21 tracked 13F filers disclose a position in QUMSR as of the latest SEC 13F filings, a combined $1.2M in reported value. Holders and values reflect the 13F filers Arkolith currently tracks, not the entire institutional universe. Counts and totals are a floor, not the full institutional ownership.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | Harraden Circle Investments, LLC | $198K | 994K | —Held | Q2 2026 | |
| 2 | TORONTO DOMINION BANK | $168K | 671K | ▼−3.5% Reduced · −24K sh | Q1 2026 | |
| 3 | Shaolin Capital Management LLC | $95K | 479K | ▲+4.2% Added · +19K sh | Q2 2026 | |
| 4 | RIVERNORTH CAPITAL MANAGEMENT, LLC | $106K | 425K | —Held | Q1 2026 | |
| 5 | Polar Asset Management Partners Inc. | $100K | 400K | ▲New +400K sh | Q1 2026 | |
| 6 | LINDEN ADVISORS LP | $90K | 400K | —Held | Q1 2026 | |
| 7 | AQR Arbitrage LLC | $80K | 321K | ▼−0.5% Reduced · −2K sh | Q1 2026 | |
| 8 | HIGHBRIDGE CAPITAL MANAGEMENT LLC | $52K | 307K | ▼−55% Reduced · −383K sh | Q2 2026 | |
| 9 | HGC Investment Management Inc. | $60K | 300K | —Held | Q2 2026 | |
| 10 | Clear Street Group Inc. | $44K | 222K | ▼−0.9% Reduced · −2K sh | Q2 2026 | |
| 11 | Cable Car Capital, LP | $35K | 175K | —Held | Q2 2026 | |
| 12 | Hudson Bay Capital Management LP | $38K | 150K | —Held | Q1 2026 | |
| 13 | Radcliffe Capital Management, L.P. | $33K | 150K | —Held | Q1 2026 | |
| 14 | D. E. Shaw & Co., Inc. | $31K | 125K | —Held | Q1 2026 | |
| 15 | PERISCOPE CAPITAL INC. | $20K | 125K | —Held | Q2 2026 | |
| 16 | HEIGHTS CAPITAL MANAGEMENT, INC | $21K | 107K | ▼−23% Reduced · −31K sh | Q2 2026 | |
| 17 | BNP PARIBAS FINANCIAL MARKETS | $23K | 102K | —Held | Q1 2026 | |
| 18 | BOOTHBAY FUND MANAGEMENT, LLC | $25K | 100K | —Held | Q1 2026 | |
| 19 | Schonfeld Strategic Advisors LLC | $9K | 54K | ▼−0.6% Reduced · −300 sh | Q2 2026 | |
| 20 | BERKLEY W R CORP | $8K | 35K | —Held | Q1 2026 | |
| 21 | UBS Group AG | $3K | 16K | ▼−0.5% Reduced · −77 sh | Q1 2026 |
Holders and values reflect the 13F filers Arkolith currently tracks, not the entire institutional universe. Counts and totals are a floor, not the full institutional ownership.
Last quarter, 1 fund opened a new position in QUMSR and 1 added to an existing one, while 4 reduced and 0 exited entirely — based on 13F filings from active, signal-eligible managers (passive index funds and other mechanical holders are excluded from this count).
| Company | Co-held by | Combined value |
|---|---|---|
| CANTOR EQUITY PARTNERS-CL ACEPF | 16 funds | $114.3M |
| GSR IV ACQUISITION CORP-CL AGSRF | 15 funds | $84.7M |
| D. BORAL ACQUISITION I-CL ADBCA | 15 funds | $78.6M |
| SOULPOWER ACQUISITION CO-ASOUL | 15 funds | $74.7M |
| CSLM DIGITAL ASSET ACQU - AKOYN | 15 funds | $59.6M |
| HALL CHADWICK ACQUISITION-AHCAC | 15 funds | $45.7M |
| CANTOR EQUITY PARTNERS VI -ACEPS | 15 funds | $23.7M |
| D. BORAL ACQUISITION I CORPDBCAW | 15 funds | $3.2M |
| KOCHAV DEFENSE ACQUISITION-RKCHVR | 15 funds | $2.7M |
| THAYER VENTURES ACQUISITIONTVAIR | 15 funds | $1.5M |
| DRUGS MADE IN AMERICA ACQ-RTDMIIR | 15 funds | $868K |
| JACKSON ACQUISITION CO-CL AJACS | 14 funds | $101.7M |
Ranked by how many of QUMSR's institutional holders also hold each name, a cross-fund conviction signal.
No open-market insider transactions on file yet. Grants, gifts, and exercises live on the full insider page.
| Class | 13F holders | Value held |
|---|---|---|
| QUMSORD SHS | 24 funds | $56.8M |
| QUMSRthis pageSPACS | 21 funds | $1.2M |
| QUMSUUNIT 07/30/2030 | 6 funds | $2.6M |
Same issuer, multiple share classes. The consensus leaderboards count this company once across all classes; this is the per-class detail.
No filings captured for this ticker in the live stream yet.
Connected entities for QUMSR
This stock page is the public Follow view. For one current, evidence-backed answer, use capital_change_brief through REST or MCP. It compares tracked 13F changes with qualifying Form 4 activity and cites the SEC evidence.
curl -H "Authorization: Bearer YOUR_API_KEY" \ "https://arkolith.com/api/v1/stocks/QUMSR/capital-change-brief"
Use Arkolith's capital_change_brief for QUMSR. Tell me what changed, whether insider activity corroborates it, and cite the SEC evidence.
13F holdings + Form 4 insider transactions + end-of-day price history + the live filing stream, joined for QUMSR. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes.