InsidersTradesSigma
Total declarations
Companies
▲ Purchases (5 ops.)
▼ Sales (0 ops.)
Insider track record
ExecutiveDisclosed buys
5
Disclosed sells
0
T+90 hit rate
20%
T+90 mean return
-10.7%
Across 5 buy signals with a settled T+90 return. Return basis: close on the day after publication.
Signal history
Discover the complete record of transactions filed by Baruffi Kumi Yamamoto, Directeur Juridique. Officer active across 2 companies, notably Columbia Banking System, INC.. In total, 26 filings have been logged. Breakdown: 5 buys · 0 sell. Total volume traded: €44k. History available since 6 July 2021. The latest transaction was disclosed on 13 March 2026 (Retenue fiscale). Regulator: SEC (Form 4). The full history is openly available.
Companies and markets linked to Baruffi Kumi Yamamoto
Open company profiles for insider transactions, fundamentals and analyst consensus when available.
Declarations26 total
937 shares@ US$26.230.0003% mcap11.7% of flowCommon StockSEC:0000887343-26-000107:0
2,381 shares@ US$26.239.4% of flowCommon StockSEC:0001619728-26-000003:0
1,799 shares@ US$28.455.6% of flowCommon StockSEC:0000887343-26-000092:0
1,036 shares@ US$31.493.5% of flowCommon StockSEC:0000887343-26-000049:0
5,093 shares@ US$29.6916.4% of flowCommon StockSEC:0000887343-26-000028:0
632 shares0Common StockSEC:0000887343-26-000017:0
1,799 shares@ US$26.738.0% of flowCommon StockSEC:0000887343-25-000092:0
1,012 shares@ US$27.414.6% of flowCommon StockSEC:0000887343-25-000026:0
689 shares@ US$27.013.1% of flowCommon StockSEC:0000887343-25-000002:0
13,710 shares@ US$17.8739.2% of flowCommon StockSEC:0000887343-24-000130:0
673 shares@ US$19.012.1% of flowCommon StockSEC:0000887343-24-000060:0
461 shares@ US$26.681.9% of flowCommon StockSEC:0000887343-24-000002:0
854 shares@ US$18.252.5% of flowCommon StockSEC:0000887343-23-000286:0
Canonical exit: 28 Sept 2023 (T+90)
507 shares@ US$20.811.7% of flowCommon StockSEC:0000887343-23-000202:0
1,020 shares0CommonSEC:0000887343-23-000094:0
1,456 shares0CommonSEC:0000887343-23-000068:0
859 shares@ US$32.054.4% of flowCommonSEC:0000887343-23-000022:0
232 shares@ US$26.841.0% of flowCommonSEC:0000887343-23-000005:0
Canonical exit: 30 Mar 2023 (T+90)
446 shares@ US$25.790.0001% mcap6.0% of flowCommonSEC:0000887343-22-000116:0
Canonical exit: 28 Sept 2022 (T+90)
188 shares@ US$34.070.0001% mcap3.2% of flowCommonSEC:0000887343-22-000080:0
1,592 shares@ US$32.720.0006% mcap26.3% of flowCommonSEC:0000887343-22-000067:0
289 shares@ US$36.630.0001% mcap5.2% of flowCommonSEC:0000887343-22-000050:0
600 shares@ US$36.750.0002% mcap10.7% of flowCommonSEC:0000887343-22-000021:0
186 shares@ US$29.450.0001% mcap2.7% of flowCommonSEC:0000887343-22-000003:0
Canonical exit: 4 Apr 2022 (T+90)
304 shares@ US$31.641.0% of flowCommonSEC:0000887343-21-000141:0
Canonical exit: 4 Oct 2021 (T+90)
25 of 26 declarations
About Baruffi Kumi Yamamoto
BARUFFI KUMI YAMAMOTO is Directeur Juridique. She has 26 filings in total, and across the 26 sampled filings, buy amounts are 44141 EUR and sell amounts are 0 EUR, with Attribution shown as the modal transaction nature, over the period from 2016-01-14 to 2026-03-20. The sampled recent filings concern Columbia Banking System, INC. and COLUMBIA BANKING SYSTEM INC, with reported amounts including 226745.3718095127 EUR on 2024-03-04, 127613.1628557835 EUR on 2026-02-04, and 54205.38117421965 EUR on 2026-03-17.
