ZBIONasdaq

Zenas BioPharma, Inc.

Alert me on ZBIO

Insider buys, 6 months

Congress trades, 6 months

Signals, 6 months

Six months

After each filing

May 19 Buy MOULDER LEON O JR Insider

1 week

+1.4%S&P +2.3%

1 month

+10.9%S&P +2.0%

3 months

+75.2%S&P +5.1%

6 months

Result in6 trading days

Apr 30 Buy MOULDER LEON O JR Insider

1 week

−0.3%S&P +1.8%

1 month

−6.0%S&P +5.5%

3 months

+62.7%S&P +4.2%

6 months

+48.9%S&P +7.6%

Apr 3 Buy Lu Hongbo Insider

1 week

−5.5%S&P +4.1%

1 month

−6.7%S&P +9.8%

3 months

+24.3%S&P +13.8%

6 months

+25.0%S&P +18.2%

Apr 2 Buy Fairmount Funds Management LLC Insider

1 week

−4.8%S&P +3.6%

1 month

+0.5%S&P +9.5%

3 months

+23.3%S&P +14.8%

6 months

+31.8%S&P +17.9%

Apr 2 Buy Fairmount Healthcare Fund II L.P. Insider

1 week

−4.8%S&P +3.6%

1 month

+0.5%S&P +9.5%

3 months

+23.3%S&P +14.8%

6 months

+31.8%S&P +17.9%

Show all 23

Apr 2 Buy Kiselak Tomas Insider

1 week

−4.8%S&P +3.6%

1 month

+0.5%S&P +9.5%

3 months

+23.3%S&P +14.8%

6 months

+31.8%S&P +17.9%

Apr 2 Buy Harwin Peter Evan Insider

1 week

−4.8%S&P +3.6%

1 month

+0.5%S&P +9.5%

3 months

+23.3%S&P +14.8%

6 months

+31.8%S&P +17.9%

Apr 1 Buy MOULDER LEON O JR Insider

1 week

+4.5%S&P +3.8%

1 month

−4.9%S&P +10.0%

3 months

+33.7%S&P +14.0%

6 months

+37.2%S&P +17.2%

Apr 1 Buy Lu Hongbo Insider

1 week

+4.5%S&P +3.8%

1 month

−4.9%S&P +10.0%

3 months

+33.7%S&P +14.0%

6 months

+37.2%S&P +17.2%

Feb 14 Buy Lu Hongbo Insider

1 week

−2.6%S&P +0.7%

1 month

−14.0%S&P −3.1%

3 months

−36.8%S&P +8.5%

6 months

+19.2%S&P +13.0%

Feb 14 Buy Allen Patricia L Insider

1 week

−2.6%S&P +0.7%

1 month

−14.0%S&P −3.1%

3 months

−36.8%S&P +8.5%

6 months

+19.2%S&P +13.0%

Feb 4 Buy MOULDER LEON O JR Insider

1 week

+12.6%S&P +0.8%

1 month

+22.4%S&P −2.0%

3 months

+0.8%S&P +7.2%

6 months

+55.7%S&P +12.6%

Jan 10 Buy MOULDER LEON O JR Insider

1 week

+5.6%S&P −2.5%

1 month

+17.6%S&P −0.5%

3 months

+7.9%S&P +0.2%

6 months

+48.7%S&P +9.2%

Oct 15, 2025 Buy Nunn Jason Raleigh Insider

1 week

−9.7%S&P +0.4%

1 month

+32.1%S&P +1.0%

3 months

−26.2%S&P +4.4%

6 months

−19.2%S&P +7.4%

Oct 15, 2025 Buy SR ONE CAPITAL MANAGEMENT, LLC Insider

1 week

−9.7%S&P +0.4%

1 month

+32.1%S&P +1.0%

3 months

−26.2%S&P +4.4%

6 months

−19.2%S&P +7.4%

Oct 15, 2025 Buy George Simeon Insider

1 week

−9.7%S&P +0.4%

1 month

+32.1%S&P +1.0%

3 months

−26.2%S&P +4.4%

6 months

−19.2%S&P +7.4%

Oct 14, 2025 Buy ENRIGHT PATRICK G Insider

1 week

+0.7%S&P +1.4%

1 month

+38.5%S&P +3.2%

3 months

−12.7%S&P +4.6%

6 months

−15.8%S&P +6.6%

Oct 10, 2025 Buy MOULDER LEON O JR Insider

1 week

−9.9%S&P +1.7%

1 month

+22.1%S&P +4.4%

3 months

−25.6%S&P +6.8%

6 months

−19.7%S&P +7.0%

Oct 10, 2025 Buy Fairmount Funds Management LLC Insider

1 week

−9.9%S&P +1.7%

1 month

+22.1%S&P +4.4%

3 months

−25.6%S&P +6.8%

6 months

−19.7%S&P +7.0%

Oct 10, 2025 Buy Fairmount Healthcare Fund II L.P. Insider

