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Disclosery

ONCH 1RT ACQUISITION CORP.

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USD CL A ORD SHS (common), issuer CIK 2054272

50 managers (50 13F filers) reported a position in ONCH shares at 2025-12-31, 12,053,938 shares in all. 15 filers opened a position and 1 filer sold out during the quarter.

Managers
50
13F filers
50
New
15
Added
9
Reduced
0
Sold out
1
Shares held by filers
12,053,938

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, Q4 2025

Filers in the available 13F reports with a share position at 2025-12-31, 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
Meteora Capital, LLC1,539,014$15.7M1.31%+86,99213F-HRTimeline
Harraden Circle Investments, LLCin group Harraden Circle Investments, …1,500,192$15.3M2.8%013F-HRTimelineGroup
Jain Global LLC892,221$9.1M0.09%new13F-HRTimeline
J. Goldman & Co LP862,500$8.8M0.34%013F-HRTimeline
Saba Capital Management, L.P.in group Saba Capital Management, L.P.774,932$7.9M0.27%013F-HRTimelineGroup
MMCAP International Inc. SPCin group MMCAP600,000$6.12M0.61%new13F-HRTimelineGroup
Governors Lane LP522,663$5.33M0.49%+64,10813F-HRTimeline
Linden Advisors LPin group Linden Advisors LP510,100$5.2M0.03%013F-HRTimelineGroup
First Trust Capital Management L.P.in group FIRST TRUST ADVISORS LP299,996$3.06M0.19%013F-HRTimelineGroup
Verition Fund Management LLC292,969$2.99M0.02%+37,13913F-HRTimeline
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC261,952$2.67M<0.01%new13F-HRTimelineGroup
WHITEBOX ADVISORS LLC260,000$2.65M0.04%013F-HRTimeline
Context Capital Management, LLC250,000$2.55M0.07%013F-HRTimeline
TENOR CAPITAL MANAGEMENT Co., L.P.250,000$2.55M0.04%013F-HRTimeline
MOORE CAPITAL MANAGEMENT, LP250,000$2.55M0.05%new13F-HRTimeline
HEALTHCARE OF ONTARIO PENSION PLAN TRUS…250,000$2.55M<0.01%new13F-HRTimeline
ExodusPoint Capital Management, LP250,000$2.55M0.03%013F-HRTimeline
HBK INVESTMENTS L P249,304$2.54M0.03%013F-HRTimeline
Mint Tower Capital Management B.V.200,000$2.04M0.25%new13F-HRTimeline
Shaolin Capital Management LLC200,000$2.04M0.08%+120,24113F-HRTimeline
TWO SIGMA INVESTMENTS, LPin group TWO SIGMA INVESTMENTS, LP150,624$1.54M<0.01%013F-HRTimelineGroup
Radcliffe Capital Management, L.P.139,292$1.42M0.08%+78,06913F-HRTimeline
Cable Car Capital, LP125,000$1.27M0.08%new13F-HRTimeline
DLD Asset Management, LP109,331$1.12M0.12%new13F-HRTimeline
ARISTEIA CAPITAL, L.L.C.100,000$1.02M0.03%013F-HRTimeline
OCONNOR, A Distinct Business Unit of UB…100,000$1.02M0.03%013F-HRTimelineThe filing omitted confidential holdings, a later amendment may add them.
Magnetar Financial LLCin group Magnetar Financial LLC100,000$1.02M0.01%new13F-HRTimelineGroup
K2 PRINCIPAL FUND, L.P.100,000$1.02M0.11%013F-HRTimeline
PICTON MAHONEY ASSET MANAGEMENT100,000$1.02M0.01%013F-HRTimeline
RIVERNORTH CAPITAL MANAGEMENT, LLC88,032$898K0.04%+44,01613F-HRTimeline
Virtu Financial LLCin group Virtu Financial LLC80,288$819K0.03%new13F-HRTimelineGroup
Periscope Capital Inc.79,600$812K0.16%013F-HRTimeline
AQR Arbitrage LLCin group AQR CAPITAL MANAGEMENT LLC75,932$775K0.02%013F-HRTimelineGroup
BERKLEY W R CORP74,416$759K0.04%013F-HRTimeline
Clear Street Group Inc.in group Clear Street Group Inc.65,260$666K<0.01%+51,70013F-HRTimelineGroup
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO53,152$542K<0.01%013F-HRTimelineGroup
Quarry LP49,959$510K0.08%new13F-HRTimeline
GRITSTONE ASSET MANAGEMENT LLC49,433$504K0.48%013F-HRTimeline
BOOTHBAY FUND MANAGEMENT, LLC46,070$470K0.01%+3,13713F-HRTimeline
Hudson Bay Capital Management LPin group Hudson Bay Capital Management…25,000$255K<0.01%013F-HRTimelineGroup
Alberta Investment Management Corp25,000$255K<0.01%new13F-HR/ATimeline
Davidson Kempner Capital Management LP25,000$255K<0.01%013F-HRTimelineThe filing omitted confidential holdings, a later amendment may add them.
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS24,060$245K<0.01%013F-HRTimelineGroup
D. E. Shaw & Co., Inc.in group D. E. Shaw & Co., Inc.10,000$102K<0.01%013F-HRTimelineGroup
COMMONWEALTH OF PENNSYLVANIA PUBLIC SCH…10,000$102K<0.01%013F-HRTimeline
TIG Advisors, LLCin group TIG Advisors, LLC10,000$102K<0.01%new13F-HRTimelineGroup
Centiva Capital, LP10,000$102K0.01%013F-HRTimeline
TORONTO DOMINION BANKin group TORONTO DOMINION BANK7,600$77.5K<0.01%+2,70013F-HRTimelineGroup
PenderFund Capital Management Ltd.5,000$51K0.01%new13F-HRTimeline
MORGAN STANLEYin group MORGAN STANLEY46$469<0.01%new13F-HR/ATimelineGroup