The following discussion of our financial condition and results of operations should be read in conjunction with our financial statements and the notes to those financial statements appearing elsewhere in this Quarterly Report on Form 10-Q and the audited consolidated financial statements and notes thereto and management's discussion and analysis of financial condition and results of operations for the year ended December 31, 2022 included in our Annual Report on Form 10-K. This discussion contains forward-looking statements that involve significant risks and uncertainties. As a result of many factors, such as those set forth in Part II, Item 1A. Risk Factors of this Quarterly Report on Form 10-Q, which are incorporated herein by reference, our actual results may differ materially from those anticipated in these forward-looking statements.

Overview

We are a biopharmaceutical company based in Cambridge, Massachusetts that is entitled to receive up to $450.0 million in contingent milestone payments related to our sale of ONIVYDE® to Ipsen S.A., or Ipsen, in April 2017 and up to $54.5 million in contingent milestone payments related to our sale of MM-121 and MM-111 to Elevation Oncology, Inc. (formerly known as 14ner Oncology, Inc.), or Elevation, in July 2019. We do not have any ongoing research or development activities and are seeking potential acquirers for our remaining preclinical and clinical assets. We do not have any employees and instead use external consultants for the operation of our company.

On April 3, 2017, we completed the sale of ONIVYDE and MM-436 (the "commercial business") to Ipsen (the "Ipsen sale"). In connection with the Ipsen sale, we are eligible to receive up to $450.0 million in additional regulatory approval-based milestone payments.

The remaining up to $450.0 million in potential milestone payments resulting from the Ipsen sale consist of:

$225.0 million upon approval by the U.S. Food and Drug Administration, or FDA, of ONIVYDE for the first-line treatment of metastatic adenocarcinoma of the pancreas, subject to certain conditions;

$150.0 million upon approval by the FDA of ONIVYDE for the treatment of small-cell lung cancer after failure of first-line chemotherapy; and

$75.0 million upon approval by the FDA of ONIVYDE for an additional indication unrelated to those described above.

Our non-commercial assets, including our clinical and preclinical development programs, were not included in the Ipsen sale and remain assets of ours.



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In November 2022, Ipsen announced the Phase III NAPOLI 3 trial of Onivyde® (irinotecan liposome injection) plus 5-fluorouracil/leucovorin and oxaliplatin (the "NALIRIFOX regimen") met its primary endpoint demonstrating clinically meaningful and statistically significant improvement in overall survival compared to nab-paclitaxel plus gemcitabine in 770 previously untreated patients with metastatic pancreatic ductal adenocarcinoma ("mPDAC") and key secondary efficacy outcome of progression-free survival (PFS) also showed significant improvement over the comparator arm. Ipsen also announced that the safety profile of Onivyde in the NAPOLI 3 trial was consistent with those observed in the previous phase I/II mPDAC study. Ipsen also stated that it intends to file a supplemental New Drug Application with the U.S. Food and Drug Administration for Onivyde in combination with oxaliplatin plus 5-fluorouracil/leucovorin for the treatment of patients with previously untreated mPDAC following the Fast Track Designation granted in 2020. In January 2023, Ipsen presented clinical trial results at the 2023 American Society of Clinical Oncology (ASCO) Gastrointestinal Cancers Symposium. In February 2023 Ipsen provided guidance to investors that it intends to file a supplemental New Drug Application with the U.S. Food and Drug Administration during the first half of 2023 following the Fast Track Designation granted in 2020 for the use of Onivyde in combination with oxaliplatin plus 5-fluorouracil/leucovorin for the treatment of patients with previously untreated mPDAC.

