Who owns 1RT Acquisition Corp. (ONCH)
Which tracked institutional funds hold ONCH, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See ONCH company fundamentals →
Ownership as of the 2026-Q1 13F filings (latest filed 2026-05-15). 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
15 tracked funds added or opened ONCH while 10 trimmed or exited it between 2025-Q4 and 2026-Q1 — the tape is split. When large holders disagree on a name, the funds moving first are sometimes ahead of the story.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
ONCH’s largest tracked holder by dollar value, METEORA CAPITAL, LLC, sizes it at 2.0% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 1.9pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in ONCH divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2025-Q4 and 2026-Q1, across 74 tracked filers holding ONCH, 28 increased or opened the position and 19 reduced or closed it; over the same quarter, there were no open-market insider Form 4s.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in ONCH between the 2025-Q4 and 2026-Q1 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 6
- SONA ASSET MANAGEMENT (US) LLC$2M
- WOLVERINE ASSET MANAGEMENT LLC$2M
- O'Connor Alternative Investments LLC$1M
- GLAZER CAPITAL, LLC$761K
- MIZUHO SECURITIES USA LLC$609K
- RLH Capital LLC$518K
Full exits 2
- ExodusPoint Capital Management, LP$3M
- OCONNOR, A Distinct Business Unit of UBS ASSET MANAGEMENT AMERICAS (LLC)$1M
Largest adds
- Linden Advisors LP$5M
- Radcliffe Capital Management, L.P.$2M
- Governors Lane LP$2M
- Periscope Capital Inc.$748K
- Verition Fund Management LLC$515K
- Centiva Capital, LP$506K
Largest trims
- METEORA CAPITAL, LLC$80M
- Harraden Circle Investments, LLC$55M
- TENOR CAPITAL MANAGEMENT Co., L.P.$9M
- Context Capital Management, LLC$8M
- Saba Capital Management, L.P.$3M
- HGC Investment Management Inc.$2M
Institutional holders
One row per tracked fund, largest reported value first. “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding. Rows marked stale are from an earlier filing than the security’s latest quarter — that fund is absent from the newest snapshot (position exited, or reported under a different name).
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| METEORA CAPITAL, LLC trimmed | 550,659 | $237M | 39.6% | 2026-Q1 |
| Harraden Circle Investments, LLC trimmed | 469,973 | $209M | 34.9% | 2026-Q1 |
| Context Capital Management, LLC trimmed | 62,500 | $28M | 4.6% | 2026-Q1 |
| TENOR CAPITAL MANAGEMENT Co., L.P. trimmed | 62,500 | $27M | 4.5% | 2026-Q1 |
| Point72 Asset Management, L.P. | 1,500,000 | $15M | 2.6% | 2026-Q1 |
| Linden Advisors LP added | 1,010,100 | $10M | 1.7% | 2026-Q1 |
| LMR Partners LLP | 700,000 | $7M | 1.2% | 2026-Q1 |
| J. Goldman & Co LP trimmed | 700,000 | $7M | 1.2% | 2026-Q1 |
| MMCAP International Inc. SPC | 600,000 | $6M | 1.0% | 2026-Q1 |
