Mirum Pharmaceuticals Reports Fourth Quarter and Year-End 2023 Financial Results and Provides Business Update

- Net product sales totaled $178.9 million, and full year 2023 revenue totaled $186.4 million, delivering 142% growth over 2022 total revenue

- 2024 expected global net product sales of $310 million to $320 million

- LIVMARLI PFIC PDUFA date on track for March 13, 2024

- Volixibat VISTAS and VANTAGE interim analyses expected in first half of 2024

- Conference call to provide business updates today, February 28 at 1:30 p.m. PT/4:30 p.m. ET

Mirum Pharmaceuticals, Inc. (Nasdaq: MIRM) today reported financial results for the fourth quarter and year-end 2023 and provided a business update.

“2023 was a landmark year for Mirum as we significantly expanded our commercial footprint, realizing $179 million in net product sales, and achieved another year of strong global LIVMARLI growth. We also successfully integrated CHOLBAM and CHENODAL into our portfolio, which strengthened our position as a leader in rare disease,” said Chris Peetz, chief executive officer at Mirum. “In 2024, we look forward to further expanding the reach of our approved medicines, potential LIVMARLI and CHENODAL label expansions and interim analyses for our volixibat adult indications. Operationally and financially, we are well positioned for this next phase of growth and remain committed to our mission of delivering life changing medicines to patients in need.”

Commercial: Leading Pediatric Hepatology Franchise

  • Net product sales totaled $178.9 million, and full year 2023 revenue totaled $186.4 million, representing 142% growth over 2022 total revenue.
  • 2023 LIVMARLI net product sales totaled $141.8 million, representing approximately 89% growth over 2022 net product sales.
  • International business grew to 18 countries with reimbursed access to LIVMARLI.
  • Expect continued revenue growth across all approved medicines in 2024 with expected global net product sales of $310 million to $320 million.

Regulatory & Pipeline: Multiple Upcoming 2024 Milestones

  • U.S. Food and Drug Administration (FDA) Prescription Drug User Free Act (PDUFA) date for LIVMARLI in progressive familial intrahepatic cholestasis (PFIC) is March 13, 2024.
  • New Drug Application (NDA) submission for CHENODAL in CTX planned in first half 2024.
  • Volixibat VISTAS study in primary sclerosing cholangitis blinded interim analysis expected in first half 2024.
  • Volixibat VANTAGE study in primary biliary cholangitis interim analysis expected in first half 2024.

Corporate and Financial: Strong Balance Sheet, Financially Sustaining Scale

  • Total net product sales for the full year ended December 31, 2023, was $178.9 million compared to $75.1 million for the full year ended December 31, 2022.
  • Total operating expenses were $293.0 million for the full year ended December 31, 2023, compared to $208.3 million for the full year ended December 31, 2022.
  • The increase in year-over-year operating expense was due to a $32.2 million increase in cost of goods sold and a $56.8 million increase in sales, general and administrative expense, partially offset by a $4.2 million decrease in research and development expense.
  • As of December 31, 2023, Mirum had cash and cash equivalents of $286.3 million.
  • Announced the appointment of Joanne Quan, M.D. as Chief Medical Officer.

The foregoing financial information is unaudited and subject to change, and actual results may vary from the foregoing.

Business Update Conference Call

Mirum will host a conference call today, February 28, 2024, at 1:30 p.m. PT/4:30 p.m. ET, to discuss its financial results, guidance, and provide business updates. Join the call using the following details:

Conference Call Details:

U.S./Toll-Free: +1 833 470 1428

International: +1 404 975 4839

Passcode: 089049

You may also access the call via webcast by visiting the Events & Presentations section on Mirum’s website. A replay of this webcast will be available for 30 days.

About LIVMARLI® (maralixibat) oral solution

LIVMARLI® (maralixibat) oral solution is an orally administered, once-daily, ileal bile acid transporter (IBAT) inhibitor approved by the U.S. Food and Drug Administration for the treatment of cholestatic pruritus in patients with Alagille syndrome (ALGS) three months of age and older. LIVMARLI is also approved by the European Commission for the treatment of cholestatic pruritus in patients with ALGS two months and older. For more information for U.S. residents, please visit LIVMARLI.com.

