Who owns Plum Acquisition Corp. IV (PLMK)
Which tracked institutional funds hold PLMK, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See PLMK 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.
How the tape is positioned
12 tracked funds added or opened PLMK 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
PLMK’s largest tracked holder by dollar value, METEORA CAPITAL, LLC, sizes it at 0.1% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.1pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in PLMK 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 56 tracked filers holding PLMK, 21 increased or opened the position and 24 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 PLMK 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
- SONA ASSET MANAGEMENT (US) LLC$4M
- CANTOR FITZGERALD, L. P.$2M
- JPMORGAN CHASE & CO$2M
- HIGHBRIDGE CAPITAL MANAGEMENT LLC$2M
Full exits 3
- COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS$1M
- HGC Investment Management Inc.$1M
- Centiva Capital, LP$1M
Largest adds
- TENOR CAPITAL MANAGEMENT Co., L.P.$80M
- Context Capital Management, LLC$37M
- TORONTO DOMINION BANK$5M
- BOOTHBAY FUND MANAGEMENT, LLC$3M
- MIZUHO SECURITIES USA LLC$2M
- MILLENNIUM MANAGEMENT LLC$984K
Largest trims
- METEORA CAPITAL, LLC$221M
- Governors Lane LP$7M
- First Trust Capital Management L.P.$4M
- Hudson Bay Capital Management LP$3M
- Westchester Capital Management, LLC$3M
- Verition Fund Management LLC$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).
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| METEORA CAPITAL, LLC added | 1,151,242 | $12M | 8.5% | 2026-Q1 |
| Westchester Capital Management, LLC trimmed | 921,100 | $10M | 6.8% | 2026-Q1 |
| BERKLEY W R CORP added | 804,192 | $8M | 6.0% | 2026-Q1 |
| GLAZER CAPITAL, LLC trimmed | 782,959 | $8M | 5.8% | 2026-Q1 |
| Linden Advisors LP added | 700,000 | $7M | 5.2% | 2026-Q1 |
| TENOR CAPITAL MANAGEMENT Co., L.P. | 700,000 | $7M | 5.2% | 2026-Q1 |
| Karpus Management, Inc. trimmed | 662,200 | $7M | 4.9% | 2026-Q1 |
| MIZUHO SECURITIES USA LLC added | 603,467 | $6M | 4.5% | 2026-Q1 |
| Context Capital Management, LLC added | 597,999 | $6M | 4.4% | 2026-Q1 |
| Alberta Investment Management Corp added | 500,000 | $5M | 3.7% | 2026-Q1 |
| LMR Partners LLP | 500,000 | $5M | 3.7% | 2026-Q1 |
| WOLVERINE ASSET MANAGEMENT LLC trimmed | 491,317 | $5M | 3.6% | 2026-Q1 |
| Radcliffe Capital Management, L.P. | 449,055 | $5M | 3.3% | 2026-Q1 |
| SONA ASSET MANAGEMENT (US) LLC new | 350,000 | $4M | 2.6% | 2026-Q1 |
| RIVERNORTH CAPITAL MANAGEMENT, LLC added | 344,356 | $4M | 2.6% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC added | 339,882 | $4M | 2.5% | 2026-Q1 |
| BOOTHBAY FUND MANAGEMENT, LLC added | 312,844 | $3M | 2.3% | 2026-Q1 |
| MILLENNIUM MANAGEMENT LLC trimmed | 300,098 | $3M | 2.2% | 2026-Q2 |
| First Trust Capital Management L.P. trimmed | 296,787 | $3M | 2.2% | 2026-Q1 |
| Jain Global LLC | 250,100 | $3M | 1.9% | 2026-Q1 |
| HEIGHTS CAPITAL MANAGEMENT, INC added | 250,000 | $3M | 1.9% | 2026-Q1 |
| CANTOR FITZGERALD, L. P. new | 190,105 | $2M | 1.4% | 2026-Q1 |
| JPMORGAN CHASE & CO new | 173,488 | $2M | 1.3% | 2026-Q1 |
| HIGHBRIDGE CAPITAL MANAGEMENT LLC new | 173,488 | $2M | 1.3% | 2026-Q1 |
| Hudson Bay Capital Management LP trimmed | 100,000 | $1M | 0.7% | 2026-Q2 |
| MOORE CAPITAL MANAGEMENT, LP added | 75,000 | $792K | 0.6% | 2026-Q1 |
