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Eton Pharmaceuticals Reports Fourth Quarter and Full Year 2023 Financial Results

  • Q4 2023 revenue of $7.3 million, representing a 109% increase from Q4 2022, marking the twelfth consecutive quarter of sequential product sales growth
  • Full year 2023 revenues reached $31.6 million with product sales and royalty revenues of $26.1 million, a 132% increase from 2022
  • Announced successful results from ET-400’s pivotal bioequivalence study, NDA submission planned for Q2 2024
  • Management to hold conference call today at 4:30pm ET

DEER PARK, Ill., March 14, 2024 (GLOBE NEWSWIRE) -- Eton Pharmaceuticals, Inc (“Eton” or the “Company”) (Nasdaq: ETON), an innovative pharmaceutical company focused on developing and commercializing treatments for rare diseases, today reported financial results for the quarter and year ended December 31, 2023.

“We finished 2023 by delivering our twelfth straight quarter of sequential product sales growth and another quarter of positive operating cash flow. The growth trajectory continues for ALKINDI SPRINKLE® and Carglumic Acid, and we are excited for the Company’s prospects for 2024 and beyond,” said Sean Brynjelsen, CEO of Eton Pharmaceuticals.

“In addition to the strong performance of our commercial products, we are pleased to report favorable developments in our pipeline. In recent weeks, we received positive study results for both ET-400 and ET-600, which brings both products one step closer to NDA submission. We look forward to submitting our NDA for ET-400 in the second quarter of this year and ET-600 early next year,” concluded Brynjelsen.  

Fourth Quarter and Recent Business Highlights

Twelfth straight quarter of sequential growth in product sales. Eton reported fourth quarter 2023 product sales and royalty revenue of $7.3 million, representing a 109% year-over-year increase and 4% growth over the third quarter of 2023, driven primarily by the ongoing momentum of ALKINDI SPRINKLE and Carglumic Acid. The Company anticipates continued growth of product sales in 2024.

Recorded positive cash flow from operations. Eton generated $0.4 million of operating cash during the fourth quarter of 2023, with total cash and cash equivalents of $21.4 million as of December 31, 2023.

Passed pivotal bioequivalence study for ET-400. In February, Eton received preliminary data showing that ET-400, its proprietary formulation of oral hydrocortisone, passed its pivotal bioequivalence study. All other major filing pre-requisites have been completed, and the Company expects to submit the NDA to the FDA for ET-400 when the final clinical study report is available in the second quarter of 2024. This would allow for a potential FDA approval as early as the first quarter of 2025.

Awarded U.S. patent for ET-400. The patent, which covers the Company’s proprietary formulation, expires in 2043 and is expected to be listed in the FDA’s Orange Book upon the product’s approval. The Company has additional patent applications related to the product under review with the United States Patent and Trademark Office.

Passed pilot bioequivalence study for ET-600. The Company plans to run the pivotal study in the second half of 2024, which would allow for a potential NDA submission in early 2025.

Initiated ALKINDI SPRINKLE sampling program. The Company’s sampling program went live in February 2024, allowing pediatric endocrinology offices to stock ALKINDI SPRINKLE samples so that newly diagnosed or converting patients can immediately start therapy on ALKINDI SPRINKLE in the presence of their physician. Eton has already seen strong demand for samples from physicians and expects the sampling program to have a positive impact on adoption and 2024 revenue growth.

Launched ultra-rare disease product Nitisinone capsules. The product was launched in February 2024 with full patient and provider support services. Eton believes its commercial advantages, existing relationships with prescribers, and experienced sales force will allow the Company to capture a meaningful percentage of the $50 million market.

Fourth Quarter Financial Results

Net Revenue: Net product sales and royalty revenues for the fourth quarter of 2023 increased by 109% to $7.3 million compared to $3.5 million in the prior year period, driven primarily by growth in ALKINDI SPRINKLE and Carglumic Acid. Total net revenues were $7.3 million for the fourth quarter of 2023, compared to $8.5 million for the fourth quarter of 2022. The prior year period included $5.0 million in licensing revenue resulting from a milestone payment received from Azurity Pharmaceuticals.

