ZBIO
insider transactionsZenas BioPharma, 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 90 days, totalling $4.7M.
Net shares · 90d
+252.8K
252.8K buy · 0 sell
Net value · 90d
$4.7M
$4.7M in · $0 out
Sentiment · 90d
Net buying
100% buying · 0% selling
Open-market trades · 90d
7
252.8K 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
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Grant·A
Head of Research and Developm…
$0
150.0K sh
Own New
-
Grant·A
Director
$0
18.5K sh
Own New
-
Grant·A
Director
$0
18.5K sh
Own New
-
Grant·A
Chief Executive Officer
$0
500.0K sh
Own New
-
Grant·A
Director
$0
18.5K sh
Own New
-
Grant·A
Jennifer A. Fox KEY
Chief Business Officer and Ch…
$0
125.0K sh
Own New
-
Grant·A
Joseph L Farmer KEY
President and Chief Operating…
$0
175.0K sh
Own New
-
Grant·A
Director
$0
18.5K sh
Own New
-
Grant·A
Director
$0
18.5K sh
Own New
-
Grant·A
Director
$0
135.0K sh
Own New
-
Grant·A
Director
$0
17.1K sh
Own New
-
Buy·P
Chief Executive Officer
$1.0M
60.0K sh · $16.88
Own +162%
-
Buy·P
Chief Executive Officer
$616.7K
35.0K sh · $17.62
Own +2%
-
Buy·P
Chief Executive Officer
$450.5K
25.0K sh · $18.02
Own +1%
-
Buy·P
Director
$70.2K
3.8K sh · $18.63
Own +1%
-
Buy·P
Chief Executive Officer
$656.5K
34.0K sh · $19.31
Own +2%
-
Buy·P
Director
$1.5M
75.0K sh · $20.00
Own +22%
-
Buy·P
Chief Executive Officer
$364.6K
20.0K sh · $18.23
Own +1%
| Date▾ | Insider | Type | Shares | Value |
|---|---|---|---|---|
| Jun 15, 2026 | Lisa Von Moltke | Grant A | 150.0K | $0 |
| Jun 15, 2026 | John J Orloff | Grant A | 18.5K | $0 |
| Jun 15, 2026 | Jason Raleigh Nunn | Grant A | 18.5K | $0 |
| Jun 15, 2026 | Leon O Moulder JR KEY | Grant A | 500.0K | $0 |
| Jun 15, 2026 | Hongbo Lu | Grant A | 18.5K | $0 |
| Jun 15, 2026 | Jennifer A. Fox KEY | Grant A | 125.0K | $0 |
| Jun 15, 2026 | Joseph L Farmer KEY | Grant A | 175.0K | $0 |
| Jun 15, 2026 | Patrick G Enright | Grant A | 18.5K | $0 |
| Jun 15, 2026 | Patricia L Allen | Grant A | 18.5K | $0 |
| May 28, 2026 | Jennifer A. Fox | Grant A | 135.0K | $0 |
| May 21, 2026 | Patrick G Enright | Grant A | 17.1K | $0 |
| May 18, 2026 | Leon O Moulder JR KEY | Buy P | 60.0K | $1.0M |
| Apr 29, 2026 | Leon O Moulder JR KEY | Buy P | 35.0K | $616.7K |
| Apr 28, 2026 | Leon O Moulder JR KEY | Buy P | 25.0K | $450.5K |
| Mar 31, 2026 | Hongbo Lu | Buy P | 3.8K | $70.2K |
| Mar 31, 2026 | Leon O Moulder JR KEY | Buy P | 34.0K | $656.5K |
| Mar 31, 2026 | Hongbo Lu | Buy P | 75.0K | $1.5M |
| Mar 30, 2026 | Leon O Moulder JR KEY | Buy P | 20.0K | $364.6K |
About ZBIO insider trading
This page tracks insider transactions for Zenas BioPharma, Inc. (ZBIO) 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.