Among active 13F managers last quarter, 1 added and 1 reduced; the largest holder to move was Citadel Advisors LLC (+350%). No open-market insider trades in the last 180 days.
No leg leans either way.
8 tracked 13F filers disclose a position in MYSZ as of the latest SEC 13F filings, a combined $74K 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 | Citadel Advisors LLC | 87K | $39K | ▲+350% Added · +68K sh | Q2 2026 | |
| 2 | Williams & Novak Wealth Management, LLC | 28K | $13K | ▲+3.6% Added · +975 sh | Q2 2026 | |
| 3 | XTX Topco Ltd | 20K | $11K | ▼−3.4% Reduced · −689 sh | Q1 2026 | |
| 4 | Susquehanna International Group, LLP | 13K | $8K | ▲+9.0% Added · +1K sh | Q1 2026 | |
| 5 | UBS Group AG | 4K | $3K | ▲+108% Added · +2K sh | Q1 2026 | |
| 6 | Morgan Stanley | 509 | $294 | —Held | Q1 2026 | |
| 7 | SBI Securities Co., Ltd. | 25 | $11 | —Held | Q2 2026 | |
| 8 | Johnson Financial Group, Inc. | 1 | $1 | —Held | 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, 1 fund added to an existing position in MYSZ, while 1 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 | 4 funds | $2.9B |
| Amazon.com IncAMZN | 4 funds | $2.7B |
| Apple IncAAPL | 4 funds | $2.3B |
| Microsoft CorpMSFT | 4 funds | $1.5B |
| Electronic Arts IncEA | 4 funds | $1.2B |
| Warner Bros Discovery IncWBD | 4 funds | $1.2B |
| Alphabet Inc-CL AGOOGL | 4 funds | $1.2B |
| Eli Lilly & CoLLY | 4 funds | $1.2B |
| Broadcom IncAVGO | 4 funds | $1.1B |
| Alphabet Inc-CL CGOOG | 4 funds | $1000.0M |
| Advanced Micro DevicesAMD | 4 funds | $974.5M |
| Abbvie IncABBV | 4 funds | $827.4M |
Ranked by how many of MYSZ's tracked holders also hold each name. The last column is those co-holders' combined reported position in that name, not in MYSZ.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| Dec 29, 2025 | Luzon Ronen | Chief Executive Officer, Director | Buy (P) | 4K | $3K |
| Dec 1, 2025 | Luzon Ronen | Chief Executive Officer, Director | Buy (P) | 3K | $2K |
| Nov 25, 2025 | Luzon Ronen | Chief Executive Officer, Director | Buy (P) | 14K | $13K |
| Nov 24, 2025 | Luzon Ronen | Chief Executive Officer, Director | Buy (P) | 235 | $209 |
| Nov 20, 2025 | Luzon Ronen | Chief Executive Officer, Director | Buy (P) 2 lots, same day | 14K | $10K |
| Dec 30, 2024 | Avatar Securities, Llc | 10% Owner | Sell (S) 2 lots, same day | 121K | $585K |
| Dec 30, 2024 | Pardo Billy | CPO & COO | Sell (S) 4 lots, same day | 8K | $41K |
| Dec 30, 2024 | Kles Or | Chief Financial Officer | Sell (S) | 2K | $11K |
| Dec 30, 2024 | Luzon Ronen | Chief Executive Officer, Director | Sell (S) 4 lots, same day | 8K | $41K |
| Nov 29, 2023 | Luzon Ronen | Chief Executive Officer, Director | Sell (S) | 5K | $3K |
| Sep 6, 2023 | Turchinsky Ilia | Insider | Sell (S) | 1K | $2K |
| Aug 24, 2023 | Turchinsky Ilia | Insider | Sell (S) | 2K | $5K |
One row per insider, day and transaction code; shares and value are summed across the lots. Every lot is on the full insider page and in the filing.
Where institutional funds (13F), corporate insiders (Form 4) and US House members (STOCK Act) are buying or selling the same name in the same window. Green is buying, red is selling.
Insiders and Congress: last 180 days. Funds: latest 13F, top 100 holders incl. passive
| Source | Buying | Selling | Net |
|---|---|---|---|
13F funds Top 100 holders by value, passive included; the hero counts active managers only | 4 | 1 | – |
Insiders Form 4 open-market | 0 | 0 | $0 |
US House STOCK Act trades | 0 | 0 | $0 |
Capital Rotation reports where institutional capital disclosed rotating, as of the latest public SEC 13F filings. It is data, not investment advice, a recommendation, or a prediction. Filings lag about 45 days and cover long US equity positions only. Past disclosed flows do not indicate future prices. Do your own research; consult a licensed advisor.
Connected entities for MYSZ
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/MYSZ/capital-change-brief"
Use Arkolith's capital_change_brief for MYSZ. 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 MYSZ. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes.