SESN
insider transactionsSesen Bio, 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).
Net shares · 365d
-541.3K
0 buy · 541.3K sell
Net value · 365d
-$138.2K
$0 in · $138.2K out
Sentiment · 365d
Net selling
0% buying · 100% selling
Open-market trades · 365d
4
0 buy · 541.3K 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
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Exercise·M
Chief Scientific Officer
$0
57.0K sh
Own New
-
Exercise·M
Chief Scientific Officer
$6.3K
57.0K sh · $0.11
Own New
-
Sell·S
Chief Scientific Officer
$14.2K
57.0K sh · $0.25
Own -100%
-
Sell·S
Chief Scientific Officer
$31.0K
119.3K sh · $0.26
Own -100%
-
Sell·S
Chief Scientific Officer
$50.0K
200.0K sh · $0.25
Own -63%
-
Sell·S
Chief Scientific Officer
$42.9K
165.0K sh · $0.26
Own -34%
| Date▾ | Insider | Type | Shares | Value |
|---|---|---|---|---|
| Oct 7, 2025 | Klichinsky Michael | Exercise M | 57.0K | $0 |
| Oct 7, 2025 | Klichinsky Michael | Exercise M | 57.0K | $6.3K |
| Oct 7, 2025 | Klichinsky Michael | Sell S | 57.0K | $14.2K |
| Oct 3, 2025 | Klichinsky Michael | Sell S | 119.3K | $31.0K |
| Oct 2, 2025 | Klichinsky Michael | Sell S | 200.0K | $50.0K |
| Oct 1, 2025 | Klichinsky Michael | Sell S | 165.0K | $42.9K |
About SESN insider trading
This page tracks insider transactions for Sesen Bio, Inc. (SESN) 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.