145 tracked 13F filers disclose a position in QSI as of the latest SEC 13F filings, a combined $45.9M 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 | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | $10.4M | 13.4M | ▲+2.8% Added · +361K sh | Q1 2026 | |
| 2 | VANGUARD CAPITAL MANAGEMENT LLC | $5.4M | 7.0M | →First observed position No prior filed position | Q1 2026 | |
| 3 | ARK Investment Management LLC | $5.3M | 6.9M | ▼−2.0% Reduced · −143K sh | Q1 2026 | |
| 4 | Amova Asset Management Americas, Inc. | $3.4M | 4.4M | ▼−6.4% Reduced · −299K sh | Q1 2026 | |
| 5 | Sumitomo Mitsui Trust Group, Inc. | $3.4M | 4.4M | ▼−6.4% Reduced · −299K sh | Q1 2026 | |
| 6 | AQR CAPITAL MANAGEMENT LLC | $1.9M | 2.4M | ▲28× Added · +2.3M sh | Q1 2026 | |
| 7 | GEODE CAPITAL MANAGEMENT, LLC | $2.0M | 2.2M | ▼−42% Reduced · −1.6M sh | Q2 2026 | |
| 8 | UBS Group AG | $1.3M | 1.7M | ▲+17% Added · +253K sh | Q1 2026 | |
| 9 | VANGUARD PORTFOLIO MANAGEMENT LLC | $1.2M | 1.5M | →First observed position No prior filed position | Q1 2026 | |
| 10 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | $1.1M | 1.5M | ▼−37% Reduced · −863K sh | Q1 2026 | |
| 11 | NORTHERN TRUST CORP | $976K | 1.3M | ▼−43% Reduced · −947K sh | Q1 2026 | |
| 12 | VANGUARD FIDUCIARY TRUST CO | $865K | 1.1M | →First observed position No prior filed position | Q1 2026 | |
| 13 | STATE STREET CORP | $788K | 891K | ▼−76% Reduced · −2.9M sh | Q2 2026 | |
| 14 | Fosun International Ltd | $658K | 744K | —Held | Q2 2026 | |
| 15 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $354K | 458K | ▼−2.3% Reduced · −11K sh | Q1 2026 | |
| 16 | Nuveen, LLC | $349K | 451K | ▲+0.8% Added · +4K sh | Q1 2026 | |
| 17 | GOLDMAN SACHS GROUP INC | $344K | 444K | ▲+15% Added · +57K sh | Q1 2026 | |
| 18 | XTX Topco Ltd | $301K | 389K | ▼−16% Reduced · −73K sh | Q1 2026 | |
| 19 | Bank of New York Mellon Corp | $297K | 383K | ▼−5.7% Reduced · −23K sh | Q1 2026 | |
| 20 | IEQ CAPITAL, LLC | $310K | 351K | ▼−1.9% Reduced · −7K sh | Q2 2026 | |
| 21 | Aster Capital Management | $305K | 345K | ▲New +345K sh | Q2 2026 | |
| 22 | DEERFIELD MANAGEMENT COMPANY, L.P. | Withheld | 333K | —Held | Q1 2026 | |
| 23 | IQ EQ FUND MANAGEMENT | $284K | 321K | ▲+9.9% Added · +29K sh | Q2 2026 | |
| 24 | Knollwood Investment Advisory, LLC | $266K | 300K | —Held | Q2 2026 | |
| 25 | GROUP ONE TRADING LLC | $220K | 284K | ▲+16% Added · +38K 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, 10 funds opened a new position in QSI and 13 added to an existing one, while 13 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 |
|---|---|---|
| NVIDIA CORPNVDA | 71 funds | $146.0B |
| MICROSOFT CORPMSFT | 69 funds | $97.2B |
| AMAZON.COM INCAMZN | 69 funds | $69.8B |
| META PLATFORMS INC-CLASS AMETA | 68 funds | $43.4B |
| APPLE INCAAPL | 67 funds | $111.5B |
| BROADCOM INCAVGO | 67 funds | $60.0B |
| ALPHABET INC-CL AGOOGL | 67 funds | $52.1B |
| TESLA INCTSLA | 67 funds | $25.0B |
| VISA INC-CLASS A SHARESV | 66 funds | $25.7B |
| ALPHABET INC-CL CGOOG | 65 funds | $50.3B |
| COSTCO WHOLESALE CORPCOST | 65 funds | $13.2B |
| ADVANCED MICRO DEVICESAMD | 65 funds | $12.9B |
Ranked by how many of QSI's institutional holders also hold each name, a cross-fund conviction signal.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| Jun 23, 2026 | Hawkins Jeffrey Alan | President & CEO, Director | Sell (S) | 11K | $10K |
| Jun 23, 2026 | Keyes Jeffry R. | Chief Financial Officer | Sell (S) | 4K | $4K |
| Jun 23, 2026 | Vieceli John S. | Chief Product Officer | Sell (S) | 15K | $14K |
| Jun 23, 2026 | LaPointe Christian | GC & Corp. Secretary | Sell (S) | 8K | $7K |
| Jun 22, 2026 | Hawkins Jeffrey Alan | President & CEO, Director | Sell (S) | 11K | $11K |
| Jun 22, 2026 | Keyes Jeffry R. | Chief Financial Officer | Sell (S) | 4K | $4K |
| Jun 22, 2026 | Vieceli John S. | Chief Product Officer | Sell (S) | 15K | $14K |
| Jun 22, 2026 | LaPointe Christian | GC & Corp. Secretary | Sell (S) | 8K | $7K |
| Apr 21, 2026 | Keyes Jeffry R. | Chief Financial Officer | Sell (S) | 37K | $37K |
| Apr 21, 2026 | Hawkins Jeffrey Alan | President & CEO, Director | Sell (S) | 84K | $83K |
| Apr 20, 2026 | Keyes Jeffry R. | Chief Financial Officer | Sell (S) | 37K | $38K |
| Apr 20, 2026 | Hawkins Jeffrey Alan | President & CEO, Director | Sell (S) | 84K | $84K |
| Class | 13F holders | Value held |
|---|---|---|
| QSIthis pagecs | 144 funds | $45.9M |
| QSIthis pageWarrant | 5 funds | $48K |
| 74765K905CALL | 1 funds | $4K |
Same issuer, multiple share classes. The consensus leaderboards count this company once across all classes; this is the per-class detail.
Connected entities for QSI
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/QSI/capital-change-brief"
Use Arkolith's capital_change_brief for QSI. 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 QSI. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes.