Michael Larson
Director at Ecolab Inc. (ECL)
Michael Larson has filed 73 insider reports with the SEC since January 2021, as director at Ecolab Inc. (ECL), director at Republic Services, Inc. (RSG) and director at Mexican Economic Development Inc (FMX) and at 2 more companies. Michael Larson made no open-market purchases or sales in the last 12 months. The latest filing, on October 2, 2026, reports grant or award at Ecolab Inc. (ECL).
- Filings
- 73
- Companies
- 5
- Bought on market
- $244K
- Sold on market
- None
Companies where Michael Larson is an insider
| Company | Role | Shares held | Bought | Sold | Avg buy | Price now | Last filing |
|---|---|---|---|---|---|---|---|
| ECL Ecolab Inc. | Director | 19,326 | $306.74 | Oct 2, 2026 | |||
| RSG Republic Services, Inc. | Director | 58,427 | $246.78 | Jul 17, 2026 | |||
| FMX Mexican Economic Development Inc | Directorsince March 2026 | $131.27 | Mar 17, 2026 | ||||
| WIW Western Asset Inflation-Linked Opportunities & Income Fund | Director | 14,547 | $92.3K | $9.23 | $8.07-13% | Sep 28, 2023 | |
| WIA Western Asset Inflation-Linked Income Fund | Director | 21,268 | $152K | $8.42 | $7.75-8.0% | Sep 28, 2023 |
Shares held: common shares owned directly after the latest filing that states it. Avg buy: open-market purchase dollars divided by shares bought, every filing on record. Price now: the latest daily close, against the average buy price.
Every filing
- Sep 30, 2026ECLDirector Larson Michael was granted 131 shares, increasing direct ownership by 0.68% to 19,326 unitsForm 4Grant or award
- Jul 15, 2026RSGSEC Form 4 filed by Director Larson MichaelForm 4Grant or award
- Jun 30, 2026ECLDirector Larson Michael was granted 130 shares, increasing direct ownership by 0.68% to 19,166 unitsForm 4Grant or award
- May 15, 2026ECLSEC Form 4 filed by Director Larson MichaelForm 4Grant or award
- Apr 15, 2026RSGSEC Form 4 filed by Larson MichaelForm 4Grant or award
- Mar 31, 2026ECLSEC Form 4 filed by Larson MichaelForm 4Grant or award
- Mar 27, 2026ECLSEC Form 4 filed by Larson MichaelForm 4Shares withheld for taxes or exercise priceExercise or conversion of a derivative
- Mar 16, 2026FMXNew insider Larson Michael claimed ownership of 65,000 units of BD UnitsForm 3New insider
- Jan 31, 2026RSGDirector Larson Michael converted options into 1,858 shares, increasing direct ownership by 3% to 58,427 unitsForm 4Exercise or conversion of a derivative
- Jan 15, 2026RSGSEC Form 4 filed by Director Larson MichaelForm 4Grant or award
- Jan 2, 2026RSGSEC Form 4 filed by Director Larson MichaelForm 4Grant or award
- Dec 31, 2025ECLDirector Larson Michael was granted 128 shares, increasing direct ownership by 0.73% to 17,548 unitsForm 4Grant or award
- Oct 15, 2025RSGSEC Form 4 filed by Director Larson MichaelForm 4Grant or award
- Sep 30, 2025ECLDirector Larson Michael was granted 123 shares, increasing direct ownership by 0.71% to 17,396 unitsForm 4Grant or award
- Jul 15, 2025RSGSEC Form 4 filed by Director Larson MichaelForm 4Grant or award
- Jun 30, 2025ECLDirector Larson Michael was granted 126 shares, increasing direct ownership by 0.74% to 17,248 unitsForm 4Grant or award
- May 12, 2025ECLSEC Form 4 filed by Director Larson MichaelForm 4Grant or award
- Apr 15, 2025RSGSEC Form 4 filed by Director Larson MichaelForm 4Grant or award
- Mar 31, 2025ECLDirector Larson Michael was granted 134 shares, increasing direct ownership by 0.79% to 17,095 unitsForm 4Grant or award
- Mar 4, 2025ECLDirector Larson Michael exercised 2,200 shares at a strike of $112.75 and covered exercise/tax liability with 921 shares, increasing direct ownership by 8% to 16,934 unitsForm 4Shares withheld for taxes or exercise priceExercise or conversion of a derivative
- Jan 31, 2025RSGDirector Larson Michael converted options into 1,775 shares, increasing direct ownership by 3% to 56,569 unitsForm 4Exercise or conversion of a derivative
- Jan 15, 2025RSGSEC Form 4 filed by Director Larson MichaelForm 4Grant or award
- Jan 2, 2025RSGSEC Form 4 filed by Director Larson MichaelForm 4Grant or award
- Dec 31, 2024ECLDirector Larson Michael was granted 144 shares, increasing direct ownership by 0.93% to 15,655 unitsForm 4Grant or award
- Oct 15, 2024RSGSEC Form 4 filed by Director Larson MichaelForm 4Grant or award
- Sep 30, 2024ECLDirector Larson Michael was granted 133 shares, increasing direct ownership by 0.86% to 15,490 unitsForm 4Grant or award
- Jul 15, 2024RSGSEC Form 4 filed by Director Larson MichaelForm 4Grant or award
- Jun 30, 2024ECLDirector Larson Michael was granted 141 shares, increasing direct ownership by 0.93% to 15,336 unitsForm 4Grant or award
- May 6, 2024ECLSEC Form 4 filed by Larson MichaelForm 4Grant or award
- Apr 15, 2024RSGSEC Form 4 filed by Larson MichaelForm 4Grant or award
- Mar 31, 2024ECLLarson Michael was granted 146 shares, increasing direct ownership by 0.97% to 15,170 unitsForm 4Grant or award
- Mar 14, 2024ECLLarson Michael exercised 2,400 shares at a strike of $104.85 and covered exercise/tax liability with 1,119 shares, increasing direct ownership by 9% to 14,998 unitsForm 4Shares withheld for taxes or exercise priceExercise or conversion of a derivative
- Jan 31, 2024RSGLarson Michael converted options into 2,579 shares, increasing direct ownership by 5% to 54,794 unitsForm 4Exercise or conversion of a derivative
- Jan 16, 2024RSGSEC Form 4 filed by Larson MichaelForm 4Grant or award
- Jan 2, 2024RSGSEC Form 4 filed by Larson MichaelForm 4Grant or award
- Dec 31, 2023ECLLarson Michael was granted 157 shares, increasing direct ownership by 1% to 13,717 unitsForm 4Grant or award
- Oct 13, 2023RSGSEC Form 4 filed by Larson MichaelForm 4Grant or award
- Sep 30, 2023ECLLarson Michael was granted 184 shares, increasing direct ownership by 1% to 13,532 unitsForm 4Grant or award
- Sep 27, 2023+$41.5KWIWLarson Michael bought $41,500 worth of shares (5,000 units at $8.30), increasing direct ownership by 52% to 14,547 unitsForm 4/AOpen-market purchase
- Sep 27, 2023+$103KWIALarson Michael bought $102,700 worth of shares (13,000 units at $7.90), increasing direct ownership by 157% to 21,268 unitsForm 4/AOpen-market purchase
- Jul 14, 2023RSGSEC Form 4 filed by Larson MichaelForm 4Grant or award
- Jun 30, 2023ECLSEC Form 4 filed by Larson MichaelForm 4Grant or award
- May 4, 2023ECLSEC Form 4 filed by Larson MichaelForm 4Grant or award
- Apr 14, 2023RSGSEC Form 4 filed by Larson MichaelForm 4Grant or award
- Apr 5, 2023ECLSEC Form 4 filed by Larson MichaelForm 4Shares withheld for taxes or exercise priceExercise or conversion of a derivative
- Mar 31, 2023ECLSEC Form 4 filed by Larson MichaelForm 4Grant or award
- Jan 31, 2023RSGSEC Form 4: Larson Michael converted options into 2,702 shares, increasing direct ownership by 5% to 52,215 unitsForm 4Exercise or conversion of a derivative
- Jan 13, 2023RSGSEC Form 4 filed by Larson MichaelForm 4Grant or award
- Jan 3, 2023RSGSEC Form 4 filed by Larson MichaelForm 4Grant or award
- Dec 31, 2022ECLSEC Form 4: Larson Michael was granted 215 shares, increasing direct ownership by 2% to 11,342 unitsForm 4Grant or award
- Oct 14, 2022RSGSEC Form 4 filed by Larson MichaelForm 4Grant or award
- Sep 30, 2022ECLSEC Form 4: Larson Michael was granted 214 shares, increasing direct ownership by 2% to 11,099 unitsForm 4Grant or award
- Jul 15, 2022+$48.9KWIASEC Form 4: Larson Michael bought $48,900 worth of shares (5,000 units at $9.78), increasing direct ownership by 153% to 8,268 unitsForm 4Open-market purchase
- Jul 15, 2022+$50.8KWIWSEC Form 4: Larson Michael bought $50,782 worth of shares (5,000 units at $10.16), increasing direct ownership by 110% to 9,547 unitsForm 4Open-market purchase
- Jul 15, 2022RSGSEC Form 4 filed by Larson MichaelForm 4Grant or award
- Jun 30, 2022ECLSEC Form 4: Larson Michael was granted 205 shares, increasing direct ownership by 2% to 10,860 unitsForm 4Grant or award
- May 5, 2022ECLSEC Form 4 filed by Larson MichaelForm 4Grant or award
- Apr 20, 2022ECLSEC Form 4: Larson Michael exercised 4,500 shares at a strike of $63.99 and covered exercise/tax liability with 1,578 shares, increasing direct ownership by 38% to 10,633 unitsForm 4Shares withheld for taxes or exercise priceExercise or conversion of a derivative
- Apr 14, 2022RSGSEC Form 4 filed by Larson MichaelForm 4Grant or award
- Mar 31, 2022ECLSEC Form 4: Larson Michael was granted 175 shares, increasing direct ownership by 2% to 7,711 unitsForm 4Grant or award
- Jan 31, 2022RSGSEC Form 4: Larson Michael converted options into 3,403 shares, increasing direct ownership by 7% to 49,513 unitsForm 4Exercise or conversion of a derivative
- Jan 14, 2022RSGSEC Form 4 filed by Larson MichaelForm 4Grant or award
- Jan 3, 2022RSGSEC Form 4 filed by Larson MichaelForm 4Grant or award
- Dec 31, 2021ECLSEC Form 4: Larson Michael was granted 123 shares, increasing direct ownership by 2% to 7,518 unitsForm 4Grant or award
- Oct 15, 2021RSGSEC Form 4 filed by Larson MichaelForm 4Grant or award
- Sep 30, 2021ECLSEC Form 4: Larson Michael was granted 136 shares, increasing direct ownership by 2% to 7,380 unitsForm 4Grant or award
- Jul 15, 2021RSGSEC Form 4 filed by LARSON MICHAELForm 4Grant or award
- Jun 30, 2021ECLSEC Form 4: LARSON MICHAEL was granted 140 units of Common Stock, increasing direct ownership by 2% to 7,228 unitsForm 4Grant or award
- May 6, 2021ECLSEC Form 4 filed by LARSON MICHAELForm 4Grant or award
- Apr 15, 2021RSGSEC Form 4 filed by LARSON MICHAELForm 4Grant or award
- Mar 31, 2021ECLSEC Form 4: Michael Larson was granted 134 units of Common Stock, increasing direct ownership by 2% to 7,073 unitsForm 4Grant or award
- Jan 31, 2021RSGSEC Form 4: Michael Larson exercised 3,680 units of Common Stock at a strike of $0.00, increasing ownership by 9% to 46,110 unitsForm 4Exercise or conversion of a derivative
- Jan 15, 2021RSGSEC Form 4 filed by Michael LarsonForm 4Grant or award
Also sits on boards with
Officers and directors who share two or more companies with Michael Larson.
Compare Michael Larson with
- Michael Larson vs Ian M. Craig2 shared
- Michael Larson vs Kim Stout2 shared
- Michael Larson vs Jeffrey Masom2 shared
- Michael Larson vs Thomas Gahan2 shared
- Michael Larson vs Michael Carlton Buchanan2 shared
- Michael Larson vs Courtney A. Hoffmann2 shared
Other insiders at the same companies
- Brian A BalesRSG
- Bryce L MewhorterECL
- Benjamin M. ClarkECL
- Darrell R BrownECL
- Jandeen M BooneECL
- John J ZillmerECL
- Julie WhalenECL
- Suzanne M VautrinotECL
- Lionel L Nowell IIIECL
- Tracy B McKibbenECL
- David MacLennanECL
- Marion K. GrossECL
- Eric Mark GreenECL
- Michel D DoukerisECL
- Shari L BallardECL
- Judson AlthoffECL
Questions about Michael Larson
- What is Michael Larson's role at Ecolab Inc.?
- Michael Larson reports to the SEC as director at Ecolab Inc. (ECL), according to the latest filing on October 2, 2026. Michael Larson has also filed as director at Republic Services, Inc. (RSG), director at Mexican Economic Development Inc (FMX), director at Western Asset Inflation-Linked Opportunities & Income Fund (WIW) and director at Western Asset Inflation-Linked Income Fund (WIA).
- How many shares does Michael Larson own?
- After the latest filing that states it, Michael Larson directly owned 19,326 shares of Ecolab Inc. (ECL), 58,427 shares of Republic Services, Inc. (RSG), 14,547 shares of Western Asset Inflation-Linked Opportunities & Income Fund (WIW) and 21,268 shares of Western Asset Inflation-Linked Income Fund (WIA). Shares held through trusts, funds or family members are reported separately and are not counted here.
- Has Michael Larson bought or sold stock recently?
- The most recent open-market purchase was on September 27, 2023: bought 5,000 shares of Western Asset Inflation-Linked Opportunities & Income Fund (WIW) for $41.5K at an average of $8.30.
- How do I get alerts when Michael Larson files?
- Follow Michael Larson on Quantisnow and you get an email, and a phone notification on Plus, within minutes of each new Form 4 or Form 5, and of each Form 144 notice of a planned sale. Michael Larson filed 1 time in the last 90 days.
From SEC Forms 3, 4, 5 and 144 filed by Michael Larson (SEC CIK 0001098825). Totals count each trade once, skipping amendments whose original is on file, from Jan 20, 2021 on. View on SEC EDGAR