ZBIO Insider Purchase Research

Site Information
MarketWizards.netInsider Purchase Research
ZBIO
Sector : Health CareCurrent Market Cap : $1.85BInsider Purchase Pulse Date: May 18, 2026
Market price & volume through Shares outstanding as of (SEC filing)Short interest as of (FINRA)

How This Insider Purchase Pulse Works

“Purchase” refers to qualifying purchases made by company insiders. An Insider Purchase Pulse is a point-in-time research snapshot of that activity, not a recommendation from MarketWizards to purchase the stock. The Insider Purchase Pulse Date is the date the most recent qualifying insider purchase became public. The report summarizes all qualifying purchases disclosed during the 7-, 30-, 60-, 90-, and 180-calendar-day periods counted backward from the Pulse Date—not backward from today. Purchases disclosed on the Pulse Date itself are also included. When a new qualifying purchase becomes public, it creates a new Pulse Date, and all activity windows and KPIs are recalculated. The previous Pulse remains a historical observation, but its return monitoring closes. A new monitoring period begins from the new Pulse Date so subsequent performance is evaluated against the latest insider-information state.

The report is designed to make the timing, concentration, and scale of qualifying insider purchases across the 180-calendar-day lookback easy to see. It also tracks the stock’s subsequent return and performance relative to SPY from the Latest Pulse Date, helping readers observe how forward performance develops after each disclosed purchase pattern.

Example

For this May 18, 2026 Insider Purchase Pulse, the 30-day lookback covers Apr. 19 through May 18. If another qualifying purchase becomes public on May 25, May 25 becomes the new Pulse Date, the activity windows and KPIs are recalculated, and return monitoring begins again from the new Pulse.

Purchase Commitment

Capital Committed$6.92M180-day total
Shares Purchased380.6K180-day total

Insider Participation

Buyers3180-day total
Events15180-day total

Insider Cost & Market Price

Weighted Cost$18.18
Market Price$28.39
Price vs Cost+56.18%

Relative Purchase Size

180D Purchase / Current Market Cap i0.37%
180D Shares Purchased / Current Shares Outstanding i0.58%

Short Interest & Liquidity

Short Interest i18.32%
Days to Cover i23.28 days

Price & Insider Purchases Before the Pulse Date

Six-month price history ending on the Pulse Date. Purchase markers use transaction dates and reported weighted purchase prices.

