Sompo Holdings

8630.T · Japan

Sompo Holdings traded $164.4M (converted to USD) on 23 Oct 2026, 1.5× its 20-session average. Sector: Insurance & Underwriting.

504 trading days of history, to 2026-10-23 · all values converted to USD

Last close

$44.88

23 Oct

1-day change

+0.78%

vs previous close

Market cap

$39.8B

as of 23 Oct

Turnover

0.41%

of market cap traded

Dollar volume

$164.4M

as of 23 Oct

vs prior 20 sessions

1.5×

as of 23 Oct

Share of market volume

0.38%

as of 23 Oct

Volatility

32.7%

annualised

Infinity volume insights

since 27 March 2025

Every session our rules flagged for this company since 27 March 2025: 8. Those marked “In the feed” were published in the daily feed at the time; the rest are computed with the rules in use now. The feed shows a few a day across every market, so most never appear there. We began tracking this company on 28 September 2026; findings before then are marked “Before we tracked it”: it traded that way, and we were not yet watching.

2026-05-29Before we tracked it
Sompo Holdings traded $375.9M, 3.0× normal; 1.1% of its market cap changed hands
$375.9M against a 20-day average of $126.1M, on a rising price (+1.1%). Turnover 1.1% of market cap (2.9× its usual turnover, against a 20-day average of 0.39%).

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Volume by window

	Dollar volume	vs prior 20 sessions
Last session	$164M	1.5×
Week	For members · Sign in
Month

Sessions to 23 Oct.

Infinity sector: Insurance & UnderwritingBased on 110 companies, 89.5% of the Nikkei 225's trading.

Price and dollar volume

Bars coloured by direction

The last three months, one point a week (the week's last close and its total dollar volume).

How these are measured

Turnover: — dollar volume over market cap; how hard this name is traded relative to its size.
Vs prior 20 sessions: — above 1 means heavier trading than in the 20 sessions before it.
Share of market volume: — of the 110 names tracked in Japan, not the whole market.
Volatility: — from daily returns over the held history. Indicative, not a risk model.
Market cap: — the latest session's close × shares outstanding, in USD. Each day in the history has its own, from that day's close; the share count is refreshed monthly.

Prices and volume via the daily pipeline, converted to USD. USD values converted at ECB reference rates.

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