| Polar Asset Management Partners Inc. | 500,000 | $5M | 0.9% | 2026-Q1 |
| Radcliffe Capital Management, L.P. added | 385,436 | $4M | 0.7% | 2026-Q1 |
| First Trust Capital Management L.P. | 299,996 | $3M | 0.5% | 2026-Q1 |
| MILLENNIUM MANAGEMENT LLC added | 293,160 | $3M | 0.5% | 2026-Q1 |
| Ghisallo Capital Management LLC | 250,000 | $3M | 0.4% | 2026-Q1 |
| CITADEL ADVISORS LLC trimmed | 169,701 | $2M | 0.3% | 2026-Q1 |
| SONA ASSET MANAGEMENT (US) LLC new | 161,200 | $2M | 0.3% | 2026-Q1 |
| Shaolin Capital Management LLC added | 158,656 | $2M | 0.3% | 2026-Q1 |
| WOLVERINE ASSET MANAGEMENT LLC new | 154,248 | $2M | 0.3% | 2026-Q1 |
| TWO SIGMA INVESTMENTS, LP | 150,624 | $2M | 0.3% | 2026-Q1 |
| DLD Asset Management, LP added | 109,331 | $1M | 0.2% | 2026-Q1 |
| K2 PRINCIPAL FUND, L.P. | 100,000 | $1M | 0.2% | 2026-Q1 |
| O'Connor Alternative Investments LLC new | 100,000 | $1M | 0.2% | 2026-Q1 |
| ARISTEIA CAPITAL, L.L.C. | 100,000 | $1M | 0.2% | 2026-Q1 |
| Magnetar Financial LLC | 100,000 | $1M | 0.2% | 2026-Q1 |
| PICTON MAHONEY ASSET MANAGEMENT | 100,000 | $1M | 0.2% | 2026-Q1 |
| RIVERNORTH CAPITAL MANAGEMENT, LLC | 88,032 | $893K | 0.1% | 2026-Q1 |
| PEAK6 LLC | 75,000 | $771K | 0.1% | 2026-Q1 |
| Virtu Financial LLC trimmed | 75,157 | $762K | 0.1% | 2026-Q1 |
| GLAZER CAPITAL, LLC new | 75,000 | $761K | 0.1% | 2026-Q1 |
| BERKLEY W R CORP | 74,416 | $755K | 0.1% | 2026-Q1 |
| Kamunting Street Capital Management, L.P. | 60,000 | $617K | 0.1% | 2026-Q1 |
| MIZUHO SECURITIES USA LLC new | 60,253 | $609K | 0.1% | 2026-Q1 |
| Centiva Capital, LP added | 60,000 | $608K | 0.1% | 2026-Q1 |
| JPMORGAN CHASE & CO | 53,152 | $539K | 0.1% | 2026-Q1 |
| OMERS ADMINISTRATION Corp added | 49,991 | $514K | 0.1% | 2026-Q1 |
| RLH Capital LLC new | 49,959 | $507K | 0.1% | 2026-Q1 |
| READYSTATE ASSET MANAGEMENT LP added | 50,000 | $507K | 0.1% | 2026-Q1 |
| Mint Tower Capital Management B.V. trimmed | 50,000 | $507K | 0.1% | 2026-Q1 |
| GRITSTONE ASSET MANAGEMENT LLC added | 49,433 | $501K | 0.1% | 2026-Q1 |
| HRT FINANCIAL LP trimmed | 46,701 | $480K | 0.1% | 2026-Q1 |
| BOOTHBAY FUND MANAGEMENT, LLC | 46,070 | $467K | 0.1% | 2026-Q1 |
| Clear Street Group Inc. trimmed | 39,032 | $396K | 0.1% | 2026-Q1 |
| Westchester Capital Management, LLC | 30,820 | $317K | 0.1% | 2026-Q1 |
| D. E. Shaw & Co., Inc. added | 29,947 | $304K | 0.1% | 2026-Q1 |
| BNP PARIBAS FINANCIAL MARKETS added | 27,168 | $275K | 0.0% | 2026-Q1 |
| TORONTO DOMINION BANK added | 25,036 | $254K | 0.0% | 2026-Q1 |
| Hudson Bay Capital Management LP | 25,000 | $254K | 0.0% | 2026-Q1 |
| Yakira Capital Management, Inc. trimmed | 24,485 | $252K | 0.0% | 2026-Q1 |
| SCOGGIN MANAGEMENT LP | 20,000 | $206K | 0.0% | 2026-Q1 |
| Schonfeld Strategic Advisors LLC new | 20,000 | $203K | 0.0% | 2026-Q1 |
| Walleye Capital LLC | 10,000 | $103K | 0.0% | 2026-Q1 |
| TIG Advisors, LLC | 10,000 | $102K | 0.0% | 2026-Q1 |
| COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS | 10,000 | $102K | 0.0% | 2026-Q1 |
| Jain Global LLC | 223,575 | $100K | 0.0% | 2026-Q1 |
| Saba Capital Management, L.P. trimmed | 199,998 | $89K | 0.0% | 2026-Q1 |
| PenderFund Capital Management Ltd. added | 5,000 | $51K | 0.0% | 2026-Q1 |
| Governors Lane LP | 78,927 | $35K | 0.0% | 2026-Q1 |
| WHITEBOX ADVISORS LLC trimmed | 65,000 | $28K | 0.0% | 2026-Q1 |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND trimmed | 62,500 | $27K | 0.0% | 2026-Q1 |
| MOORE CAPITAL MANAGEMENT, LP | 62,500 | $27K | 0.0% | 2026-Q1 |
| HBK INVESTMENTS L P | 62,501 | $27K | 0.0% | 2026-Q1 |
| Verition Fund Management LLC trimmed | 60,450 | $26K | 0.0% | 2026-Q1 |
| HGC Investment Management Inc. trimmed | 50,000 | $22K | 0.0% | 2026-Q1 |
| Parallax Volatility Advisers, L.P. added | 35,165 | $16K | 0.0% | 2026-Q1 |
| Cable Car Capital, LP trimmed | 31,250 | $14K | 0.0% | 2026-Q1 |
| Periscope Capital Inc. | 19,900 | $9K | 0.0% | 2026-Q1 |
| AQR Arbitrage LLC added | 19,061 | $8K | 0.0% | 2026-Q1 |
| Quarry LP trimmed | 12,500 | $6K | 0.0% | 2026-Q1 |
| Galaxy Digital Inc. new | 12,500 | $5K | 0.0% | 2026-Q1 |
| Kepos Capital LP new | 5,875 | $3K | 0.0% | 2026-Q1 |
| Alberta Investment Management Corp | 6,250 | $3K | 0.0% | 2026-Q1 |
| Davidson Kempner Capital Management LP trimmed | 6,249 | $3K | 0.0% | 2026-Q1 |
| UBS Group AG added | 179 | $2K | 0.0% | 2026-Q1 |
| MORGAN STANLEY added | 78 | $791 | 0.0% | 2026-Q1 |
| ExodusPoint Capital Management, LP | 250,000 | $3M | 0.4% | 2025-Q4 stale |
| Wealthspring Capital LLC new | 100,000 | $1M | 0.2% | 2025-Q3 stale |
| OCONNOR, A Distinct Business Unit of UBS ASSET MANAGEMENT AMERICAS (LLC) new | 100,000 | $1M | 0.2% | 2025-Q4 stale |
| CANTOR FITZGERALD, L. P. new | 750,000 | $668K | 0.1% | 2025-Q3 stale |
| FIFTH LANE CAPITAL, LP new | 50,000 | $524K | 0.1% | 2025-Q3 stale |
| Tuttle Capital Management, LLC new | 40,000 | $422K | 0.1% | 2025-Q3 stale |
| Diametric Capital, LP new | 11,489 | $121K | 0.0% | 2025-Q3 stale |
| MASO CAPITAL PARTNERS Ltd new | 10,000 | $106K | 0.0% | 2025-Q3 stale |
| HARBERT FUND ADVISORS, INC. new | 10,000 | $106K | 0.0% | 2025-Q3 stale |
| Bulldog Investors, LLP new | 10,000 | $106K | 0.0% | 2025-Q3 stale |
| KRYGER CAPITAL Ltd new | 10,134 | $105K | 0.0% | 2025-Q4 stale |
| Sandia Investment Management LP | 10,000 | $104K | 0.0% | 2025-Q4 stale |
| SYQUANT CAPITAL SAS | 10,000 | $104K | 0.0% | 2025-Q4 stale |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP new | 15,219 | $13K | 0.0% | 2025-Q3 stale |
| Galaxy Group Investments LLC trimmed | 12,500 | $7K | 0.0% | 2025-Q4 stale |
| FNY Investment Advisers, LLC new | 682 | $7K | 0.0% | 2025-Q3 stale |
| BANK OF AMERICA CORP /DE/ added | 4,287 | $2K | 0.0% | 2025-Q4 stale |
| ROYAL BANK OF CANADA | 167 | $2K | 0.0% | 2025-Q4 stale |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.