S&CO INC ECL — ECOLAB INC COM COMMON

Ownership history in S&CO INC  ·  66 quarters on record

AI Ownership Summary

S&CO INC reported ECOLAB INC COM COMMON (ECL) in 66 quarterly 13F filings from 2023 Q4 through 2025 Q4. Peak portfolio weight reached 3.96% in 2025 Q2. The latest visible filing shows ECL at 3.70% of the fund.

This page tracks quarterly shares, estimated market value, portfolio weight, filing dates, and disclosure-aligned stock prices directly from SEC EDGAR 13F filings. Older history is available after unlock; the visible window still shows the most recent pattern.

What this ECL ownership page tells you

This page is designed to answer the real investor question behind a 13F filing: how meaningful was S&CO INC's position in ECOLAB INC COM COMMON, and how did that conviction change over time? You can read the holding window, peak weight, latest reported size, disclosure timing, and quarter-by-quarter changes without piecing the story together from raw SEC rows.

Freshest filing
Latest Reported Filing
2025 Q4

ECL was reported at 3.70% of portfolio in the most recent visible filing.

High-water mark
Peak Conviction
3.96% in 2025 Q2

Peak weight helps separate a token disclosure from a real conviction holding the fund genuinely cared about.

Time in book
Holding Window
2023 Q4 to 2025 Q4

Longer holding windows often tell a very different story from short-lived tactical trades or one-quarter experiments.

Decision context
Why It Matters
Position size beats headlines

Knowing that a fund owned a stock is useful. Knowing whether it was a 0.20% placeholder or a true high-conviction position is where the signal actually starts.

ECL stock page S&CO INC fund profile S&CO INC full holdings
How S&CO INC held ECL — position size vs. price
% of Fund (quarterly)    ECL price (quarter-end, indexed to 100)    SPY (indexed to 100)    QQQ (indexed to 100)
📋 Quarterly Holdings History 9 quarters  ▾
Quarter Action Sold % After 3M Timing Shares Change Chg % % of Fund Mkt Value Filed Price (Filed)
2025 Q4 REDUCED — — — 227,070 -1,485 -0.6% 3.70% $59.6M 2026-02-14 (Est.) $298.37
2025 Q3 REDUCED — — — 228,555 -857 -0.4% 3.83% $62.6M 2025-11-06 $251.68
2025 Q2 REDUCED — — — 229,412 -1,671 -0.7% 3.96% $61.8M 2025-08-07 $267.65
2025 Q1 REDUCED — — — 231,083 -395 -0.2% 3.93% $58.6M 2025-05-08 $250.80
2024 Q4 REDUCED — — — 231,478 -744 -0.3% 3.68% $54.2M 2025-02-07 $244.23
2024 Q3 ADDED — — — 232,222 +1,710 +0.7% 3.87% $59.3M 2024-11-07 $242.49
2024 Q2 REDUCED — — — 230,512 -4,239 -1.8% 3.83% $54.9M 2024-08-08 $232.98
2024 Q1 REDUCED — — — 234,751 -504 -0.2% 3.82% $54.2M 2024-05-09 $228.92
2023 Q4 REDUCED — — — 235,255 -930 -0.4% 3.58% $46.7M 2024-02-12 $198.43
57 older quarters hidden  —  Sign in free or upgrade to Premium to see full history

🏢 Other funds also holding ECL

As of 2026 Q1 — sorted by position size

WORMSER FRERES GESTION 5.7% MCDONALD CAPITAL INVESTORS INC/CA 3Y 7Y 5.32% Foresight Group Ltd Liability Partnership 4.67% DUDLEY & SHANLEY, INC. 3Y 7Y 4.57% McCollum Christoferson Group LLC 3Y 7Y 3.81% MCDANIEL TERRY & CO 3Y 7Y 3.71% FIRETRAIL INVESTMENTS PTY LTD 3.53% Birch Hill Investment Advisors LLC 3Y 7Y 3.46% Capital Investment Services of America, Inc. 3Y 7Y 3.1% Ayrshire Capital Management LLC 3Y 2.98%

FAQ About S&CO INC and ECL

These are the practical questions this page is built to answer before you even open the full history table.

How long has S&CO INC reported owning ECL?

S&CO INC reported ECL across 9 quarterly 13F filings, from 2023 Q4 through 2025 Q4.

What was the largest reported ECL position in S&CO INC's portfolio?

The largest reported portfolio weight for ECL was 3.96% in 2025 Q2.

What is the latest reported ECL position on this page?

The most recent filing on this page is 2025 Q4, when S&CO INC reported 227,070 shares, equal to 3.70% of portfolio, with an estimated market value of $59.6M.

What does the chart on this ECL ownership page compare?

The chart compares S&CO INC's quarterly ECL portfolio weight with the stock's indexed share price, so you can see whether the fund was building, trimming, or holding the position as price moved.

How well did S&CO INC time their ECL position?

Based on 13F filing dates vs. subsequent ECL price moves, S&CO INC correctly timed 30 out of 63 reported position changes (48%). The annualised alpha on ECL relative to SPY over the holding period was +0.6%.

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