Obayashi Corporation Stock: price and insider trades · Japan

Obayashi Corporation, founded in 1892, is a Banks company based in Shinagawa Intercity, Japan. Its directors and officers file their transactions with EDINET (Japan FSA). Between 29 October 2025 and 29 October 2026, 14 insiders published 734 filings.

Open-market activity splits into 508 purchases totalling €191.2M and 222 sales totalling €46.1M; 13 insiders sit on the buying side and 13 insiders on the selling side. No amount is published for 416 filings, which the totals therefore leave out. Open-market purchases are the filings investors watch most closely, because the insider pays for the shares out of pocket. ブラックロック・ファンド・アドバイザーズ(BlackRock Fund Advisors) filed the largest purchase, €43.2M, on 28 October 2026, which represents 0.36% of the company's market value. The buyers include 13 major shareholders.

In the case of 211 purchases, another manager of the company was buying within the same 30 days. When several insiders buy within a few weeks of each other, analysts speak of a cluster purchase. The most recent open-market purchase was published on 28 October 2026, 12 days ago. Filings reach the EDINET (Japan FSA) feed a median of 40 days after the trade. Until a filing is published, the market cannot know about the trade.

Across the 3,212 companies tracked on its exchange, the median is 3 filings; at 734 filings, this issuer sits above that mark. Over the whole record (from 2021), the tally stands at 508 purchases and 222 sales.

For comparison within the same sector, see the insider buying recorded at BAWAG Group AG and ASR Nederland N.V. Every figure here comes from the filings published by EDINET (Japan FSA) and describes the past, not future prices; it is not investment advice.