QuidelOrtho (QDEL)
QuidelOrtho on one page: short interest, daily short volume, fails to deliver, planned sales, large holders, 13F holders, earnings dates and insider trades. Listed on Nasdaq, classified by the SEC as in vitro & in vivo diagnostic substances.
15.0M
Short interest
settlement 2026-09-30
11.0
Days to cover
+0.2 days vs prior
26.7%
Short share of volume
2026-10-12
5
Fails to deliver
settlement 2026-08-31
Wed 4 Nov
Next earnings
estimated date
$0
Insider flow, 90 days
0 buys, 0 sells
As of 2026-10-12.
Short interest
FINRA, twice a month. The newest 24 settlements in the table, 48 in the chart. JSONAs of 30 September 2026, short interest in QDEL is 14,953,442 shares, up 825,232 shares over the last month. Over the last 48 readings it ranged from 3,412,473 shares (31 January 2025) to 14,962,267 shares (14 August 2026). The latest reading sits at the top of that range. At the reported average volume of 1.4M shares a day that is 11.0 days to cover.
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| Settlement | Shares short | Change | Avg daily volume | Days to cover |
|---|---|---|---|---|
| 2026-09-30 | 14,953,442 | +5.4% | 1,362,233 | 10.98 |
| 2026-09-15 | 14,190,525 | +0.4% | 1,317,855 | 10.77 |
| 2026-08-31 | 14,128,210 | -5.6% | 1,344,900 | 10.51 |
| 2026-08-14 | 14,962,267 | +15.1% | 1,981,333 | 7.55 |
| 2026-07-31 | 13,005,131 | +10.2% | 1,022,227 | 12.72 |
| 2026-07-15 | 11,802,749 | +2.6% | 1,209,030 | 9.76 |
| 2026-06-30 | 11,505,504 | -6.9% | 2,152,143 | 5.35 |
| 2026-06-15 | 12,353,554 | +2.7% | 1,738,588 | 7.11 |
| 2026-05-29 | 12,029,248 | +2.0% | 1,763,805 | 6.82 |
| 2026-05-15 | 11,794,699 | -7.9% | 2,609,369 | 4.52 |
| 2026-04-30 | 12,811,515 | +9.9% | 3,579,924 | 3.58 |
| 2026-04-15 | 11,654,263 | -8.9% | 1,832,012 | 6.36 |
| 2026-03-31 | 12,791,328 | +16.3% | 2,155,062 | 5.94 |
| 2026-03-13 | 10,997,657 | +6.8% | 1,222,497 | 9.00 |
| 2026-02-27 | 10,302,587 | +1.2% | 1,177,313 | 8.75 |
| 2026-02-13 | 10,182,215 | -1.8% | 1,398,107 | 7.28 |
| 2026-01-30 | 10,371,307 | -1.4% | 1,158,973 | 8.95 |
| 2026-01-15 | 10,520,919 | -6.5% | 926,515 | 11.36 |
| 2025-12-31 | 11,249,168 | -0.7% | 680,713 | 16.53 |
| 2025-12-15 | 11,330,182 | -1.3% | 936,351 | 12.10 |
| 2025-11-28 | 11,475,641 | +3.8% | 1,273,853 | 9.01 |
| 2025-11-14 | 11,055,721 | +22.5% | 2,405,666 | 4.60 |
| 2025-10-31 | 9,024,719 | +7.5% | 1,094,114 | 8.25 |
| 2025-10-15 | 8,395,606 | -3.5% | 1,307,326 | 6.42 |
Daily short volume
FINRA Reg SHO, the last 30 sessions. JSONAs of 12 October 2026, the short share of QDEL volume is 26.7%, down 3.4 points over the last five sessions. Over the last 30 readings it ranged from 25.5% (7 October 2026) to 75.2% (1 September 2026). The latest reading sits at the bottom of that range. The latest reading is 16.7 points below the 30-session average of 43.5%, on 1.4M shares reported.
| Date | Short volume | Total volume | Short share | Exempt |
|---|---|---|---|---|
| 2026-10-12 | 383K | 1.4M | 26.7% | 0 |
| 2026-10-09 | 429K | 1.3M | 32.1% | 8,272 |
| 2026-10-08 | 296K | 1.1M | 27.0% | 0 |
| 2026-10-07 | 277K | 1.1M | 25.5% | 25 |
| 2026-10-06 | 445K | 1.4M | 31.6% | 47 |
| 2026-10-05 | 383K | 1.3M | 30.1% | 0 |
| 2026-10-02 | 301K | 1.2M | 25.5% | 94 |
| 2026-10-01 | 403K | 1.4M | 29.0% | 6,114 |
| 2026-09-30 | 242K | 514K | 47.0% | 1,212 |
| 2026-09-29 | 182K | 335K | 54.5% | 0 |
| 2026-09-28 | 72K | 210K | 34.5% | 0 |
| 2026-09-25 | 125K | 270K | 46.2% | 0 |
| 2026-09-24 | 237K | 558K | 42.4% | 400 |
| 2026-09-23 | 186K | 382K | 48.6% | 0 |
| 2026-09-22 | 184K | 359K | 51.1% | 138 |
| 2026-09-21 | 196K | 402K | 48.7% | 0 |
| 2026-09-18 | 347K | 675K | 51.4% | 400 |
| 2026-09-17 | 216K | 532K | 40.6% | 1,231 |
| 2026-09-16 | 272K | 668K | 40.8% | 7,800 |
| 2026-09-15 | 353K | 1.1M | 32.2% | 143 |
| 2026-09-14 | 427K | 1.2M | 35.1% | 12,433 |
| 2026-09-11 | 186K | 420K | 44.3% | 0 |
| 2026-09-10 | 215K | 413K | 52.1% | 0 |
| 2026-09-09 | 177K | 320K | 55.2% | 0 |
| 2026-09-08 | 218K | 359K | 60.6% | 126 |
| 2026-09-04 | 166K | 338K | 49.1% | 0 |
| 2026-09-03 | 155K | 273K | 56.6% | 1,739 |
| 2026-09-02 | 162K | 335K | 48.2% | 0 |
| 2026-09-01 | 239K | 317K | 75.2% | 22 |
| 2026-08-31 | 183K | 297K | 61.5% | 0 |
Fails to deliver
SEC, the last 30 settlement dates with a fail. JSONAs of 31 August 2026, the fails-to-deliver balance in QDEL is 5 shares, unchanged over the last settlement date. Over the last 30 readings it ranged from 5 shares (28 August 2026) to 102,112 shares (30 June 2026). The latest reading sits at the bottom of that range.
| Settlement | Shares failed | Price | Value |
|---|---|---|---|
| 2026-08-31 | 5 | $14.74 | $74 |
| 2026-08-28 | 5 | $15.32 | $77 |
| 2026-08-19 | 4,356 | $13.43 | $59K |
| 2026-08-18 | 6,156 | $14.58 | $90K |
| 2026-08-17 | 6,156 | $14.30 | $88K |
| 2026-08-12 | 2,171 | $13.99 | $30K |
| 2026-07-24 | 860 | $16.58 | $14K |
| 2026-07-22 | 33,051 | $16.43 | $543K |
| 2026-07-20 | 11,000 | $17.38 | $191K |
| 2026-07-17 | 106 | $18.24 | $2K |
| 2026-07-14 | 1,923 | $17.89 | $34K |
| 2026-07-10 | 51 | $17.44 | $889 |
| 2026-07-09 | 13,976 | $17.25 | $241K |
| 2026-07-08 | 10,176 | $17.00 | $173K |
| 2026-07-07 | 958 | $18.00 | $17K |
| 2026-07-06 | 583 | $18.25 | $11K |
| 2026-06-30 | 102,112 | $18.23 | $1.9M |
| 2026-06-29 | 39,463 | $13.79 | $544K |
| 2026-06-22 | 9,512 | $13.67 | $130K |
| 2026-06-15 | 342 | $14.13 | $5K |
| 2026-06-11 | 150 | $13.50 | $2K |
| 2026-06-10 | 1,684 | $13.94 | $23K |
| 2026-06-09 | 7,307 | $14.47 | $106K |
| 2026-06-08 | 6,795 | $14.33 | $97K |
| 2026-06-05 | 8,509 | $15.30 | $130K |
| 2026-06-04 | 80 | $13.60 | $1K |
| 2026-06-02 | 1,200 | $13.27 | $16K |
| 2026-06-01 | 1,684 | $13.02 | $22K |
| 2026-05-29 | 7,297 | $13.07 | $95K |
| 2026-05-28 | 6,242 | $12.33 | $77K |
Insider trades
SEC Form 4, newest first, 50 of 100 shown. JSONNo open-market insider trades were reported for QDEL in the last 90 days. The most recent filings are listed below. Latest filing: Bowman Ronald Lee (Chief Human Resources Officer) on 2026-09-15.
