On August 2, 2023 Seagen Inc. (Nasdaq:SGEN) (Seagen or the Company) reported financial results for the second quarter ended June 30, 2023, highlighting record net product sales, with significant year-over-year growth of 26 percent (Press release, Seagen, AUG 2, 2023, View Source [SID1234633657]).

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David Epstein, Chief Executive Officer of Seagen said, "I am pleased to report an exceptional quarter with strong performance and growth seen across our commercial portfolio. We remain focused on optimizing the potential of our commercial portfolio, advancing our innovative pipeline of targeted therapies with ADCs at our core and innovating through next-generation technologies." Highlights include:

PADCEV (enfortumab vedotin-ejfv) in combination with Keytruda (pembrolizumab) received accelerated approval for first-line treatment of locally advanced or metastatic urothelial cancer in the U.S. and was added as a preferred regimen to NCCN treatment guidelines. The robust launch helped drive 36% net product sales growth for PADCEV over the first quarter of 2023;
ADCETRIS (brentuximab vedotin) net product sales grew sequentially for the last six quarters. The overall survival benefit demonstrated in the ECHELON-1 trial has now been included in the U.S. ADCETRIS label. Importantly, a phase 3 study of ADCETRIS with a modified chemotherapy regimen conducted by German Hodgkin Study Group demonstrated non-inferiority with an unprecedented 3-year progression-free survival of 94.9% compared to a more chemo-intensive international standard of care in advanced classical Hodgkin lymphoma, reinforcing the powerful impact this therapy has on patients’ lives;
TUKYSA (tucatinib) performed well in the quarter, demonstrating the critical role it has in the treatment of HER2-positive metastatic breast and colorectal cancer.
"I am particularly proud of our team’s execution, demonstrating our focus on our strategic priorities as we continue to deliver transformative therapies. In May, Seagen’s shareholders overwhelmingly supported the acquisition by Pfizer, which we believe will accelerate our ability to deliver transformative cancer medicines to more patients in need around the world," concluded Epstein.

Roger Dansey, President of Research and Development and Chief Medical Officer, added, "For our marketed therapies we expect several important data readouts with congress presentations this year, potentially broadening their utility. We are prioritizing development of our most transformative pipeline assets, as demonstrated by the recently initiated phase 3 trial for disitamab vedotin in combination with pembrolizumab in previously untreated metastatic HER2-positive urothelial cancer and soon to be initiated phase 3 trial of SGN-B6A in previously treated, metastatic non-small cell lung cancer. We also expect to file at least three INDs for new medicines by the end of this year, including for multiple ADCs that utilize next-generation drug linkers and payloads, as we seek to develop future transformational medicines."

PRODUCTS HIGHLIGHTS

PADCEV

Launched PADCEV with Keytruda for First-Line Treatment of Locally Advanced or Metastatic Urothelial Cancer (la/mUC) in the U.S.: In April 2023, Seagen, Astellas and Merck announced the FDA granted PADCEV (enfortumab vedotin-ejfv) with Keytruda (pembrolizumab) accelerated approval in the U.S. as a combination therapy for the treatment of adult patients with la/mUC who are not eligible to receive cisplatin-containing chemotherapy. It is the first treatment option combining an ADC with a PD-1 inhibitor in this patient population. Continued approval for this indication is contingent upon verification and description of clinical benefit in the EV-302 confirmatory trial.
The EV-302 Trial has Completed Patient Enrollment and Topline Results are Expected by the End of 2023: The trial enrolled patients regardless of their cisplatin-eligibility or PD-L1 expression and offers a platinum-free combination regimen. An extension study in China continues to enroll patients.
NCCN Clinical Practice Guidelines in Oncology (NCCN Guidelines) for Bladder Cancer Updated to Include PADCEV and Keytruda Combination as Preferred Regimen: In April 2023, based on the results of the EV-103 trial, the NCCN Guidelines were updated to include PADCEV with Keytruda as a Preferred Regimen (Category 2A) for first-line therapy for patients with la/mUC who are not eligible to receive cisplatin-containing chemotherapy.
Data Presented in Earlier Stages of Disease for Muscle-Invasive and Non-Muscle Invasive Forms of Bladder Cancer and in First-Line la/mUC at the American Society of Clinical Oncology (ASCO) (Free ASCO Whitepaper) Annual Meeting: In June 2023, presentations included long-term follow-up data from the EV-103 trial dose-escalation/Cohort A, which is evaluating PADCEV in combination with pembrolizumab as first-line treatment in patients with locally advanced or metastatic urothelial carcinoma who are ineligible to receive cisplatin-based chemotherapy, demonstrated a manageable safety profile after approximately 4 years of follow-up and clinically meaningful efficacy with a median survival exceeding 2 years.
ADCETRIS

Label Updated with Overall Survival Benefit Demonstrated in the Phase 3 ECHELON-1 Trial: In June 2023, the U.S. Prescribing Information for ADCETRIS was updated to include six-year overall survival results from the phase 3 ECHELON-1 clinical trial of ADCETRIS plus combination chemotherapy in patients with previously untreated Stage III or IV classical Hodgkin lymphoma compared to chemotherapy alone. The update was based on statistically significant 41% reduction in risk of death versus the previous standard of care in patients with frontline advanced classical Hodgkin lymphoma.
Combination Regimen Data from Multiple Clinical Trials Presented at the International Conference on Malignant Lymphoma: In June 2023, updated results from Part C of a phase 2 single-arm trial (SGN35-027) evaluating the ADCETRIS in combination with the PD-1 inhibitor nivolumab and standard chemotherapy agents doxorubicin and dacarbazine (AN+AD) for the frontline treatment of patients with early-stage classical Hodgkin lymphoma showed a high overall response rate of 98% and a 93% complete response rate. The regimen was well tolerated, with the most frequently reported treatment-related adverse events of any grade occurring in more than 30 percent of patients being nausea (65%), peripheral sensory neuropathy (47%) and fatigue (44%). Separately, a phase 3 trial, called HD21, from the clinical research cooperative German Hodgkin Study Group was presented. The results demonstrated that ADCETRIS with a modified chemotherapy regimen showed non-inferiority with unprecedented 3-year progression free survival of 94.9% versus a less tolerable international standard of care in advanced classical Hodgkin lymphoma. The 12-month post-treatment safety data were consistent with previously presented HD21 data results at the American Society of Hematology (ASH) (Free ASH Whitepaper) 2022 Annual Meeting.
TUKYSA

Data Presented in HER2-positive Biliary Tract Cancer at the ASCO (Free ASCO Whitepaper) Annual Meeting: In June 2023, data were presented from a phase 2 basket study of TUKYSA and trastuzumab in previously treated HER2-positive metastatic biliary tract cancer. The combination had clinically meaningful antitumor activity with a confirmed objective response rate of 46.7% and a median duration of response of 6.0 months. The combination was well tolerated, with the most common treatment-emergent adverse events being pyrexia (43.3%) and diarrhea (40.0%).
Topline Results for Phase 3 HER2CLIMB-02 Clinical Trial Expected in 3Q23: The Company expects to report topline results of the phase 3 HER2CLIMB-02 clinical trial evaluating TUKYSA versus placebo, in combination with Kadcyla (ado-trastuzumab emtansine), for patients with locally advanced or metastatic HER2-positive breast cancer, including those with brain metastases.
TIVDAK

Data Presented from innovaTV 207 Trial in Solid Tumors at the American Association for Cancer Research (AACR) (Free AACR Whitepaper) Annual Meeting: In April 2023, data were presented from an interim analysis of Part C from the innovaTV 207 phase 2 study of TIVDAK (tisotumab vedotin-tftv) given every 2 weeks in patients with recurrent or metastatic squamous cell carcinoma of the head and neck who have progressed on or after prior platinum combination, immunotherapy and targeted therapy, if eligible. Preliminary data based on the first 15 patients demonstrated encouraging antitumor activity with a confirmed overall response rate of 40% and a manageable safety profile.
Topline Results for Phase 3 innovaTV 301 Clinical Trial Anticipated As Early As YE23: The Company expects to report topline results of the phase 3 innovaTV 301 clinical trial evaluating TIVDAK monotherapy versus investigator choice chemotherapy for patients with second- or third-line recurrent or metastatic cervical cancer.
PIPELINE PROGRAMS

Initiated a Phase 3 trial for Disitamab Vedotin for Patients with HER2-Positive, Metastatic Urothelial Cancer: We initiated a phase 3 trial evaluating disitamab vedotin in combination with pembrolizumab versus chemotherapy in patients with previously untreated locally advanced or metastatic HER2-positive urothelial cancer in the third quarter of 2023.
Planned Initiation of a Phase 3 trial for SGN-B6A for Patients with Metastatic Non-Small Cell Lung Cancer: We plan to initiate a phase 3 trial evaluating SGN-B6A monotherapy compared to standard of care, docetaxel, in patients with previously treated non-small cell lung cancer in the fourth quarter of 2023.
Multiple Abstracts on Early-Stage Pipeline Presented at the AACR (Free AACR Whitepaper) and ASCO (Free ASCO Whitepaper) Annual Meetings: Early-stage pipeline data presented at AACR (Free AACR Whitepaper) included clinical, preclinical and discovery research programs. The first clinical data was presented for SEA-TGT that demonstrated a manageable and tolerable safety profile with initial monotherapy antitumor activity in solid tumors and lymphomas. In addition, data on multiple new ADC technologies were presented. These included the first preclinical data from Seagen and Sanofi for a novel topoisomerase I inhibitor ADC targeting CEACAM5, which demonstrated potent antitumor activity in patient-derived colorectal cancer models. Early-stage pipeline data presented at ASCO (Free ASCO Whitepaper) included updated phase 1 data for SGN-B6A, a wholly-owned, first-in-class vedotin ADC directed to integrin beta-6, a novel target that is highly expressed in multiple solid tumors.
For additional information on Seagen’s pipeline, visit www.seagen.com/science/pipeline.

CORPORATE HIGHLIGHT

Seagen Stockholders Approve Acquisition by Pfizer: In May 2023, at a special meeting, Seagen stockholders voted to approve a proposal to adopt the previously announced merger agreement under which Pfizer will acquire Seagen for $229 per share in cash. More than 99% of the shares that were voted at the meeting, representing approximately 88% of the shares of Seagen common stock issued and outstanding as of the record date for the special meeting, were voted in favor of the proposal to adopt the merger agreement. Subject to the fulfillment of customary closing conditions, including receipt of required regulatory approvals, the acquisition is expected to close in late 2023 or early 2024.
SECOND QUARTER AND SIX-MONTHS 2023 FINANCIAL RESULTS

Revenues: Total revenues for the second quarter and six months ended June 30, 2023 were $604 million and $1.1 billion, respectively, compared to $498 million and $924 million for the same periods in 2022, primarily driven by growth in net product sales.

Revenues included the following components:

Three months ended June 30,

Six months ended June 30,

(dollars in millions)

2023

2022

% Change

2023

2022

% Change

Total Net Product Sales

$

544

$

432

26

%

$

1,013

$

815

24

%

ADCETRIS

$

262

$

202

30

%

$

505

$

383

32

%

PADCEV

$

161

$

124

30

%

$

280

$

224

25

%

TUKYSA

$

99

$

89

11

%

$

187

$

179

4

%

TIVDAK

$

22

$

17

26

%

$

41

$

29

44

%

Royalty Revenues

$

51

$

39

31

%

$

81

$

67

21

%

Collaboration and License Agreement Revenues

$

9

$

27

(68

)%

$

30

$

42

(29

)%

Note: Sum of product sales may not equal total net product sales due to rounding. Percent change reflects actual (unrounded) values.

Net Product Sales: The increases in net product sales for the second quarter and year-to-date of 2023 compared to the same periods in 2022 were driven by continued commercial execution. ADCETRIS performance was primarily attributed to volume growth, driven by greater use in frontline advanced Hodgkin lymphoma. PADCEV growth was driven by use as first-line treatment for locally advanced or metastatic urothelial cancer following its approval for this indication in April 2023. Of note, PADCEV sales in the second quarter of 2022 included $19 million in sales to another company for a clinical trial they are conducting, while no such sales were booked in the second quarter of 2023. TUKYSA performance reflects the important role it serves in the treatment of HER2-positivive metastatic breast cancer, competitive dynamics in this setting as well as early contributions from its colorectal cancer indication. TIVDAK growth reflects continued uptake in its current indication.
Royalty Revenues: Royalty revenues were primarily driven by sales of ADCETRIS outside the U.S. and Canada by Takeda as well as royalties from sales of Polivy (polatuzumab vedotin) by Roche, which is an ADC that uses Seagen technology.
Collaboration and License Agreement Revenues: The decrease in collaboration and license agreement revenues was primarily driven by a prior period milestone payment and decreased revenues from drug product supplied to collaborators.
Cost of Sales: Cost of sales for the second quarter and year-to-date in 2023 were $181 million and $293 million, respectively, compared to $106 million and $194 million for the same periods in 2022. The increases reflect higher sales of our medicines and the related gross profit share amounts owed to collaboration partners, which were $82 million and $146 million in the second quarter and year-to-date in 2023, respectively, compared to $66 million and $118 million for the same periods in 2022. Cost of sales also reflects amortization of TUKYSA acquired in-process technology costs, third-party royalties owed for PADCEV and TUKYSA net product sales, and cost of products sold. The second quarter of 2023 cost of sales included a $47 million inventory write-off related to in-process production of one of our products that did not meet a release specification that was updated in June 2023. This inventory adjustment and new release specification are not expected to impact availability of product supply required to meet current or future demand.

Research and Development (R&D) Expenses: R&D expenses for the second quarter and year-to-date in 2023 were $400 million and $756 million, respectively, compared to $304 million and $602 million for the same periods in 2022 reflecting continued investment in clinical development of the Company’s approved drugs and pipeline programs.

Selling, General and Administrative (SG&A) Expenses: SG&A expenses for the second quarter and year-to-date in 2023 were $244 million and $480 million, respectively, compared to $220 million and $394 million for the same periods in 2022. The increase 2023 were driven by ongoing commercialization efforts, as well as $36 million in expenses year-to-date associated with the pending acquisition by Pfizer and other corporate activities.

Non-cash, share-based compensation expense for the six months ended June 30, 2023 was $157 million, compared to $98 million for the same period in 2022.

Net Loss: Net loss for the second quarter of 2023 was $212 million, or $1.13 per diluted share, and net loss for the year-to-date of 2023 was $386 million, or $2.06 per diluted share.

Net loss for the second quarter of 2022 was $135 million, or $0.73 per diluted share, and net loss for the year-to-date of 2022 was $271 million, or $1.48 per diluted share.

Cash and Investments: As of June 30, 2023, Seagen had $1.3 billion in cash and investments.

CONFERENCE CALL

Given the pending acquisition of Seagen by Pfizer, Seagen is no longer providing financial guidance for 2023 and will not be hosting its quarterly conference call and does not expect to do so for future quarters. Earnings materials are available publicly on the Investor Relations page of our website at investor.seagen.com. Please direct any questions to Seagen Investor Relations at the contact information below.