Mirum has also submitted LIVMARLI for approval in the U.S. for the treatment of cholestatic pruritus in patients with PFIC three months of age and older, and in Europe for the treatment of PFIC in patients two months of age and older.

LIVMARLI has received Breakthrough Therapy designation for ALGS and PFIC type 2 and orphan designation for ALGS and PFIC. To learn more about ongoing clinical trials with LIVMARLI, please visit Mirum’s clinical trials section on the company’s website.

IMPORTANT SAFETY INFORMATION

LIVMARLI can cause side effects, including:

Changes in liver tests. Changes in certain liver tests are common in patients with Alagille syndrome and can worsen during treatment with LIVMARLI. These changes may be a sign of liver injury and can be serious. Your healthcare provider should do blood tests before starting and during treatment to check your liver function. Tell your healthcare provider right away if you get any signs or symptoms of liver problems, including nausea or vomiting, skin or the white part of the eye turns yellow, dark or brown urine, pain on the right side of the stomach (abdomen) or loss of appetite.

Stomach and intestinal (gastrointestinal) problems. LIVMARLI can cause stomach and intestinal problems, including diarrhea, stomach pain, and vomiting during treatment. Tell your healthcare provider right away if you have any of these symptoms more often or more severely than normal for you.

A condition called Fat Soluble Vitamin (FSV) Deficiency is caused by low levels of certain vitamins (vitamin A, D, E, and K) stored in body fat. FSV deficiency is common in patients with Alagille syndrome but may worsen during treatment. Your healthcare provider should do blood tests before starting and during treatment.

Other common side effects reported during treatment were bone fractures and gastrointestinal bleeding.

US Prescribing Information

EU SmPC

About Volixibat

Volixibat is an oral, minimally absorbed agent designed to selectively inhibit the ileal bile acid transporter (IBAT). Volixibat may offer a novel approach in the treatment of adult cholestatic diseases by blocking the recycling of bile acids, through inhibition of IBAT, thereby reducing bile acids systemically and in the liver. Phase 1 and Phase 2 studies of volixibat demonstrated on-target fecal bile acid excretion, a pharmacodynamic marker of ASBT inhibition, in addition to decreases in LDL cholesterol and increases in 7αC4 which are markers of bile acid synthesis. Volixibat has been evaluated in more than 400 individuals across multiple clinical trials. The most common adverse events reported were mild to moderate gastrointestinal events observed in the volixibat groups.

Volixibat is currently being evaluated in Phase 2b studies for primary sclerosing cholangitis (VISTAS study), and primary biliary cholangitis (VANTAGE study).

About CHOLBAM® (cholic acid) capsules

The FDA approved CHOLBAM® (cholic acid) capsules in March 2015, the first FDA-approved treatment for pediatric and adult patients with bile acid synthesis disorders due to single enzyme defects, and for adjunctive treatment of patients with peroxisome biogenesis disorder-Zellweger spectrum disorder. The effectiveness of CHOLBAM® has been demonstrated in clinical trials for bile acid synthesis disorders and the adjunctive treatment of peroxisomal disorders. An estimated 200 to 300 patients are current candidates for therapy.

CHOLBAM® (cholic acid) Indication

CHOLBAM is a bile acid indicated for

  • Treatment of bile acid synthesis disorders due to single enzyme defects.
  • Adjunctive treatment of peroxisomal disorders, including Zellweger spectrum disorders, in patients who exhibit manifestations of liver disease, steatorrhea, or complications from decreased fat-soluble vitamin absorption.

LIMITATIONS OF USE

The safety and effectiveness of CHOLBAM on extrahepatic manifestations of bile acid synthesis disorders due to single enzyme defects or peroxisomal disorders, including Zellweger spectrum disorders, have not been established.

IMPORTANT SAFETY INFORMATION

WARNINGS AND PRECAUTIONS – Exacerbation of liver impairment

  • Monitor liver function and discontinue CHOLBAM in patients who develop worsening of liver function while on treatment.
  • Concurrent elevations of serum gamma glutamyltransferase (GGT) and alanine aminotransferase (ALT) may indicate CHOLBAM overdose.
  • Discontinue treatment with CHOLBAM at any time if there are clinical or laboratory indicators of worsening liver function or cholestasis.

ADVERSE REACTIONS

  • The most common adverse reactions (≥1%) are diarrhea, reflux esophagitis, malaise, jaundice, skin lesion, nausea, abdominal pain, intestinal polyp, urinary tract infection, and peripheral neuropathy.

Please see full Prescribing Information for additional Important Safety Information.

About CHENODAL® (chenodiol) tablets

CHENODAL® is a synthetic oral form of chenodeoxycholic acid (CDCA), a naturally occurring primary bile acid synthesized from cholesterol in the liver. The FDA approved CHENODAL for the treatment of people with radiolucent stones in the gallbladder. In 2010, CHENODAL was granted orphan drug designation for the treatment of cerebrotendinous xanthomatosis (CTX), a rare autosomal recessive lipid storage disease.

While CHENODAL® is not currently approved for CTX, it received a medical necessity determination in the U.S. by the FDA and has been used as the standard of care for more than three decades. A Phase 3 clinical trial for this indication has recently been completed and based on the positive results, a New Drug Application (NDA) submission for CHENODAL in CTX planned in first half 2024. We believe the prevalent patient population in the United States with CTX exceeds 1,000.

About Mirum Pharmaceuticals, Inc.

Mirum Pharmaceuticals, Inc. is a biopharmaceutical company dedicated to transforming the treatment of rare diseases affecting children and adults. Mirum has three approved medications: LIVMARLI® (maralixibat) oral solution, CHOLBAM® (cholic acid) capsules, and CHENODAL® (chenodiol) tablets.

LIVMARLI, an IBAT inhibitor, is approved for the treatment of cholestatic pruritus in patients with Alagille syndrome in the U.S. (three months and older), in Europe (two months and older), and in other regions globally. Mirum has also submitted LIVMARLI for approval in the U.S. in cholestatic pruritus in PFIC patients three months of age and older and in Europe in PFIC for patients three months of age and older. CHOLBAM is FDA-approved for the treatment of bile acid synthesis disorders due to single enzyme deficiencies and adjunctive treatment of peroxisomal disorders in patients who show signs or symptoms or liver disease. CHENODAL has received medical necessity recognition by the FDA to treat patients with cerebrotendinous xanthomatosis (CTX).

Mirum’s late-stage pipeline includes two investigational treatments for debilitating liver diseases. Volixibat, an IBAT inhibitor, is being evaluated in two potentially registrational studies including the Phase 2b VISTAS study for primary sclerosing cholangitis and Phase 2b VANTAGE study for primary biliary cholangitis. Lastly, CHENODAL, has been evaluated in a Phase 3 clinical study, RESTORE, to treat patients with CTX, with positive topline results reported in 2023.

To learn more about Mirum, visit mirumpharma.com and follow Mirum on Facebook, LinkedIn, Instagram and Twitter.

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. Such forward-looking statements include statements regarding, among other things continued commercial success for our approved products, including growth in year over year net product sales, having sufficient cash and cash equivalent reserves, planned expansion into additional international markets, LIVMARLI label expansion into PFIC, the timing and results of LIVMARLI’s PDUFA, CHENODAL potential full indication in CTX, delivering life changes medicines and becoming a global leader in rare disease, the results, conduct and progress of Mirum’s ongoing and planned studies for its product candidates, the timing and results of interim analyses of our ongoing studies and the regulatory approval path for its product candidates globally. 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 “expected,” “forecasts,” “forward,” “planned,” “poised,”, “positioned” “potential”, “will” and similar expressions are intended to identify forward-looking statements. These forward-looking statements are based upon Mirum’s current expectations and involve assumptions that may never materialize or may prove to be incorrect. Actual results could differ materially from those anticipated in such forward-looking statements as a result of various risks and uncertainties, which include, without limitation, risks and uncertainties associated with Mirum’s business in general, the impact of geopolitical and macroeconomic events, and the other risks described in Mirum’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2023 and subsequent 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 and are based on management’s assumptions and estimates as of such date. Mirum undertakes no obligation to update such statements to reflect events that occur or circumstances that exist after the date on which they were made, except as required by law.

