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Institutional Ownership · SEC Form 13F

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.

118
Institutional holders
18M
Shares held (tracked funds)

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).

FundSharesReported value% of valueQuarter
METEORA CAPITAL, LLC trimmed550,659$237M39.6%2026-Q1
Harraden Circle Investments, LLC trimmed469,973$209M34.9%2026-Q1
Context Capital Management, LLC trimmed62,500$28M4.6%2026-Q1
TENOR CAPITAL MANAGEMENT Co., L.P. trimmed62,500$27M4.5%2026-Q1
Point72 Asset Management, L.P.1,500,000$15M2.6%2026-Q1
Linden Advisors LP added1,010,100$10M1.7%2026-Q1
LMR Partners LLP700,000$7M1.2%2026-Q1
J. Goldman & Co LP trimmed700,000$7M1.2%2026-Q1
MMCAP International Inc. SPC600,000$6M1.0%2026-Q1
Polar Asset Management Partners Inc.500,000$5M0.9%2026-Q1
Radcliffe Capital Management, L.P. added385,436$4M0.7%2026-Q1
First Trust Capital Management L.P.299,996$3M0.5%2026-Q1
MILLENNIUM MANAGEMENT LLC added293,160$3M0.5%2026-Q1
Ghisallo Capital Management LLC250,000$3M0.4%2026-Q1
CITADEL ADVISORS LLC trimmed169,701$2M0.3%2026-Q1
SONA ASSET MANAGEMENT (US) LLC new161,200$2M0.3%2026-Q1
Shaolin Capital Management LLC added158,656$2M0.3%2026-Q1
WOLVERINE ASSET MANAGEMENT LLC new154,248$2M0.3%2026-Q1
TWO SIGMA INVESTMENTS, LP150,624$2M0.3%2026-Q1
DLD Asset Management, LP added109,331$1M0.2%2026-Q1
K2 PRINCIPAL FUND, L.P.100,000$1M0.2%2026-Q1
O'Connor Alternative Investments LLC new100,000$1M0.2%2026-Q1
ARISTEIA CAPITAL, L.L.C.100,000$1M0.2%2026-Q1
Magnetar Financial LLC100,000$1M0.2%2026-Q1
PICTON MAHONEY ASSET MANAGEMENT100,000$1M0.2%2026-Q1
RIVERNORTH CAPITAL MANAGEMENT, LLC88,032$893K0.1%2026-Q1
PEAK6 LLC75,000$771K0.1%2026-Q1
Virtu Financial LLC trimmed75,157$762K0.1%2026-Q1
GLAZER CAPITAL, LLC new75,000$761K0.1%2026-Q1
BERKLEY W R CORP74,416$755K0.1%2026-Q1
Kamunting Street Capital Management, L.P.60,000$617K0.1%2026-Q1
MIZUHO SECURITIES USA LLC new60,253$609K0.1%2026-Q1
Centiva Capital, LP added60,000$608K0.1%2026-Q1
JPMORGAN CHASE & CO53,152$539K0.1%2026-Q1
OMERS ADMINISTRATION Corp added49,991$514K0.1%2026-Q1
RLH Capital LLC new49,959$507K0.1%2026-Q1
READYSTATE ASSET MANAGEMENT LP added50,000$507K0.1%2026-Q1
Mint Tower Capital Management B.V. trimmed50,000$507K0.1%2026-Q1
GRITSTONE ASSET MANAGEMENT LLC added49,433$501K0.1%2026-Q1
HRT FINANCIAL LP trimmed46,701$480K0.1%2026-Q1
BOOTHBAY FUND MANAGEMENT, LLC46,070$467K0.1%2026-Q1
Clear Street Group Inc. trimmed39,032$396K0.1%2026-Q1
Westchester Capital Management, LLC30,820$317K0.1%2026-Q1
D. E. Shaw & Co., Inc. added29,947$304K0.1%2026-Q1
BNP PARIBAS FINANCIAL MARKETS added27,168$275K0.0%2026-Q1
TORONTO DOMINION BANK added25,036$254K0.0%2026-Q1
Hudson Bay Capital Management LP25,000$254K0.0%2026-Q1
Yakira Capital Management, Inc. trimmed24,485$252K0.0%2026-Q1
SCOGGIN MANAGEMENT LP20,000$206K0.0%2026-Q1
Schonfeld Strategic Advisors LLC new20,000$203K0.0%2026-Q1
Walleye Capital LLC10,000$103K0.0%2026-Q1
TIG Advisors, LLC10,000$102K0.0%2026-Q1
COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS10,000$102K0.0%2026-Q1
Jain Global LLC223,575$100K0.0%2026-Q1
Saba Capital Management, L.P. trimmed199,998$89K0.0%2026-Q1
PenderFund Capital Management Ltd. added5,000$51K0.0%2026-Q1
Governors Lane LP78,927$35K0.0%2026-Q1
WHITEBOX ADVISORS LLC trimmed65,000$28K0.0%2026-Q1
HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND trimmed62,500$27K0.0%2026-Q1
MOORE CAPITAL MANAGEMENT, LP62,500$27K0.0%2026-Q1
HBK INVESTMENTS L P62,501$27K0.0%2026-Q1
Verition Fund Management LLC trimmed60,450$26K0.0%2026-Q1
HGC Investment Management Inc. trimmed50,000$22K0.0%2026-Q1
Parallax Volatility Advisers, L.P. added35,165$16K0.0%2026-Q1
Cable Car Capital, LP trimmed31,250$14K0.0%2026-Q1
Periscope Capital Inc.19,900$9K0.0%2026-Q1
AQR Arbitrage LLC added19,061$8K0.0%2026-Q1
Quarry LP trimmed12,500$6K0.0%2026-Q1
Galaxy Digital Inc. new12,500$5K0.0%2026-Q1
Kepos Capital LP new5,875$3K0.0%2026-Q1
Alberta Investment Management Corp6,250$3K0.0%2026-Q1
Davidson Kempner Capital Management LP trimmed6,249$3K0.0%2026-Q1
UBS Group AG added179$2K0.0%2026-Q1
MORGAN STANLEY added78$7910.0%2026-Q1
ExodusPoint Capital Management, LP250,000$3M0.4%2025-Q4 stale
Wealthspring Capital LLC new100,000$1M0.2%2025-Q3 stale
OCONNOR, A Distinct Business Unit of UBS ASSET MANAGEMENT AMERICAS (LLC) new100,000$1M0.2%2025-Q4 stale
CANTOR FITZGERALD, L. P. new750,000$668K0.1%2025-Q3 stale
FIFTH LANE CAPITAL, LP new50,000$524K0.1%2025-Q3 stale
Tuttle Capital Management, LLC new40,000$422K0.1%2025-Q3 stale
Diametric Capital, LP new11,489$121K0.0%2025-Q3 stale
MASO CAPITAL PARTNERS Ltd new10,000$106K0.0%2025-Q3 stale
HARBERT FUND ADVISORS, INC. new10,000$106K0.0%2025-Q3 stale
Bulldog Investors, LLP new10,000$106K0.0%2025-Q3 stale
KRYGER CAPITAL Ltd new10,134$105K0.0%2025-Q4 stale
Sandia Investment Management LP10,000$104K0.0%2025-Q4 stale
SYQUANT CAPITAL SAS10,000$104K0.0%2025-Q4 stale
SUSQUEHANNA INTERNATIONAL GROUP, LLP new15,219$13K0.0%2025-Q3 stale
Galaxy Group Investments LLC trimmed12,500$7K0.0%2025-Q4 stale
FNY Investment Advisers, LLC new682$7K0.0%2025-Q3 stale
BANK OF AMERICA CORP /DE/ added4,287$2K0.0%2025-Q4 stale
ROYAL BANK OF CANADA167$2K0.0%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.

HoldersTotal shares

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.

Learn how to read institutional ownership