32 institutions reported holding $1.3M of INTRUSION INC (INTZ) in SEC 13F filings for 2026-03-31. Largest institutional holders: Potomac Capital Management, Inc. ($381,920), GEODE CAPITAL MANAGEMENT, LLC ($281,184), VANGUARD CAPITAL MANAGEMENT LLC ($136,591), TRITONPOINT WEALTH, LLC ($130,385), STATE STREET CORP ($87,368). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | Potomac Capital Management, Inc. | $381,920 | 465,415 | Trimmed |
| 2 | GEODE CAPITAL MANAGEMENT, LLC | $281,184 | 342,609 | Added |
| 3 | VANGUARD CAPITAL MANAGEMENT LLC | $136,591 | 166,371 | New |
| 4 | TRITONPOINT WEALTH, LLC | $130,385 | 158,890 | Hold |
| 5 | STATE STREET CORP | $87,368 | 106,469 | Added |
| 6 | VANGUARD FIDUCIARY TRUST CO | $73,502 | 89,528 | New |
| 7 | UBS Group AG | $43,188 | 52,603 | Added |
| 8 | XTX Topco Ltd | $28,676 | 34,945 | Added |
| 9 | NORTHERN TRUST CORP | $28,148 | 34,302 | Hold |
| 10 | PROMETHIUM ADVISORS,LLC | $22,970 | 27,992 | Added |
| 11 | Cetera Investment Advisers | $14,842 | 18,087 | Hold |
| 12 | TWO SIGMA INVESTMENTS, LP | $11,064 | 13,483 | Trimmed |
| 13 | CITADEL ADVISORS LLC | $9,950 | 12,125 | Trimmed |
| 14 | TWO SIGMA SECURITIES, LLC | $9,587 | 11,683 | New |
| 15 | GSA CAPITAL PARTNERS LLP | $9,000 | 10,436 | Trimmed |
| 16 | IHT Wealth Management, LLC | $8,259 | 10,065 | Hold |
| 17 | BlackRock, Inc. | $8,186 | 9,976 | Trimmed |
| 18 | MORGAN STANLEY | $6,535 | 7,964 | Added |
| 19 | Tower Research Capital LLC (TRC) | $3,846 | 4,687 | New |
| 20 | Private Wealth Asset Management, LLC | $3,678 | 4,482 | Hold |
| 21 | OSAIC HOLDINGS, INC. | $1,681 | 2,050 | Trimmed |
| 22 | SBI Securities Co., Ltd. | $973 | 1,186 | Trimmed |
| 23 | Vanguard Global Advisers, LLC | $200 | 243 | New |
| 24 | VISION FINANCIAL MARKETS LLC | $11 | 13 | Hold |
| 25 | BNP PARIBAS FINANCIAL MARKETS | $7 | 9 | Hold |
Source: SEC Form 13F filings · as of 2026-03-31