Robert Joseph Ball, the CEO & Executive Chairman of $SI, sold 10,175 shares of the company on 09-14-2026 for an estimated $187,706. We received data on the trade from a recent SEC filing. This was a sale of approximately 2.6% of their shares of this class of stock. Following this trade, they now own 380,824 shares of this class of $SI stock.
$SI Insider Trading Activity
$SI insiders have traded $SI stock on the open market 17 times in the past 6 months. Of those trades, 0 have been purchases and 17 have been sales.
Here’s a breakdown of recent trading of $SI stock by insiders over the last 6 months:
- HEALTHCARE HOLDING B.V. GILDE has made 0 purchases and 10 sales selling 194,568 shares for an estimated $4,439,970.
- MATTHEW FRASER AHEARN (Chief Operating Officer) has made 0 purchases and 6 sales selling 42,500 shares for an estimated $839,060.
- ROBERT JOSEPH BALL (CEO & Executive Chairman) sold 10,175 shares for an estimated $187,706
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.
$SI Hedge Fund Activity
We have seen 51 institutional investors add shares of $SI stock to their portfolio, and 24 decrease their positions in their most recent quarter.
Here are some of the largest recent moves:
- KCM CAPITAL INC added 265,000 shares (+757.1%) to their portfolio in Q2 2026, for an estimated $5,374,200
- DRIEHAUS CAPITAL MANAGEMENT LLC added 253,760 shares (+inf%) to their portfolio in Q2 2026, for an estimated $5,146,252
- ALYESKA INVESTMENT GROUP, L.P. removed 232,984 shares (-100.0%) from their portfolio in Q2 2026, for an estimated $4,724,915
- PARKMAN HEALTHCARE PARTNERS LLC added 226,212 shares (+inf%) to their portfolio in Q2 2026, for an estimated $4,587,579
- SIO CAPITAL MANAGEMENT, LLC removed 210,641 shares (-100.0%) from their portfolio in Q2 2026, for an estimated $4,271,799
- MILLENNIUM MANAGEMENT LLC removed 193,942 shares (-100.0%) from their portfolio in Q2 2026, for an estimated $3,933,143
- JPMORGAN CHASE & CO added 124,437 shares (+inf%) to their portfolio in Q2 2026, for an estimated $2,523,582
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.
This article is not financial advice. See Quiver Quantitative's disclaimers for more information.
