ZBIO

Zenas BioPharma, Inc.$19.84+2.08 (+11.68%)

Prev Close$17.76·MCap$820.5M·P/E—·Vol778.5K·Yield—

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Buys (12M)

$15.57M

▼

Sells (12M)

$0.00

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Net Activity

Net Buyer

$15.57M

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Active Insiders

last 12 mo

Over the past 12 months, insider activity at Zenas BioPharma, Inc. (ZBIO) has been exclusively buying, with 12 insider purchases totaling $15.57M and 0 insider sales totaling $0.00. The most recent insider transaction was by MOULDER LEON O JR (director, officer: Chief Executive Officer), who purchased $1.01M worth of shares on May 18, 2026. Zenas BioPharma, Inc. operates in the Healthcare sector, within the Biotechnology industry, with a market cap of $820.5M.

ZBIO Insider Trading Activity

Date	Insider	Role	Type	Shares	Avg Price	Value	Shares After
May 18, 2026	MOULDER LEON O JR	director, officer: Chief Executive Officer	Buy	60,000	$16.88	$1.01M	96,928+162%
Apr 29, 2026	MOULDER LEON O JR	director, officer: Chief Executive Officer	Buy	60,000	$17.79	$1.07M	1,786,039
Apr 1, 2026	Fairmount Funds Management LLC	director	Buy	150,000	$20.00	$3.00M	2,359,025
Mar 31, 2026	Lu Hongbo	director	Buy	75,000	$20.00	$1.50M	422,968
Mar 31, 2026	MOULDER LEON O JR	director, officer: Chief Executive Officer	Buy	54,000	$18.91	$1.02M	1,726,039
Feb 12, 2026	Allen Patricia L	Director	Buy	19,860	$25.16	$499.7K	0
Feb 11, 2026	Lu Hongbo	Director	Buy	25,985	$22.50	$584.7K	0
Feb 2, 2026	MOULDER LEON O JR	Chief Executive Officer	Buy	57,000	$17.96	$1.02M	0
Jan 7, 2026	MOULDER LEON O JR	Chief Executive Officer	Buy	100,000	$16.39	$1.64M	0
Oct 9, 2025	ENRIGHT PATRICK G	Director	Buy	117,255	$19.19	$2.25M	0
Oct 9, 2025	Nunn Jason Raleigh	Director	Buy	63,158	$19.00	$1.20M	0
Oct 7, 2025	MOULDER LEON O JR	See Remarks	Buy	36,928	$20.85	$769.9K	0
Sep 13, 2024	Lu Hongbo	Director	Buy	321,983	$18.63	$6.00M0.7% OS	0

ZBIO Insider Buying Activity

The following table shows recent insider purchases of Zenas BioPharma, Inc. (ZBIO) stock reported via SEC Form 4 filings.

Date	Insider	Role	Type	Shares	Avg Price	Value	Shares After
May 18, 2026	MOULDER LEON O JR	director, officer: Chief Executive Officer	Buy	60,000	$16.88	$1.01M	96,928+162%
Apr 29, 2026	MOULDER LEON O JR	director, officer: Chief Executive Officer	Buy	60,000	$17.79	$1.07M	1,786,039
Apr 1, 2026	Fairmount Funds Management LLC	director	Buy	150,000	$20.00	$3.00M	2,359,025
Mar 31, 2026	Lu Hongbo	director	Buy	75,000	$20.00	$1.50M	422,968
Mar 31, 2026	MOULDER LEON O JR	director, officer: Chief Executive Officer	Buy	54,000	$18.91	$1.02M	1,726,039
Feb 12, 2026	Allen Patricia L	Director	Buy	19,860	$25.16	$499.7K	0
Feb 11, 2026	Lu Hongbo	Director	Buy	25,985	$22.50	$584.7K	0
Feb 2, 2026	MOULDER LEON O JR	Chief Executive Officer	Buy	57,000	$17.96	$1.02M	0
Jan 7, 2026	MOULDER LEON O JR	Chief Executive Officer	Buy	100,000	$16.39	$1.64M	0
Oct 9, 2025	ENRIGHT PATRICK G	Director	Buy	117,255	$19.19	$2.25M	0
Oct 9, 2025	Nunn Jason Raleigh	Director	Buy	63,158	$19.00	$1.20M	0
Oct 7, 2025	MOULDER LEON O JR	See Remarks	Buy	36,928	$20.85	$769.9K	0
Sep 13, 2024	Lu Hongbo	Director	Buy	321,983	$18.63	$6.00M0.7% OS	0