$11.84$23.40$34.97$46.53Dec 2025Jan 2026Feb 2026Mar 2026Apr 2026May 2026Pulse Date - May 18, 2026Market PriceSPY - RebasedInsider PurchasePulse DateNov 18, 2025Closing Price$36.21Nov 19, 2025Closing Price$37.15Nov 20, 2025Closing Price$34.84Nov 21, 2025Closing Price$35.80Nov 24, 2025Closing Price$38.25Nov 25, 2025Closing Price$39.86Nov 26, 2025Closing Price$40.53Nov 28, 2025Closing Price$38.83Dec 1, 2025Closing Price$37.07Dec 2, 2025Closing Price$34.50Dec 3, 2025Closing Price$36.67Dec 4, 2025Closing Price$38.11Dec 5, 2025Closing Price$39.38Dec 8, 2025Closing Price$39.37Dec 9, 2025Closing Price$38.17Dec 10, 2025Closing Price$39.10Dec 11, 2025Closing Price$40.21Dec 12, 2025Closing Price$40.59Dec 15, 2025Closing Price$32.59Dec 16, 2025Closing Price$36.89Dec 17, 2025Closing Price$35.81Dec 18, 2025Closing Price$35.07Dec 19, 2025Closing Price$36.15Dec 22, 2025Closing Price$42.33Dec 23, 2025Closing Price$42.81Dec 24, 2025Closing Price$43.17Dec 26, 2025Closing Price$42.49Dec 29, 2025Closing Price$39.05Dec 30, 2025Closing Price$36.58Dec 31, 2025Closing Price$36.31Jan 2, 2026Closing Price$34.50Jan 5, 2026Closing Price$16.61Jan 6, 2026Closing Price$15.20Jan 7, 2026Closing Price$16.51Jan 8, 2026Closing Price$16.41Jan 9, 2026Closing Price$16.08Jan 12, 2026Closing Price$19.78Jan 13, 2026Closing Price$21.57Jan 14, 2026Closing Price$22.56Jan 15, 2026Closing Price$19.93Jan 16, 2026Closing Price$20.16Jan 20, 2026Closing Price$20.88Jan 21, 2026Closing Price$19.59Jan 22, 2026Closing Price$20.40Jan 23, 2026Closing Price$20.09Jan 26, 2026Closing Price$19.32Jan 27, 2026Closing Price$20.07Jan 28, 2026Closing Price$21.47Jan 29, 2026Closing Price$20.88Jan 30, 2026Closing Price$18.37Feb 2, 2026Closing Price$18.15Feb 3, 2026Closing Price$19.72Feb 4, 2026Closing Price$20.66Feb 5, 2026Closing Price$21.01Feb 6, 2026Closing Price$21.80Feb 9, 2026Closing Price$22.48Feb 10, 2026Closing Price$21.48Feb 11, 2026Closing Price$23.27Feb 12, 2026Closing Price$26.11Feb 13, 2026Closing Price$26.40Feb 17, 2026Closing Price$26.77Feb 18, 2026Closing Price$26.68Feb 19, 2026Closing Price$27.02Feb 20, 2026Closing Price$25.88Feb 23, 2026Closing Price$26.14Feb 24, 2026Closing Price$26.07Feb 25, 2026Closing Price$26.03Feb 26, 2026Closing Price$26.36Feb 27, 2026Closing Price$26.35Mar 2, 2026Closing Price$25.56Mar 3, 2026Closing Price$25.18Mar 4, 2026Closing Price$25.82Mar 5, 2026Closing Price$25.26Mar 6, 2026Closing Price$25.28Mar 9, 2026Closing Price$26.14Mar 10, 2026Closing Price$25.92Mar 11, 2026Closing Price$25.34Mar 12, 2026Closing Price$24.50Mar 13, 2026Closing Price$24.04Mar 16, 2026Closing Price$23.23Mar 17, 2026Closing Price$23.48Mar 18, 2026Closing Price$23.03Mar 19, 2026Closing Price$23.37Mar 20, 2026Closing Price$22.30Mar 23, 2026Closing Price$20.63Mar 24, 2026Closing Price$21.06Mar 25, 2026Closing Price$22.19Mar 26, 2026Closing Price$22.16Mar 27, 2026Closing Price$18.21Mar 30, 2026Closing Price$18.23Mar 31, 2026Closing Price$19.55Apr 1, 2026Closing Price$20.36Apr 2, 2026Closing Price$21.46Apr 6, 2026Closing Price$22.26Apr 7, 2026Closing Price$22.48Apr 8, 2026Closing Price$20.86Apr 9, 2026Closing Price$21.28Apr 10, 2026Closing Price$20.44Apr 13, 2026Closing Price$21.04Apr 14, 2026Closing Price$21.34Apr 15, 2026Closing Price$21.05Apr 16, 2026Closing Price$21.76Apr 17, 2026Closing Price$21.82Apr 20, 2026Closing Price$20.90Apr 21, 2026Closing Price$20.44Apr 22, 2026Closing Price$20.07Apr 23, 2026Closing Price$18.49Apr 24, 2026Closing Price$18.19Apr 27, 2026Closing Price$18.59Apr 28, 2026Closing Price$18.01Apr 29, 2026Closing Price$17.55Apr 30, 2026Closing Price$19.32May 1, 2026Closing Price$19.36May 4, 2026Closing Price$21.56May 5, 2026Closing Price$20.76May 6, 2026Closing Price$20.83May 7, 2026Closing Price$19.27May 8, 2026Closing Price$19.64May 11, 2026Closing Price$20.40May 12, 2026Closing Price$19.16May 13, 2026Closing Price$19.93May 14, 2026Closing Price$18.90May 15, 2026Closing Price$18.34May 18, 2026Closing Price$16.91Nov 18, 2025SPY Closing