Who
Reid Tarlton Campbell
Director
Company insider
Files Form 4 as: President, White Mountains Insurance Group.
In numbers
- Trades disclosed
- 75
- Buys
- 0
- Sells
- 10
- Bought
- $0
- Sold
- $14.7M
- Companies
- 1
- Companies where not an officer
- 0
- First trade
- 27 Dec 2007
- Last trade
- 21 May 2026
- Last filed
- 22 May 2026
Companies traded
Activity over time
1 Nov 2024 – 1 Oct 2026
Buys above the line, sells below, each month.
Every trade
| Traded | Company | What | Amount | |
|---|---|---|---|---|
| 21 May 2026filed 22 May 2026 | WTM White Mountains Insurance GroupInsurance | SEC FORM 4 Code A | —135 at $0.00 | filing |
| 21 May 2026filed 22 May 2026 | WTM White Mountains Insurance GroupInsurance | SEC FORM 4 Code A | —135 at $0.00 | filing |
| 19 Dec 2025filed 22 Dec 2025 | WTM White Mountains Insurance GroupInsurance | SEC FORM 4 Sold | —5,000 at $0.00 | filing |
| 19 Dec 2025filed 22 Dec 2025 | WTM White Mountains Insurance GroupInsurance | SEC FORM 4 Sold | $10.3M5,000 at $2,050.00 | filing |
| 25 Nov 2025filed 26 Nov 2025 | WTM White Mountains Insurance GroupInsurance | SEC FORM 4 Code G | —50 at $0.00 | filing |
| 22 May 2025filed 23 May 2025 | WTM White Mountains Insurance GroupInsurance | SEC FORM 4 Code A | —150 at $0.00 | filing |
| 23 May 2024filed 24 May 2024 | WTM White Mountains Insurance GroupInsurance | SEC FORM 4 Code A | —165 at $0.00 | filing |
| 21 Mar 2024filed 21 Mar 2024 | WTM White Mountains Insurance GroupInsurance | SEC FORM 4 Code G | —55 at $0.00 | filing |
| 22 Feb 2024filed 23 Feb 2024 | WTM White Mountains Insurance GroupInsurance | SEC FORM 4 Code A | —45 at $0.00 | filing |
| 1 Jan 2024filed 2 Jan 2024 | WTM White Mountains Insurance GroupInsurance | SEC FORM 4 Code F | $1.1M710 at $1,505.01 | filing |
| 1 Jan 2023filed 3 Jan 2023 | WTM White Mountains Insurance GroupInsurance | SEC FORM 4 Code F | $1.0M710 at $1,414.33 | filing |
| 1 Jun 2022filed 2 Jun 2022 | WTM White Mountains Insurance GroupInsurance | SEC FORM 4 Code G | —100 at $0.00 | filing |
| 1 Jan 2022filed 4 Jan 2022 | WTM White Mountains Insurance GroupInsurance | SEC FORM 4 Code F | $811K800 at $1,013.90 | filing |
| 25 Feb 2021filed 26 Feb 2021 | WTM White Mountains Insurance GroupInsurance | SEC FORM 4 Code A | —1,800 at $0.00 | filing |
| 1 Jan 2021filed 4 Jan 2021 | WTM White Mountains Insurance GroupInsurance | SEC FORM 4 Code F | $931K930 at $1,000.66 | filing |
| 8 Dec 2020filed 10 Dec 2020 | WTM White Mountains Insurance GroupInsurance | SEC FORM 4 Code G | —30 at $0.00 | filing |
| 27 Feb 2020filed 2 Mar 2020 | WTM White Mountains Insurance GroupInsurance | SEC FORM 4 Code A | —1,800 at $0.00 | filing |
| 1 Jan 2020filed 2 Jan 2020 | WTM White Mountains Insurance GroupInsurance | SEC FORM 4 Code F | $1.2M1,045 at $1,115.51 | filing |
| 25 Sep 2019filed 26 Sep 2019 | WTM White Mountains Insurance GroupInsurance | SEC FORM 4 Code G | —90 at $0.00 | filing |
| 28 Feb 2019filed 4 Mar 2019 | WTM White Mountains Insurance GroupInsurance | SEC FORM 4 Code A | —2,000 at $0.00 | filing |
News
How Efficiency and AI Support White Mountains Insurance Group, Ltd.'s (WTM) Revaluation ThesisWTM · insidermonkey.com · 16 Oct 2026
0 headlines in the last 90 days name Reid Tarlton Campbell; 1 article from the last 14 days about the 1 company they traded most, at most three about any one of them.