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Disclosery

ONCH 1RT ACQUISITION CORP.

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

57 managers (57 13F filers) reported a position in ONCH shares at 2026-03-31, 11,784,052 shares in all. 8 filers opened a position and 2 filers sold out during the quarter.

Managers
57
13F filers
57
New
8
Added
12
Reduced
7
Sold out
2
Shares held by filers
11,784,052

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
Meteora Capital, LLC1,705,014$17.3M1.28%+166,00013F-HRTimeline
Linden Advisors LPin group Linden Advisors LP1,010,100$10.2M0.06%+500,00013F-HRTimelineGroup
Jain Global LLC891,221$9.04M0.12%-1,00013F-HRTimeline
Governors Lane LP750,000$7.61M0.95%+227,33713F-HRTimeline
J. Goldman & Co LP700,000$7.1M0.33%-162,50013F-HRTimeline
MMCAP International Inc. SPCin group MMCAP600,000$6.08M0.53%013F-HRTimelineGroup
Saba Capital Management, L.P.in group Saba Capital Management, L.P.524,932$5.33M0.17%-250,00013F-HRTimelineGroup
Radcliffe Capital Management, L.P.385,436$3.91M0.29%+246,14413F-HRTimeline
Verition Fund Management LLC345,235$3.5M0.03%+52,26613F-HRTimeline
First Trust Capital Management L.P.in group FIRST TRUST ADVISORS LP299,996$3.04M0.16%013F-HRTimelineGroup
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC293,160$2.97M<0.01%+31,20813F-HRTimelineGroup
WHITEBOX ADVISORS LLC260,000$2.64M0.04%013F-HRTimeline
Context Capital Management, LLC250,000$2.54M0.06%013F-HRTimeline
TENOR CAPITAL MANAGEMENT Co., L.P.250,000$2.54M0.04%013F-HRTimeline
MOORE CAPITAL MANAGEMENT, LP250,000$2.54M0.09%013F-HRTimeline
HEALTHCARE OF ONTARIO PENSION PLAN TRUS…250,000$2.54M<0.01%013F-HRTimeline
HBK INVESTMENTS L P249,304$2.53M0.03%013F-HRTimeline
Mint Tower Capital Management B.V.200,000$2.03M0.19%013F-HRTimeline
SONA ASSET MANAGEMENT (US) LLCin group SONA ASSET MANAGEMENT (US) LLC161,200$1.63M0.06%new13F-HRTimelineGroup
Shaolin Capital Management LLC158,656$1.61M0.07%-41,34413F-HRTimeline
WOLVERINE ASSET MANAGEMENT LLCin group WOLVERINE ASSET MANAGEMENT LLC154,248$1.56M0.02%new13F-HRTimelineGroup
Periscope Capital Inc.153,962$1.56M0.27%+74,36213F-HRTimeline
TWO SIGMA INVESTMENTS, LPin group TWO SIGMA INVESTMENTS, LP150,624$1.53M<0.01%013F-HRTimelineGroup
Cable Car Capital, LP125,000$1.27M0.44%013F-HRTimeline
DLD Asset Management, LP109,331$1.11M0.11%013F-HRTimeline
ARISTEIA CAPITAL, L.L.C.100,000$1.01M0.02%013F-HRTimeline
Magnetar Financial LLCin group Magnetar Financial LLC100,000$1.01M0.01%013F-HRTimelineGroup
K2 PRINCIPAL FUND, L.P.100,000$1.01M0.11%013F-HRTimeline
PICTON MAHONEY ASSET MANAGEMENT100,000$1.01M0.01%013F-HRTimeline
O'Connor Alternative Investments LLC100,000$1.01M0.05%13F-HRTimelineThe filing omitted confidential holdings, a later amendment may add them.
RIVERNORTH CAPITAL MANAGEMENT, LLC88,032$893K0.05%013F-HRTimeline
Virtu Financial LLCin group Virtu Financial LLC75,157$762K0.03%-5,13113F-HRTimelineGroup
GLAZER CAPITAL, LLCin group GLAZER CAPITAL, LLC75,000$761K0.02%new13F-HRTimelineGroup
BERKLEY W R CORP74,416$755K0.04%013F-HRTimeline
AQR Arbitrage LLCin group AQR CAPITAL MANAGEMENT LLC73,135$742K0.01%-2,79713F-HRTimelineGroup
MIZUHO SECURITIES USA LLCin group MIZUHO FINANCIAL GROUP INC60,253$609K0.01%new13F-HRTimelineGroup
Centiva Capital, LP60,000$608K0.03%+50,00013F-HRTimeline
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO53,152$539K<0.01%013F-HR/ATimelineGroup
Quarry LP49,959$507K0.1%013F-HRTimeline
RLH Capital LLC49,959$507K0.26%13F-HRTimeline
READYSTATE ASSET MANAGEMENT LP50,000$507K0.03%new13F-HRTimeline
GRITSTONE ASSET MANAGEMENT LLC49,433$501K0.54%013F-HRTimeline
BOOTHBAY FUND MANAGEMENT, LLC46,070$467K0.01%013F-HRTimeline
Clear Street Group Inc.in group Clear Street Group Inc.39,032$396K<0.01%-26,22813F-HRTimelineGroup
D. E. Shaw & Co., Inc.in group D. E. Shaw & Co., Inc.29,947$304K<0.01%+19,94713F-HRTimelineGroup
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS27,168$275K<0.01%+3,10813F-HRTimelineGroup
TORONTO DOMINION BANKin group TORONTO DOMINION BANK25,036$254K<0.01%+17,43613F-HRTimelineGroup
Hudson Bay Capital Management LPin group Hudson Bay Capital Management…25,000$254K<0.01%013F-HRTimelineGroup
Alberta Investment Management Corp25,000$254K<0.01%013F-HRTimeline
Davidson Kempner Capital Management LP25,000$254K<0.01%013F-HRTimelineThe filing omitted confidential holdings, a later amendment may add them.
Schonfeld Strategic Advisors LLC20,000$203K<0.01%new13F-HRTimeline
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC10,657$108K<0.01%new13F-HRTimelineGroup
COMMONWEALTH OF PENNSYLVANIA PUBLIC SCH…10,000$102K<0.01%013F-HRTimeline
TIG Advisors, LLCin group TIG Advisors, LLC10,000$102K<0.01%013F-HRTimelineGroup
PenderFund Capital Management Ltd.5,000$50.7K0.01%013F-HRTimeline
UBS Group AGin group UBS Group AG149$1.51K<0.01%new13F-HRTimelineGroup
MORGAN STANLEYin group MORGAN STANLEY78$791<0.01%+3213F-HRTimelineGroup