Price$660.08SPY Return0.00%Nov 19, 2025SPY Closing Price$662.63SPY Return+0.39%Nov 20, 2025SPY Closing Price$652.53SPY Return-1.14%Nov 21, 2025SPY Closing Price$659.03SPY Return-0.16%Nov 24, 2025SPY Closing Price$668.73SPY Return+1.31%Nov 25, 2025SPY Closing Price$675.02SPY Return+2.26%Nov 26, 2025SPY Closing Price$679.68SPY Return+2.97%Nov 28, 2025SPY Closing Price$683.39SPY Return+3.53%Dec 1, 2025SPY Closing Price$680.27SPY Return+3.06%Dec 2, 2025SPY Closing Price$681.53SPY Return+3.25%Dec 3, 2025SPY Closing Price$683.89SPY Return+3.61%Dec 4, 2025SPY Closing Price$684.39SPY Return+3.68%Dec 5, 2025SPY Closing Price$685.69SPY Return+3.88%Dec 8, 2025SPY Closing Price$683.63SPY Return+3.57%Dec 9, 2025SPY Closing Price$683.04SPY Return+3.48%Dec 10, 2025SPY Closing Price$687.57SPY Return+4.16%Dec 11, 2025SPY Closing Price$689.17SPY Return+4.41%Dec 12, 2025SPY Closing Price$681.76SPY Return+3.28%Dec 15, 2025SPY Closing Price$680.73SPY Return+3.13%Dec 16, 2025SPY Closing Price$678.87SPY Return+2.85%Dec 17, 2025SPY Closing Price$671.40SPY Return+1.71%Dec 18, 2025SPY Closing Price$676.47SPY Return+2.48%Dec 19, 2025SPY Closing Price$680.59SPY Return+3.11%Dec 22, 2025SPY Closing Price$684.83SPY Return+3.75%Dec 23, 2025SPY Closing Price$687.96SPY Return+4.22%Dec 24, 2025SPY Closing Price$690.38SPY Return+4.59%Dec 26, 2025SPY Closing Price$690.31SPY Return+4.58%Dec 29, 2025SPY Closing Price$687.85SPY Return+4.21%Dec 30, 2025SPY Closing Price$687.01SPY Return+4.08%Dec 31, 2025SPY Closing Price$681.92SPY Return+3.31%Jan 2, 2026SPY Closing Price$683.17SPY Return+3.50%Jan 5, 2026SPY Closing Price$687.72SPY Return+4.19%Jan 6, 2026SPY Closing Price$691.81SPY Return+4.81%Jan 7, 2026SPY Closing Price$689.58SPY Return+4.47%Jan 8, 2026SPY Closing Price$689.51SPY Return+4.46%Jan 9, 2026SPY Closing Price$694.07SPY Return+5.15%Jan 12, 2026SPY Closing Price$695.16SPY Return+5.31%Jan 13, 2026SPY Closing Price$693.77SPY Return+5.10%Jan 14, 2026SPY Closing Price$690.36SPY Return+4.59%Jan 15, 2026SPY Closing Price$692.24SPY Return+4.87%Jan 16, 2026SPY Closing Price$691.66SPY Return+4.78%Jan 20, 2026SPY Closing Price$677.58SPY Return+2.65%Jan 21, 2026SPY Closing Price$685.40SPY Return+3.84%Jan 22, 2026SPY Closing Price$688.98SPY Return+4.38%Jan 23, 2026SPY Closing Price$689.23SPY Return+4.42%Jan 26, 2026SPY Closing Price$692.73SPY Return+4.95%Jan 27, 2026SPY Closing Price$695.49SPY Return+5.36%Jan 28, 2026SPY Closing Price$695.42SPY Return+5.35%Jan 29, 2026SPY Closing Price$694.04SPY Return+5.14%Jan 30, 2026SPY Closing Price$691.97SPY Return+4.83%Feb 2, 2026SPY Closing Price$695.41SPY Return+5.35%Feb 3, 2026SPY Closing Price$689.53SPY Return+4.46%Feb 4, 2026SPY Closing Price$686.19SPY Return+3.96%Feb 5, 2026SPY Closing Price$677.62SPY Return+2.66%Feb 6, 2026SPY Closing Price$690.62SPY Return+4.63%Feb 9, 2026SPY Closing Price$693.95SPY Return+5.13%Feb 10, 2026SPY Closing Price$692.12SPY Return+4.85%Feb 11, 2026SPY Closing Price$691.96SPY Return+4.83%Feb 12, 2026SPY Closing Price$681.27SPY Return+3.21%Feb 13, 2026SPY Closing Price$681.75SPY Return+3.28%Feb 17, 2026SPY Closing Price$682.85SPY Return+3.45%Feb 18, 2026SPY Closing Price$686.29SPY Return+3.97%Feb 19, 2026SPY Closing Price$684.48SPY Return+3.70%Feb 20, 2026SPY Closing Price$689.43SPY Return+4.45%Feb 23, 2026SPY Closing Price$682.39SPY Return+3.38%Feb 24, 2026SPY Closing Price$687.35SPY Return+4.13%Feb 25, 2026SPY Closing Price$693.15SPY Return+5.01%Feb 26, 2026SPY Closing Price$689.30SPY Return+4.43%Feb 27, 2026SPY Closing Price$685.99SPY Return+3.93%Mar 2, 2026SPY Closing Price$686.38SPY Return+3.98%Mar 3, 2026SPY Closing Price$680.33SPY Return+3.07%Mar 4, 2026SPY Closing Price$685.13SPY Return+3.79%Mar 5, 2026SPY Closing Price$681.31SPY Return+3.22%Mar 6, 2026SPY Closing Price$672.38SPY Return+1.86%Mar 9, 2026SPY Closing Price$678.27SPY Return+2.76%Mar 10, 2026SPY Closing Price$677.18SPY Return+2.59%Mar 11, 2026SPY Closing Price$676.33SPY Return+2.46%Mar 12, 2026SPY Closing