MOULDER LEON O JR
SEC Form 4 insider trading activity
MOULDER LEON O JR has filed 7 SEC Form 4 filings (11 transaction rows) across 2 companies, including ZLAB, ZBIO, with disclosures dating back to 2025. 6 of those filings fall inside the rolling window. Most recent filing: Jun 22, 2026.
On the most recent filing, MOULDER LEON O JR is listed as Chief Executive Officer at Zenas BioPharma, Inc. Inside the rolling window, MOULDER LEON O JR reported 9 open-market purchases totaling $5.8M in ZBIO and no open-market sales. The largest disclosed transaction in the window is a purchase of 57,000 ZBIO shares on Feb 2, 2026, worth $1.0M.
Companies traded
Other insiders at ZLAB
Insider Buying
$5.8M
reported purchases (SEC code P)
Insider Selling
$0
reported sales (SEC code S)
Companies
2
in the rolling window
| Source | |||||||
|---|---|---|---|---|---|---|---|
| ZBIO | Chief Executive Officer | Purchase | 60,000 | $1.0M | May 19 | SEC ↗ | |
| ZBIO | Chief Executive Officer | Purchase | 25,000 | $451K | Apr 29 | SEC ↗ | |
| ZBIO | Chief Executive Officer | Purchase | 35,000 | $617K | Apr 29 | SEC ↗ | |
| ZBIO | Chief Executive Officer | Purchase | 20,000 | $365K | Mar 31 | SEC ↗ | |
| ZBIO | Chief Executive Officer | Purchase | 34,000 | $657K | Mar 31 | SEC ↗ | |
| ZBIO | Chief Executive Officer | Purchase | 57,000 | $1.0M | Feb 3 | SEC ↗ | |
| ZBIO | Chief Executive Officer | Purchase | 50,000 | $819K | Jan 9 | SEC ↗ | |
| ZBIO | Chief Executive Officer | Purchase | 30,000 | $489K | Jan 9 | SEC ↗ | |
| ZBIO | Chief Executive Officer | Purchase | 20,000 | $331K | Jan 9 | SEC ↗ |
Earlier trades
Open-market purchases and sales filed before the rolling 365-day window, kept from the original Form 4 filings.
| Date | Ticker | Type | Value |
|---|---|---|---|
| Oct 7, 2025 | ZBIO | Purchase | $770K |
Frequently asked questions
How many SEC Form 4 filings has MOULDER LEON O JR made?
MOULDER LEON O JR has filed 7 SEC Form 4 filings (11 transaction rows) across 2 companies, including ZLAB, ZBIO since 2025.
Which companies does MOULDER LEON O JR trade?
MOULDER LEON O JR has filed SEC Form 4 disclosures for 2 companies, including ZLAB, ZBIO.
When was MOULDER LEON O JR's most recent SEC Form 4 filing?
MOULDER LEON O JR's most recent SEC Form 4 filing on Tracefour is dated Jun 22, 2026.
What is MOULDER LEON O JR's total buy and sell value in the current window?
Inside the rolling retention window, MOULDER LEON O JR bought $5.8M and sold $0 based on SEC Form 4 filings.
What was MOULDER LEON O JR's largest disclosed transaction?
The largest disclosed transaction in the current window is a purchase of 57,000 ZBIO shares on 2026-02-02, worth $1.0M, per SEC Form 4 filings.