| TWO SIGMA INVESTMENTS, LP trimmed | 56,094 | $598K | 0.4% | 2026-Q2 |
| TORONTO DOMINION BANK trimmed | 50,000 | $538K | 0.4% | 2026-Q1 |
| Kepos Capital LP | 50,000 | $528K | 0.4% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC added | 33,248 | $351K | 0.2% | 2026-Q1 |
| Walleye Capital LLC added | 542,051 | $271K | 0.2% | 2026-Q1 |
| Crossingbridge Advisors, LLC | 25,000 | $264K | 0.2% | 2026-Q1 |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND | 500,000 | $245K | 0.2% | 2026-Q1 |
| AQR Arbitrage LLC trimmed | 481,752 | $236K | 0.2% | 2026-Q1 |
| Lineage Point Capital LP new | 427,834 | $214K | 0.2% | 2026-Q1 |
| Polar Asset Management Partners Inc. trimmed | 350,000 | $171K | 0.1% | 2026-Q1 |
| Governors Lane LP trimmed | 350,000 | $157K | 0.1% | 2026-Q1 |
| HRT FINANCIAL LP new | 10,739 | $113K | 0.1% | 2026-Q1 |
| Magnetar Financial LLC trimmed | 250,000 | $112K | 0.1% | 2026-Q2 |
| CITADEL ADVISORS LLC trimmed | 10,175 | $107K | 0.1% | 2026-Q1 |
| Clear Street Group Inc. trimmed | 212,990 | $106K | 0.1% | 2026-Q1 |
| Shaolin Capital Management LLC trimmed | 182,859 | $91K | 0.1% | 2026-Q1 |
| Periscope Capital Inc. trimmed | 175,000 | $86K | 0.1% | 2026-Q1 |
| BNP PARIBAS FINANCIAL MARKETS | 169,785 | $85K | 0.1% | 2026-Q1 |
| DLD Asset Management, LP added | 161,846 | $81K | 0.1% | 2026-Q1 |
| Saba Capital Management, L.P. | 99,999 | $45K | 0.0% | 2026-Q1 |
| Wealthspring Capital LLC trimmed | 88,910 | $44K | 0.0% | 2026-Q1 |
| ARISTEIA CAPITAL, L.L.C. added | 98,501 | $44K | 0.0% | 2026-Q1 |
| Parallax Volatility Advisers, L.P. added | 57,443 | $34K | 0.0% | 2026-Q1 |
| D. E. Shaw & Co., Inc. | 75,000 | $34K | 0.0% | 2026-Q2 |
| PICTON MAHONEY ASSET MANAGEMENT trimmed | 50,000 | $25K | 0.0% | 2026-Q1 |
| WHITEBOX ADVISORS LLC trimmed | 50,000 | $25K | 0.0% | 2026-Q1 |
| Verition Fund Management LLC | 24,507 | $11K | 0.0% | 2026-Q2 |
| LONGFELLOW INVESTMENT MANAGEMENT CO LLC added | 474 | $5K | 0.0% | 2026-Q1 |
| UBS Group AG | 170 | $2K | 0.0% | 2026-Q1 |
| MORGAN STANLEY added | 77 | $813 | 0.0% | 2026-Q1 |
| Schechter Investment Advisors, LLC new | 232,000 | $2M | 1.6% | 2025-Q1 stale |
| K2 PRINCIPAL FUND, L.P. new | 195,699 | $2M | 1.4% | 2025-Q1 stale |
| MIZUHO SECURITIES USA LLC new | 150,372 | $2M | 1.1% | 2025-Q1 stale |
| BCK Capital Management LP added | 103,313 | $1M | 0.7% | 2025-Q3 stale |
| HGC Investment Management Inc. | 100,000 | $1M | 0.7% | 2025-Q4 stale |
| Centiva Capital, LP | 100,000 | $1M | 0.7% | 2025-Q4 stale |
| CLEAR STREET LLC added | 48,565 | $503K | 0.4% | 2025-Q2 stale |
| Tuttle Capital Management, LLC new | 40,000 | $404K | 0.3% | 2025-Q1 stale |
| Schonfeld Strategic Advisors LLC trimmed | 34,057 | $356K | 0.2% | 2025-Q4 stale |
| Virtu Financial LLC trimmed | 33,772 | $352K | 0.2% | 2025-Q4 stale |
| ABC ARBITRAGE SA new | 15,000 | $157K | 0.1% | 2025-Q4 stale |
| CSS LLC/IL trimmed | 170,835 | $46K | 0.0% | 2025-Q4 stale |
| COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS trimmed | 121,000 | $33K | 0.0% | 2025-Q4 stale |
| GRITSTONE ASSET MANAGEMENT LLC | 12,362 | $3K | 0.0% | 2025-Q4 stale |
| Farther Finance Advisors, LLC new | 2,000 | $540 | 0.0% | 2025-Q3 stale |
| BANK OF AMERICA CORP /DE/ new | 200 | $33 | 0.0% | 2025-Q1 stale |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | 0 | — | 0.0% | 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.
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.