Insider · SEC Form 4 filer

David MacLennan

Past buys: 9 of 11 beat

Companies

Where they file as an insider

Caterpillar (CAT) Director Latest filing Nov 12, 2026
Ecolab (ECL) Director Latest filing Nov 12, 2026

Track record

Did their buys beat the typical stock?

Open-market buys16
Quarters checked 6 months later11
Beat the typical stock 9 of 11
Quarters too new to check4

9 of 11 checked quarters beat the typical stock. A past record is data, not a forecast.

Ecolab (ECL) Bought Nov 12, 2026 · $185K · 600 shares Too new Too new. Its 6-month check uses prices as of Jun 30, 2027.
Caterpillar (CAT) Bought Nov 12, 2026 · $209K · 350 shares Too new Too new. Its 6-month check uses prices as of Jun 30, 2027.
Ecolab (ECL) Bought May 4–13, 2026 · $456K · 1,800 shares Too new Too new. Its 6-month check uses prices as of Dec 31, 2026.
Caterpillar (CAT) Bought May 4, 2026 · $219K · 250 shares Too new Too new. Its 6-month check uses prices as of Dec 31, 2026.
Ecolab (ECL) Bought Dec 8, 2025 · $193K · 750 shares Beat typical Dec 31, 2025 $262.52 → Jun 30, 2026 $278.61 · +6.1% (typical stock +4.7%)
Caterpillar (CAT) Bought Nov 6, 2025 · $171K · 300 shares Beat typical Dec 31, 2025 $572.87 → Jun 30, 2026 $1064.90 · +85.9% (typical stock +4.7%)
Ecolab (ECL) Bought Aug 13, 2025 · $167K · 600 shares Beat typical Sep 30, 2025 $273.86 → Mar 31, 2026 $266.02 · −2.9% (typical stock −3.4%)
Caterpillar (CAT) Bought May 7, 2025 · $120K · 375 shares Beat typical Jun 30, 2025 $388.21 → Dec 31, 2025 $572.87 · +47.6% (typical stock +2.1%)
Ecolab (ECL) Bought May 7, 2025 · $126K · 500 shares Behind typical Jun 30, 2025 $269.44 → Dec 31, 2025 $262.52 · −2.6% (typical stock +2.1%)
Ecolab (ECL) Bought Feb 13, 2025 · $106K · 400 shares Beat typical Mar 31, 2025 $253.52 → Sep 30, 2025 $273.86 · +8.0% (typical stock +7.3%)
Ecolab (ECL) Bought Aug 2, 2024 · $156K · 650 shares Beat typical Sep 30, 2024 $255.33 → Mar 31, 2025 $253.52 · −0.7% (typical stock −7.5%)
Ecolab (ECL) Bought May 3, 2024 · $148K · 650 shares Behind typical Jun 30, 2024 $238.00 → Dec 31, 2024 $234.32 · −1.5% (typical stock +3.9%)
Caterpillar (CAT) Bought May 3, 2024 · $169K · 500 shares Beat typical Jun 30, 2024 $333.10 → Dec 31, 2024 $362.76 · +8.9% (typical stock +3.9%)
Caterpillar (CAT) Bought Feb 23, 2024 · $113K · 350 shares Beat typical Mar 31, 2024 $366.43 → Sep 30, 2024 $391.12 · +6.7% (typical stock +3.2%)
Ecolab (ECL) Bought Dec 1, 2023 · $153K · 800 shares Beat typical Dec 31, 2023 $198.35 → Jun 30, 2024 $238.00 · +20.0% (typical stock −1.2%)

Each row is one stock in one quarter, however many buys it took. We take the stock's price at the end of that quarter and again 6 months later, and compare it with the typical stock over the same dates. Prices are quarter-end values from funds' 13F reports (the middle value across 3 or more funds), through Sep 30, 2026. Moves past 3 times up or down, mostly stock splits, are left out. How we tested this.

Past results. This is data, not advice.

Where this data comes from. Insider trades, fund holdings, activist stakes and company results come from public SEC EDGAR filings (Forms 4, 13F, 13D/13G, 10-Q and 8-K). Congress trades come from the STOCK Act reports members file with the House Clerk and the Senate. Daily closing prices come from post-no-preference/stocks on DoltHub, a community-run database shared under CC BY-SA 4.0; the prices we show stay under that license. They are each day's close, not live or official exchange prices.

This is data, not investment advice. About StockToast · Your watchlist