Stock Trading Canary

United States · SEC Form 4 · Snapshot date: 2026-10-19 · Built: 2026-10-19 · 中文

← United States · Coverage record

US · SEC FORM 4

Ultra Clean Holdings, Inc.

UCTT · Nasdaq · CIK 0001275014 · Technology · Semiconductor Equipment & Materials

INSIDER SIGNAL

No active buy signal

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

123 Form 4 transaction lines observed in the same window
85 sales · 38 option, withholding, award, gift or other lines

Last qualifying purchase2025-03-07 · Bentinck Bill · $75.5K

WHY NO ACTIVE SIGNAL?

Purchase activityNone
Recent buyingNone
Recent salesHigh
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.

Purchase breadth, concentration & cluster buying

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

Insider activity timeline

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

AprMayJunJulAugSepOct
HARDING BRIAN EChief Accounting Officer
○▼○▼○▼
Cook Christopher SPresident, Products Division
○▼▼○○
Savage SheriCFO
○○▼▼
Cho Paul YoonkuGeneral Counsel and Secretary
○▼○▼
McKibben Jeffrey L.Chief Information Officer
○▼▼○
Palfrey Jamie J.SVP, Global Human Resources
○▼○
● Purchase▼ Sale○ Other

Showing the six most active owners; 11 additional owner(s) remain in Form 4 evidence.

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: 2025-03-07 · Bentinck Bill.

Recent Form 4 activity

0Purchases
86Sales
41Other Form 4 lines
42SEC filings · 365 days
BUYING0 qualifying P line(s) · 180 days
SELLING85 sale line(s) · context only
OTHER38 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
3,714,027
Previous report
3,618,539
Avg daily volume
837,076
Days to cover
4.4

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
2025-03-07MADDOCK ERNEST EPurchase (P)Common Stock10,000USD 24.29USD 242,900SEC filing ↗
2025-03-07HARDING BRIAN EPurchase (P)Common Stock4,000USD 24.00USD 96,000SEC filing ↗
2025-03-07GRANGER CLARENCE LPurchase (P)Common Stock1,000USD 25.15USD 25,150SEC filing ↗
2025-03-07Cook Christopher SPurchase (P)Common Stock4,100USD 25.30USD 103,730SEC filing ↗
2025-03-07Bentinck BillPurchase (P)Common Stock3,000USD 25.17USD 75,510SEC filing ↗
2024-11-15Bajwa HarjinderPurchase (P)Common Stock10,000USD 33.75USD 337,500SEC filing ↗
2024-11-13Bajwa HarjinderPurchase (P)Common Stock15,000USD 34.83USD 522,500SEC filing ↗
2024-10-31Bajwa HarjinderPurchase (P)Common Stock2,500USD 33.33USD 83,325SEC filing ↗
2022-05-03Scholhamer James PPurchase (P)Common Stock676USD 32.00USD 21,632SEC filing ↗

Form 4 evidence

127 transaction lines in the latest 365-day window; 546 in local history.

DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-09-30Xiao JinsongTax withholding (F)Common Stock19,188USD 81.06USD 1,555,379SEC filing ↗
2026-08-31Keogh Michael DennisAward / grant (A)Common Stock20,917USD 0.00USD 0SEC filing ↗
2026-08-31Cook Christopher STax withholding (F)Common Stock12,497USD 67.83USD 847,672SEC filing ↗
Show recent Form 4 evidence (30 grouped rows)
DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-09-30Xiao JinsongTax withholding (F)Common Stock19,188USD 81.06USD 1,555,379SEC filing ↗
2026-08-31Keogh Michael DennisAward / grant (A)Common Stock20,917USD 0.00USD 0SEC filing ↗
2026-08-31Cook Christopher STax withholding (F)Common Stock12,497USD 67.83USD 847,672SEC filing ↗
2026-07-02HARDING BRIAN ESale (S)Common Stock3,837USD 128.75USD 494,023SEC filing ↗
2026-06-26HARDING BRIAN EAward / grant (A)Common Stock9,363USD 0.00USD 0SEC filing ↗
2026-06-04Savage SheriSale (S)Common Stock14,421USD 89.45USD 1,289,915SEC filing ↗
2026-06-04Savage SheriSale (S)Common Stock15,766USD 89.47USD 1,410,556SEC filing ↗
2026-06-04HARDING BRIAN ESale (S)Common Stock16,988USD 89.47USD 1,519,892SEC filing ↗
2026-06-02Cho Paul YoonkuSale (S)Common Stock944USD 89.37USD 84,365SEC filing ↗
2026-05-27LIGGETT EMILY MSale (S)Common Stock8,198USD 92.18USD 755,692SEC filing ↗
2026-05-22Xiao JinsongAward / grant (A)Common Stock31,175USD 0.00USD 0SEC filing ↗
2026-05-22Wunar Robert AnthonyAward / grant (A)Common Stock10,732USD 0.00USD 0SEC filing ↗
2026-05-22Solomon JoanneAward / grant (A)Common Stock2,575USD 0.00USD 0SEC filing ↗
2026-05-22Seto Jacqueline A.Award / grant (A)Common Stock2,575USD 0.00USD 0SEC filing ↗
2026-05-22Savage SheriAward / grant (A)Common Stock26,392USD 0.00USD 0SEC filing ↗
2026-05-22Palfrey Jamie J.Award / grant (A)Common Stock9,897USD 0.00USD 0SEC filing ↗
2026-05-22McKibben Jeffrey L.Award / grant (A)Common Stock5,896USD 0.00USD 0SEC filing ↗
2026-05-22MADDOCK ERNEST EAward / grant (A)Common Stock2,575USD 0.00USD 0SEC filing ↗
2026-05-22LIGGETT EMILY MAward / grant (A)Common Stock2,575USD 0.00USD 0SEC filing ↗
2026-05-22Johnson Samuel WilliamsAward / grant (A)Common Stock5,567USD 0.00USD 0SEC filing ↗
2026-05-22IBNALE DAVID TAward / grant (A)Common Stock2,575USD 0.00USD 0SEC filing ↗
2026-05-22HARDING BRIAN EAward / grant (A)Common Stock8,412USD 0.00USD 0SEC filing ↗
2026-05-22GRANGER CLARENCE LAward / grant (A)Common Stock2,575USD 0.00USD 0SEC filing ↗
2026-05-22EDMAN THOMAS TAward / grant (A)Common Stock2,575USD 0.00USD 0SEC filing ↗
2026-05-22Cook Christopher SAward / grant (A)Common Stock13,196USD 0.00USD 0SEC filing ↗
2026-05-22Cho Paul YoonkuAward / grant (A)Common Stock8,041USD 0.00USD 0SEC filing ↗
2026-05-14McKibben Jeffrey L.Sale (S)Common Stock4,205USD 87.00USD 365,835SEC filing ↗
2026-05-08McKibben Jeffrey L.Sale (S)Common Stock2,500USD 86.48USD 216,200SEC filing ↗
2026-05-08Cho Paul YoonkuSale (S)Common Stock2,000USD 86.89USD 173,780SEC filing ↗
2026-05-05Palfrey Jamie J.Sale (S)Common Stock8,691USD 79.73USD 692,933SEC 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 date2026-10-19
Ranking versionUS-v1.2
Data qualityPASS ELIGIBLE · —
TickerUCTT
CIK0001275014
SectorTechnology
IndustrySemiconductor Equipment & Materials Yahoo Finance
SEC SIC3674 Semiconductors & Related Devices
ExchangeNasdaq

Data coverage

Local Form 4 history546 transaction lines from 2020-01-31 to 2026-09-30
11 P purchase lines · 178 S sale lines · 357 other lines
SEC company submissionsOpen SEC filings ↗

Local ledger as of 2026-10-19. Mapping status is an audit field and does not erase SEC filing evidence.