Item 8.01. Other Events.



As previously announced, on November 29, 2020, Sunesis Pharmaceuticals, Inc., a
Delaware corporation ("Sunesis"), entered into an Agreement and Plan of Merger
and Reorganization (the "Merger Agreement") with Viracta Therapeutics, Inc., a
Delaware corporation ("Viracta"), and Sol Merger Sub, Inc., a Delaware
corporation and direct wholly owned subsidiary of Sunesis ("Merger Sub"),
pursuant to which Merger Sub will merge with and into Viracta, with Viracta
surviving as a wholly owned subsidiary of Sunesis (the "Merger").

This Current Report on Form 8-K (this "Form 8-K") is being filed to update and
supplement the proxy statement/prospectus/information statement (the "proxy
statement/prospectus/information statement") (1) included in the Registration
Statement on Amendment No. 1 to Form S-4, File No. 333-251567 (the "Registration
Statement"), filed by Sunesis with the Securities and Exchange Commission (the
"SEC") on January 13, 2021 and declared effective by the SEC on January 14,
2021, (2) filed by Sunesis with the SEC as a prospectus on January 14, 2021, and
(3) mailed to Sunesis's stockholders commencing on or about January 15, 2021.
The information contained in this Form 8-K is incorporated by reference into the
proxy statement/prospectus/information statement. Terms used in this Form 8-K,
but not otherwise defined, shall have the meanings ascribed to such terms in the
proxy statement/prospectus/information statement.

Following the announcement of the Merger Agreement and as of the date of this Form 8-K, eight lawsuits have been filed by alleged stockholders of Sunesis challenging the Merger.



Sunesis, Viracta, and the other named defendants deny that they have violated
any laws or breached any duties to stockholders of Sunesis or Viracta and
believe that these lawsuits are without merit and that no supplemental
disclosure is required to the proxy statement/prospectus/information statement
under any applicable law, rule or regulation. Nevertheless, solely to eliminate
the burden and expense of litigation and to avoid any possible disruption to the
Merger that could result from further litigation, Sunesis is providing the
supplemental disclosures set forth in this Form 8-K. The supplemental
information contained in this Form 8-K should be read in conjunction with the
proxy statement/prospectus/information statement, which Sunesis urges you to
read in its entirety. Nothing in this Form 8-K shall be deemed an admission of
the legal necessity or materiality under applicable laws of any of the
disclosures set forth herein. To the extent that information in this Form 8-K
differs from, or updates information contained in, the proxy
statement/prospectus/information statement, the information in this Form 8-K
shall supersede or supplement the information in the proxy
statement/prospectus/information statement. The information contained in this
supplement speaks only as of February 11, 2021, unless the information
specifically indicates that another date applies. Except as otherwise described
in this Form 8-K or the documents referred to, contained in or incorporated by
reference in this Form 8-K, the proxy statement/prospectus/information
statement, the annexes to the proxy statement/prospectus/information statement
and the documents referred to, contained in or incorporated by reference in the
proxy statement/prospectus/information statement are not otherwise modified,
supplemented or amended.

If you have not already submitted a proxy for use at the Sunesis virtual special
meeting, you are urged to do so promptly. This Form 8-K does not affect the
validity of any proxy card or voting instructions that Sunesis stockholders may
have previously received or delivered. No action is required by any Sunesis
stockholder who has previously delivered a proxy or voting instructions and who
does not wish to revoke or change that proxy or voting instructions.



Supplemental Disclosures



All page references are to pages in the proxy statement/prospectus/information
statement, and terms used below, unless otherwise defined, have the meanings set
forth in the proxy statement/prospectus/information statement.

