Japan Insider Activity (EDINET) — 2026-05-20

by japan-insider-activities-daily

🇯🇵 EDINET DB Report — 2026-05-20

🟢 ACCUMULATING — 6239 Nagaoka ← Fractal Business, 6.38% (increased by 0.29pp from prior filing) Read: Fractal Business added marginally to its Nagaoka stake and flagged potential constructive dialogue, but no activist action is declared.

🔁 BUYBACK — 5016 JX Metals Read: JX Metals launched a self-tender offer (公開買付け) to repurchase its own shares — a strong management-confidence signal.

🔁 BUYBACK — 4063 Shin-Etsu Chemical Read: Shin-Etsu Chemical launched a self-tender offer (公開買付け) to repurchase its own shares — a strong management-confidence signal.

🔁 BUYBACK — 6335 Tokyo Kikai Seisakusho Read: Tokyo Kikai Seisakusho issued a new buyback authorization — a management-confidence signal.

🔁 BUYBACK — 4287 Just Planning Read: Just Planning issued a new buyback authorization — a management-confidence signal.

🔁 BUYBACK — 8725 MS&AD Insurance Group Holdings Read: MS&AD Insurance Group Holdings issued a new buyback authorization — a management-confidence signal.

🔁 BUYBACK — 8630 SOMPO Holdings Read: SOMPO Holdings issued a new buyback authorization — a management-confidence signal.

🔁 BUYBACK — 8766 Tokio Marine Holdings Read: Tokio Marine Holdings issued a new buyback authorization — a management-confidence signal.

🔁 BUYBACK — 7814 Nihon Sohatsu Group Read: Nihon Sohatsu Group issued a new buyback authorization and simultaneously announced a ToSTNeT-3 off-auction purchase — a management-confidence signal.

🔁 BUYBACK — 1822 Daito Construction Read: Daito Construction issued a new buyback authorization and simultaneously announced a ToSTNeT-3 off-auction purchase — a management-confidence signal.

🔁 BUYBACK — 7751 Canon Read: Canon executed a ToSTNeT-3 off-auction buyback — a management-confidence signal.

🔁 BUYBACK — 7610 T2 Read: T2 completed a ToSTNeT-3 off-auction buyback and confirmed the program is now closed.

🔁 BUYBACK — 4063 Shin-Etsu Chemical Read: Shin-Etsu Chemical completed post-adjustment settlement on its Accelerated Share Repurchase (ASR) program, closing out the transaction.

🔁 BUYBACK — 366A Wellness Communications Read: Wellness Communications amended its articles of incorporation to formally enable share repurchases — a pre-authorization governance step before any actual buyback.

🔁 BUYBACK — 4260 Hybrid Technologies Read: Hybrid Technologies disclosed its monthly buyback progress report and confirmed the program is now complete.

🔁 BUYBACK — 1966 Takata Kogyosho Read: Takata Kogyosho disclosed its monthly buyback progress report and confirmed the program is now complete.

🔁 BUYBACK — 9932 Sugimoto Shoji Read: Sugimoto Shoji cancelled treasury shares, permanently reducing the outstanding share count — a capital efficiency action.

🔁 BUYBACK — 7940 Wavelock Holdings Read: Wavelock Holdings cancelled treasury shares, permanently reducing the outstanding share count — a capital efficiency action.

🎯 TOB — 4171 Global Information ← Uzabase, Inc. (launch) Read: Uzabase launched a tender offer for Global Information at ¥1,680/share (35.81% premium), offer period 2026-05-21–2026-07-01; target board expressed support and recommends shareholders tender. Source: https://www.nikkei.com/nkd/disclosure/tdnr/20260520542553/

📈 GUIDANCE UP — 8887 Seila Holdings Read: Seila Holdings raised its full-year earnings forecast and increased its year-end dividend (増配), signaling better-than-expected results.

📊 GUIDANCE REVISED — 6875 MegaChips Read: MegaChips revised its earnings forecast following a sale of investment securities; direction unclear — see filing.

🔴 DISTRIBUTING — 3083 Starcise ← Masaya Takakuwa, 0.46% (decreased by 12.43pp from prior filing) Read: Masaya Takakuwa offloaded nearly his entire Starcise position, shedding 12.43pp to arrive at a residual 0.46%.

🔵 MAINTENANCE • 8783 abc ← Seacastle Singapore Pte. Ltd 32.63% Read: Seacastle Singapore amended its filing to reflect ratio movement from simultaneous warrant exercises and share sales, with no net directional signal.