ZBIO

NasdaqGSHealthcare

Zenas BioPharma, Inc.

Latest filing · 2026-05-18 · scanner 8d behind

$18.97

-4.4%· 24h

Score

/ 100

On fire

7 triggers firing

C-suite buyLarge buyFirst buy 12moNet buying 90dSmall floatHigh short int.Days to cover

Market cap

$1181.23M

Float

39.7M

63% of total

Shares out

63,133,377

Short % float

••••

Pro only

Days to cover

••••

Pro only

Price

1 buy

ZBIO

$18.97

$7.17 · -27.4%

AI briefPro — synthesised analysis of insider signals and filing context.

Upgrade →

Rule breakdown80 / 110 pts max

73% of maximum scoreSignalContext

Form 4 signals

Cluster buy

3+ distinct insiders with open-market buys in the last 30 days

–

pts

C-suite buy

CEO, CFO, Chair, or President made an open-market purchase

MOULDER LEON O JR — Chief Executive Officer

+20

pts

Large single buy

One open-market purchase exceeded the dollar threshold

$1,012,800

+15

pts

First buy in 12 months

An insider bought for the first time in the trailing 12 months

MOULDER LEON O JR

+15

pts

Net buying (90d)

Net (buys − sells) USD over the last 90 days is positive

$1,012,800

+10

pts

Context amplifiers

High short interest

Short interest as % of float exceeds the squeeze threshold

26.1% of float

+10

pts

Small float

Float is below the threshold — amplifies any accumulation signal

39.7M shares

pts

High days-to-cover

DTC > threshold — shorts can't exit cleanly on a squeeze

14.6d to cover

pts

Volume spike

Most-recent day's volume was >2× the 20-day average

–

pts

Type	Date	Insider	Title	Shares	Price	Value
Buy	2026-05-18	MOULDER LEON O JR	Chief Executive Officer	60,000	$16.88	$1.01M