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Institutional Ownership · SEC Form 13F

Who owns Armada Acquisition Corp. II (XRPN)


Which tracked institutional funds hold XRPN, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See XRPN 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.

109
Institutional holders
35M
Shares held (tracked funds)

How the tape is positioned

15 tracked funds added or opened XRPN while 21 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

XRPN’s largest tracked holder by dollar value, TENOR CAPITAL MANAGEMENT Co., L.P., sizes it at 6.3% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 6.3pp conviction gap — its largest holder concentrates the name more heavily than the typical one.

Book-share is each fund’s reported value in XRPN 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 77 tracked filers holding XRPN, 27 increased or opened the position and 30 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 XRPN 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 4

  • RLH Capital LLC$5M
  • MIZUHO SECURITIES USA LLC$5M
  • O'Connor Alternative Investments LLC$5M
  • HIGHBRIDGE CAPITAL MANAGEMENT LLC$3M

Full exits 7

  • Pantera Capital Partners LP$10M
  • TWO SIGMA INVESTMENTS, LP$7M
  • COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS$2M
  • OCONNOR, A Distinct Business Unit of UBS ASSET MANAGEMENT AMERICAS (LLC)$2M
  • Bulldog Investors, LLP$1M
  • STEADFAST CAPITAL MANAGEMENT LP$855K

Largest adds

  • BERKLEY W R CORP$7M
  • WOLVERINE ASSET MANAGEMENT LLC$5M
  • JPMORGAN CHASE & CO$2M
  • Verition Fund Management LLC$2M
  • Quarry LP$2M
  • COMMONWEALTH EQUITY SERVICES, LLC$970K

Largest trims

  • Harraden Circle Investments, LLC$412M
  • METEORA CAPITAL, LLC$228M
  • TENOR CAPITAL MANAGEMENT Co., L.P.$217M
  • Context Capital Management, LLC$65M
  • RIVERNORTH CAPITAL MANAGEMENT, LLC$5M
  • TORONTO DOMINION BANK$4M