Mirum Pharmaceuticals, Inc.
Condensed Consolidated Statement of Operations Data
(in thousands, except share and per share amounts)

(Unaudited)

 
Three Months Ended Year ended
December 31, December 31,

2023

2022

2023

2022

 
 
Revenue:
Product sales, net

$

69,554

 

$

27,906

 

$

178,874

 

$

75,062

 

License revenue

 

-

 

 

-

 

 

7,500

 

 

2,000

 

Total revenue

 

69,554

 

 

27,906

 

 

186,374

 

 

77,062

 

Operating expenses:
Cost of sales (1)

 

22,510

 

 

4,494

 

 

44,529

 

 

12,374

 

Research and development

 

30,935

 

 

31,105

 

 

102,609

 

 

106,842

 

Selling, general and administrative

 

46,184

 

 

26,468

 

 

145,880

 

 

89,066

 

Total operating expenses (2)

 

99,629

 

 

62,067

 

 

293,018

 

 

208,282

 

Loss from operations

 

(30,075

)

 

(34,161

)

 

(106,644

)

 

(131,220

)

Other income (expense):
Interest income

 

3,775

 

 

2,143

 

 

13,735

 

 

3,857

 

Interest expense

 

(3,563

)

 

(4,359

)

 

(15,105

)

 

(15,979

)

Change in fair value of derivative liability

 

-

 

 

674

 

 

-

 

 

906

 

Loss from termination of revenue interest purchase agreement

 

-

 

 

-

 

 

(49,076

)

 

-

 

Other (expense) income, net

 

(3,061

)

 

(588

)

 

(2,824

)

 

365

 

Net loss before for income taxes

 

(32,924

)

 

(36,291

)

 

(159,914

)

 

(142,071

)

Provision for (benefit from) income taxes

 

225

 

 

140

 

 

991

 

 

(6,406

)

Net loss

$

(33,149

)

$

(36,431

)

$

(160,905

)

$

(135,665

)

 
Net loss per share:
Basic

$

(3.94

)

$

(4.01

)

 
Diluted

$

(3.94

)

$

(4.02

)

 
Weighted-average shares of common stock outstanding:
Basic

 

40,885,124

 

 

33,839,072

 

 
Diluted

 

40,885,124

 

 

33,982,493

 

 
 

(1) Amounts include intangible amortization expense as follows:

 
Intangible amortization

$

5,305

 

$

1,078

 

$

10,404

 

$

2,893

 

 

(2) Amounts include stock-based compensation expense as follows:

 
Research and development

$

2,879

 

$

2,531

 

$

10,892

 

$

10,050

 

Selling, general and administrative

 

6,841

 

 

4,365

 

 

24,131

 

 

16,957

 

Total stock-based compensation

$

9,720

 

$

6,896

 

$

35,023

 

$

27,007

 

Mirum Pharmaceuticals, Inc.
Condensed Consolidated Balance Sheet Data
(Unaudited)
 
December 31, 2023 December 31, 2022
 
Assets
Current assets:
Cash and cash equivalents

$

286,326

 

$

28,003

 

Short-term investments

 

-

 

 

123,716

 

Accounts receivable

 

67,968

 

 

23,994

 

Inventory

 

19,590

 

 

5,565

 

Prepaid expenses and other current assets

 

10,935

 

 

8,947

 

Total current assets

 

384,819

 

 

190,225

 

Restricted cash and cash equivalents

 

-

 

 

100,000

 

Intangible assets, net

 

252,925

 

 

58,954

 

Other noncurrent assets

 

6,155

 

 

3,727

 

Total assets

$

643,899

 

$

352,906

 

Liabilities and Stockholders’ Equity
Current liabilities:
Accounts payable

$

7,416

 

$

8,690

 

Accrued expenses

 

77,161

 

 

54,018

 

Other current liabilities

 

1,104

 

 

2,021

 

Total current liabilities

 

85,681

 

 

64,729

 

Revenue interest liability, net

 

-

 

 

140,351

 

Convertible notes, net

 

306,421

 

 

-

 

Other noncurrent liabilities

 

617

 

 

5,789

 

Total liabilities

 

392,719

 

 

210,869

 

Commitments and contingencies
Stockholders' equity:
Preferred stock

 

-

 

 

-

 

Common stock

 

5

 

 

4

 

Additional paid-in capital

 

803,260

 

 

535,074

 

Accumulated deficit

 

(553,729

)

 

(392,824

)

Accumulated other comprehensive income (loss)

 

1,644

 

 

(217

)

Total stockholders' equity

 

251,180

 

 

142,037

 

Total liabilities and stockholders' equity

$

643,899

 

$

352,906

 

 

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