SMTK Simtek Corp.
Simtek Corp. (SMTK) Institutional Ownership
What the institutions did with SMTK last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
Sign in or subscribeLargest holders
| Manager | Shares | % of reported |
|---|---|---|
| JANE STREET GROUP, LLC | 524.0K | 35.1% |
| PEAK6 LLC | 339.1K | 22.7% |
| Rossby Financial, LCC | 296.0K | 19.8% |
| CITADEL ADVISORS LLC | 173.1K | 11.6% |
| Virtu Financial LLC | 86.9K | 5.8% |
| GEODE CAPITAL MANAGEMENT, LLC | 43.7K | 2.9% |
| PFG Investments, LLC | 16.0K | 1.1% |
| XTX Topco Ltd | 14.5K | 1.0% |
| Rockefeller Capital Management L.P. | 1.0K | 0.1% |
| Arax Advisory Partners | 145 | 0.0% |
| UBS Group AG | 84 | 0.0% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| AIGH Capital Management LLC | Sold Out | 895.4K | 0 | -895.4K |
| JANE STREET GROUP, LLC | New | 0 | 524.0K | +524.0K |
| PEAK6 LLC | New | 0 | 339.1K | +339.1K |
| CITADEL ADVISORS LLC | Increased | 22.4K | 173.1K | +150.7K |
| Rossby Financial, LCC | Increased | 236.0K | 296.0K | +60.0K |
| Financial Plan, Inc. | Sold Out | 60.0K | 0 | -60.0K |
| Virtu Financial LLC | Increased | 26.9K | 86.9K | +60.0K |
| GEODE CAPITAL MANAGEMENT, LLC | New | 0 | 43.7K | +43.7K |
| HRT FINANCIAL LP | Sold Out | 39.5K | 0 | -39.5K |
| Portfolio Strategies, Inc. | Sold Out | 15.1K | 0 | -15.1K |
| TWO SIGMA SECURITIES, LLC | Sold Out | 13.3K | 0 | -13.3K |
| PFG Investments, LLC | Reduced | 26.5K | 16.0K | -10.5K |
| XTX Topco Ltd | Reduced | 23.8K | 14.5K | -9.3K |
| Rockefeller Capital Management L.P. | New | 0 | 1.0K | +1.0K |
| Arax Advisory Partners | New | 0 | 145 | +145 |
| UBS Group AG | New | 0 | 84 | +84 |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.