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
TENOR CAPITAL MANAGEMENT Co., L.P. trimmed750,000$450M40.3%2026-Q1
Harraden Circle Investments, LLC trimmed487,579$292M26.2%2026-Q1
BERKLEY W R CORP added1,233,735$13M1.1%2026-Q1
AQR Arbitrage LLC added1,056,579$11M1.0%2026-Q1
Linden Advisors LP added800,000$8M0.7%2026-Q1
WOLVERINE ASSET MANAGEMENT LLC added573,999$6M0.5%2026-Q1
ARISTEIA CAPITAL, L.L.C. trimmed500,000$5M0.5%2026-Q1
METEORA CAPITAL, LLC trimmed23,395$5M0.4%2026-Q1
RLH Capital LLC new462,808$5M0.4%2026-Q1
MILLENNIUM MANAGEMENT LLC454,850$5M0.4%2026-Q2
First Trust Capital Management L.P.458,864$5M0.4%2026-Q1
MIZUHO SECURITIES USA LLC added458,272$5M0.4%2026-Q1
GOLDMAN SACHS GROUP INC365,976$4M0.3%2026-Q1
Context Capital Management, LLC350,000$4M0.3%2026-Q1
Quarry LP added307,137$3M0.3%2026-Q1
O'Connor Alternative Investments LLC new300,000$3M0.3%2026-Q1
HIGHBRIDGE CAPITAL MANAGEMENT LLC added274,729$3M0.3%2026-Q1
JPMORGAN CHASE & CO added274,729$3M0.3%2026-Q1
Karpus Management, Inc. trimmed259,300$3M0.2%2026-Q1
SkyView Investment Advisors, LLC250,000$3M0.2%2026-Q1
Mint Tower Capital Management B.V. added250,000$3M0.2%2026-Q1
GLAZER CAPITAL, LLC trimmed200,852$2M0.2%2026-Q1
PICTON MAHONEY ASSET MANAGEMENT200,000$2M0.2%2026-Q1
DLD Asset Management, LP199,130$2M0.2%2026-Q1
HEIGHTS CAPITAL MANAGEMENT, INC191,267$2M0.2%2026-Q1
COMMONWEALTH EQUITY SERVICES, LLC added176,438$2M0.2%2026-Q1
Cable Car Capital, LP150,000$2M0.1%2026-Q1
Walleye Capital LLC added140,000$1M0.1%2026-Q1
Clear Street Group Inc. added126,427$1M0.1%2026-Q1
Hudson Bay Capital Management LP trimmed119,564$1M0.1%2026-Q2
READYSTATE ASSET MANAGEMENT LP99,086$1M0.1%2026-Q1
Verition Fund Management LLC trimmed101,364$1M0.1%2026-Q2
CITIGROUP INC100,000$1M0.1%2026-Q1
Cambridge Investment Research Advisors, Inc. added96,276$993K0.1%2026-Q1
BOOTHBAY FUND MANAGEMENT, LLC trimmed96,110$991K0.1%2026-Q1
CSS LLC/IL70,068$722K0.1%2026-Q1
Diametric Capital, LP trimmed57,499$593K0.1%2026-Q1
MORGAN STANLEY trimmed50,561$521K0.0%2026-Q1
HRT FINANCIAL LP added42,050$433K0.0%2026-Q1
BNP PARIBAS FINANCIAL MARKETS trimmed40,503$418K0.0%2026-Q1
Magnetar Financial LLC trimmed341,200$290K0.0%2026-Q2
Shaolin Capital Management LLC added433,866$260K0.0%2026-Q1
GEODE CAPITAL MANAGEMENT, LLC added21,524$222K0.0%2026-Q1
HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND350,000$210K0.0%2026-Q1
Virtu Financial LLC trimmed18,562$191K0.0%2026-Q1
Polar Asset Management Partners Inc.300,000$180K0.0%2026-Q1
Wealthspring Capital LLC290,865$174K0.0%2026-Q1
LMR Partners LLP285,704$171K0.0%2026-Q1
EverSource Wealth Advisors, LLC added1,241$152K0.0%2026-Q1
RIVERNORTH CAPITAL MANAGEMENT, LLC253,166$152K0.0%2026-Q1
PRELUDE CAPITAL MANAGEMENT, LLC14,555$150K0.0%2026-Q1
Mann Financial Group, Inc. added12,450$128K0.0%2026-Q1
Radcliffe Capital Management, L.P. trimmed207,006$122K0.0%2026-Q1
Saba Capital Management, L.P.183,597$110K0.0%2026-Q1
RK Capital Management, LLC/FL166,711$100K0.0%2026-Q1
Sculptor Capital LP trimmed142,520$84K0.0%2026-Q1
Arrington Capital Management, LLC trimmed140,000$84K0.0%2026-Q1
Westchester Capital Management, LLC100,055$60K0.0%2026-Q1
MOORE CAPITAL MANAGEMENT, LP trimmed100,000$60K0.0%2026-Q1
WHITEBOX ADVISORS LLC trimmed100,000$60K0.0%2026-Q1
CITADEL ADVISORS LLC trimmed99,942$60K0.0%2026-Q1
Periscope Capital Inc. trimmed90,000$54K0.0%2026-Q1
HUNTINGTON NATIONAL BANK added3,001$31K0.0%2026-Q1
Purpose Unlimited Inc. new2,800$29K0.0%2026-Q1
ROYAL BANK OF CANADA new1,975$20K0.0%2026-Q1
UBS Group AG trimmed1,158$12K0.0%2026-Q1
CENTRAL TRUST Co new1,000$10K0.0%2026-Q1
PNC FINANCIAL SERVICES GROUP, INC. new975$10K0.0%2026-Q1
FNY Investment Advisers, LLC added990$10K0.0%2026-Q1
Ground Swell Capital, LLC new16,427$10K0.0%2026-Q1
Skaana Management L.P.16,025$10K0.0%2026-Q1
OSAIC HOLDINGS, INC.600$6K0.0%2026-Q1
Glass Jacobson Investment Advisors llc582$6K0.0%2026-Q1
Parallax Volatility Advisers, L.P. trimmed10,000$6K0.0%2026-Q1
TORONTO DOMINION BANK trimmed10,000$3K0.0%2026-Q1
Creative Capital Management Investments LLC new100$1K0.0%2026-Q1
NATIONAL BANK OF CANADA /FI/27$160.0%2026-Q1
Decagon Asset Management LLP added231,385$220M19.7%2025-Q3 stale
Pantera Capital Partners LP new1,000,000$10M0.9%2025-Q4 stale
TWO SIGMA INVESTMENTS, LP664,583$7M0.6%2025-Q4 stale
HGC Investment Management Inc. new250,000$3M0.2%2025-Q2 stale
Centiva Capital, LP new250,000$3M0.2%2025-Q2 stale
COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS added200,000$2M0.2%2025-Q4 stale
MANGROVE PARTNERS IM, LLC new185,700$2M0.2%2025-Q2 stale
OCONNOR, A Distinct Business Unit of UBS ASSET MANAGEMENT AMERICAS (LLC) new150,000$2M0.1%2025-Q4 stale
Crossingbridge Advisors, LLC new146,325$1M0.1%2025-Q2 stale
Bulldog Investors, LLP added100,000$1M0.1%2025-Q4 stale
STEADFAST CAPITAL MANAGEMENT LP80,000$819K0.1%2025-Q4 stale
Schonfeld Strategic Advisors LLC added50,069$513K0.0%2025-Q4 stale
StoneX Group Inc. new50,000$502K0.0%2025-Q2 stale
ATW SPAC MANAGEMENT LLC trimmed47,500$496K0.0%2025-Q3 stale
Warberg Asset Management LLC new30,000$306K0.0%2025-Q2 stale
CANTOR FITZGERALD, L. P. new266,091$253K0.0%2025-Q3 stale
Driehaus Capital Management LLC74,999$71K0.0%2025-Q3 stale
CLEAR STREET LLC new5,000$50K0.0%2025-Q2 stale
Caitlin John, LLC new1,600$16K0.0%2025-Q4 stale
Stone House Investment Management, LLC new100$1K0.0%2025-Q4 stale
Global Retirement Partners, LLC new50$5120.0%2025-Q4 stale
CONCOURSE FINANCIAL GROUP SECURITIES, INC. new00.0%2025-Q2 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