| Date | Insider | Title | Type | Shares | Price | Value | Owned after |
|---|---|---|---|---|---|---|---|
| 2026-09-15 | Bowman Ronald Lee | Chief Human Resources Officer | Tax withholding | 921 | $10.63 | $10K | 5K |
| 2026-09-15 | Bowman Ronald Lee | Chief Human Resources Officer | Option exercise | 3K | $0.00 | $0 | 6K |
| 2026-08-15 | Hanson Bryan Michael | EVP Global Port. Mgmt & Mkting | Tax withholding | 162 | $14.30 | $2K | 8K |
| 2026-08-15 | Hanson Bryan Michael | EVP Global Port. Mgmt & Mkting | Option exercise | 446 | $0.00 | $0 | 8K |
| 2026-07-01 | Hanson Bryan Michael | EVP Global Port. Mgmt & Mkting | Tax withholding | 2K | $18.18 | $38K | 8K |
| 2026-07-01 | Hanson Bryan Michael | EVP Global Port. Mgmt & Mkting | Option exercise | 6K | $0.00 | $0 | 10K |
| 2026-06-06 | WIDDER KENNETH J | Director | Grant | 273 | $0.00 | $0 | 45K |
| 2026-06-06 | WIDDER KENNETH J | Director | Grant | 910 | $0.00 | $0 | 45K |
| 2026-06-06 | POLAN MARY LAKE PH D | Director | Grant | 224 | $0.00 | $0 | 20K |
| 2026-06-06 | POLAN MARY LAKE PH D | Director | Grant | 749 | $0.00 | $0 | 20K |
| 2026-06-06 | Michael Edward L. | Director | Grant | 289 | $0.00 | $0 | 29K |
| 2026-06-06 | Michael Edward L. | Director | Grant | 963 | $0.00 | $0 | 29K |
| 2026-06-06 | BUECHLER KENNETH F | Director | Grant | 497 | $0.00 | $0 | 111K |
| 2026-06-06 | BUECHLER KENNETH F | Director | Grant | 2K | $0.00 | $0 | 110K |
| 2026-05-29 | Wilkins Joseph D Jr. | Director | Grant | 7K | $0.00 | $0 | 19K |
| 2026-05-29 | Strobeck Matthew | Director | Grant | 7K | $0.00 | $0 | 35K |
| 2026-05-29 | RHOADS ANN D | Director | Grant | 7K | $0.00 | $0 | 23K |
| 2026-05-29 | WIDDER KENNETH J | Director | Grant | 7K | $0.00 | $0 | 44K |
| 2026-05-29 | POLAN MARY LAKE PH D | Director | Grant | 7K | $0.00 | $0 | 19K |
| 2026-05-29 | Michael Edward L. | Director | Grant | 7K | $0.00 | $0 | 28K |
| 2026-05-29 | Huennekens R Scott | Director | Grant | 7K | $0.00 | $0 | 9K |
| 2026-05-29 | Dilsaver Evelyn S | Director | Grant | 7K | $0.00 | $0 | 17K |
| 2026-05-29 | Chiminski John R | Director | Grant | 7K | $0.00 | $0 | 9K |
| 2026-05-29 | BUECHLER KENNETH F | Director | Grant | 7K | $0.00 | $0 | 109K |
| 2026-05-22 | RHOADS ANN D | Director | Grant | 234 | $0.00 | $0 | 16K |
| 2026-05-22 | RHOADS ANN D | Director | Grant | 1K | $0.00 | $0 | 16K |
| 2026-05-15 | Blaser Brian J. | President and CEO | Tax withholding | 10K | $10.32 | $106K | 36K |
