Among active 13F managers last quarter, 2 opened and 1 added, while 3 reduced; the largest holder to move was StoneX Group Inc. (+192%).
13 tracked 13F filers disclose a position in MSTZ as of the latest SEC 13F filings, a combined $7.9M 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 | Shares | Position value | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | StoneX Group Inc. | 170K | $1.8M | ▲+192% Added · +112K sh | Q2 2026 | |
| 2 | Susquehanna International Group, LLP | 137K | $1.7M | ▼−35% Reduced · −72K sh | Q1 2026 | |
| 3 | XTX Topco Ltd | 117K | $1.5M | ▲New +117K sh | Q1 2026 | |
| 4 | Group One Trading LLC | 52K | $814K | ▲New +52K sh | Q2 2026 | |
| 5 | Two Sigma Securities, LLC | 35K | $538K | ▼−19% Reduced · −8K sh | Q2 2026 | |
| 6 | GTS Securities LLC | 32K | $404K | ▲New +32K sh | Q1 2026 | |
| 7 | IMC-Chicago, LLC | 26K | $320K | ▲+13% Added · +3K sh | Q1 2026 | |
| 8 | Jump Financial, LLC | 24K | $298K | ▼−38% Reduced · −15K sh | Q1 2026 | |
| 9 | Jane Street Group, LLC | 20K | $244K | ▼−79% Reduced · −74K sh | Q1 2026 | |
| 10 | Optiver Holding B.V. | 17K | $209K | ▼−22% Reduced · −5K sh | Q1 2026 | |
| 11 | Geneos Wealth Management Inc. | 5K | $78K | ▲New +5K sh | Q2 2026 | |
| 12 | Simplex Trading, LLC | 3K | $38K | ▲New +3K sh | Q1 2026 | |
| 13 | SBI Securities Co., Ltd. | 1K | $18K | ▼−91% Reduced · −12K sh | Q2 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, 2 funds opened a new position in MSTZ and 1 added to an existing one, while 3 reduced. 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 | Their position there |
|---|---|---|
| Nvidia CorpNVDA | 6 funds | $621.9M |
| Microsoft CorpMSFT | 6 funds | $219.1M |
| Direx Dail Semi Bu 3X Et-UsdSOXL | 6 funds | $213.3M |
| Micron Technology IncMU | 6 funds | $191.6M |
| SS SPDR S&P 500 ETF Trust-USSPY | 6 funds | $181.7M |
| Alphabet Inc-CL AGOOGL | 6 funds | $166.8M |
| SS Consumer Disc Select SectXLY | 6 funds | $108.5M |
| Broadcom IncAVGO | 6 funds | $106.3M |
| Palantir Technologies Inc-APLTR | 6 funds | $106.2M |
| SS Energy Select SectorXLE | 6 funds | $106.1M |
| Advanced Micro DevicesAMD | 6 funds | $98.8M |
| Meta Platforms Inc-Class AMETA | 6 funds | $90.3M |
Ranked by how many of MSTZ's tracked holders also hold each name. The last column is those co-holders' combined reported position in that name, not in MSTZ.
| Class | 13F holders | Value held |
|---|---|---|
| ACVFmc | 56 funds | $39.7M |
| VSLUMF Closed and MF Open | 50 funds | $449.4M |
| FEPImc | 47 funds | $30.8M |
| MSTUT-REX 2X LONG MS | 38 funds | $14.2M |
| TSPYTAPPALPHA SPY GR | 29 funds | $40.5M |
| AIPIREX AI EQUITY PR | 23 funds | $6.3M |
| XRPRREX OSPREY XRP | 22 funds | $4.8M |
| DYFIIDX DYNAMIC FIXE | 19 funds | $58.5M |
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 MSTZ
This ETF 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/MSTZ/capital-change-brief"
Use Arkolith's capital_change_brief for MSTZ. Tell me what changed, whether insider activity corroborates it, and cite the SEC evidence.
13F holdings + quarter-over-quarter ownership changes + end-of-day price history + the live filing stream, joined for MSTZ. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes.