in Q2 2026, for an estimated $23,287,534
• BLACKROCK, INC. added 1,395,222 shares (+208.5%) to their portfolio in Q2 2026, for an estimated $22,867,688
• RA CAPITAL MANAGEMENT, L.P. removed 1,296,012 shares (-100.0%) from their portfolio in Q2 2026, for an estimated $21,241,636
• MILLENNIUM MANAGEMENT LLC removed 603,740 shares (-39.3%) from their portfolio in Q2 2026, for an estimated $9,895,298
• JONES HILL CAPITAL LP removed 513,053 shares (-100.0%) from their portfolio in Q2 2026, for an estimated $8,408,938
• GEODE CAPITAL MANAGEMENT, LLC added 411,150 shares (+145.8%) to their portfolio in Q2 2026, for an estimated $6,738,748
• ADAGE CAPITAL PARTNERS GP, L.L.C. added 328,000 shares (+inf%) to their portfolio in Q2 2026, for an estimated $5,375,920

To track hedge funds' stock portfolios, check out Quiver Quantitative's institutional holdings dashboard. You can access data on hedge funds moves and 13F filings through the Quiver Quantitative API 13F endpoint.

You can track data on $CTNM on Quiver Quantitative.

This article is not financial advice. See Quiver Quantitative's disclaimers for more information. Note that there may be inaccuracies due to mistakes in ticker-mapping, and other anomalies.