Stock Trading Canary

United States · SEC Form 4 · Snapshot date: 2026-10-18 · Built: 2026-10-18 · 中文

← United States · Coverage record

US · SEC FORM 4

Zentalis Pharmaceuticals, Inc.

ZNTL · Nasdaq · CIK 0001725160 · Healthcare · Biotechnology

INSIDER SIGNAL

57.8 / 100

1 buyers · 1 purchase transaction lines · $15.2M gross purchase

WHY THIS SIGNAL?

Buyer breadthLow
Purchase sizeStrong
RoleModerate
RecencyLow
ConvictionStrong
Score anatomy

Each bar shows the contribution to the current score; the weights and formula stay unchanged.

Cluster+7.0 / 35
Purchase size+23.4 / 25
Role+14.0 / 20
Recency+3.4 / 10
Conviction+10.0 / 10

What is holding the score back?

  • ⚠ Cluster breadth is moderate · 1 insider(s), not 4+
  • ⚠ Role scores low · most senior buyer: TenPercentOwner (CEO, chair and 10% owners score lowest)
  • ⚠ Purchase activity is becoming less recent

Purchase-size comments are relative to the model scale. Average daily volume is a separate market-context diagnostic.

US-v1.2 ranks qualifying equity purchases under the current 180-day rules. The score is a research priority, not a return forecast or probability. Backtests have not shown that a higher US score is followed by better returns.

Insider activity timeline

Owner lanes show the latest 180 days. Symbol shape identifies the transaction type; sales remain context only.

AprMayJunJulAugSepOct
Walker Luke NathanielDirector
○
Skvarka JanDirector
○
Myers Scott DunsethDirector
○
Kariuki EnochDirector
○
Johnson David MichaelDirector
○
Campbell ShannonDirector
○
● Purchase▼ Sale○ Other

Showing the six most active owners; 2 additional owner(s) remain in Form 4 evidence.

Purchase breadth & concentration

QUALIFYING BUYERS1
PURCHASE CONCENTRATION100%Largest buyer: WALTERS GROUP; WALTERS SUSAN BERKLEY; WALTERS WILLIAM THURMAN · $15.2M
CLUSTER BUYING · 15D1 insiderPeak activity: 2026-08-14–2026-08-14

Roles in the peak window: TenPercentOwner. Concentration uses priced qualifying P lines only and does not change the saved score.

SIGNAL HISTORY

57.8 / 100

Latest recorded score

↓ -0.2 ptsversus the previous recorded snapshot
  1. 58.2
  2. 58.1
  3. 58.1
  4. 58.0
  5. 57.8

Only scores saved when a full US scoring run completed are shown; gaps are not reconstructed.

Recent Form 4 activity

2Purchases
10Sales
7Other Form 4 lines
14SEC filings · 365 days
BUYING1 qualifying P line(s) · 180 days
SELLING0 sale line(s) · context only
OTHER7 exercise / withholding / award / gift / other lines
10b5-1 / PLANNEDNot detected in parsed evidence

P is an open-market or private purchase. S is a sale. M, F, A and G usually describe exercises, tax withholding, awards and gifts. These categories remain visually separate.

Market context

Market context provides additional background on recent price performance and risk. It does not affect the Insider Signal.

Price performance

1M
-26.5%
3M
-42.9%
6M
-60.1%
12M
+61.0%

Volatility & liquidity

Volatility
112.1%
Beta
—
Avg daily value
USD 3.2M

Valuation

Market cap
USD 189.2M
P/E
—

Fundamentals

Profit margin
—
ROE
-63.4%
Industry
Biotechnology

Market data

Price data up to: 2026-10-11 · Price source: OpenBB/yfinance; volume from price cache (yfinance) · From SEC filings: Market cap, ROE · Fiscal year ended: 2025-12-31 · Market cap is the shares outstanding stated on the filing cover multiplied by the latest close. Share count date: 2026-08-03 · Status: PASS

Short interest

Short interest is external context reported to FINRA by broker-dealers. It does not affect the Insider Signal.

Shares short
5,957,612
Previous report
4,786,334
Avg daily volume
1,441,036
Days to cover
4.1

FINRA settlement date: 2026-09-30 · Captured 2026-10-12 · FINRA equity short interest ↗. A share count, published about a week after each of two settlement dates a month; not a percentage of shares outstanding.

Historical equity purchases

Qualifying code P transactions in the local Form 4 history, including purchases outside the current signal window.