| 2026-05-15 | Blaser Brian J. | President and CEO | Grant | 21K | $0.00 | $0 | 46K |
| 2026-04-26 | McLellan Philip D. | Chief Operations Officer | Tax withholding | 699 | $11.59 | $8K | 22K |
| 2026-04-26 | McLellan Philip D. | Chief Operations Officer | Grant | 2K | $0.00 | $0 | 23K |
| 2026-04-26 | Hanson Bryan Michael | EVP Global Port. Mgmt & Mkting | Tax withholding | 528 | $11.59 | $6K | 4K |
| 2026-04-26 | Hanson Bryan Michael | EVP Global Port. Mgmt & Mkting | Grant | 1K | $0.00 | $0 | 5K |
| 2026-04-22 | McLellan Philip D. | Chief Operations Officer | Tax withholding | 1K | $11.90 | $14K | 21K |
| 2026-04-22 | McLellan Philip D. | Chief Operations Officer | Grant | 3K | $0.00 | $0 | 22K |
| 2026-04-22 | Hanson Bryan Michael | EVP Global Port. Mgmt & Mkting | Tax withholding | 1K | $11.90 | $15K | 3K |
| 2026-04-22 | Hanson Bryan Michael | EVP Global Port. Mgmt & Mkting | Grant | 4K | $0.00 | $0 | 4K |
| 2026-03-28 | Busky Joseph M. | Chief Financial Officer | Tax withholding | 2K | $14.78 | $22K | 45K |
| 2026-03-28 | Busky Joseph M. | Chief Financial Officer | Grant | 5K | $0.00 | $0 | 46K |
| 2026-02-13 | Busky Joseph M. | Chief Financial Officer | Buy | 3K | $23.66 | $80K | 10K |
| 2026-02-13 | Strobeck Matthew | Director | Buy | 10K | $23.96 | $240K | 28K |
| 2026-02-13 | Busky Joseph M. | Chief Financial Officer | Buy | 3K | $23.66 | $80K | 10K |
| 2026-02-13 | Blaser Brian J. | President and CEO | Buy | 11K | $23.59 | $249K | 40K |
| 2026-02-08 | Hodges Michelle A | Chief Legal Officer | Tax withholding | 1K | $29.10 | $33K | 42K |
| 2026-02-08 | Hodges Michelle A | Chief Legal Officer | Grant | 3K | $0.00 | $0 | 43K |
| 2026-02-08 | Busky Joseph M. | Chief Financial Officer | Tax withholding | 2K | $29.10 | $53K | 41K |
| 2026-02-08 | Busky Joseph M. | Chief Financial Officer | Grant | 6K | $0.00 | $0 | 43K |
| 2026-01-31 | McLellan Philip D. | Chief Operations Officer | Tax withholding | 228 | $27.17 | $6K | 19K |
| 2026-01-31 | McLellan Philip D. | Chief Operations Officer | Grant | 634 | $0.00 | $0 | 19K |
| 2026-01-31 | McLellan Philip D. | Chief Operations Officer | Tax withholding | 674 | $27.17 | $18K | 19K |
| 2026-01-31 | McLellan Philip D. | Chief Operations Officer | Grant | 2K | $0.00 | $0 | 19K |
Form 4 filings are due within two business days of the trade. Insiders sell for many reasons that say nothing about the company; open-market buys are rarer.
Planned sales (Form 144)
Newest first. JSON1 Form 144 notice on file for QDEL worth $112K at the prices reported; 0 in the last 90 days worth $0. Latest: KENNETH WIDDER filed on 2025-11-25 to sell 4,026 shares ($112K) from 2025-11-25.
| Filed | Seller | Shares | Market value | Of outstanding | Sale from | Broker |
|---|---|---|---|---|---|---|
| 2025-11-25 | KENNETH WIDDERDirector | 4K | $112K | 0.006% | 2025-11-25 | Morgan Stanley Smith Barney LLC Executive Financial Services |
Large holders (13D and 13G)
One row per reporting person with its latest filing, newest first. JSON9 holders report 5% or more of QDEL in their latest filing, all on Schedule 13G (passive). The largest reported stake is Newtyn Management, LLC at 9.7% of the class (6,625,000 shares), filed 2026-08-14 for an event on 2026-06-30.
| Filed | Form | Holder | Shares | Of class | Event |
|---|---|---|---|---|---|
| 2026-10-07 | 13G/Ano. 4 | Abigail P. Johnsonindividual | 4.0M | 5.8% | 2026-09-30 |
| 2026-10-07 | 13G/Ano. 4 | FMR LLCparent holding company | 4.0M | 5.8% | 2026-09-30 |
| 2026-08-14 | 13G/Ano. 6 | T. Rowe Price Investment Management, Inc.investment adviser | 1.7M | 2.6% | 2026-06-30 |
| 2026-08-14 | 13G/Ano. 2 | Newtyn Management, LLCinvestment adviser | 6.6M | 9.7% | 2026-06-30 |
| 2026-08-14 | 13G/Ano. 2 | Newtyn TE Partners, LPpartnership | 4.3M | 6.3% | 2026-06-30 |
| 2026-08-13 | 13G | Invesco Ltd.parent holding company, investment adviser | 3.5M | 5.1% | 2026-06-30 |
| 2026-08-05 | 13G/Ano. 1 | Neuberger Berman Group LLCparent holding company | 3.4M | 4.9% | 2026-07-31 |
| 2026-08-05 | 13G/Ano. 1 | Neuberger Berman Investment Advisers LLCinvestment adviser | 3.0M | 4.4% | 2026-07-31 |
| 2026-04-30 | 13G | Vanguard Capital Managementinvestment adviser | 3.6M | 5.2% | 2026-03-31 |
| 2026-04-29 | 13G | Vanguard Portfolio Managementinvestment adviser | 4.1M | 6.0% | 2026-03-31 |
| 2026-03-27 | 13G/Ano. 6 | The Vanguard Groupinvestment adviser | 0 | 0.0% | 2026-03-13 |
| 2026-02-13 | 13G/Ano. 3 | Rubric Capital Management LPinvestment adviser, partnership | 3.8M | 5.6% | 2025-12-31 |
| 2026-02-13 | 13G/Ano. 3 | David Rosenparent holding company, individual | 3.8M | 5.6% | 2025-12-31 |
13F holders
Tracked managers holding QDEL at their latest 13F. JSON5 of the 30 tracked managers held QDEL at their latest 13F, $34.2M in total at quarter-end prices. AQR Capital Management is the largest at $16.0M (0.0% of its portfolio) as of 2026-06-30. Over the prior quarter 3 added shares and 2 cut.
| Fund | Quarter | Shares | Value | Of portfolio | Change in shares |
|---|---|---|---|---|---|
| AQR Capital Management | 2026-06-30 | 911K | $16.0M | 0.01% | +736K |
| Millennium Management | 2026-06-30 | 722K | $12.7M | 0.00% | +440K |
| D. E. Shaw & Co. | 2026-06-30 | 270K | $4.7M | 0.00% | -4K |
| Point72 Asset Management | 2026-06-30 | 30K | $533K | 0.00% | -732K |
| Two Sigma Investments | 2026-06-30 | 17K | $305K | 0.00% | new |
Only the 30 tracked managers on the funds hub; a 13F reports long positions in US listed stock at quarter end, 45 days late, and says nothing about shorts or positions sold since.
