No active 13F manager changed its position in ZSTK last quarter. Over the last 180 days, 1 insider bought and 1 insider sold, a net +$3.5M in open-market trades.
The legs disagree, or only one of them leans.
8 tracked 13F filers disclose a position in ZSTK as of the latest SEC 13F filings, a combined $183K 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 | Vanguard Capital Management LLC | 25K | $76K | —Held | Q2 2026 | |
| 2 | Geode Capital Management, LLC | 21K | $63K | ▼−17% Reduced · −4K sh | Q2 2026 | |
| 3 | Vanguard Fiduciary Trust Co | 13K | $38K | —Held | Q2 2026 | |
| 4 | UBS Group AG | 666 | $4K | ▲New +666 sh | Q1 2026 | |
| 5 | Morgan Stanley | 173 | $1K | ▲New +173 sh | Q1 2026 | |
| 6 | Osaic Holdings, Inc. | 12 | $73 | ▲New +12 sh | Q1 2026 | |
| 7 | Royal Bank Of Canada | 12 | $0 | ▲New +12 sh | Q1 2026 | |
| 8 | Key FInancial Inc | 1 | $3 | —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.
| Company | Co-held by | Their position there |
|---|---|---|
| Apple IncAAPL | 1 funds | $29.7M |
| Wisdomtree TR DVLP Intnl-UsdDOL | 1 funds | $22.8M |
| Wisdmtree GB Ex-US QL GR-UsdDNL | 1 funds | $20.9M |
| Wisdomtree US Smallcap FundEES | 1 funds | $19.9M |
| SS SPDR S&P 600 SC Val ETFSLYV | 1 funds | $19.7M |
| Ishares US Treasury Bond ETFGOVT | 1 funds | $19.6M |
| FT Vest Lad Buffervetf-Usd IBUFR | 1 funds | $14.7M |
| Ishares Msci Eafe Growth ETFEFG | 1 funds | $12.5M |
| Microsoft CorpMSFT | 1 funds | $10.8M |
| FT International Dev Cap STRFICS | 1 funds | $10.4M |
| ExxonMobil Holdings CorpXOM | 1 funds | $9.9M |
| SS SPDR S&P 600 SC GR ETFSLYG | 1 funds | $9.6M |
Ranked by how many of ZSTK's tracked holders also hold each name. The last column is those co-holders' combined reported position in that name, not in ZSTK.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| Aug 19, 2026 | Rong Rudy | President | Sell (S) | 1K | $8K |
| Jul 20, 2026 | Heinrich Michael | Executive Chairman, Director | Buy (P) | 4.6M | $3.5M |
| Sep 13, 2024 | Starke Clifford | CEO, Director | Buy (P) | 7K | $6K |
| Sep 6, 2024 | Wolkin Harold | Director | Buy (P) 3 lots, same day | 25K | $24K |
| Sep 5, 2024 | Starke Clifford | CEO, Director | Buy (P) | 51 | $48 |
| Apr 8, 2024 | Starke Clifford | CEO, Director | Buy (P) | 526K | $1000K |
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 | 0 | 1 | – |
Insiders Form 4 open-market | 1 | 1 | +$3.5M |
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 ZSTK
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/ZSTK/capital-change-brief"
Use Arkolith's capital_change_brief for ZSTK. 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 ZSTK. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes.