Ownership history in VANGUARD GROUP INC · 37 quarters on record
This page tracks every 13F SEC filing in which VANGUARD GROUP INC reported a position in NANOPHASE TECHNOLOGIES CORP Com (SLSN). Data includes quarterly share count, position size as % of portfolio, estimated market value, and end-of-quarter stock price — sourced directly from SEC EDGAR 13F filings.
| Quarter | Action | Shares | Change | Chg % | % of Fund | Mkt Value | Price (EOQ) |
|---|---|---|---|---|---|---|---|
| 2025 Q4 | ADDED | 1,048,394 | +5,678 | +0.5% | 0.00% | $1.7M | $1.60 |
| 2025 Q3 | ADDED | 1,042,716 | +101,868 | +10.8% | 0.00% | $3.4M | $3.22 |
| 2025 Q2 | ADDED | 940,848 | +210,478 | +28.8% | 0.00% | $4.1M | $4.36 |
| 2011 Q4 | UNCHANGED | 730,370 | — | 0% | 0.00% | $293K | $0.41 |
| 2011 Q3 | ADDED | 730,370 | +1,682 | +0.2% | 0.00% | $497K | $0.69 |
| 2011 Q2 | ADDED | 728,688 | +52,809 | +7.8% | 0.00% | $874K | $1.21 |
| 2011 Q1 | ADDED | 675,879 | +3,700 | +0.6% | 0.00% | $967K | $1.42 |
| 2010 Q4 | ADDED | 672,179 | +15,952 | +2.4% | 0.00% | $793K | $1.21 |
| 2010 Q3 | ADDED | 656,227 | +33,100 | +5.3% | 0.00% | $669K | $1.02 |
| 2010 Q2 | ADDED | 623,127 | +8,800 | +1.4% | 0.00% | $723K | $1.16 |
As of 2025 Q4 — sorted by position size