ZBIO
Ticker
Zenas BioPharma, Inc.
ZBIO · Healthcare · Zenas BioPharma, Inc., a clinical-stage biopharma company, engages in the development and commercialization of transformative immunology-ba…Zenas BioPharma, Inc. (ZBIO), in the Healthcare sector, has 15 disclosed filings on Paydirt over the trailing twelve months from 7 corporate insiders: 15 purchases and 0 sales, 1 filed past the deadline. Filers took a median of 2 days from execution to disclosure, and the most recent trade was executed May 18 and filed May 19. The most active filer was Leon O Moulder Jr with 9 filings.
Add to watchlistFilings, ttm
15
15 buys · 0 sells · 1 late
Traders, ttm
7
7 insiders
Volume, ttmiDollar value disclosed in the window
$30.0M
estimated for Congress, as filed for insiders
Median delay
2d
execution to disclosure
Last traded
May 18
Filed May 18
ADViAverage daily dollar volume
–
not on file
Share price · 12M
$31.65 (+67.0%)
Adjusted for splits and dividends.
Volume by month
Buys $31.0M
Sells $0
Estimated for Congress, as filed for insiders · by filing month · past 24 months
Who filed
LJRecent filings
Leon O Moulder JrPURCHASE
Chief Executive Officer
$1.0M60,000 sh × $16.88
Exec May 18
Filed May 18 · 9:12 PM ET Leon O Moulder JrPURCHASE Chief Executive Officer $1.1M
60,000 sh across 2 lots
Exec Apr 28
Filed Apr 29 · 7:21 PM ET Fairmount Funds Management LLCPURCHASE Director $3.0M
150,000 sh × $20.00
Exec Mar 31
Filed Apr 1 · 4:30 PM ET Leon O Moulder JrPURCHASE Chief Executive Officer $1.0M
54,000 sh across 2 lots
Exec Mar 30
Filed Mar 31 · 8:14 PM ET Hongbo LuPURCHASE Director $1.5M
75,000 sh × $20.00
Exec Mar 31
Filed Mar 31 · 5:00 PM ET Hongbo LuPURCHASE Director $585K
25,985 sh × $22.50
Exec Feb 11
Filed Feb 13 · 5:35 PM ET Patricia L AllenPURCHASE Director $500K
19,860 sh across 4 lots
Exec Feb 12
Filed Feb 13 · 5:06 PM ET Leon O Moulder JrPURCHASE Chief Executive Officer $1.0M
57,000 sh × $17.96
Exec Feb 2
Filed Feb 3 · 4:30 PM ET Leon O Moulder JrPURCHASE Chief Executive Officer $1.6M
100,000 sh across 3 lots
Exec Jan 7
Filed Jan 9 · 9:42 PM ET Jason Raleigh NunnPURCHASE Director $1.2M
63,158 sh × $19.00
Exec Oct 9 2025
Filed Oct 14 2025 · 5:16 PM ET Sr One Capital Management, LlcPURCHASE 10% owner $2.4M
126,315 sh across 2 lots
Exec Oct 9 2025
Filed Oct 14 2025 · 5:14 PM ET Patrick G EnrightPURCHASE Director $2.3M
117,255 sh across 2 lots
Exec Oct 9 2025
Filed Oct 14 2025 · 8:59 AM ET Leon O Moulder JrPURCHASE See Remarks $770K
36,928 sh × $20.85
Exec Oct 7 2025
Filed Oct 9 2025 · 5:24 PM ET Fairmount Funds Management LLCPURCHASE Director $6.0M
316,219 sh × $19.00
Exec Oct 7 2025
Filed Oct 9 2025 · 4:15 PM ET Hongbo LuPURCHASE Director $6.0M
321,983 sh across 2 lots
Exec Sep 13 2024
Filed Oct 9 2025 · 3:37 PM ET † Leon O Moulder JrPURCHASE Chief Executive Officer $167K
25,000 sh × $6.67
Exec Feb 18 2025
Filed Feb 19 2025 · 5:30 PM ET Leon O Moulder JrPURCHASE Chief Executive Officer $718K
70,000 sh across 2 lots
Exec Dec 3 2024
Filed Dec 4 2024 · 5:30 PM ET Leon O Moulder JrPURCHASE Chief Executive Officer $112K
7,500 sh × $15.00
Exec Nov 18 2024
Filed Nov 20 2024 · 5:30 PM ET Leon O Moulder JrPURCHASE Chief Executive Officer $179K
10,000 sh × $17.91
Exec Sep 18 2024
Filed Sep 20 2024 · 5:30 PM ET Zebra Aggregator, LPPURCHASE 10% owner $15.0M
882,353 sh × $17.00
Exec Sep 16 2024
Filed Sep 18 2024 · 5:30 PM ET Hongbo LuPURCHASE Director $1000K
58,823 sh × $17.00
Exec Sep 13 2024
Filed Sep 17 2024 · 5:30 PM ET Fairmount Funds Management LLCPURCHASE Director $5.1M
300,000 sh × $17.00
Exec Sep 16 2024
Filed Sep 17 2024 · 5:30 PM ET Sr One Capital Management, LlcPURCHASE 10% owner $38.0M
2,235,294 sh across 3 lots
Exec Sep 16 2024
Filed Sep 16 2024 · 5:30 PM ET Peter Evan HarwinPURCHASE Director $5.1M
300,000 sh × $17.00
Exec Sep 16 2024
Filed Sep 16 2024 · 5:30 PM ET Jason Raleigh NunnPURCHASE Director $15.0M
882,352 sh across 2 lots
Exec Sep 16 2024
Filed Sep 16 2024 · 5:30 PM ET