Institutional Manager · CIK 0001132716
OCONNOR, A Distinct Business Unit of UBS ASSET MANAGEMENT AMERICAS (LLC)
CHICAGO, IL · File #028-06327
Latest AUM
$857.8M
Positions
221
Top-10 Concentration
100.0%
Filings
20
Portfolio Value Over Time
2024-03
2024-06
2024-09
2024-12
2025-03
2025-06
2025-09
2025-12
Biggest QoQ Changes
Ranked by conviction flow (share change × current price) so mark-to-market moves don't dominate. Price effect column shows how much of the $ change was just the stock moving.
| Action | Issuer | Ticker / CUSIP | Δ Shares | Flow ($) | Price Effect |
|---|---|---|---|---|---|
| EXITED | VERONA PHA | 925050106 | -1,106,260 | -$118.0M | $0 |
| NEW | EXACT SCIE | 30063PAB1 | +90,000,000 | +$93.7M | $0 |
| NEW | CIDARA THE | 171757206 | +315,474 | +$69.7M | $0 |
| EXITED | MR COOPER | 62482R107 | -206,231 | -$43.5M | $0 |
| NEW | SYNOVUS FI | 87161C501 | +699,181 | +$35.0M | $0 |
| EXITED | SNOWFLAKE | 833445AB5 | -20,000,000 | -$30.4M | $0 |
| EXITED | SPIRIT AER | 848574109 | -709,795 | -$27.4M | $0 |
| ADD | BROADCOM I | AVGO | +73,171 | +$25.3M | +$92,688 |
| EXITED | HALOZYME T | 40637HAD1 | -18,000,000 | -$20.7M | $0 |
| EXITED | SOUTHERN C | 842587107 | -201,920 | -$19.1M | $0 |
Sector Allocation
Filing History
- 13F HOLDINGS REPORT (Amended)Q/E Dec 20251 pos · $12.0M
- 13F HOLDINGS REPORT (Amended)Q/E Dec 20251 pos · $143.5M
- 13F HOLDINGS REPORT (Amended)Q/E Dec 20255 pos · $616.1M
- 13F HOLDINGS REPORTQ/E Dec 2025221 pos · $857.8M
- 13F HOLDINGS REPORT (Amended)Q/E Dec 20254 pos · $633.7M
- 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 20257 pos · $790.7M
- 13F HOLDINGS REPORTQ/E Sep 2025176 pos · $927.5M
- 13F HOLDINGS REPORT (Amended)Q/E Sep 20251 pos · $21.3M
- 13F HOLDINGS REPORT (Amended)Q/E Sep 20251 pos · $94.0M
- 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 REPORTQ/E Mar 2025304 pos · $1.23B
- 13F HOLDINGS REPORT (Amended)Q/E Mar 202512 pos · $1.20B
- 13F HOLDINGS REPORT (Amended)Q/E Mar 20255 pos · $705.1M
- 13F HOLDINGS REPORT (Amended)Q/E Mar 20257 pos · $798.8M
Top 1 Holdings — Dec 2025
| # | Issuer | Ticker | Shares | Value | % of Portfolio |
|---|---|---|---|---|---|
| 1 | CROSS CTRY | 227483104 | 804,764 | $12.0M | 100.00% |