% of shares outstanding not shown: no SEC cover-page share count falls within 120 days of the 2026-Q1 quarter end, so any percentage would rest on a count that cannot speak for this quarter. Holder share counts are shown as filed.
Crowding percentile withheld — no market cap for OABIW in the served universe — the cohort is size-matched, and an unmatched percentile would compare a micro-cap register to a mega-cap one.
| # | Holder | Shares | Value | % of shares out | Δ QoQ |
|---|---|---|---|---|---|
| 1 | LMR Partners LLP | 897,392897,392 | $71,791 | — | — |
| 2 | ARISTEIA CAPITAL, L.L.C. | 679,919679,919 | $65,476 | — | — |
| 3 | Hudson Bay Capital Management LP | 465,229465,229 | $37,218 | — | — |
| 4 | Anson Funds Management LP | 23,66623,666 | $37,156 | — | ADD 100% |
| 5 | Sculptor Capital LP | 293,802293,802 | $28,293 | — | — |
| 6 | Calamos Advisors LLC | 200,000200,000 | $20,400 | — | — |
| 7 | MMCAP International Inc. SPC | 158,333158,333 | $12,667 | — | — |
| 8 | CSS LLC/IL | 54,65654,656 | $4,372 | — | — |
| 9 | WOLVERINE ASSET MANAGEMENT LLC | 27,32527,325 | $2,186 | — | — |
| 10 | Saba Capital Management, L.P. | 19,90019,900 | $1,916 | — | — |
| 11 | UBS Group AG | 19,73719,737 | $1,480 | — | — |
| 12 | OMERS ADMINISTRATION Corp | 10,00010,000 | $1,020 | — | — |
Rows rank by the value each filer reported — 13F filers price their own positions, so a holder with fewer shares can rank just above one with more.
| Holder | 2024-Q4 | 2025-Q1 | 2025-Q2 | 2025-Q3 | 2025-Q4 | 2026-Q1 | Latest value |
|---|---|---|---|---|---|---|---|
| LMR Partners LLP | 897K | 897K | 897K | 897K | 897K | 897K | $71,791 |
| ARISTEIA CAPITAL, L.L.C. | 693K | 693K | 693K | 680K | 680K | 680K | $65,476 |
| Hudson Bay Capital Management LP | 468K | 465K | 465K | 465K | 465K | 465K | $37,218 |
| Anson Funds Management LP | 12K | 12K | 12K | 12K | 12K | 24K | $37,156 |
| Sculptor Capital LP | 339K | 339K | 339K | 294K | 294K | 294K | $28,293 |
| Calamos Advisors LLC | 200K | 200K | 200K | 200K | 200K | 200K | $20,400 |
| MMCAP International Inc. SPC | 158K | 158K | 158K | 158K | 158K | 158K | $12,667 |
| CSS LLC/IL | 55K | 55K | 55K | 55K | 55K | 55K | $4,372 |
| WOLVERINE ASSET MANAGEMENT LLC | 72K | 2K | 224 | 12K | 27K | 27K | $2,186 |
| Saba Capital Management, L.P. | 20K | 20K | 20K | 20K | 20K | 20K | $1,916 |
| UBS Group AG | — | 24K | 20K | 20K | 20K | 20K | $1,480 |
| OMERS ADMINISTRATION Corp | 10K | 10K | 10K | 10K | 10K | 10K | $1,020 |
Shares reported each quarter by the largest current holders. Green = added vs the prior filing, red = trimmed, grey = roughly held; a dash is a quarter with no 13F on file (a gap is skipped, not read as an exit). 13F is filed up to 45 days after quarter-end. Up to 40 quarters (10 years) available — use the selector above.
Holder count only — too few computable %-of-shares-outstanding quarters for a % pane. Line breaks are quarters with no 13F record, never interpolated.
| Quarter | Holders | Shares held | % shares out | Value held |
|---|---|---|---|---|
| 2026-Q1 | 12 | 2,849,959 | — | $283,975 |
| 2025-Q4 | 12 | 2,838,130 | — | $346,880 |
| 2025-Q3 | 12 | 2,822,753 | — | $470,707 |
| 2025-Q2 | 12 | 2,870,234 | — | $579,264 |
Short interest has its own tab now — open SI →
Source: SEC Form 13F — every institution manager (≥ $100M in 13F securities) reporting a long US-listed position, across ~10,250 filers over 10 years of history. 13F is long-only, US-listed, filed up to 45 days after quarter-end.
| Biggest buyers | Δ shares | Δ value | |
|---|---|---|---|
| Anson Funds Management LP | +11,833 | — | ADD |
| Biggest sellers | Δ shares | Δ value | |
|---|---|---|---|
| WOLVERINE ASSET MANAGEMENT LLC | −4 | — | — |
The 2025-Q4 register is as-filed in ITS OWN share basis; every count below was rebased into the 2026-Q1 basis (no split in between, factor 1). Dollar figures value the SHARE delta at one price — the quarter-end close — rather than differencing two filings' own reported values, which would mix the quarter's price move into the trade figure. No licensed quarter-end close is stored for this line, so the dollar columns are withheld; share counts stand.
13Fs disclose LONG US-listed positions only — shorts, most derivatives, bonds and non-US listings are invisible here, and a filer's quarter-over-quarter change is not necessarily a trade (index rebalances, in-kind transfers and entity successions all read as flow).
| 2025-Q1 |
| 12 |
| 2,875,063 |
| — |
| $1M |
| 2024-Q4 | 11 | 2,924,393 | — | $1M |
| 2024-Q3 | 15 | 15,023,251 | — | $6M |
| 2024-Q2 | 15 | 16,421,632 | — | $7M |
| 2024-Q1 | 16 | 16,683,819 | — | $12M |
| 2023-Q4 | 17 | 16,857,710 | — | $17M |
| 2023-Q3 | 16 | 5,612,905 | — | $6M |
| 2023-Q2 | 21 | 5,797,883 | — | $4M |
| 2023-Q1 | 21 | 6,996,896 | — | $4M |
| 2022-Q4 | 21 | 5,125,069 | — | $2M |