Gross Profit: Gross profit for the fourth quarter of 2023 was $3.6 million. Fourth quarter 2023 gross profit was negatively impacted by a $1.0 million one-time payment to Diurnal PLC as a result of ALKINDI SPRINKLE net sales triggering a commercial success-based milestone under terms of the product’s licensing agreement. Gross profit for the fourth quarter of 2022 was $6.4 million and benefited from a $5.0 million milestone payment received from Azurity Pharmaceuticals.

Research and Development (R&D) Expenses: R&D expenses for the fourth quarter of 2023 were $1.0 million compared to $0.9 million in the prior year period.

General and Administrative (G&A) Expenses: G&A expenses for the fourth quarter of 2023 were $4.6 million compared to $4.4 million in the prior year period. The slight increase in G&A expenses was primarily due to personnel additions.

Net Loss: Net loss for the fourth quarter of 2023 was $2.3 million or $0.09 per basic and diluted share compared to net income of $0.9 million or $0.04 per diluted share in the prior year period.

Cash Position: As of December 31, 2023, the Company had cash and cash equivalents of $21.4 million.

Conference Call and Webcast Information

As previously announced, Eton Pharmaceuticals will host its fourth quarter 2023 conference call as follows:

Date March 14, 2024
Time 4:30 p.m. ET (3:30 p.m. CT)
Register* (Audio Only) Click here

In addition to taking live questions from participants on the conference call, management will be answering emailed questions from investors. Investors can email questions to:

The live webcast can be accessed on the Investors section of Eton’s website at An archived webcast will be available on Eton’s website approximately two hours after the completion of the event and for 30 days thereafter.

* Conference call participants should register to obtain their dial-in and passcode details. Please be sure to register using a valid email address.

About Eton Pharmaceuticals

Eton is an innovative pharmaceutical company focused on developing and commercializing treatments for rare diseases. The Company currently has four FDA-approved rare disease products: ALKINDI SPRINKLE®, Carglumic Acid, Betaine Anhydrous, and Nitisinone. The Company has three additional product candidates in late-stage development: ET-400, ET-600, and ZENEO® hydrocortisone autoinjector. For more information, please visit our website at

Forward-Looking Statements

Statements contained in this press release regarding matters that are not historical facts are “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995, including statements associated with the expected ability of Eton to undertake certain activities and accomplish certain goals and objectives. These statements include but are not limited to statements regarding Eton’s business strategy, Eton’s plans to develop and commercialize its product candidates, the safety and efficacy of Eton’s product candidates, Eton’s plans and expected timing with respect to regulatory filings and approvals, and the size and growth potential of the markets for Eton’s product candidates. Because such statements are subject to risks and uncertainties, actual results may differ materially from those expressed or implied by such forward-looking statements. Words such as “believes,” “anticipates,” “plans,” “expects,” “intends,” “will,” “goal,” “potential” and similar expressions are intended to identify forward-looking statements. These forward-looking statements are based upon Eton’s current expectations and involve assumptions that may never materialize or may prove to be incorrect. Actual results and the timing of events could differ materially from those anticipated in such forward-looking statements as a result of various risks and uncertainties, which include, without limitation, risks associated with the process of discovering, developing and commercializing drugs that are safe and effective for use as human therapeutics, and in the endeavor of building a business around such drugs. These and other risks concerning Eton’s development programs and financial position are described in additional detail in Eton’s filings with the Securities and Exchange Commission. All forward-looking statements contained in this press release speak only as of the date on which they were made. Eton undertakes no obligation to update such statements to reflect events that occur or circumstances that exist after the date on which they were made.

Investor Relations:

Lisa M. Wilson, In-Site Communications, Inc.

T: 212-452-2793


Eton Pharmaceuticals, Inc.
(In thousands, except per share amounts)
  For the three months ended  For the years ended 
  December 31,  December 31,  December 31,  December 31, 
  2023  2022  2023  2022 
Licensing revenue $  $5,000  $5,500  $10,000 
Product sales and royalties, net  7,313   3,498   26,142   11,251 
Total net revenues  7,313   8,498   31,642   21,251 
Cost of sales:                
Licensing revenue  1,000   650   1,000   1,640 
Product sales and royalties  2,683   1,488   9,581   5,293 
Total cost of sales  3,683   2,138   10,581   6,933 
Gross profit (loss)  3,630   6,360   21,061   14,318 
Operating expenses:                
Research and development  1,047   944   3,322   3,996 
General and administrative  4,575   4,354   18,931   18,582 
Total operating expenses  5,622   5,298   22,253   22,578 
Income (loss) from operations  (1,992  1,062   (1,192)  (8,260)
Other (expense) income:                
Interest and other (expense) income, net  (17)  (150)  503   (761)
Gain on PPP loan forgiveness            
Gain on equipment sale            
Income (loss) before income tax expense  (2,008  912   (689)  (9,021)
Income tax expense  247      247    
Net income (loss) $(2,256 $912  $(936) $(9,021)
Net loss per share, basic $(0.09) $0.04  $(0.04) $(0.36)
Net loss per share, diluted $(0.09 $0.04  $(0.04) $(0.36)
Weighted average number of common shares outstanding, basic  25,741   25,381   25,645   25,146 
Weighted average number of common shares outstanding, diluted  25,741   25,691   25,645   25,146 

Eton Pharmaceuticals, Inc.
(in thousands, except share and per share amounts)
  December 31,  December 31, 
  2023  2022 
Current assets:        
Cash and cash equivalents $21,388  $16,305 
Accounts receivable, net  3,411   1,852 
Inventories  911   557 
Prepaid expenses and other current assets  1,129   1,290 
Total current assets  26,839   20,004 
Property and equipment, net  58   72 
Intangible assets, net  4,739   4,754 
Operating lease right-of-use assets, net  92   188 
Other long-term assets, net  12   12 
Total assets $31,740  $25,030 
Liabilities and stockholders’ equity        
Current liabilities:        
Accounts payable $1,848  $1,766 
Current portion of long-term debt  5,380   1,033 
Accrued liabilities  9,013   3,662 
Total current liabilities  16,241   6,461 
Long-term debt, net of discount and including accrued fees     5,384 
Operating lease liabilities, net of current portion  22   107 
Total liabilities  16,263   11,952 
Commitments and contingencies (Note 14)        
Stockholders’ equity        
Common stock, $0.001 par value; 50,000,000 shares authorized; 25,688,062 and 25,353,119 shares issued and outstanding at December 31, 2023 and 2022, respectively  26   25 
Additional paid-in capital  119,521   116,187 
Accumulated deficit  (104,070)  (103,134)
Total stockholders’ equity  15,477   13,078 
Total liabilities and stockholders’ equity $31,740  $25,030 

Eton Pharmaceuticals, Inc.
(In thousands)
  December 31,  December 31, 
  2023  2022 
Cash flows from operating activities        
Net loss $(936) $(9,021)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:        
Stock-based compensation  3,137   4,218 
Common stock issued for product candidate licensing rights      
Depreciation and amortization  901   1,774 
Debt discount amortization  117   127 
Gain on forgiveness of PPP loan      
Gain on sale of equipment      
Changes in operating assets and liabilities:        
Accounts receivable  (1,559)  3,619 
Inventories  (354)  (7)
Prepaid expenses and other assets  161   1,902 
Accounts payable  53   (8)
Accrued liabilities  5,295   2,217 
Net cash provided by (used in) operating activities  6,815   4,821 
Cash used in investing activities        
Proceeds from sale of equipment      
Purchases of property and equipment     (38)
Purchase of product licensing rights  (775)  (2,750)
Net cash used in investing activities  (775)  (2,788)
Cash flows from financing activities        
Proceeds from issuance of long-term debt, net of issuance costs      
Proceeds from sales of common stock, net of offering costs      
Proceeds from PPP and EIDL loans      
Debt paydown  (1,155)  (385)
Proceeds from employee stock purchase plan and stock option and stock warrant exercises  198   251 
Net cash (used in) provided by financing activities  (957)  (134)
Change in cash and cash equivalents  5,083   1,899 
Cash and cash equivalents at beginning of year  16,305   14,406 
Cash and cash equivalents at end of year $21,388  $16,305 
Supplemental disclosures of cash flow information        
Cash paid for interest $842  $730 
Cash paid for income taxes $247  $ 
Supplemental disclosures of non-cash investing and financing activities:        
Adjustment of operating lease right-of-use assets and liabilities due to tenant allowance $29  $ 
Right-of-use assets obtained in exchange for lease liabilities $  $188 

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