ISR
insider transactionsIsoray, Inc. — buys & sells by directors, officers and 10% owners A shareholder owning more than 10% of the company. Must report trades, but usually a weaker signal than an officer or director. (SEC Form 4).
Cluster buy signal: Multiple insiders at the same company buying around the same time — often a stronger signal than a single buy. 2 different insiders made open-market purchases in the last 365 days, totalling $42.3K.
Net shares · 365d
+20.5K
20.5K buy · 0 sell
Net value · 365d
$42.3K
$42.3K in · $0 out
Sentiment · 365d
Net buying
100% buying · 0% selling
Open-market trades · 365d
2
20.5K buy · 0 sell
Net buy / sell volume
Not enough data to chart yet.
Tap or hover the chart for daily net volume. Green = net buying, red = net selling.
All transactions
-
Grant·A
Chief Medical Officer
$0
150.0K sh
Own New
-
Grant·A
Director
$0
50.0K sh
Own New
-
Grant·A
Director
$0
50.0K sh
Own New
-
Grant·A
Director
$0
50.0K sh
Own New
-
Grant·A
Spoor Johan M. KEY
Chief Executive Officer
$0
735.0K sh
Own New
-
Grant·A
Director
$0
50.0K sh
Own New
-
Grant·A
Director
$0
50.0K sh
Own New
-
Grant·A
Chief Accounting Officer
$0
90.0K sh
Own New
-
Buy·P
Chief Accounting Officer
$22.3K
11.0K sh · $2.03
Own +23%
-
Buy·P
Director
$19.9K
9.5K sh · $2.10
Own +2595%
-
Grant·A
Sendek Joel KEY
Chief Financial Officer
$0
600.0K sh
Own New
-
Grant·A
Director
$0
75.0K sh
Own New
| Date▾ | Insider | Type | Shares | Value |
|---|---|---|---|---|
| Mar 2, 2026 | Puhlmann Markus | Grant A | 150.0K | $0 |
| Mar 2, 2026 | Williamson Robert F III | Grant A | 50.0K | $0 |
| Mar 2, 2026 | HENSON HEIDI | Grant A | 50.0K | $0 |
| Mar 2, 2026 | Martinez Maria E | Grant A | 50.0K | $0 |
| Mar 2, 2026 | Spoor Johan M. KEY | Grant A | 735.0K | $0 |
| Mar 2, 2026 | Woods Lori A | Grant A | 50.0K | $0 |
| Mar 2, 2026 | Morich Frank | Grant A | 50.0K | $0 |
| Mar 2, 2026 | Hunt Jonathan Robert | Grant A | 90.0K | $0 |
| Nov 13, 2025 | Hunt Jonathan Robert | Buy P | 11.0K | $22.3K |
| Nov 12, 2025 | Williamson Robert F III | Buy P | 9.5K | $19.9K |
| Sep 4, 2025 | Sendek Joel KEY | Grant A | 600.0K | $0 |
| Sep 3, 2025 | Martinez Maria E | Grant A | 75.0K | $0 |
About ISR insider trading
This page tracks insider transactions for Isoray, Inc. (ISR) reported to the U.S. Securities and Exchange Commission on Form 4. Corporate insiders — directors, executive officers and beneficial owners of more than 10% of the stock — must disclose their trades within two business days. Open-market purchases (code P) and sales (code S) made at the insider's discretion are the most-watched opportunistic signals, while awards (A), option exercises (M) and tax-withholding (F) reflect compensation rather than conviction. Trades marked 10b5-1 were made under a pre-arranged plan and are considered routine. A cluster buy — several insiders buying within a short window — is historically a stronger bullish indicator than any single trade.