What this page is
QuidelOrtho in the regulatory record
Regulators publish company data in separate files that never sit next to each other: FINRA's twice-monthly short interest, its daily short sale volume, the SEC's fails-to-deliver counts, and each insider's Form 4. A company page puts those series for one ticker on one URL, with planned sales, large holders, 13F holders and financials beside them, so the short position, the daily flow, the settlement fails and what insiders are doing can be read together.
Each section has its own history table, a one-line summary of the latest figures and its own JSON and CSV links, and says when its source last updated.
This page follows QuidelOrtho (QDEL), SEC CIK 1906324, listed on Nasdaq, classified by the SEC as in vitro & in vivo diagnostic substances. The cross-market tables live on the short interest and insider transactions hubs.
Source and updates
- Short interest
- FINRA consolidated short interestSource: FINRA.Twice a month, about eight business days after settlement. Latest 2026-09-30.JSON and CSV
- Daily short volume
- FINRA Reg SHO daily filesSource: FINRA.Every trading day, the morning after FINRA posts it. Latest 2026-10-12.JSON and CSV
- Fails to deliver
- SEC fails-to-deliver dataSource: SEC.Twice a month, a few weeks after the half month ends. Latest 2026-08-31.JSON and CSV
- Planned sales
- SEC EDGAR Form 144Source: SEC.New notices appear shortly after the SEC posts them; a notice is filed on or before the sale. Latest 2025-11-25.JSON and CSV
- Large holders
- SEC EDGAR Schedule 13D and 13GSource: SEC.New filings appear shortly after the SEC posts them. A 13D is due within five business days of crossing 5%; a 13G follows the passive schedule. Latest 2026-10-07.JSON and CSV
- 13F holders
- SEC EDGAR Form 13F-HRSource: SEC.Quarterly, filed within 45 days of quarter end; 30 tracked managers. Latest 2026-06-30.JSON and CSV
- Earnings dates
- SEC EDGAR 8-K filings (Item 2.02)Source: SEC.Twice a day. Reported dates come from the company's 8-K filings; the next date is marked as an estimate until the 8-K arrives. Latest 2026-08-06.JSON and CSV
- Insider trades
- SEC EDGAR Form 4Source: SEC.New filings appear shortly after the SEC posts them; they're due two business days after the trade. Latest 2026-09-15.JSON and CSV
- Company record
- EDGAR filing index for CIK 1906324Ticker, name and exchange from the SEC's company list, refreshed weekly.
- Rate limits
- 10 requests a minute without a key, 30 with a free key from a free account.
How to read it
- Read the position against the flow: rising short interest with a high daily short share is new shorting; rising short interest with a normal short share is old shorts holding on.
- Insider buys next to a large short position are rare and stand out; insider sells next to one are common and mean little.
- Fails to deliver matter relative to the float, not in absolute shares; a million failed shares in a mega cap is noise.
Analysis of what the data shows, not advice. XOOMAR does not recommend buying, selling or holding anything.
Other companies the SEC classifies as in vitro & in vivo diagnostic substances
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Datasets
Frequently Asked Questions
How much of QDEL is sold short?
What is QDEL's daily short volume?
Does QDEL have fails to deliver?
Are QDEL insiders buying or selling?
Have QDEL insiders filed to sell?
Who owns 5% or more of QDEL?
Which tracked 13F managers own QDEL?
Data on this page is provided for informational purposes only and is not financial advice. See our editorial policy.