# ISORAY INC (CATXXXXX)

> Institutional ownership reported to the SEC as of Q2 2026, from Form 13F filings. Source: https://holderbook.com/stocks/CATXXXXX/

- Reporting holders: 2
- Reported value: $907.5K
- Held through calls: 0.0%
- Held through puts: 0.0%

A 13F reports long US equity positions only. Shorts, bonds, foreign listings and cash are not visible here, and positions are disclosed up to 45 days after the quarter ends.

## Largest holders

| Manager | Value | Shares | Share of their book | Quarters held |
|---|---|---|---|---|
| [PORTLAND INVESTMENT COUNSEL INC.](https://holderbook.com/funds/1081668-portland-investment-counsel-inc/) | $852.5K | 250,000 | 0.2% | 11 |
| [VESTOR CAPITAL, LLC](https://holderbook.com/funds/1132699-vestor-capital-llc/) | $55.0K | 56 | 0.0% | 6 |

## Quarter by quarter

| Quarter | Holders | Reported value |
|---|---|---|
| Q2 2026 | 2 | $907.5K |
| Q1 2026 | 2 | $5.6M |
| Q4 2025 | 2 | $3.4M |
| Q3 2025 | 2 | $4.2M |
| Q2 2025 | 2 | $1.1M |
| Q1 2025 | 2 | $2.5M |
| Q4 2024 | 1 | $478.5K |
| Q3 2024 | 1 | $934.5K |
| Q2 2024 | 2 | $735.4K |
| Q1 2024 | 101 | $299.0M |
| Q4 2023 | 50 | $14.7M |
| Q3 2023 | 49 | $10.0M |