In August 2022, Ipsen announced that the Phase III RESILIENT trial did not meet its primary endpoint of overall survival compared to topotecan. The trial is evaluating Onivyde® (irinotecan liposomal injection) versus topotecan in patients with small cell lung cancer, who have progressed on or after platinum-based first-line therapy treatment. RESILIENT is a Phase III trial conducted in two parts; the first part read out in 2020 confirming the safety, dosing and efficacy of Onivyde; part two is evaluating the efficacy of Onivyde versus topotecan. The analysis concluded that the primary endpoint overall survival was not met in patients treated with Onivyde versus topotecan. However, a doubling of the secondary endpoint of objective response rate in favor of Onivyde was observed. The safety and tolerability of Onivyde was consistent with its already-known safety profile, and no new safety concerns emerged. The clinical study results will be communicated with the regulatory agency. Ipsen indicated that while the results from the analysis of the RESILIENT trial have not demonstrated an overall survival benefit with Onivyde in patients in second-line small cell lung cancer, Ipsen intends to analyze the data further before decisions regarding next steps are made. To date, there have been no further public announcements by Ipsen regarding these matters and it remains unclear as to whether Ipsen will continue to seek approval for the use of ONIVYDE in the small cell lung cancer application. If Ipsen elects not to proceed with seeking regulatory approval, or if regulatory approval is not obtained, we would not be entitled to the $150 million milestone payment tied to approval of Onivyde for treating small cell lung cancer.

On May 30, 2019, we announced the completion of our review of strategic alternatives, following which our board of directors implemented a series of measures designed to extend our cash runway into 2027 and preserve our ability to capture the potential milestone payments resulting from the Ipsen sale. We have based this estimate on assumptions that may prove to be wrong, and we could use our financial resources sooner than we currently expect. In connection with that announcement, we discontinued the discovery efforts on our remaining preclinical programs: MM-401, an agonistic antibody targeting a novel immuno-oncology target, TNFR2; and MM-201, a highly stabilized agonist-Fc fusion protein targeting death receptors 4 and 5. We are seeking potential acquirers for our remaining preclinical and clinical assets.

The termination of our executive management team and all other employees was substantially completed by June 28, 2019 and fully completed by July 12, 2019. As of July 12, 2019, we did not have any employees. We have engaged external consultants to run our day-to-day operations. We have also entered into consulting agreements with certain former members of our executive management team who are supporting our relationship with current partners, assisting with the potential sale of remaining preclinical and clinical assets, and assisting with certain legal and regulatory matters and the continued wind-down of operations.

On July 12, 2019, we completed the sale to Elevation, or the Elevation sale, of our anti-HER3 antibody programs, MM-121 (seribantumab) and MM-111. In connection with the Elevation sale, we received an upfront cash payment of $3.5 million and are eligible to receive up to $54.5 million in additional potential development, regulatory approval and commercial-based milestone payments, consisting of:

$3.0 million for achievement of the primary endpoint in the first registrational clinical study of either MM-121 or MM-111;

Up to $16.5 million in total payments for the achievement of various regulatory approval and reimbursement-based milestones in the United States, Europe and Japan; and

Up to $35.0 million in total payments for achieving various cumulative worldwide net sales targets between $100.0 million and $300.0 million for MM-121 and MM-111.

In January 2023, Elevation announced it is pausing further investment in the clinical development of seribantumab and intends to pursue further development only in collaboration with a partner. On March 14, 2023, Elevation Oncology announced that it would be presenting two posters on NRG1 fusions, including updated data from the Phase 2 CRESTONE study evaluating seribantumab in



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patients with solid tumors harboring NRG1 fusions at the American Association for Cancer Research (AACR) Annual Meeting 2023, held April 14-19, 2023.

On March 27, 2020, we entered into an Asset Purchase Agreement (the "Celator Asset Purchase Agreement") with Celator Pharmaceuticals, Inc. (the "Buyer"), pursuant to which the Buyer agreed to purchase certain assets (the "Transferred Assets") relating to certain of our preclinical nanoliposome programs (the "Transaction"). We completed the Transaction simultaneously with the execution of the Celator Asset Purchase Agreement. Under the terms of the Celator Asset Purchase Agreement, the Buyer paid to us a cash payment of $2.3 million and reimbursed us for $0.2 million related to certain specified expenses and to assume certain liabilities with respect to the Transferred Assets. We incurred $0.4 million expenses related to the Transaction.

On September 15, 2021, we entered into an Asset Purchase Option Agreement (the "Asset Purchase Option Agreement") with a third party, pursuant to which the third party obtained an exclusive option, to purchase one of our preclinical programs with a consideration of $0.5 million. Under the terms of the Asset Purchase Option Agreement, the third party paid to us the option fee of $0.1 million.. On March 1, 2022, the third party exercised the option and we received consideration of $0.5 million and a gain of $0.5 million was recognized in March 2022.

On January 23, 2023, we entered into an Asset Purchase Option Agreement (the "Option Agreement") with a third party (the "Purchaser"), pursuant to which the Purchaser agreed to obtain an exclusive option (the "Option") to purchase one of the Company's preclinical programs with a consideration of $700 thousand. Under the terms of the Option Agreement, the Purchaser paid to us the Option fee of $150 thousand and we incurred transaction cost of $11 thousand. A net gain of $139 thousand was recognized in January 2023. The Purchaser may exercise the Option prior to July 23, 2023.

We previously devoted substantially all of our resources to our drug discovery and development efforts, including conducting clinical trials for our product candidates, protecting our intellectual property and providing general and administrative support for these operations. We have financed our operations primarily through private placements of convertible preferred stock, collaborations, public offerings of our securities, secured debt financings, sales of ONIVYDE and the Ipsen sale.

As of March 31, 2023, we had unrestricted cash and cash equivalents of $19.4 million. We expect that our cash and cash equivalents as of March 31, 2023 will be sufficient to continue our operations beyond 2027, when we estimate the longest-term potential Ipsen milestone may be achieved.

As of March 31, 2023, we had an accumulated deficit of $547.9 million. Our net loss from our continuing operations was $0.3 million and $0.1 million for the three months ended March 31, 2023 and 2022, respectively. We do not expect to have any research and development expenses going forward. We do not expect to be profitable from our continuing operations in the future.

Financial Operations Overview

General and administrative expenses

General and administrative expenses consist primarily of stock-based compensation expenses, legal, intellectual property, business development, finance, information technology, corporate communications and investor relations. Other general and administrative expenses include costs for board of director's costs, insurance expenses, legal and professional fees, and accounting and information technology services fees.

Interest income

Interest income consists primarily of interest income associated with our money market fund.



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Critical Accounting Policies and Significant Judgments and Estimates

Our management's discussion and analysis of our financial condition and results of operations is based on our condensed consolidated financial statements, which we have prepared in accordance with the rules and regulations of the Securities and Exchange Commission, or the SEC, and generally accepted accounting principles in the United States, or GAAP. The preparation of these condensed consolidated financial statements requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosure of contingent assets and liabilities at the date of the financial statements, as well as the reported expenses during the reporting periods. We evaluate our estimates and judgments on an ongoing basis. We base our estimates on historical experience and on various other factors that we believe are reasonable under the circumstances, the results of which form the basis for making judgments about the carrying value of assets and liabilities that are not readily apparent from other sources. Our actual results may differ from these estimates under different assumptions or conditions.

Our critical accounting policies and the methodologies and assumptions we apply under them have not materially changed since March 9, 2023, the date we filed our Annual Report on Form 10-K for the year ended December 31, 2022. For more information on our critical accounting policies, refer to our Annual Report on Form 10-K for the year ended December 31, 2022.

Results of Operations

Comparison of the three months ended March 31, 2023 and 2022



                                        Three Months Ended
                                             March 31,
(in thousands)                          2023           2022
Operating expenses:
General and administrative expenses   $     586       $   577
Gain on sale of assets                     (139 )        (445 )
Total operating expenses                    447           132
Loss from operations                       (447 )        (132 )
Interest income                             176             -
Net loss                              $    (271 )     $  (132 )

General and administrative expenses

General and administrative expenses were $0.6 million for the three months ended March 31, 2023 and 2022, no significant changes during the three months ended March 31, 2023.

Gain on sale of assets

Gain on sale of assets was $0.1 million and $0.5 million for the three months ended March 31, 2023 and 2022, respectively, attributable to the sale of certain of our preclinical programs to third parties.

Interest income

Interest income was $0.2 million for the three months ended March 31, 2023 and nil for the three months ended March 31, 2022, primarily attributable to the increase of interest rate associated with our money market fund.

Liquidity and Capital Resources

Sources of liquidity

We have financed our operations through March 31, 2023 primarily through private placements of convertible preferred stock, collaborations, public offerings of our securities, secured debt financings, sales of our common stock, sales of our commercial and in-process research and development assets and exercise of stock options. As of March 31, 2023, we had unrestricted cash and cash equivalents of $19.4 million.




