David MacLennan

Director · Ecolab

David MacLennan (Director) filed 4 Form 4 reports in the trailing twelve months (4 purchases, 0 sales), most often in Ecolab Inc. (ECL). Across 4 priced purchase filings, the average 21-session return was +2.7% from execution and +3.4% from disclosure (delay-adjusted; derived). The largest single filing was $251K of ECL (1,000 sh × $250.65, as filed), executed May 13. Data as of Nov 8 2026.

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Return, ttmiAverage return per filing, trailing twelve months

+2.7%

avg across 4 priced filings

Delay-adjustediThe same average, entered at disclosure dates

+3.4%

same 4 filings, from disclosure

Filings, ttm

4 buys · 0 sells

Median delay

execution → disclosure

Volume, ttmiDollar value disclosed in the trailing twelve months

$869K

shares × price, as filed

Last traded

May 13

Filed May 14

Median ADV $456.7M across their filed names

Impact on $10,000 · 12M

$11,598 (+16.0%)

S&P 500 $10,907 (+9.1%) · 6.9 pts ahead

David MacLennan S&P 500

Derived: compounded across filings from disclosure dates · past 12 months

Open performance→

Volume by month

Buys $1.6M Sells $0

Shares × price, as filed · by filing month · past 24 months

Sectors filed on

Basic Materials 3 filings Industrials 1 filing

Sector per market data · by filing · past 12 months

Most traded names

ECL

Ecolab Inc. ECL · 6 buys · 0 sells 6 filings CAT Caterpillar Inc. CAT · 3 buys · 0 sells 3 filings

Recent filings

ECLPURCHASE Ecolab Inc. View filing → $251K
1,000 sh × $250.65
Exec May 13
Filed May 14 · 5:03 PM ET ECLPURCHASE Ecolab Inc. View filing → $206K
800 sh × $256.91
Exec May 4
Filed May 5 · 5:27 PM ET CATPURCHASE Caterpillar Inc. View filing → $219K
250 sh × $876.84
Exec May 4
Filed May 5 · 2:00 PM ET ECLPURCHASE Ecolab Inc. View filing → $193K
750 sh × $257.60
Exec Dec 8 2025
Filed Dec 8 2025 · 4:25 PM ET CATPURCHASE Caterpillar Inc. View filing → $171K
300 sh × $568.86
Exec Nov 6 2025
Filed Nov 6 2025 · 3:15 PM ET ECLPURCHASE Ecolab Inc. View filing → $167K
600 sh × $278.51
Exec Aug 13 2025
Filed Aug 15 2025 · 4:43 PM ET CATPURCHASE Caterpillar Inc. View filing → $120K
375 sh × $320.70
Exec May 7 2025
Filed May 8 2025 · 5:30 PM ET ECLPURCHASE Ecolab Inc. View filing → $126K
500 sh × $251.75
Exec May 7 2025
Filed May 9 2025 · 5:30 PM ET More filings →