Price$666.06SPY Return+0.91%Mar 13, 2026SPY Closing Price$662.29SPY Return+0.33%Mar 16, 2026SPY Closing Price$669.03SPY Return+1.36%Mar 17, 2026SPY Closing Price$670.79SPY Return+1.62%Mar 18, 2026SPY Closing Price$661.43SPY Return+0.20%Mar 19, 2026SPY Closing Price$659.80SPY Return-0.04%Mar 20, 2026SPY Closing Price$648.57SPY Return-1.74%Mar 23, 2026SPY Closing Price$655.38SPY Return-0.71%Mar 24, 2026SPY Closing Price$653.18SPY Return-1.05%Mar 25, 2026SPY Closing Price$656.82SPY Return-0.49%Mar 26, 2026SPY Closing Price$645.09SPY Return-2.27%Mar 27, 2026SPY Closing Price$634.09SPY Return-3.94%Mar 30, 2026SPY Closing Price$631.97SPY Return-4.26%Mar 31, 2026SPY Closing Price$650.34SPY Return-1.48%Apr 1, 2026SPY Closing Price$655.24SPY Return-0.73%Apr 2, 2026SPY Closing Price$655.83SPY Return-0.64%Apr 6, 2026SPY Closing Price$658.93SPY Return-0.17%Apr 7, 2026SPY Closing Price$659.22SPY Return-0.13%Apr 8, 2026SPY Closing Price$676.01SPY Return+2.41%Apr 9, 2026SPY Closing Price$679.91SPY Return+3.00%Apr 10, 2026SPY Closing Price$679.46SPY Return+2.94%Apr 13, 2026SPY Closing Price$686.10SPY Return+3.94%Apr 14, 2026SPY Closing Price$694.46SPY Return+5.21%Apr 15, 2026SPY Closing Price$699.94SPY Return+6.04%Apr 16, 2026SPY Closing Price$701.66SPY Return+6.30%Apr 17, 2026SPY Closing Price$710.14SPY Return+7.58%Apr 20, 2026SPY Closing Price$708.72SPY Return+7.37%Apr 21, 2026SPY Closing Price$704.08SPY Return+6.67%Apr 22, 2026SPY Closing Price$711.21SPY Return+7.75%Apr 23, 2026SPY Closing Price$708.45SPY Return+7.33%Apr 24, 2026SPY Closing Price$713.94SPY Return+8.16%Apr 27, 2026SPY Closing Price$715.17SPY Return+8.35%Apr 28, 2026SPY Closing Price$711.69SPY Return+7.82%Apr 29, 2026SPY Closing Price$711.58SPY Return+7.80%Apr 30, 2026SPY Closing Price$718.66SPY Return+8.87%May 1, 2026SPY Closing Price$720.65SPY Return+9.18%May 4, 2026SPY Closing Price$718.01SPY Return+8.78%May 5, 2026SPY Closing Price$723.77SPY Return+9.65%May 6, 2026SPY Closing Price$733.83SPY Return+11.17%May 7, 2026SPY Closing Price$731.58SPY Return+10.83%May 8, 2026SPY Closing Price$737.62SPY Return+11.75%May 11, 2026SPY Closing Price$739.30SPY Return+12.00%May 12, 2026SPY Closing Price$738.18SPY Return+11.83%May 13, 2026SPY Closing Price$742.31SPY Return+12.46%May 14, 2026SPY Closing Price$748.17SPY Return+13.35%May 15, 2026SPY Closing Price$739.17SPY Return+11.98%May 18, 2026SPY Closing Price$738.65SPY Return+11.90%Jan 7, 2026Capital Committed$819.0KShares Purchased50.0KBuyers1Events1Weighted Purchase Price$16.38Publicly DisclosedJan 10, 2026Jan 8, 2026Capital Committed$489.0KShares Purchased30.0KBuyers1Events1Weighted Purchase Price$16.30Publicly DisclosedJan 10, 2026Jan 9, 2026Capital Committed$331.0KShares Purchased20.0KBuyers1Events1Weighted Purchase Price$16.55Publicly DisclosedJan 10, 2026Feb 2, 2026Capital Committed$1.02MShares Purchased57.0KBuyers1Events1Weighted Purchase Price$17.96Publicly DisclosedFeb 3, 2026Feb 11, 2026Capital Committed$584.7KShares Purchased26.0KBuyers1Events1Weighted Purchase Price$22.50Publicly DisclosedFeb 13, 2026Feb 12, 2026Capital Committed$390.1KShares Purchased15.7KBuyers1Events3Weighted Purchase Price$24.85Publicly DisclosedFeb 13, 2026Feb 13, 2026Capital Committed$109.7KShares Purchased4.2KBuyers1Events1Weighted Purchase Price$26.36Publicly DisclosedFeb 13, 2026Mar 30, 2026Capital Committed$364.6KShares Purchased20.0KBuyers1Events1Weighted Purchase Price$18.23Publicly DisclosedApr 1, 2026Mar 31, 2026Capital Committed$726.7KShares Purchased37.8KBuyers2Events2Weighted Purchase Price$19.24Publicly DisclosedApr 1, 2026 - Apr 2, 2026Apr 28, 2026Capital Committed$450.5KShares Purchased25.0KBuyers1Events1Weighted Purchase Price$18.02Publicly DisclosedApr 30, 2026Apr 29, 2026Capital Committed$616.7KShares Purchased35.0KBuyers1Events1Weighted Purchase Price$17.62Publicly DisclosedApr 30, 2026May 18, 2026Capital Committed$1.01MShares Purchased60.0KBuyers1Events1Weighted Purchase Price$16.88Publicly DisclosedMay 19, 2026