Transaction dateReporting ownerTypeSecuritySharesAvg. priceApprox. valueSource
2026-08-14WALTERS GROUP; WALTERS SUSAN BERKLEY; WALTERS WILLIAM THURMANPurchase (P)Common Stock4,335,000USD 3.50USD 15,172,500SEC filing ↗
2025-12-31WALTERS GROUP; WALTERS SUSAN BERKLEY; WALTERS WILLIAM THURMANPurchase (P)Common Stock6,459,973USD 1.20USD 7,751,968SEC filing ↗
2025-04-30Myers Scott DunsethPurchase (P)Common Stock21,000USD 1.40USD 29,400SEC filing ↗
2025-02-06Bruns IngmarPurchase (P)Common Stock20,000USD 2.28USD 45,600SEC filing ↗
2025-01-31Walker Luke NathanielPurchase (P)Common Stock14,200USD 1.76USD 24,992SEC filing ↗
2025-01-31Skvarka JanPurchase (P)Common Stock60,000USD 1.72USD 103,200SEC filing ↗
2025-01-31EASTLAND JULIA MARIEPurchase (P)Common Stock28,500USD 1.73USD 49,305SEC filing ↗
2023-11-13Blackwell KimberlyPurchase (P)Common Stock5,000USD 10.29USD 51,450SEC filing ↗
2023-11-10Johnson David MichaelPurchase (P)Common Stock17,000USD 9.88USD 167,960SEC filing ↗
2023-06-20GOEL DAVID E.; Matrix Capital Management Company, LPPurchase (P)Common Stock, par value $0.001 per share4,760,000USD 22.66USD 107,861,600SEC filing ↗
2021-08-19Epperly Melissa B,Purchase (P)Common Stock8,285USD 52.00USD 430,820SEC filing ↗
2021-08-18Epperly Melissa B,Purchase (P)Common Stock1,326USD 52.00USD 68,952SEC filing ↗
2020-04-07Johnson David MichaelPurchase (P)Common Stock4,000USD 18.00USD 72,000SEC filing ↗
2020-04-07SUN ANTHONY YPurchase (P)Common Stock888USD 18.00USD 15,984SEC filing ↗
2020-04-07Epperly Melissa B,Purchase (P)Common Stock20,000USD 18.00USD 360,000SEC filing ↗

Form 4 evidence

19 transaction lines in the latest 365-day window; 560 in local history.

DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-09-30Bruns IngmarAward / grant (A)Common Stock9,727USD 2.18USD 21,205SEC filing ↗
2026-08-14WALTERS GROUP; WALTERS SUSAN BERKLEY; WALTERS WILLIAM THURMANPurchase (P)Common Stock4,335,000USD 3.50USD 15,172,500SEC filing ↗
2026-06-16Walker Luke NathanielAward / grant (A)Common Stock57,100USD 0.00USD 0SEC filing ↗
Show recent Form 4 evidence (19 grouped rows)
DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-09-30Bruns IngmarAward / grant (A)Common Stock9,727USD 2.18USD 21,205SEC filing ↗
2026-08-14WALTERS GROUP; WALTERS SUSAN BERKLEY; WALTERS WILLIAM THURMANPurchase (P)Common Stock4,335,000USD 3.50USD 15,172,500SEC filing ↗
2026-06-16Walker Luke NathanielAward / grant (A)Common Stock57,100USD 0.00USD 0SEC filing ↗
2026-06-16Skvarka JanAward / grant (A)Common Stock57,100USD 0.00USD 0SEC filing ↗
2026-06-16Myers Scott DunsethAward / grant (A)Common Stock57,100USD 0.00USD 0SEC filing ↗
2026-06-16Kariuki EnochAward / grant (A)Common Stock57,100USD 0.00USD 0SEC filing ↗
2026-06-16Johnson David MichaelAward / grant (A)Common Stock57,100USD 0.00USD 0SEC filing ↗
2026-05-26Campbell ShannonAward / grant (A)Common Stock114,200USD 0.00USD 0SEC filing ↗
2026-02-10Vultaggio VincentSale (S)Common Stock6,894USD 2.42USD 16,683SEC filing ↗
2026-02-09Vultaggio VincentSale (S)Common Stock3,379USD 2.39USD 8,076SEC filing ↗
2026-02-09EASTLAND JULIA MARIESale (S)Common Stock889USD 2.39USD 2,125SEC filing ↗
2026-02-09Bruns IngmarSale (S)Common Stock335USD 2.39USD 801SEC filing ↗
2026-02-06Vultaggio VincentSale (S)Common Stock29,951USD 2.43USD 72,781SEC filing ↗
2026-02-06EASTLAND JULIA MARIESale (S)Common Stock7,866USD 2.43USD 19,114SEC filing ↗
2026-02-06Bruns IngmarSale (S)Common Stock2,962USD 2.43USD 7,198SEC filing ↗
2026-02-03Vultaggio VincentSale (S)Common Stock556USD 2.52USD 1,401SEC filing ↗
2026-02-02Vultaggio VincentSale (S)Common Stock2,540USD 2.55USD 6,477SEC filing ↗
2025-12-31WALTERS GROUP; WALTERS SUSAN BERKLEY; WALTERS WILLIAM THURMANPurchase (P)Common Stock6,459,973USD 1.20USD 7,751,968SEC filing ↗
2025-12-15GOEL DAVID E.; Matrix Capital Management Company, LPSale (S)Common Stock, par value $0.001 per share7,500,000USD 1.33USD 9,975,000SEC filing ↗

Multiple price lines in one filing are grouped and share-weighted. Price and value are blank when a grouped filing line lacks price evidence.

Snapshot & identity

Snapshot date2026-10-18
Ranking versionUS-v1.2
Data qualityPASS ELIGIBLE · —
TickerZNTL
CIK0001725160
SectorHealthcare
IndustryBiotechnology Yahoo Finance
SEC SIC2834 Pharmaceutical Preparations
ExchangeNasdaq

Data coverage

Local Form 4 history560 transaction lines from 2020-04-07 to 2026-09-30
17 P purchase lines · 451 S sale lines · 92 other lines
SEC company submissionsOpen SEC filings ↗

Local ledger as of 2026-10-18. Mapping status is an audit field and does not erase SEC filing evidence.