Zenas BioPharma, Inc.
Net BuyingZBIO·US·🇺🇸 US
100%buys·0%sales
204 transactions$225.5MTotal buys·53 buys
$0Total sells·0 sells
2121 insiders
Last: Mar 31, 2026
| Date | Insider | Type | Value | |
|---|---|---|---|---|
| Mar 31, 26 | Lu Hongbo | Buy | $70K | |
| Mar 31, 26 | MOULDER LEON O JR | Buy | $657K | |
| Mar 31, 26 | Lu Hongbo | Buy | $1.5M | |
| Mar 31, 26 | Harwin Peter Evan | Buy | $3.0M | |
| Mar 31, 26 | Kiselak Tomas | Buy | $3.0M | |
| Mar 31, 26 | Fairmount Healthcare Fund II L.P. | Buy | $3.0M | |
| Mar 31, 26 | Fairmount Funds Management LLC | Buy | $3.0M | |
| Mar 30, 26 | MOULDER LEON O JR | Buy | $365K | |
| Oct 9, 25 | ENRIGHT PATRICK G | Buy | $250K | |
| Oct 9, 25 | ENRIGHT PATRICK G | Buy | $2.0M |
Zenas BioPharma, Inc. is seeing coordinated insider buying. 6 insiders purchased shares in the last 30 days, with total buy volume of $14.6M. Overall insider sentiment is bullish (100% purchases).
Zenas BioPharma, Inc. (ZBIO) has recorded 204 insider operations, including 53 open-market purchases ($225.5M), 0 sales ($0) and 151 other operations (stock option exercises, grants, tax dispositions, donations). The insider sentiment is bullish (100% purchases).
Zenas BioPharma, Inc. shows moderate insider activity with 4 active months out of the last 12, typical of a company whose trading windows are concentrated around financial disclosures.
Among the most active insiders are MOULDER LEON O JR (CEO), Oliveira Orlando (C SUITE) & ENRIGHT PATRICK G (BOARD MEMBER), with respectively 123, 29, 561 transactions.
Across all 204 recorded transactions, the breakdown by type is: exercise (114, 56%), buys (53, 26%), grant (37, 18%).
Data sourced from regulatory filings (SEC Form 4, AMF, BaFin, FI, and other European authorities).
Zenas BioPharma, Inc. has recorded 204 insider operations in total, including 53 open-market purchases ($225.5M), 0 sales ($0) and 151 other operations (stock option exercises, grants, tax dispositions, donations). The most recent transaction was recorded on March 31, 2026.
Insiders at Zenas BioPharma, Inc. are currently net buyers, with 100% purchases and 0% sales across all reported transactions. Total buy volume is $225.5M versus $0 in sales, indicating a bullish insider sentiment.
InsiderLens tracks 21 insiders at Zenas BioPharma, Inc. (ZBIO). MOULDER LEON O JR (CEO, 123 tx), Oliveira Orlando (C SUITE, 29 tx), ENRIGHT PATRICK G (BOARD MEMBER, 561 tx). Data is sourced from mandatory regulatory filings for persons with access to privileged information.
The insider signal for ZBIO is bullish, based on a 100% buy ratio across 53 buy and sell transactions reported to financial regulators. Transactions from C-suite executives (CEO, CFO) and board members are generally considered the most informative signals.
Insider trading data for Zenas BioPharma, Inc. comes from official regulatory filings: SEC Form 4 (United States), AMF (France), BaFin (Germany), FI (Sweden), and other European financial authorities. These filings are mandatory for directors, officers, and holders of more than 10% of a company's shares. InsiderLens aggregates and normalizes this data for analysis.