No insider purchase over the last 90 days. The latest, by SMBC Nikko Securities Inc., was filed 04 Jul 2024.
Sumiseki Holdings, Inc.: what insiders have been doing
Sumiseki Holdings, Inc., classified in the Energy sector, is a listed company based in Japan, founded in 2008. Its insiders report their share dealings to EDINET (Japan FSA). The last twelve months, up to 26 October 2026, brought 1 filing signed by 1 insider.
No open-market purchase or sale appears among the filings, only grants, plan transactions and other operations. Compensation-driven entries like these are tracked, but they say little about how insiders judge the share price.
With 1 filing in twelve months, the company is quieter than the median of 3 filings across the 3,205 companies we follow on the same exchange. Over the whole record (from 2021), the tally stands at 89 purchases and 62 sales.
No insider has bought Sumiseki Holdings, Inc. shares on the open market in the past twelve months.
Source: insider filings from EDINET (Japan FSA). Past trades are no guide to future returns.
Key facts
Headquarters: Japan · Founded: 2008
Source: Wikidata (CC0).
Since the insiders bought
- -54.8%Entry JP¥1,328 · Close at T+365 JP¥600
- -45.0%Entry JP¥1,195 · Close at T+365 JP¥657
Entry is the close on the day after publication, the first price a reader could act on. Prices in the listing currency. Past moves are not a forecast.
This score ranks the purchase within its own market. A position size is suggested only on the venues of the backtested strategy universe; elsewhere, signals stay on watch. Not investment advice.
Transparent value + quality ranking, distinct from the insider signal.
Financial data
as of FY 2026FY ended March 2026 · cache
- 11.3% of flowShareXTKSEDINET:S100YVIJ
- 0.4% of flowShareXTKSEDINET:S100VWV4
- 10.4% of flowShareXTKSEDINET:S100UTQJ
- 12.6% of flowShareXTKSEDINET:S100U8BH
- 36.3% of flowShareXTKSEDINET:S100U32Z
- 50.7% of flowShareXTKSEDINET:S100TZL8
- 300 sharesShareXTKSEDINET:S100TZL8:T15Canonical exit: 7 Aug 2024 (T+90)
- 100 shares@ JP¥2,353.99180.0% of flowShareXOFFEDINET:S100TZL8:T26Canonical exit: 18 Aug 2024 (T+90)
- 200 sharesShareXTKSEDINET:S100TZL8:T53Canonical exit: 29 Aug 2024 (T+90)
- 300 sharesShareXTKSEDINET:S100TZL8:T62Canonical exit: 3 Sept 2024 (T+90)
- 600 shares@ JP¥1,345.00110.0% of flowShareXOFFEDINET:S100TZL8:T85Canonical exit: 22 Sept 2024 (T+90)
- 100 sharesShareXTKSEDINET:S100TZL8:T91Canonical exit: 23 Sept 2024 (T+90)
- 300 sharesShareXTKSEDINET:S100TZL8:T3Canonical exit: 29 Jul 2024 (T+90)
- 100 sharesShareXTKSEDINET:S100TZL8:T5Canonical exit: 30 Jul 2024 (T+90)
- 700 sharesShareXTKSEDINET:S100TZL8:T9Canonical exit: 5 Aug 2024 (T+90)
- 100 sharesShareXTKSEDINET:S100TZL8:T11
- 400 sharesShareXTKSEDINET:S100TZL8:T14
- 100 sharesShareXTKSEDINET:S100TZL8:T19Canonical exit: 12 Aug 2024 (T+90)
- 100 sharesShareXTKSEDINET:S100TZL8:T21Canonical exit: 13 Aug 2024 (T+90)
- 600 sharesShareXTKSEDINET:S100TZL8:T23Canonical exit: 14 Aug 2024 (T+90)
- 400 sharesShareXTKSEDINET:S100TZL8:T25Canonical exit: 15 Aug 2024 (T+90)
- 300 sharesShareXTKSEDINET:S100TZL8:T24
- 400 sharesShareXTKSEDINET:S100TZL8:T27
- 300 sharesShareXTKSEDINET:S100TZL8:T32Canonical exit: 19 Aug 2024 (T+90)
- 1,700 sharesShareXTKSEDINET:S100TZL8:T31
25 of 204 declarations
About Sumiseki Holdings, Inc.
住石ホールディングス株式会社 is a Japanese company operating in the energy sector. It is listed on the Tokyo Stock Exchange under the symbol XTKS.
