NBP
insider transactionsNovaBridge Biosciences — 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).
Net shares · 90d
+205.1K
230.0K buy · 24.9K sell
Net value · 90d
$520.9K
$577.3K in · $56.4K out
Sentiment · 90d
Net buying
91% buying · 9% selling
Open-market trades · 90d
3
230.0K buy · 24.9K 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
-
Sell·S
SVP, Clinical Development
$13.8K
3.5K sh · $3.94
Own -1%
-
Exercise·M
SVP, Clinical Development
$0
4.1K sh
Own +14%
-
Exercise·M
SVP, Clinical Development
—
9.4K sh
Own +3%
-
Sell·S
Chief Business Development Of…
$42.6K
21.4K sh · $1.99
Own -38%
-
Buy·P
President and Chief Commercia…
$577.3K
230.0K sh · $2.51
Own New
| Date▾ | Insider | Type | Shares | Value |
|---|---|---|---|---|
| Jun 1, 2026 | Cong Claire Xu | Sell S | 3.5K | $13.8K |
| May 30, 2026 | Cong Claire Xu | Exercise M | 4.1K | $0 |
| May 30, 2026 | Cong Claire Xu | Exercise M | 9.4K | — |
| May 14, 2026 | Sean Wuxiong Cao | Sell S | 21.4K | $42.6K |
| Apr 24, 2026 | Mark Arnold Hagler KEY | Buy P | 230.0K | $577.3K |
About NBP insider trading
This page tracks insider transactions for NovaBridge Biosciences (NBP) 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.