1.The following disclosure replaces the paragraphs under "Litigation Relating to
the Merger" on page 23 of the proxy statement/prospectus/information statement.
The modified text is underlined or omitted as strikethrough text below:

On January 8, 2021, a lawsuit was filed by a purported stockholder of Sunesis in
connection with the proposed merger between Sunesis and Viracta. The lawsuit was
brought as a putative class action and captioned James Mooney v. Sunesis
Pharmaceuticals, Inc., et al., No. 3:21-cv-00182 (N.D. Ca.) (the "Complaint").
The Mooney Ccomplaint names as defendants Sunesis, Merger Sub, Viracta and the
members of the Sunesis board. The Mooney Ccomplaint alleges claims for breaches
of fiduciary duty against the members of the Sunesis board, aiding and abetting
breaches of fiduciary duty against Sunesis, Viracta and Merger Sub, violations
of Section 14(a) of the Exchange Act and Rule 14a-9 promulgated thereunder
against all defendants, and violations of Section 20(a) of the Exchange Act
against the members of the Sunesis board. The plaintiff contends that the
proposed merger between Sunesis and Viracta is unfair and undervalues Sunesis,
and that the registration statement on Form S-4 filed on December 22, 2020
omitted or misrepresented material information regarding the proposed merger
between Sunesis and Viracta, rendering the registration statement false and
misleading. The Mooney



--------------------------------------------------------------------------------

Ccomplaint seeks injunctive relief, declaratory relief, rescission or rescissory damages, and an award of plaintiffs' costs, including attorneys' fees and expenses.





Additional complaints were filed against Sunesis and the Sunesis board on
January 14, 15, 16, 19, 21, and 29, 2021, and against Viracta and the Merger Sub
on January 16, 2021. The defendants believe the Ccomplaints is are without merit
and intend to vigorously defend against them it. Additional lawsuits may be
filed against Sunesis, Merger Sub, Viracta, and/or the Sunesis directors in
connection with the merger and the S-4, or the complaints described above may be
amended. For additional information about the complaints, see page 158 in the
section entitled "Litigation Relating to the Merger."



2.The following disclosure replaces the first full paragraph and following paragraph on page 34 of the proxy statement/prospectus/information statement. The modified text is underlined or omitted as strikethrough text below:



On January 8, 2021, a lawsuit was filed by a purported stockholder of Sunesis in
connection with the proposed Merger between Sunesis and Viracta. The lawsuit was
brought as a putative class action and captioned James Mooney v. Sunesis
Pharmaceuticals, Inc., et al., No. 3:21-cv-00182 (N.D. Ca.) (the "Complaint").
The Ccomplaint names as defendants Sunesis, Merger Sub, Viracta and the members
of the Sunesis board. For additional information about the complaints, see page
158 in the section entitled "Litigation Relating to the Merger."



Additional complaints were filed against Sunesis and the Sunesis board on
January 14, 15, 16, 19, 21, and 29, 2021, and against Viracta and the Merger Sub
on January 16, 2021. The Ccomplaints seeks injunctive relief, declaratory
relief, rescission or rescissory damages, and an award of plaintiffs' costs,
including attorneys' fees and expenses. Sunesis and Viracta, as well as the
other defendants, believe that the Ccomplaints is are without merit and intend
to vigorously defend against them it and any similar lawsuits that may be filed.
Sunesis and Viracta cannot predict the outcome of, or estimate the possible loss
or range of loss from, these matters. It is possible that additional, similar
lawsuits may be filed, or the Ccomplaints described above will be amended. If
this occurs, Sunesis and Viracta do not intend to announce the filing of each
additional similar complaint unless it contains allegations that are
substantially distinct from those described above.



3.The following disclosure replaces the sixth full paragraph on page 129 of the proxy statement/prospectus/information statement. The modified text is underlined or omitted as strikethrough text below:





Over the course of the strategic review activities from July 7, 2020 through
September 5, 2020, Sunesis, with the assistance of MTS Health Partners,
contacted, or had discussions with, sixteen companies regarding a potential a
merger or acquisition, executed confidential disclosure agreements ("CDAs") with
ten companies, and received from, or provided to, six companies preliminary
proposals. None of the CDAs included a standstill provision or a "don't ask,
don't waive" clause.


