Grigorios Siokas, the Chief Executive Officer of $COSM, bought 61,614 shares of the company on 11-19-2025 for an estimated $39,999. This trade was reported by Quiver Quantitative using data from a recent SEC filing. This increased their holdings of this class of stock by approximately 1.0%. Following this trade, they now own 6,220,498 shares of this class of $COSM stock.
$COSM Insider Trading Activity
$COSM insiders have traded $COSM stock on the open market 3 times in the past 6 months. Of those trades, 3 have been purchases and 0 have been sales.
Here’s a breakdown of recent trading of $COSM stock by insiders over the last 6 months:
- GRIGORIOS SIOKAS (Chief Executive Officer) has made 3 purchases buying 237,443 shares for an estimated $118,016 and 0 sales.
To track insider transactions, check out Quiver Quantitative's insider trading dashboard.
$COSM Hedge Fund Activity
We have seen 13 institutional investors add shares of $COSM stock to their portfolio, and 14 decrease their positions in their most recent quarter.
Here are some of the largest recent moves:
- ARMISTICE CAPITAL, LLC removed 1,917,710 shares (-100.0%) from their portfolio in Q2 2025, for an estimated $805,438
- CITADEL ADVISORS LLC added 128,776 shares (+133.1%) to their portfolio in Q3 2025, for an estimated $142,941
- VANGUARD GROUP INC added 100,908 shares (+74.8%) to their portfolio in Q3 2025, for an estimated $112,007
- RENAISSANCE TECHNOLOGIES LLC added 92,800 shares (+inf%) to their portfolio in Q3 2025, for an estimated $103,008
- VIRTU FINANCIAL LLC removed 87,515 shares (-83.8%) from their portfolio in Q3 2025, for an estimated $97,141
- UBS GROUP AG removed 62,161 shares (-99.7%) from their portfolio in Q3 2025, for an estimated $68,998
- SLT HOLDINGS LLC removed 42,500 shares (-100.0%) from their portfolio in Q2 2025, for an estimated $17,850
To track hedge funds' stock portfolios, check out Quiver Quantitative's institutional holdings dashboard.
This article is not financial advice. See Quiver Quantitative's disclaimers for more information.
