Paul Isaac's Arbiter Partners Capital Management increased its Stereotaxis Inc (STXS) position by 100% in 2026 Q2, according to the 13F-HR/A filed with the SEC on September 15, 2026. The stake went from 2.88M to 5.77M shares, worth about $9.9M, and from 3.6% to 2.7% of the reported portfolio.
What did the 2026 Q2 filing report for STXS?
As of June 30, 2026, from the 13F-HR/A filed September 15, 2026.
| Before | After | |
|---|---|---|
| Shares | 2.88M | 5.77M |
| Shares added | +2.88M (100%) | |
| Reported value | $5.3M | $9.9M |
| Portfolio weight | 3.6% | 2.7% |
| Rank in portfolio | 11th of 42 |
How much did Paul Isaac add to STXS?
Paul Isaac added 2.88M shares of STXS during 2026 Q2, taking the stake from 2.88M to 5.77M. The reported value of the position rose by about $4.6M, from about $5.3M to about $9.9M.
Where does STXS sit in the Paul Isaac portfolio?
STXS ranks 11th of 42 stock positions in the Paul Isaac portfolio at 2.7%, about the fund's average stock position of 2%. The largest stock position is GRAL at 38.42%. Next come GEF-B at 9.86% and CRBG at 6.19%. The three largest stocks together are 54.47% of the book. The STXS addition was the 13th largest of the quarter's 45 position changes by percent change to portfolio. Across the 2026 Q2 portfolio, Paul Isaac reported 42 stock positions, with 5 opened and 3 closed. The total portfolio value is about $367.5M, up 149% from the prior quarter.
How long has Paul Isaac held STXS?
Paul Isaac first reported STXS in the quarter ended September 30, 2019. The weight peaked at 19.63% in 2019 Q4. The share count had been unchanged the quarter before. Every reported trade is on the Paul Isaac STXS trade history page.
FAQ
How many STXS shares did Paul Isaac buy in 2026 Q2?
Paul Isaac added 2.88M shares of STXS, a 100% increase, to 5.77M shares.
What is the STXS position of Paul Isaac worth now?
The STXS position of Paul Isaac is worth about $9.9M at June 30, 2026 prices, 2.7% of the portfolio.
Is STXS a top holding of Paul Isaac?
STXS ranks 11th of 42 stock positions in the Paul Isaac portfolio, at 2.7%.