ECOLAB INC (ECL) Stock Institutional Trading Activity
ECOLAB INC (ECL) position changes reported by tracked institutional filers across multiple SEC 13F reporting periods. Based on recent SEC 13F filings (Q4 2025), investors with some of the largest reported share count changes include Jensen Investment Management, Mairs & Power Growth Fund, Cullen Value Fund, Cantillon Capital Management, and Renaissance Technologies LLC. Explore insights into buying and selling patterns, position changes, and investment conviction levels to understand institutional trading behavior and market dynamics.
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| Portfolio quarter | Name | Type | Quantity | Remaining | Reported stock balance |
|---|---|---|---|---|---|
| Q4 2017 | Torray Fund | Buy | 1,500 | 1,500 | $201 |
| Q4 2017 | Mairs & Power Growth Fund | Sell | -2,722 | 2,781,523 | $373,225 |
| Q4 2017 | Eagle Capital Management | Sell | -23,728 | 8,726,867 | $1,170,971 |
| Q4 2017 | Renaissance Technologies LLC | Sell | -403,100 | 70,722 | $9,489 |
| Q4 2017 | AKO Capital | Buy | 57,006 | 205,311 | $27,549 |
| Q4 2017 | Jensen Investment Management | Buy | 13,405 | 2,534,985 | $340,144 |
| Q4 2017 | Cantillon Capital Management | Sell | -177,993 | 2,595,000 | $348,197 |
| Q4 2017 | Eagle Capital Management | Sell | -174 | 21,848 | $2,932 |
| Q3 2017 | Jensen Investment Management | Sell | -18,860 | 2,521,580 | $324,300 |
| Q3 2017 | Mairs & Power Growth Fund | Buy | 25,735 | 2,784,245 | $358,082 |
| Q3 2017 | Eagle Capital Management | Buy | 26,784 | 8,750,595 | $1,125,414 |
| Q3 2017 | AKO Capital | Buy | 148,305 | 148,305 | $19,074 |
| Q3 2017 | Cantillon Capital Management | Sell | -85,971 | 2,772,993 | $356,634 |
| Q3 2017 | Eagle Capital Management | Sell | -262 | 22,022 | $2,832 |
| Q3 2017 | Wedgewood Partners | Sell | -3,150 | 2,500 | $321 |
| Q2 2017 | Jensen Investment Management | Sell | -68,955 | 2,540,440 | $337,243 |
| Q2 2017 | Mairs & Power Growth Fund | Buy | 30,055 | 2,758,510 | $366,192 |
| Q2 2017 | Eagle Capital Management | Sell | -58,404 | 8,723,811 | $1,158,086 |
| Q2 2017 | Parnassus Endeavor Fund | Buy | 110,000 | 410,000 | $54,428 |
| Q2 2017 | Wedgewood Partners | Sell | -72 | 5,650 | $750 |
| Q2 2017 | Cantillon Capital Management | Sell | -121,430 | 2,858,964 | $379,528 |
| Q2 2017 | Eagle Capital Management | Sell | -381 | 22,284 | $2,958 |
| Q1 2017 | Jensen Investment Management | Sell | -4,370 | 2,609,395 | $327,062 |
| Q1 2017 | Mairs & Power Growth Fund | Buy | 165,725 | 2,728,455 | $341,985 |
| Q1 2017 | Eagle Capital Management | Buy | 33,247 | 8,782,215 | $1,100,763 |
| Q1 2017 | Parnassus Endeavor Fund | Buy | 75,000 | 300,000 | $37,602 |
| Q1 2017 | Renaissance Technologies LLC | Buy | 334,200 | 473,822 | $59,389 |
| Q1 2017 | Cantillon Capital Management | Sell | -22,057 | 2,980,394 | $373,563 |
| Q1 2017 | Eagle Capital Management | Sell | -4,646 | 22,665 | $2,841 |
| Q4 2016 | Mairs & Power Growth Fund | Buy | 60,752 | 2,562,730 | $300,403 |
Frequently asked questions about ECL activity
Which institutional owners are buying ECL?
Institutional owners buying ECL include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.
What does "buy" mean in ECL activity?
"Buy" means an investor increased their reported position in ECL compared to the prior reporting period. This reflects growing exposure to ECOLAB INC (ECL) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).
Is institutional interest in ECL increasing?
Institutional interest in ECL can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.