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Disclosery

ONCHW 1RT ACQUISITION CORP.

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*W EXP 06/26/203 (warrant or right), issuer CIK 2054272

42 managers (42 13F filers) reported a position in ONCHW shares at 2026-03-31, 2,826,056 shares in all. 3 filers opened a position and 1 filer sold out during the quarter.

Managers
42
13F filers
42
New
3
Added
6
Reduced
1
Sold out
1
Shares held by filers
2,826,056

Shares held by filers adds up every 13F filer's report, so a share reported by a parent and by its subsidiary counts twice (H9). Managers counts each filer group once.

13D and 13G filers

No 13D or 13G on this security in the data. Structured 13D/G data starts 2024-12-18.

Insider trades

No Form 4 transaction on this security in the data.

13F holders, Q1 2026

Filers in the available 13F reports with a share position at 2026-03-31, filer groups collapsed to one row (method), largest first. Options and principal amounts are left out. A group row states no % of portfolio, since each member reports its own portfolio: the members' percents are listed under it. A value about 1,000 times or 1/1,000 of the price other filers imply is shown as filed but neither ranks the row nor enters a sum.

HolderSharesValue% of portfolioChangeSource
Mint Tower Capital Management B.V.50,000$507K0.05%013F-HRTimeline
Meteora Capital, LLC550,659$237K0.02%+2,23313F-HRTimeline
Harraden Circle Investments, LLCin group Harraden Circle Investments, …469,973$209K0.04%+40,62513F-HRTimelineGroup
BOOTHBAY FUND MANAGEMENT, LLC13,397$136K<0.01%+1,37513F-HRTimeline
Jain Global LLC223,575$99.5K<0.01%013F-HRTimeline
Saba Capital Management, L.P.in group Saba Capital Management, L.P.199,998$89K<0.01%013F-HRTimelineGroup
MMCAP International Inc. SPCin group MMCAP150,000$64.5K0.01%013F-HRTimelineGroup
Linden Advisors LPin group Linden Advisors LP127,524$56.8K<0.01%013F-HRTimelineGroup
Governors Lane LP78,927$35.1K<0.01%013F-HRTimeline
WHITEBOX ADVISORS LLC65,000$28K<0.01%013F-HRTimeline
Context Capital Management, LLC62,500$27.8K<0.01%013F-HRTimeline
TENOR CAPITAL MANAGEMENT Co., L.P.62,500$26.9K<0.01%013F-HRTimeline
MOORE CAPITAL MANAGEMENT, LP62,500$26.9K<0.01%013F-HRTimeline
HEALTHCARE OF ONTARIO PENSION PLAN TRUS…62,500$26.9K<0.01%013F-HRTimeline
HBK INVESTMENTS L P62,501$26.9K<0.01%013F-HRTimeline
Verition Fund Management LLC60,450$26K<0.01%+20,85013F-HRTimeline
Shaolin Capital Management LLC56,804$24.4K<0.01%013F-HRTimeline
HGC Investment Management Inc.50,000$21.5K<0.01%new13F-HRTimeline
Parallax Volatility Advisers, L.P.35,165$16.2K<0.01%+17,47313F-HRTimeline
Cable Car Capital, LP31,250$13.9K<0.01%013F-HRTimeline
DLD Asset Management, LP27,209$11.7K<0.01%013F-HRTimeline
RLH Capital LLC25,250$11.2K0.01%13F-HRTimeline
Magnetar Financial LLCin group Magnetar Financial LLC25,000$11.1K<0.01%013F-HRTimelineGroup
ARISTEIA CAPITAL, L.L.C.24,998$11.1K<0.01%013F-HRTimeline
PICTON MAHONEY ASSET MANAGEMENT25,000$10.8K<0.01%013F-HRTimeline
K2 PRINCIPAL FUND, L.P.25,000$10.8K<0.01%013F-HRTimeline
RIVERNORTH CAPITAL MANAGEMENT, LLC22,008$9.47K<0.01%013F-HRTimeline
TORONTO DOMINION BANKin group TORONTO DOMINION BANK21,500$9.24K<0.01%013F-HRTimelineGroup
Periscope Capital Inc.19,900$8.86K<0.01%013F-HRTimeline
BERKLEY W R CORP18,604$8.28K<0.01%013F-HRTimeline
Clear Street Group Inc.in group Clear Street Group Inc.19,149$8.24K<0.01%-6,76413F-HRTimelineGroup
AQR Arbitrage LLCin group AQR CAPITAL MANAGEMENT LLC19,061$8.2K<0.01%+7813F-HRTimelineGroup
Radcliffe Capital Management, L.P.14,830$6.6K<0.01%013F-HRTimeline
Quarry LP12,500$5.56K<0.01%013F-HRTimeline
Galaxy Digital Inc.in group Galaxy Group Investments LLC12,500$5.38K<0.01%13F-HRTimelineGroup
GRITSTONE ASSET MANAGEMENT LLC12,358$5.32K0.01%013F-HRTimeline
Kepos Capital LPin group Kepos Capital LP5,875$3K<0.01%new13F-HRTimelineGroup
Alberta Investment Management Corp6,250$2.69K<0.01%013F-HRTimeline
Davidson Kempner Capital Management LP6,249$2.69K<0.01%013F-HRTimelineThe filing omitted confidential holdings, a later amendment may add them.
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS6,015$2.68K<0.01%013F-HRTimelineGroup
PenderFund Capital Management Ltd.1,250$556<0.01%013F-HRTimeline
UBS Group AGin group UBS Group AG327$141<0.01%new13F-HRTimelineGroup