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

AECOM

ACM · NYSE · CIK 0000868857 · Industrials · Engineering & Construction

INSIDER SIGNAL

61.4 / 100

3 buyers · 3 purchase transaction lines · $699.4K gross purchase

WHY THIS SIGNAL?

Buyer breadthModerate
Purchase sizeModerate
RoleModerate
RecencyLow
ConvictionStrong
Score anatomy

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

Cluster+21.0 / 35
Purchase size+16.1 / 25
Role+13.0 / 20
Recency+1.3 / 10
Conviction+10.0 / 10

What is holding the score back?

  • ⚠ Cluster breadth is moderate · 3 insider(s), not 4+
  • ⚠ Role scores low · most senior buyer: PRESIDENT (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
Poloni LaraPRESIDENT
●
Kapoor GauravCHIEF FINANCIAL OFFICER (PAO)
●
Rudd TroyCHIEF EXECUTIVE OFFICER
●
● Purchase▼ Sale○ Other

—

Purchase breadth & concentration

QUALIFYING BUYERS3
PURCHASE CONCENTRATION43%Largest buyer: Rudd Troy · $300.1K
CLUSTER BUYING · 15D2 insidersPeak activity: 2026-05-14–2026-05-14

Roles in the peak window: CHIEF EXECUTIVE OFFICER, CHIEF FINANCIAL OFFICER (PAO). Concentration uses priced qualifying P lines only and does not change the saved score.

SIGNAL HISTORY

61.4 / 100

Latest recorded score

→ +0.0 ptsversus the previous recorded snapshot
  1. 61.6
  2. 61.6
  3. 61.6
  4. 61.4
  5. 61.4

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

Recent Form 4 activity

3Purchases
4Sales
24Other Form 4 lines
15SEC filings · 365 days
BUYING3 qualifying P line(s) · 180 days
SELLING0 sale line(s) · context only
OTHER0 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
-5.7%
3M
-13.7%
6M
-29.1%
12M
-55.3%

Volatility & liquidity

Volatility
31.4%
Beta
—
Avg daily value
USD 116.1M

Valuation

Market cap
USD 7.6B
P/E
13.6×

Fundamentals

Profit margin
3.5%
ROE
22.5%
Industry
Engineering & Construction

Market data

Price data up to: 2026-10-11 · Price source: OpenBB/yfinance; volume from price cache (yfinance) · From SEC filings: Market cap, P/E, Profit margin, ROE · Fiscal year ended: 2025-09-30 · Market cap is the shares outstanding stated on the filing cover multiplied by the latest close. Share count date: 2026-08-07 · Status: PASS

Short interest

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

Shares short
5,936,614
Previous report
6,336,477
Avg daily volume
1,828,685
Days to cover
3.2

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
2026-06-16Poloni LaraPurchase (P)Common Stock4,224USD 70.63USD 298,341SEC filing ↗
2026-05-14Rudd TroyPurchase (P)Common Stock4,225USD 71.02USD 300,060SEC filing ↗
2026-05-14Kapoor GauravPurchase (P)Common Stock1,420USD 71.12USD 100,990SEC filing ↗
2020-08-26Buss Brad WPurchase (P)Common Stock13,000USD 38.56USD 501,280SEC filing ↗
2020-05-13Rudd TroyPurchase (P)Common Stock8,343USD 30.05USD 250,707SEC filing ↗

Form 4 evidence

31 transaction lines in the latest 365-day window; 238 in local history.

DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-06-16Poloni LaraPurchase (P)Common Stock4,224USD 70.63USD 298,341SEC filing ↗
2026-05-14Rudd TroyPurchase (P)Common Stock4,225USD 71.02USD 300,060SEC filing ↗
2026-05-14Kapoor GauravPurchase (P)Common Stock1,420USD 71.12USD 100,990SEC filing ↗
Show recent Form 4 evidence (26 grouped rows)
DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-06-16Poloni LaraPurchase (P)Common Stock4,224USD 70.63USD 298,341SEC filing ↗
2026-05-14Rudd TroyPurchase (P)Common Stock4,225USD 71.02USD 300,060SEC filing ↗
2026-05-14Kapoor GauravPurchase (P)Common Stock1,420USD 71.12USD 100,990SEC filing ↗
2026-03-03van 't Noordende Alexander MAward / grant (A)Common Stock2,002USD 0.00USD 0SEC filing ↗
2026-03-03Wolfenbarger Janet CarolAward / grant (A)Common Stock2,002USD 0.00USD 0SEC filing ↗
2026-03-03Tishman Daniel R.Award / grant (A)Common Stock2,002USD 0.00USD 0SEC filing ↗
2026-03-03Stotlar DouglasAward / grant (A)Common Stock2,236USD 0.00USD 0SEC filing ↗
2026-03-03Pipes KristyAward / grant (A)Common Stock2,002USD 0.00USD 0SEC filing ↗
2026-03-03KERR DEREK JAward / grant (A)Common Stock2,002USD 0.00USD 0SEC filing ↗
2026-03-03Buss Brad WAward / grant (A)Common Stock2,002USD 0.00USD 0SEC filing ↗
2025-12-23Rudd TroyGift (G)Common Stock600USD 0.00USD 0SEC filing ↗
2025-12-17Poloni LaraSale (S)Common Stock17,533USD 97.02USD 1,701,135SEC filing ↗
2025-12-17Gan David Y.Sale (S)Common Stock9,502USD 97.01USD 921,789SEC filing ↗
2025-12-15Rudd TroyOption exercise / conversion (M)Common Stock36,812USD 0.00USD 0SEC filing ↗
2025-12-15Rudd TroyTax withholding (F)Common Stock48,556USD 97.96USD 4,756,546SEC filing ↗
2025-12-15Rudd TroyAward / grant (A)Common Stock135,581USD 0.00USD 0SEC filing ↗
2025-12-15Poloni LaraOption exercise / conversion (M)Common Stock10,040USD 0.00USD 0SEC filing ↗
2025-12-15Poloni LaraTax withholding (F)Common Stock13,425USD 97.96USD 1,315,113SEC filing ↗
2025-12-15Poloni LaraAward / grant (A)Common Stock39,949USD 0.00USD 0SEC filing ↗
2025-12-15Kapoor GauravOption exercise / conversion (M)Common Stock9,562USD 0.00USD 0SEC filing ↗
2025-12-15Kapoor GauravTax withholding (F)Common Stock16,940USD 97.96USD 1,659,442SEC filing ↗
2025-12-15Kapoor GauravAward / grant (A)Common Stock37,599USD 0.00USD 0SEC filing ↗
2025-12-15Gan David Y.Sale (S)Common Stock6,000USD 98.85USD 593,100SEC filing ↗
2025-12-15Gan David Y.Option exercise / conversion (M)Common Stock5,976USD 0.00USD 0SEC filing ↗
2025-12-15Gan David Y.Tax withholding (F)Common Stock10,530USD 97.96USD 1,031,519SEC filing ↗
2025-12-15Gan David Y.Award / grant (A)Common Stock20,590USD 0.00USD 0SEC 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 · —
TickerACM
CIK0000868857
SectorIndustrials
IndustryEngineering & Construction Yahoo Finance
SEC SIC8711 Services-Engineering Services
ExchangeNYSE

Data coverage

Local Form 4 history238 transaction lines from 2020-01-27 to 2026-06-16
5 P purchase lines · 38 S sale lines · 195 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.