Quidel Corporation
Ownership
Ownership Structure
Who owns Quidel Corporation (QDEL)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 89.2% of the shares are freely tradable; institutional investors hold 124.1%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 16.34 | 11,202,523 | +7.2 | 06/30/2026 |
| FMR Inc | 10.74 | 7,363,696 | +11.7 | 06/30/2026 |
| Newtyn Management LLC | 9.66 | 6,625,000 | +45.3 | 06/30/2026 |
| Vanguard Portfolio Management, LLC | 6.03 | 4,135,464 | +2.6 | 06/30/2026 |
| Neuberger Berman Group LLC | 5.15 | 3,534,619 | +131.0 | 06/30/2026 |
| Amvescap Plc. | 5.07 | 3,473,432 | +11.4 | 06/30/2026 |
| American Century Companies Inc | 4.82 | 3,307,079 | +15.8 | 06/30/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| iShares Core S&P Small-Cap ETF | 5.95 | 4,080,594 | +0.0 | 09/30/2026 |
| Fidelity Value | 5.55 | 3,806,300 | +0.0 | 08/31/2026 |
| Avantis US Small Cap Value ETF | 5.02 | 3,445,621 | +0.2 | 09/30/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| Siegrist Jonathan Philip | EVP of R&D & CTO | 25,381 | 365,486 $ | Oct 15, 2026 | direct |
| Hanson Bryan Michael | EVP Global Port. Mgmt & Mkting | 8,055 | 115,992 $ | Aug 15, 2026 | direct |
| Bowman Ronald Lee | Chief Human Resources Officer | 5,020 | 72,288 $ | Sep 15, 2026 | direct |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Oct 15, 2026 | Siegrist Jonathan Philip | EVP of R&D & CTO | Other | 6,695 | 13.91 | 93,127 |
| Oct 15, 2026 | Siegrist Jonathan Philip | EVP of R&D & CTO | Other | 18,657 | 0.00 | – |
| Sep 15, 2026 | Bowman Ronald Lee | Chief Human Resources Officer | Other | 921 | 10.63 | 9,790 |
| Sep 15, 2026 | Bowman Ronald Lee | Chief Human Resources Officer | Other | 2,566 | 0.00 | – |
| Aug 15, 2026 | Hanson Bryan Michael | EVP Global Port. Mgmt & Mkting | Other | 162 | 14.30 | 2,317 |
| Aug 15, 2026 | Hanson Bryan Michael | EVP Global Port. Mgmt & Mkting | Other | 446 | 0.00 | – |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: November 4, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.