SPY is rebased to the issuer price on the first common trading date. Marker size represents capital committed. Hover over a price line or purchase date, or use keyboard focus on a purchase date, to view details.

Stock Return After the Pulse Date

Tracks the stock's return after the Pulse Date and compares it with SPY. This chart tracks the stock’s forward returns from the Pulse Date—the date the latest qualifying insider purchase became public—showing how the stock performed after that information entered the public market—not the return earned by the insiders.

-102.01%+0.00%+102.01%1W2W3W1M2M3M6MIssuer ReturnSPY ReturnExcess Return1 Week Forward from Pulse DateIssuer: +10.8%SPY: +1.6%Excess: +9.1%2 Weeks Forward from Pulse DateIssuer: +1.3%SPY: +2.8%Excess: −1.5%3 Weeks Forward from Pulse DateIssuer: +8.9%SPY: −0.2%Excess: +9.1%1 Month Forward from Pulse DateIssuer: +9.9%SPY: +0.3%Excess: +9.6%2 Months Forward from Pulse DateIssuer: +81.5%SPY: +0.5%Excess: +81.1%3 Months Forward from Pulse DateIssuer: +88.7%SPY: +3.9%Excess: +84.8%

1 horizon pending—the required forward trading sessions have not elapsed yet.
Excess Return = Stock Return − SPY Return.

