Who
David Allen Tanner
Director
Company insider
Files Form 4 as: Director, White Mountains Insurance Group; Director, Northeast Bancorp /me/; Director, Protection One.
In numbers
- Trades disclosed
- 20
- Buys
- 2
- Sells
- 0
- Bought
- $676K
- Sold
- $0
- Companies
- 3
- Companies where not an officer
- 3
- First trade
- 23 Aug 2007
- Last trade
- 31 Aug 2026
- Last filed
- 31 Aug 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 | |
|---|---|---|---|---|
| 31 Aug 2026filed 31 Aug 2026 | WTM White Mountains Insurance GroupInsurance | SEC FORM 4 Code G | —2 at $0.00 | filing |
| 31 Aug 2026filed 31 Aug 2026 | WTM White Mountains Insurance GroupInsurance | SEC FORM 4 Code G | —2 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 |
| 21 May 2026filed 22 May 2026 | WTM White Mountains Insurance GroupInsurance | SEC FORM 4 Code A | —135 at $0.00 | filing |
| 4 Mar 2026filed 5 Mar 2026 | WTM White Mountains Insurance GroupInsurance | SEC FORM 4 Code G | —225 at $0.00 | filing |
| 4 Mar 2026filed 5 Mar 2026 | WTM White Mountains Insurance GroupInsurance | SEC FORM 4 Code G | —225 at $0.00 | filing |
| 10 Nov 2025filed 10 Nov 2025 | WTM White Mountains Insurance GroupInsurance | SEC FORM 4 Code G | —4 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 |
| 25 May 2023filed 26 May 2023 | WTM White Mountains Insurance GroupInsurance | SEC FORM 4 Code A | —180 at $0.00 | filing |
| 26 May 2022filed 27 May 2022 | WTM White Mountains Insurance GroupInsurance | SEC FORM 4 Code A | —225 at $0.00 | filing |
| 27 May 2021filed 28 May 2021 | WTM White Mountains Insurance GroupInsurance | SEC FORM 4 Code A | —225 at $0.00 | filing |
| 21 May 2020filed 22 May 2020 | WTM White Mountains Insurance GroupInsurance | SEC FORM 4 Code A | —225 at $0.00 | filing |
| 23 May 2019filed 28 May 2019 | WTM White Mountains Insurance GroupInsurance | SEC FORM 4 Code A | —250 at $0.00 | filing |
| 15 May 2019filed 16 May 2019 | Northeast Bancorp /me/ | SEC FORM 4 Code J | —10,000 | filing |
| 26 Mar 2019filed 27 Mar 2019 | WTM White Mountains Insurance GroupInsurance | SEC FORM 4 Bought | $4,5855 at $917.05 | filing |
| 26 Mar 2019filed 27 Mar 2019 | WTM White Mountains Insurance GroupInsurance | SEC FORM 4 Bought | $455K495 at $918.46 | filing |
| 23 Aug 2018filed 27 Aug 2018 | WTM White Mountains Insurance GroupInsurance | SEC FORM 4 Code A | —188 at $0.00 | filing |
| 12 Feb 2018filed 13 Feb 2018 | Northeast Bancorp /me/ | SEC FORM 4 Bought | $217K10,000 at $21.68 | filing |
| 23 Aug 2007filed 24 Sep 2007 | Protection One | SEC FORM 4 Code A | —8,114 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 David Allen Tanner; 1 article from the last 14 days about the 1 company they traded most, at most three about any one of them.