Companies / Zenas BioPharma, Inc.

Zenas BioPharma, Inc.

Nasdaq: ZBIOCIK 1953926WALTHAM, MA
Insider flow · last 90 daysNet buys $1.01M

Financials · FY2025

Revenue$10.00M
Net income$-377.74M
Total debt$78.64M
Cash$196.58M
Diluted EPS$-8.44
Shares outstanding65.2M

Ownership

65.2M shares outstanding · as of Jul 31, 2026
1.5%Insiders
Ownership
Insiders1.48%963,885
10%+ / strategic11.74%7,652,255
Institutions61.55%40,116,379
Public float25.23%16,444,204

% of common shares outstanding (exact, from the latest cover-page filing). Institutions are quarterly 13F snapshots; insiders reflect current officers & directors.

Insiders 5

View all →
Insider% of sharesShares
Moulder Leon O JrSee Remarks · Director
0.80%520,083
Lu HongboDirector
0.65%422,968
Allen Patricia LDirector
0.03%19,860
Farmer Joseph LSee Remarks
<0.01%974
Enright Patrick GDirector
——

Institutional holders 127

View all →
HolderValue% of shares
Fmr LLC$279.74M11.82%
Sr One Capital Management, LP$182.92M7.73%
Enavate Sciences GP, LLC$142.30M6.01%
NEA Management Company, LLC$127.93M5.41%
Fairmount Funds Management LLC$80.21M3.39%
BlackRock, Inc.$68.18M4.12%
Federated Hermes Inc$61.13M4.80%
Vanguard Group Inc$52.76M2.23%
Novo Holdings A/S$52.65M2.22%
State Street Corporation$52.16M3.15%

Activity

View all →
InsidersInstitutions
What insiders are doing in this stock (Form 4).
DateActorActionSecurityValueShares ΔPosition afterImpact
Mar 31, 2026Lu Hongbo
Director
BuyCommon Stock$1.50M+75K
+21.55%
422,968
0.65% of shares
high
Feb 2, 2026Moulder Leon O Jr
Executive
BuyCommon Stock$1.02M+57K
+15.57%
423,155
0.65% of shares
high
May 18, 2026Moulder Leon O Jr
Executive
BuyCommon Stock$1.01M+60K
+162.48%
96,928
0.15% of shares
high
Jan 7, 2026Moulder Leon O Jr
Executive
BuyCommon Stock$819.0K+50K
+18.79%
316,155
0.49% of shares
high
Mar 31, 2026Moulder Leon O Jr
Executive
BuyCommon Stock$656.5K+34K
+2.01%
1,726,039
2.65% of shares
high
Apr 29, 2026Moulder Leon O Jr
Executive
BuyCommon Stock$616.7K+35K
+2.00%
1,786,039
2.74% of shares
high
Feb 11, 2026Lu Hongbo
Director
BuyCommon Stock$584.7K+26K
+8.07%
347,968
0.53% of shares
high
Jan 8, 2026Moulder Leon O Jr
Executive
BuyCommon Stock$489.0K+30K
+9.49%
346,155
0.53% of shares
high

5%+ ownership events

Schedule 13D / 13G
FilerStance% of classSharesDate
Fmr LLCPassive13G/A—7,652,255—

Securities

via CUSIP / OpenFIGI
SymbolTypeMarketCUSIPFIGI
ZBIOCommon StockEquity98937L105BBG01J1MG9D6