4.The following disclosure replaces the first paragraph on page 132 of the proxy statement/prospectus/information statement. The modified text is underlined below:



On October 7, 2020, at a special telephonic meeting, the Sunesis Board met in
consultation with Sunesis management and representatives of Cooley and MTS
Health Partners to discuss the status of discussions with Party E and Viracta,
as well as to provide an update on the status of any ongoing diligence on Party
A, Party B and Party C. In consideration of the large potential upside of Party
E's platform, the transaction terms included in the October 5, 2020 Term Sheet,
as well as the high probability of Party E closing a financing transaction in
the near term, the Sunesis Board decided to enter exclusive discussions with
Party E to pursue a potential merger transaction. The Sunesis Board also
discussed the Viracta proposal but determined that the negotiations with Viracta
were at an early stage and presented a lower probability of closing a
transaction. The Sunesis Board

therefore elected not to proceed with discussions with Viracta. Following the
Sunesis Board's resolution to enter into exclusivity with Party E, the Sunesis
management informed Viracta of the Sunesis Board's decision and halted all
ongoing due diligence. The Sunesis Board also discussed, in the event of a
reverse merger transaction, which member(s) of the Sunesis Board would remain on
the board following the closing of the transaction. The Sunesis Board did not at
this time conclude which director(s) or how many would remain on the board
following the closing of such a transaction and continued to consider this
question throughout the process.



5.The following disclosure is inserted after the first full paragraph on page 134 of the proxy statement/prospectus/information statement:

Following the filing of the initial Registration Statement on December 22, 2020, the Sunesis Board determined that Dr. Onetto would remain on the combined company's board of directors. This determination was based on her clinical

--------------------------------------------------------------------------------

expertise and experience, which the Sunesis Board believed would complement the Viracta board designees following the Closing.

6.The following disclosure replaces the first full paragraph on page 143 of the proxy statement/prospectus/information statement. The modified text is underlined or omitted as strikethrough text below:





As noted above, at the direction of Sunesis, MTS assumed that the only material
assets of Sunesis were its cash and any proceeds of monetization of the Day One
Agreement and the Equity Stake, that no other assets of Sunesis have any
material value and that Sunesis does not currently, and does not intend in the
future to, conduct any activity that may result in the generation of revenue
other than the receipt of royalties and/or proceeds from the Day One Agreement.
Sunesis management made this determination based on a number of factors,
including: (i) risks associated with SNS-510 and vecabrutinib becoming
commercially viable programs due to preclinical and clinical data produced to
date, (ii) the competitive landscape among BTK inhibitors and the inherent
technical risks of early stage programs, (iii) the substantial amounts of
financing that would be required to continue Sunesis's operations and the
development of its SNS-510 PDK1 inhibitor program if Sunesis were to remain an
independent company, and (iv) that financing ongoing operations through a
variety of potential transaction structures would be challenging in the current
environment. Sunesis therefore instructed MTS to assign meaningful value only to
Sunesis Net Cash, the Day One Agreement and the Equity Stake, and Sunesis's
management provided projections for a valuation of a potential monetization of
the Day One Agreement as well as an estimated monetization value of the Equity
Stake. In connection therewith Additionally, MTS was advised by Sunesis that the
Day One Agreement and the Equity Stake alone are not sufficient to support
Sunesis as a standalone entity going forward, and based on such direction from
Sunesis and with the consent of the Sunesis Board, MTS analyzed the relevant
intrinsic valuation of Sunesis solely using a liquidation analysis, which
includes the monetization of the foregoing assets to estimate a sum-of-the-parts
value in a potential liquidation. Correspondingly, MTS, reviewed and relied upon
the Sunesis Projections for purposes of a liquidation analysis to value Sunesis.



7.The following disclosure replaces the second full paragraph on page 144 of the proxy statement/prospectus/information. The modified text is underlined or omitted as strikethrough text below:





MTS calculated the present value of the cash flows to be generated by Viracta
during the period beginning on March 31, 2021 and ending on December 31, 2040
based on the Go-Forward Projections prepared by Sunesis's management. At the
direction of Sunesis, MTS conducted certain sensitivity analyses in connection
with this discounted cash flow analysis using ranges of: (i) revenue achievement
of 75% to 125%, as provided by Sunesis's management; (ii) cumulative regulatory
probability of success in lymphoma with respect to Viracta's lead asset
("Lymphoma Cumulative Probability of Success") of 20% to 40%, as provided by
Sunesis's management; and (iii) peak penetration of the addressable U.S.
lymphoma market ("U.S. Lymphoma Peak Penetration") equal to 25% to 45%, as
provided by Sunesis's management; as discounted back to March 31, 2021 based
upon a weighted average cost of capital of 11% to 13%, reflecting estimates of
Viracta's weighted average cost of capital, based upon MTS's analysis of the
cost of capital for Viracta's publicly traded comparable companies. The tables
below show the debt-to-total capital ratio, levered beta and unlevered beta for
each such comparable company and the summary of estimated Viracta's weighted
average cost of capital calculations as of November 25, 2020. For each such
sensitivity analysis, MTS also calculated the present value of cash flows to be
generated by Viracta using the midpoint of the ranges set forth above in this
paragraph.

