Institutional Manager · CIK 0001132716
UBS OCONNOR LLC
CHICAGO, IL · File #028-06327
Latest AUM
$857.8M
Positions
221
Top-10 Concentration
100.0%
Filings
20
Sector Allocation
Filing History
View all filings →- 13F HOLDINGS REPORT (Amended)Q/E Dec 20254 pos · $633.7M
- 13F HOLDINGS REPORTQ/E Dec 2025221 pos · $857.8M
- 13F HOLDINGS REPORT (Amended)Q/E Dec 20255 pos · $616.1M
- 13F HOLDINGS REPORT (Amended)Q/E Dec 20251 pos · $143.5M
- 13F HOLDINGS REPORT (Amended)Q/E Dec 20251 pos · $12.0M
- 13F HOLDINGS REPORT (Amended)Q/E Dec 2025263 pos · $1.66B
- 13F HOLDINGS REPORT (Amended)Q/E Sep 20254 pos · $698.5M
- 13F HOLDINGS REPORT (Amended)Q/E Sep 20251 pos · $94.0M
- 13F HOLDINGS REPORT (Amended)Q/E Sep 20251 pos · $21.3M
- 13F HOLDINGS REPORTQ/E Sep 2025176 pos · $927.5M
- 13F HOLDINGS REPORT (Amended)Q/E Sep 20257 pos · $790.7M
- 13F HOLDINGS REPORT (Amended)Q/E Jun 20252 pos · $567.9M
- 13F HOLDINGS REPORT (Amended)Q/E Jun 20258 pos · $1.32B
- 13F HOLDINGS REPORT (Amended)Q/E Jun 202512 pos · $2.10B
- 13F HOLDINGS REPORTQ/E Jun 2025354 pos · $1.95B
- 13F HOLDINGS REPORT (Amended)Q/E Jun 20254 pos · $1.01B
- 13F HOLDINGS REPORT (Amended)Q/E Mar 20255 pos · $929.9M
- 13F HOLDINGS REPORT (Amended)Q/E Mar 20257 pos · $798.8M
- 13F HOLDINGS REPORT (Amended)Q/E Mar 20255 pos · $705.1M
- 13F HOLDINGS REPORT (Amended)Q/E Mar 202512 pos · $1.20B
Top 4 Holdings — Dec 2025
| # | Issuer | Ticker | Shares | Value | % of Portfolio |
|---|---|---|---|---|---|
| 1 | KELLANOVA | BEKE | 4,913,257 | $390.8M | 61.66% |
| 2 | INFORMATIC | 45674M101 | 4,549,354 | $110.8M | 17.48% |
| 3 | SPIRIT AER | 848574109 | 2,823,309 | $107.7M | 17.00% |
| 4 | INTERPUBLI | INTR | 1,000,000 | $24.5M | 3.86% |