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

Arqit Quantum Inc.

ARQQ · Nasdaq · CIK 0001859690 · Technology · Software—Infrastructure

INSIDER SIGNAL

No active buy signal

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

130 Form 4 transaction lines observed in the same window
35 sales · 95 option, withholding, award, gift or other lines

Last qualifying purchaseNo qualifying purchase is present in the local Form 4 history.

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.

Insider activity timeline

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

AprMayJunJulAugSepOct
Leaver AndrewChief Executive Officer
▼○○▼○○▼▼○▼
Ritchie GarthDirector
○▼○○○▼○▼▼
Willcocks PatrickGeneral Counsel
○▼○○▼○▼▼
Wilder Ben SimonChief Operating Officer
○▼○○▼○▼▼
Feenan PaulChief Revenue Officer
▼○○▼○▼▼
Nilan Nicholas WilliamGeneral Manager-US
○○▼○▼▼
● Purchase▼ Sale○ Other

Showing the six most active owners; 2 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.—

Recent Form 4 activity

0Purchases
42Sales
121Other Form 4 lines
61SEC filings · 365 days
BUYING0 qualifying P line(s) · 180 days
SELLING35 sale line(s) · context only
OTHER95 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 provides additional background on recent price performance and risk. It does not affect the Insider Signal.

Price performance

1M
-0.2%
3M
+10.2%
6M
+75.3%
12M
-58.1%

Volatility & liquidity

Volatility
147.0%
Beta
2.79
Avg daily value
USD 7.5M

Valuation

Market cap
USD 392.4M
P/E
—

Fundamentals

Profit margin
0.0%
ROE
-220.2%
Industry
Software—Infrastructure

Market data

Price data up to: 2026-10-07 · Price source: OpenBB/yfinance · From Yahoo Finance: Market cap, Profit margin, ROE · Status: PASS

Short interest

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

Shares short
2,261,064
Previous report
2,439,615
Avg daily volume
329,381
Days to cover
6.9

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

No qualifying code P equity purchase is present in the local Form 4 history.

Form 4 evidence

163 transaction lines in the latest 365-day window; 163 in local history.

DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-10-13Leaver AndrewSale (S)Ordinary Shares2,573USD 16.40USD 42,207SEC filing ↗
2026-10-12Leaver AndrewOption exercise / conversion (M)Ordinary Shares5,209USD 0.00USD 0SEC filing ↗
2026-10-06Willcocks PatrickSale (S)Ordinary Shares555USD 24.19USD 13,426SEC filing ↗
Show recent Form 4 evidence (30 grouped rows)
DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-10-13Leaver AndrewSale (S)Ordinary Shares2,573USD 16.40USD 42,207SEC filing ↗
2026-10-12Leaver AndrewOption exercise / conversion (M)Ordinary Shares5,209USD 0.00USD 0SEC filing ↗
2026-10-06Willcocks PatrickSale (S)Ordinary Shares555USD 24.19USD 13,426SEC filing ↗
2026-10-06Wilder Ben SimonSale (S)Ordinary Shares218USD 24.19USD 5,274SEC filing ↗
2026-10-06Ritchie GarthSale (S)Ordinary Shares118USD 24.19USD 2,855SEC filing ↗
2026-10-06Nilan Nicholas WilliamSale (S)Ordinary Shares493USD 24.19USD 11,926SEC filing ↗
2026-10-06Leaver AndrewSale (S)Ordinary Shares2,398USD 24.19USD 58,011SEC filing ↗
2026-10-06Feenan PaulSale (S)Ordinary Shares504USD 24.19USD 12,193SEC filing ↗
2026-10-05Willcocks PatrickSale (S)Ordinary Shares588USD 23.78USD 13,985SEC filing ↗
2026-10-05Willcocks PatrickOption exercise / conversion (M)Ordinary Shares1,148USD 0.00USD 0SEC filing ↗
2026-10-05Wilder Ben SimonSale (S)Ordinary Shares233USD 23.78USD 5,542SEC filing ↗
2026-10-05Wilder Ben SimonOption exercise / conversion (M)Ordinary Shares443USD 0.00USD 0SEC filing ↗
2026-10-05Ritchie GarthSale (S)Ordinary Shares127USD 23.78USD 3,021SEC filing ↗
2026-10-05Ritchie GarthOption exercise / conversion (M)Ordinary Shares165USD 0.00USD 0SEC filing ↗
2026-10-05Nilan Nicholas WilliamSale (S)Ordinary Shares522USD 23.78USD 12,416SEC filing ↗
2026-10-05Nilan Nicholas WilliamOption exercise / conversion (M)Ordinary Shares959USD 0.00USD 0SEC filing ↗
2026-10-05Lefebvre d'Ovidio ManfrediOption exercise / conversion (M)Ordinary Shares1,276USD 0.00USD 0SEC filing ↗
2026-10-05Leaver AndrewSale (S)Ordinary Shares2,535USD 23.78USD 60,294SEC filing ↗
2026-10-05Leaver AndrewOption exercise / conversion (M)Ordinary Shares5,208USD 0.00USD 0SEC filing ↗
2026-10-05Leaver AndrewJ (J)Ordinary Shares8,027USD 8.59USD 68,969SEC filing ↗
2026-10-05Feenan PaulSale (S)Ordinary Shares533USD 23.78USD 12,677SEC filing ↗
2026-10-05Feenan PaulOption exercise / conversion (M)Ordinary Shares1,034USD 0.00USD 0SEC filing ↗
2026-10-05Calabria CarloOption exercise / conversion (M)Ordinary Shares165USD 0.00USD 0SEC filing ↗
2026-10-02Willcocks PatrickSale (S)Ordinary Shares557USD 24.47USD 13,632SEC filing ↗
2026-10-02Willcocks PatrickOption exercise / conversion (M)Ordinary Shares1,148USD 0.00USD 0SEC filing ↗
2026-10-02Wilder Ben SimonSale (S)Ordinary Shares221USD 24.47USD 5,409SEC filing ↗
2026-10-02Wilder Ben SimonOption exercise / conversion (M)Ordinary Shares445USD 0.00USD 0SEC filing ↗
2026-10-02Ritchie GarthSale (S)Ordinary Shares81USD 24.47USD 1,982SEC filing ↗
2026-10-02Ritchie GarthOption exercise / conversion (M)Ordinary Shares167USD 0.00USD 0SEC filing ↗
2026-10-02Nilan Nicholas WilliamSale (S)Ordinary Shares494USD 24.47USD 12,090SEC 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 · —
TickerARQQ
CIK0001859690
SectorTechnology
IndustrySoftware—Infrastructure Yahoo Finance
SEC SIC7372 Services-Prepackaged Software
ExchangeNasdaq

Data coverage

Local Form 4 history163 transaction lines from 2026-04-01 to 2026-10-13
0 P purchase lines · 42 S sale lines · 121 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.