6-K ·Filed May 15, 2026

UMC

UNITED MICROELECTRONICS CORP
NEUTRAL
Impact 2/10
Horizonimmediate Processed4mo ago SEC0001193125-26-225017
Notable filing: 6-K
Actionable Insight • Neutral

Routine buyback disclosure with no material impact. The repurchase program continues at a modest pace. Monitor next quarterly filing for any change in buyback authorization or pace.

DirectionNeutral
Confidencehigh
Horizonimmediate
Final — all horizons settled through T+60d
UMC ▲ +10.12% at T+60d
NEUTRAL call ✓ call won +10.12% · α vs SPY +5.60% · entry $17.20 → $18.94
Entry anchored
May 15, 2026
via day open
T+1d
-0.47%
call -0.47% · α -0.40%
$17.12
settled 5mo ago
T+5d
+5.93%
call +5.93% · α +4.97%
$18.22
settled 4mo ago
T+20d
+34.19%
call +34.19% · α +32.07%
$23.08
settled 4mo ago
T+60d
+10.12%
call +10.12% · α +5.60%
$18.94
settled 7w ago

Price Chart

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Executive Summary

UMC disclosed that cumulative share repurchases exceeded NTD$300 million in value as of May 15, 2026. The company repurchased 3,780,000 common shares for NTD$406,598,693 at an average price of NTD$107.57 per share, bringing total treasury shares to 20,531,000, or 0.16% of issued shares. This is a routine buyback disclosure with no material financial impact.

Key Facts

  • Cumulative share repurchases exceeded NTD$300 million threshold on May 15, 2026
  • 3,780,000 common shares repurchased for NTD$406,598,693 at average NTD$107.57/share
  • Cumulative treasury shares held: 20,531,000, representing 0.16% of total issued shares

Financial Impact

NTD$406.6 million (approx. $12.5M USD) in share repurchases, representing 0.16% of outstanding shares — immaterial relative to $43.1B market cap

shares outstandingtreasury stock

Risk Factors

  • No material risks identified from this filing

Market Snapshot

Exchange
NYSE
Sector
Semiconductors & Related Devices
Analyst Consensus
31% bullish (32 analysts)

Investment Themes

Semiconductors

Documents Analyzed

This report is based on 5 SEC documents filed with EDGAR.

DocumentAccession Number
6-K Filing (Primary)0001193125-26-225017
Document: umc-ex99_1.htm0001193125-26-225017
Document: 0001193125-26-225017-index-headers.html0001193125-26-225017
Document: 0001193125-26-225017-index.html0001193125-26-225017
Document: 0001193125-26-225017.txt0001193125-26-225017
25 reports for UMC
Performance horizon
60% Hit rate 3 of 5 directional calls best @ T+1▲ +6.91%Jun 23, 2026
Filters
Rows
Reports for UMC — sortable, filterable
TypeNow
Sep 4, 2026
28d ago
6-K
BULLISH ★ 5/10
$20.77 $21.90▲ +5.44%▲ +6.65%$26.27 (+26.48%)
Sep 2, 2026
4w ago
6-K
NEUTRAL ★ 2/10
$19.97 $22.12▲ +10.77%▲ +11.72%$26.27 (+31.55%)
Aug 26, 2026
5w ago
6-K
BEARISH ★ 5/10
$19.03 $19.97▼ −4.94%▼ −5.06%$26.27 (−38.05%)
Aug 14, 2026
7w ago
6-K
BEARISH ★ 5/10
$19.15 $18.34▲ +4.23%▲ +2.86%$26.27 (−37.18%)
Aug 5, 2026
8w ago
6-K
NEUTRAL ★ 2/10
$19.29 $19.31▲ +0.10%▼ −0.25%$26.27 (+36.18%)
Jul 21, 2026
10w ago
6-K
NEUTRAL ★ 2/10
$21.19 $19.08▼ −9.96%▼ −8.73%$26.27 (+23.97%)
Jul 15, 2026
11w ago
6-K
NEUTRAL ★ 2/10
$24.92 $21.29▼ −14.57%▼ −13.59%$26.27 (+5.42%)
Jul 14, 2026
11w ago
6-K
NEUTRAL ★ 3/10
$23.84 $20.30▼ −14.85%▼ −13.55%$26.27 (+10.19%)
Jul 6, 2026
12w ago
6-K
BULLISH ★ 5/10
$25.83 $24.34▼ −5.77%▼ −6.26%$26.27 (+1.70%)
Jun 29, 2026
13w ago
6-K
NEUTRAL ★ 3/10
$26.84 $25.83▼ −3.76%▼ −5.15%$26.27 (−2.12%)
Showing 10 of 25

US Market Status

Market Closed — Opens Mon (39h 27m)

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