United Microelectronics Corporation 13F holders
Of the 44 funds followed here, 4 reported a position in United Microelectronics Corporation in a 13F for the quarter ended 30 June 2026. The largest: Two Sigma Investments, 3.1 million shares worth $84.0 million, 0.1% of its reported book. Sold out: Bridgewater Associates.
| Fund | Shares | Value | Of its book | Change on the quarter | Status | Quarter ended | Filing |
|---|---|---|---|---|---|---|---|
| Two Sigma Investments | 3,088,852 | $84.0 million | 0.1% | -6,566,550 | trimmed | 30 June 2026 | 13F |
| Citadel Advisors | 1,500,758 | $40.8 million | 0.0% | +441,436 | added | 30 June 2026 | 13F |
| Millennium Management | 625,976 | $17.0 million | 0.0% | -1,228,053 | trimmed | 30 June 2026 | 13F |
| FMR LLC | 136,613 | $3.7 million | 0.0% | +16,465 | added | 30 June 2026 | 13F |
| Bridgewater Associates | 0 | $0 | 0.0% | -134,029 | exited | 30 June 2026 | 13F |
Value is what the fund reported. Change is shares against the fund's previous 13F; a fund with one filing read shows no change. 13Fs cover long US positions of managers above $100 million and are filed up to 45 days after the quarter.
Schedule 13D and 13G filed on the name, last twelve months
| Filed | Schedule | Who | Holding | Of the class | Event date | Rule or purpose | Filing |
|---|---|---|---|---|---|---|---|
| 29 April 2026 | 13G/A | BlackRock, Inc. and 1 other | 817.5 million | 6.5% | 31 March 2026 | passive, institutional (13d-1(b)) | EDGAR |
A Schedule 13D is filed by anyone who crosses 5% of a class with intent to influence; a 13G by a passive holder. Amendments (/A) report a change, including an exit to zero. Holding and percentage are as the filer stated them on the cover page; the purpose is the filer's own words, cut short.
Fails to deliver
| Settlement date | Shares failed | Price | File |
|---|---|---|---|
| 31 August 2026 | 97,168 | $19.79 | SEC |
| 28 August 2026 | 40,777 | $19.07 | SEC |
| 26 August 2026 | 1,130 | $19.60 | SEC |
| 25 August 2026 | 1,345 | $19.05 | SEC |
| 24 August 2026 | 404 | $18.34 | SEC |
| 21 August 2026 | 267,340 | $18.00 | SEC |
| 18 August 2026 | 287 | $19.53 | SEC |
| 10 August 2026 | 55,000 | $18.72 | SEC |
| 7 August 2026 | 71,052 | $19.20 | SEC |
| 6 August 2026 | 263,570 | $19.29 | SEC |
| 5 August 2026 | 13 | $20.63 | SEC |
| 4 August 2026 | 26,473 | $18.69 | SEC |
| 3 August 2026 | 77 | $19.03 | SEC |
| 31 July 2026 | 19,357 | $18.94 | SEC |
| 29 July 2026 | 14,220 | $17.36 | SEC |
| 27 July 2026 | 236 | $19.48 | SEC |
| 24 July 2026 | 118,117 | $20.87 | SEC |
| 23 July 2026 | 122,751 | $21.29 | SEC |
| 17 July 2026 | 910 | $22.29 | SEC |
| 16 July 2026 | 549 | $24.92 | SEC |
| 15 July 2026 | 399 | $23.84 | SEC |
Shares that failed to deliver at settlement, per day, from the SEC's half-month files, which arrive about two weeks after the period. Largest in the window: 267,340 on 21 August 2026. A fail is an operational fact about settlement, not a position.
Source
Each fund's 13F-HR on EDGAR, linked per row; positions matched to UMC by CUSIP from the SEC's own fails-to-deliver files; Schedule 13D and 13G from the company's own filing index, each read to confirm the company is the issuer named.
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