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Cash flows

The following table provides information regarding our cash flows for the three months ended March 31, 2023 and 2022:



                                                         Three Months Ended
                                                              March 31,
(in thousands)                                           2023           2022
Net cash used in operating activities                  $    (356 )     $  (354 )
Net cash provided by investing activities                    139           445
Net cash provided by financing activities                    179             -

Net (decrease) increase in cash and cash equivalents $ (38 ) $ 91






Operating activities

Cash used in operating activities of $0.4 million during the three months ended March 31, 2023 was primarily a result of our $0.3 million net loss from operations. The net loss was adjusted by $0.1 million gain on the sale of in-process research and development, a decrease in accounts payable, accrued expenses and other of $0.1 million and offset by a net decrease in prepaid expenses and other current assets of $0.2 million.

Cash used in operating activities of $0.4 million during the three months ended March 31, 2022 was primarily a result of our $0.1 million net loss from operations. The net loss was adjusted by a $0.4 million gain on the sale of in-process research and development assets and offset by a net decrease in prepaid expense and other assets of $0.2 million.

Investing activities

Cash provided by investing activities of $0.1 million and $0.4 million during the three months ended March 31, 2023 and 2022, respectively, was due to proceeds from the sale of in-process research and development.

Financing activities

Cash provided by financing activities of $0.2 million during the three months ended March 31, 2023 was due to proceeds from the exercise of stock options. There was no cash provided by or used in financing activities during the three months ended March 31, 2022.

Funding requirements

We have incurred significant expenses and operating losses to date. On May 30, 2019, we announced the completion of our review of strategic alternatives, following which our board of directors implemented a series of measures designed to extend our cash runway into 2027 and preserve our ability to capture the potential milestone payments resulting from the Ipsen sale. In connection with that announcement, we discontinued the discovery efforts on our remaining preclinical programs and implemented a reduction in headcount resulting in the termination of all remaining employees as of July 12, 2019. Our future capital requirements will depend on many factors, including:

the timing and amount of potential milestone payments related to ONIVYDE that we may receive from Ipsen;

the timing and amount of potential milestone payments that we may receive from Elevation;

the timing and amount of any special dividend to our stockholders that our board of directors may declare;

the timing and amount of general and administrative expenses required to continue to operate our company;

the extent to which we owe any taxes for current, future or prior periods, including as a result of any audits by taxing authorities;

the extent to which we invest in any future research or development activities of our product candidates;

the costs of preparing, filing and prosecuting patent applications and maintaining, enforcing and defending intellectual property-related claims;

the extent to which we acquire or invest in businesses, products and technologies; and

the costs associated with operating as a public company and maintaining compliance with exchange listing and SEC requirements.



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We do not believe that we will be able to raise a material amount of capital through the sale of our equity securities or debt financing. Rather, our goal is to judiciously expend our remaining cash until such time, if ever, as we receive additional milestone payments from Ipsen and Elevation. There can be no assurance as to the timing, terms or consummation of any financing. We do not have any committed external sources of funds. To the extent that we raise additional capital through the sale of equity or convertible debt securities, the ownership interest of our stockholders will be diluted, and the terms of these securities may include liquidation or other preferences that adversely affect the rights of our stockholders. Debt financing, if available, may involve agreements that include covenants limiting or restricting our ability to take specific actions, such as incurring additional debt, making capital expenditures or declaring dividends. If we raise additional funds through arrangements with third parties, we may have to relinquish valuable rights to our future revenue streams or product candidates.

Contractual Obligations and Commitments

There were no material changes to our contractual obligations and commitments described under Management's Discussion and Analysis of Financial Condition and Results of Operations in our Annual Report on Form 10-K for the year ended December 31, 2022, as filed with the SEC on March 9, 2023.

Off-Balance Sheet Arrangements

We did not have during the periods presented, and we do not currently have, any off-balance sheet arrangements, as defined under SEC rules.

Recent Accounting Pronouncements

See Note 7, "Recent Accounting Pronouncements," in the accompanying notes to the condensed consolidated financial statements for a full description of recent accounting pronouncements.




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