1 week

−9.9%S&P +1.7%

1 month

+22.1%S&P +4.4%

3 months

−25.6%S&P +6.8%

6 months

−19.7%S&P +7.0%

Oct 10, 2025 Buy Kiselak Tomas Insider

1 week

−9.9%S&P +1.7%

1 month

+22.1%S&P +4.4%

3 months

−25.6%S&P +6.8%

6 months

−19.7%S&P +7.0%

Oct 10, 2025 Buy Harwin Peter Evan Insider

1 week

−9.9%S&P +1.7%

1 month

+22.1%S&P +4.4%

3 months

−25.6%S&P +6.8%

6 months

−19.7%S&P +7.0%

Oct 9, 2025 Buy Lu Hongbo Insider

1 week

−12.8%S&P −1.6%

1 month

+21.1%S&P 0.0%

3 months

−42.1%S&P +3.7%

6 months

−24.2%S&P +2.8%

Every purchase and sale on this ticker reported by a member of Congress or an insider, measured from the close of the first trading day after it became public to the close 1 week, 1 month, 3 months and 6 months later, each beside the S&P over the same days.

Filings for ZBIO

45 held · newest 545 held · newest 2

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See all 45 filings for ZBIO

Aeon news and offers by email

New sources, new features and offers like our founding price. A few times a month at most. Stop any time.

Signal history

No signal for this ticker yet. A signal is written when insider buying here scores one dot or more.

Stakes

Sep 30, 2026 Schedule 13G, amended

Xencor, Inc.: 1.5%, 1,000,000 shares

Sep 30, 2026 Schedule 13G

BlackRock, Inc.: 5%, 3,287,021 shares

Aug 31, 2026 Schedule 13G

Wellington Management Group LLP: 10.1%, 6,566,134 shares

Aug 26, 2026 Schedule 13G, amended

InnoCare Pharma Inc.: 10.4%, 7,000,000 shares

Aug 19, 2026 Schedule 13D, amended

Enavate Sciences GP, LLC: 4.9%, 3,245,404 shares

Aug 13, 2026 Schedule 13D, amended

SR One Capital Management, LLC: 7.7%, 5,037,854 shares

Apr 29, 2026 Schedule 13D

MOULDER LEON O JR: 5.1%, 3,220,880 shares

Mar 31, 2026 Schedule 13D, amended

Leon O. Moulder, Jr.: 4.8%, 3,029,921 shares

Dec 31, 2025 Schedule 13G, amended

FMR LLC: 14.3%, 7,652,255 shares

Jan 7, 2026 Schedule 13D

Leon O. Moulder, Jr.: 5.2%, 2,806,792 shares

Sep 30, 2025 Schedule 13G, amended

Novo Holdings A/S: 4.7%, 2,000,000 shares

Oct 7, 2025 Schedule 13G

InnoCare Pharma Inc.: 9.4%, 5,000,000 shares

Oct 9, 2025 Schedule 13D, amended

Enavate Sciences GP, LLC: 7.3%, 3,919,159 shares

Oct 9, 2025 Schedule 13D, amended

SR One Capital Management, LLC: 9.4%, 5,037,854 shares

Oct 9, 2025 Schedule 13D, amended

Patrick G. Enright: 4.9%, 2,631,522 shares

Oct 7, 2025 Schedule 13D, amended

Leon O. Moulder, Jr.: 4.8%, 2,594,662 shares

Aug 29, 2025 Schedule 13G, amended

FMR LLC: 11%, 4,644,279 shares

Schedule 13D is filed within 5 business days of crossing 5 percent by an investor who may seek to influence the company. Schedule 13G is filed by a passive holder, and a large institution has up to 45 days after the quarter end.

Government contracts, last 12 months

Awards of $10M and up, from USAspending · context, not a signal

No contracts of $10M or more in the last 12 months.

Lobbying

Last four quarters

No lobbying reports on file.