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

CERUS CORP

CERS · Nasdaq · CIK 0001020214 · Healthcare · Medical Devices

INSIDER SIGNAL

No active buy signal

0 qualifying P purchase groups
in the current 180-day scoring window

20 Form 4 transaction lines observed in the same window
9 sales · 11 option, withholding, award, gift or other lines

Last qualifying purchase2025-08-25 · Gregory Dean A. · $31.2K

WHY NO ACTIVE SIGNAL?

Purchase activityNone
Recent buyingNone
Recent salesModerate
Buy signal statusInactive
Score anatomy

No score is calculated because there is no qualifying purchase in the active window. Unavailable inputs are not treated as zero or as a bearish signal.

ClusterNot calculated
Purchase sizeNot calculated
RoleNot calculated
RecencyNot calculated
ConvictionNot calculated

Why is there no score?

  • No qualifying open-market purchase supplies cluster, size, role, recency or conviction inputs.
  • Sales and other Form 4 activity remain visible as context and do not create a negative score.

Sales and other Form 4 activity are shown separately and do not create a negative buy signal. Absence of buying is not scored as bearish.

Insider activity timeline

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

AprMayJunJulAugSepOct
Jayaraman Vivek KChief Operating Officer
▼▼○▼○▼
Jensen ChrystalChief Legal Officer
○▼▼
BJERKHOLT ERICDirector
○▼
Green Kevin DennisChief Financial Officer
○▼
Greenman William MarinerPresident and CEO
○▼
Lucena AnnDirector
○
● Purchase▼ Sale○ Other

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

Purchase breadth, concentration & cluster buying

These modules activate when qualifying purchases enter the 180-day research window.

SIGNAL HISTORY

No recorded active-signal snapshot

Scores are archived only when the company qualifies for a published US buy-signal snapshot. Last qualifying purchase: 2025-08-25 · Gregory Dean A..

Recent Form 4 activity

0Purchases
25Sales
24Other Form 4 lines
33SEC filings · 365 days
BUYING0 qualifying P line(s) · 180 days
SELLING9 sale line(s) · context only
OTHER11 exercise / withholding / award / gift / other lines
10b5-1 / PLANNEDNot assessed

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 has not been captured for this ticker yet. The daily market-context job processes the US universe in rotating batches.

Short interest

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

Shares short
17,580,423
Previous report
17,994,821
Avg daily volume
2,188,865
Days to cover
8.0

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
2025-08-25Gregory Dean A.Purchase (P)Common Stock25,000USD 1.25USD 31,250SEC filing ↗
2024-12-13Gregory Dean A.Purchase (P)Common Stock1,725USD 1.70USD 2,932SEC filing ↗
2024-05-13Shan HuaPurchase (P)Common Stock2,500USD 1.99USD 4,975SEC filing ↗
2024-05-10NACHTSHEIM JAMI KPurchase (P)Common Stock2,000USD 1.79USD 3,580SEC filing ↗
2024-05-09Witney FrankPurchase (P)Common Stock20,000USD 1.89USD 37,800SEC filing ↗
2024-05-09Swisher Daniel N JRPurchase (P)Common Stock2,500USD 1.88USD 4,700SEC filing ↗
2023-12-13BJERKHOLT ERICPurchase (P)Common Stock10,000USD 1.62USD 16,200SEC filing ↗
2023-08-22Lucena AnnPurchase (P)Common Stock7,500USD 1.69USD 12,675SEC filing ↗
2023-08-21BJERKHOLT ERICPurchase (P)Common Stock10,000USD 1.72USD 17,200SEC filing ↗
2023-05-26Swisher Daniel N JRPurchase (P)Common Stock5,000USD 1.91USD 9,550SEC filing ↗
2023-05-24SCHULZE GAILPurchase (P)Common Stock9,850USD 2.03USD 19,995SEC filing ↗
2023-05-23BJERKHOLT ERICPurchase (P)Common Stock5,000USD 2.00USD 10,000SEC filing ↗
2020-02-11MOORE TIMOTHY L.Purchase (P)Common Stock3,614USD 4.75USD 17,166SEC filing ↗
2020-01-29MOORE TIMOTHY L.Purchase (P)Common Stock—USD —USD —SEC filing ↗
2020-01-29Swisher Daniel N JRPurchase (P)Common Stock1,000USD 4.15USD 4,150SEC filing ↗

Form 4 evidence

49 transaction lines in the latest 365-day window; 465 in local history.

DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-08-17Jensen ChrystalSale (S)Common Stock30,000USD 2.98USD 89,400SEC filing ↗
2026-07-16Jayaraman Vivek KSale (S)Common Stock16,666USD 3.16USD 52,665SEC filing ↗
2026-07-01Jayaraman Vivek KAward / grant (A)Common Stock554,529USD 0.00USD 0SEC filing ↗
Show recent Form 4 evidence (30 grouped rows)
DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-08-17Jensen ChrystalSale (S)Common Stock30,000USD 2.98USD 89,400SEC filing ↗
2026-07-16Jayaraman Vivek KSale (S)Common Stock16,666USD 3.16USD 52,665SEC filing ↗
2026-07-01Jayaraman Vivek KAward / grant (A)Common Stock554,529USD 0.00USD 0SEC filing ↗
2026-06-30Jensen ChrystalSale (S)Common Stock24,329USD 2.94USD 71,527SEC filing ↗
2026-06-30Jensen ChrystalAward / grant (A)Common Stock55,000USD 0.00USD 0SEC filing ↗
2026-06-30Jayaraman Vivek KSale (S)Common Stock42,359USD 2.94USD 124,535SEC filing ↗
2026-06-30Jayaraman Vivek KAward / grant (A)Common Stock80,000USD 0.00USD 0SEC filing ↗
2026-06-30Greenman William MarinerSale (S)Common Stock101,919USD 2.94USD 299,642SEC filing ↗
2026-06-30Greenman William MarinerAward / grant (A)Common Stock192,500USD 0.00USD 0SEC filing ↗
2026-06-30Green Kevin DennisSale (S)Common Stock33,676USD 2.94USD 99,007SEC filing ↗
2026-06-30Green Kevin DennisAward / grant (A)Common Stock63,600USD 0.00USD 0SEC filing ↗
2026-06-09BJERKHOLT ERICSale (S)Common Stock20,454USD 2.60USD 53,180SEC filing ↗
2026-06-02Witney FrankAward / grant (A)Common Stock60,000USD 0.00USD 0SEC filing ↗
2026-06-02Shan HuaAward / grant (A)Common Stock60,000USD 0.00USD 0SEC filing ↗
2026-06-02NACHTSHEIM JAMI KAward / grant (A)Common Stock60,000USD 0.00USD 0SEC filing ↗
2026-06-02Lucena AnnAward / grant (A)Common Stock60,000USD 0.00USD 0SEC filing ↗
2026-06-02Gregory Dean A.Award / grant (A)Common Stock60,000USD 0.00USD 0SEC filing ↗
2026-06-02BJERKHOLT ERICAward / grant (A)Common Stock60,000USD 0.00USD 0SEC filing ↗
2026-05-29Jayaraman Vivek KSale (S)Common Stock16,667USD 3.00USD 50,001SEC filing ↗
2026-05-01Jayaraman Vivek KSale (S)Common Stock16,667USD 3.00USD 50,001SEC filing ↗
2026-04-01Jensen ChrystalAward / grant (A)Common Stock200,000USD 0.00USD 0SEC filing ↗
2026-04-01Green Kevin DennisAward / grant (A)Common Stock200,000USD 0.00USD 0SEC filing ↗
2026-03-12Jayaraman Vivek KSale (S)Common Stock165,200USD 1.66USD 274,232SEC filing ↗
2026-03-12Greenman William MarinerSale (S)Common Stock447,757USD 1.66USD 743,277SEC filing ↗
2026-03-12Green Kevin DennisSale (S)Common Stock127,544USD 1.66USD 211,723SEC filing ↗
2026-03-12Benjamin Richard JSale (S)Common Stock101,740USD 1.66USD 168,888SEC filing ↗
2026-03-09Benjamin Richard JSale (S)Common Stock40,426USD 1.88USD 76,001SEC filing ↗
2026-03-09Benjamin Richard JSale (S)Common Stock40,426USD 1.88USD 76,001SEC filing ↗
2026-03-06Benjamin Richard JSale (S)Common Stock24,235USD 2.01USD 48,712SEC filing ↗
2026-03-06Jensen ChrystalSale (S)Common Stock30,845USD 2.01USD 61,998SEC 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 · —
TickerCERS
CIK0001020214
SectorHealthcare
IndustryMedical Devices Yahoo Finance
SEC SIC3841 Surgical & Medical Instruments & Apparatus
ExchangeNasdaq

Data coverage

Local Form 4 history465 transaction lines from 2020-01-29 to 2026-08-17
20 P purchase lines · 198 S sale lines · 247 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.