Insider Purchases as of the Pulse Date

Lookback windows ending on the Pulse Date - May 18, 2026

7-Day Lookback$1.01M60.0K shares
30-Day Lookback$2.08M120.0K shares
60-Day Lookback$3.17M177.8K shares
90-Day Lookback$3.17M177.8K shares
180-Day Lookback$6.92M380.6K shares

These calendar-day periods are counted backward from the Pulse Date - not from today.

Insider Acceleration

Shows whether insider purchasing activity is strengthening across recent, non-overlapping periods. For example, Capital and Buyer Acceleration compare the daily rate in Days 1-30 with Days 31-90; Recent Pulse compares Days 1-7 with Days 8-30. All comparison windows are counted backward from the Pulse Date—not from today.

Capital3.81xPurchase dollars/dayDays 1-30 / Days 31-90
Buyers1.00xDistinct buyers/dayDays 1-30 / Days 31-90
Events2.00xPurchase events/dayDays 1-30 / Days 31-90
Conviction3.81xDollars per distinct buyerDays 1-30 / Days 31-90
Recent Pulse3.12xPurchase dollars/dayDays 1-7 / Days 8-30
New AccelerationNoPurchases in Days 1-30with none in Days 31-90

Insider Details

All transactions shown are qualifying purchases. This report does not track sales, option exercises, or other transaction types.

2026-05-18MOULDER LEON O JRDirector / Chief Executive Officer60,000$16.88$1,012,800
0001104659-26-063362
2026-04-29MOULDER LEON O JRDirector / Chief Executive Officer35,000$17.62$616,700
0001104659-26-051889
2026-04-28MOULDER LEON O JRDirector / Chief Executive Officer25,000$18.02$450,500
0001104659-26-051889
2026-03-31Lu HongboDirector3,768$18.63$70,198
0001104659-26-039240
2026-03-31MOULDER LEON O JRDirector / Chief Executive Officer34,000$19.31$656,540
0001104659-26-038031
2026-03-30MOULDER LEON O JRDirector / Chief Executive Officer20,000$18.23$364,600
0001104659-26-038031
2026-02-13Allen Patricia LDirector4,160$26.36$109,658
0001104659-26-015342
2026-02-12Allen Patricia LDirector5,000$26.50$132,500
0001104659-26-015342
2026-02-12Allen Patricia LDirector5,700$24.34$138,738
0001104659-26-015342
2026-02-12Allen Patricia LDirector5,000$23.77$118,850
0001104659-26-015342
2026-02-11Lu HongboDirector25,985$22.50$584,662
0001104659-26-015387
2026-02-02MOULDER LEON O JRDirector / Chief Executive Officer57,000$17.96$1,023,720
0001104659-26-009756
2026-01-09MOULDER LEON O JRDirector / Chief Executive Officer20,000$16.55$331,000
0001104659-26-002589
2026-01-08MOULDER LEON O JRDirector / Chief Executive Officer30,000$16.30$489,000
0001104659-26-002589
2026-01-07MOULDER LEON O JRDirector / Chief Executive Officer50,000$16.38$819,000
0001104659-26-002589

15 of 15 purchases · All qualifying purchases in the 180-day lookback are shown.

What is a qualifying insider purchase?

A qualifying insider purchase is a reported Form 4 transaction in which a company insider acquires eligible publicly traded common shares using personal capital. Each transaction must pass these controls:

  • Security class: The security must be eligible publicly traded common stock—not preferred shares, derivatives, options, warrants, or another non-common-stock interest.
  • Amendment lineage: Original and amended Form 4 filings are linked so a correction is not counted as an additional purchase.
  • Duplicate event: Repeated disclosures of the same economic transaction are consolidated and counted once.
  • Purchase channel: The transaction must be a qualifying purchase that represents the insider's personal capital commitment.

Private transactions, derivatives, employee-plan acquisitions, option exercises, gifts, sales, and unresolved transactions are excluded. This report therefore focuses only on verified purchases that represent an insider's direct economic commitment to the company.

Research evidence only; not an investment recommendation. Source dates and point-in-time boundaries are displayed so evidence available on the Pulse Date remains distinct from later monitoring.

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