        Publicly Traded Comparable Total Debt   Levered Beta Unlevered Beta
        Company                    / Total
                                   Capital
        Constellation              2.3%         1.37         1.34
        Pharmaceuticals
        Cardiff Oncology           0.0%         1.16         1.16
        Syros Pharmaceuticals      5.2%         1.12         1.07
        Calithera Biosciences      0.0%         1.50         1.50
        BerGenBio                  0.0%         0.82         0.82
        Verastem                   8.8%         1.20         1.12
        NuCana                     0.0%         1.31         1.31
        Corvus Pharmaceuticals     0.0%         0.95         0.95




                      Weight After-Tax Cost of Capital Contribution to WACC
       Debt Capital   2.0%   5.1%                              0.1%
       Equity Capital 98.0%  11.8%                            11.6%




--------------------------------------------------------------------------------



             WACC (rounded to the nearest whole percentage)     12.0%





8.The following disclosure replaces the first full paragraph on page 148 of the proxy statement/prospectus/information. The modified text is underlined below:





Pursuant to an engagement letter agreement, dated as of August 4, 2020, between
Sunesis and MTS Health Partners, L.P., Sunesis engaged MTS Health Partners, L.P.
to act as its financial advisor in connection with Sunesis's consideration of
certain potential merger and acquisition transactions or similar transactions.
As permitted by the terms of the engagement letter and pursuant to MTS Health
Partners, L.P.'s internal policies, MTS Securities, LLC, a wholly owned
subsidiary of MTS Health Partners, L.P., delivered the MTS Opinion. As
compensation for MTS Health Partners, L.P. and its affiliates' financial
advisory services, Sunesis paid a nonrefundable retainer fee of $100,000 in
connection with the execution of such engagement letter and paid an additional
fee of $400,000 for rendering the MTS Opinion in connection with the Sunesis
Board's consideration of the proposed transaction with Viracta, which fee was
not contingent upon the successful completion of the Merger or the conclusion
reached in the MTS Opinion. Upon the consummation of the Merger, Sunesis will be
obligated to pay to MTS Health Partners, L.P. a fee equal to approximately $2.0
million (up to $500,000 of which may be paid, at Sunesis's sole discretion, in
the form of Sunesis Common Stock), with all fees previously paid by Sunesis
pursuant to the engagement letter credited towards such amount, including the
fee paid by Sunesis upon delivery of the MTS Opinion. Sunesis has not yet
determined whether it plans to pay any of the fee owed MTS Health Partners, L.P.
in the form of Sunesis Common Stock, and this determination will be made at
Sunesis's discretion prior to Closing. In addition, Sunesis has agreed to
reimburse to MTS Health Partners, L.P. and its affiliates for their reasonable
out-of-pocket expenses incurred, and to indemnify MTS Health Partners, L.P. and
its related persons for certain liabilities that may arise, in each case, in
connection with any of the matters contemplated by the engagement letter.



9.The following disclosure replaces the fourth full paragraph and the two immediately following tables on page 150 of the proxy statement/prospectus/information statement. The modified text of the fourth full paragraph is underlined below:





The Go-Forward Projections are further adjusted for several additional
assumptions, including, among other things, development and regulatory
probability of success and expenses adjusted on the basis thereof. These
assumptions applied to the Preliminary Analysis and Go-Forward Projections were
based on Sunesis management's experience forecasting the commercialization of
pre-commercial products on a global scale.

Preliminary Analysis

($ amounts in millions)



            2021 2022 2023 2024  2025  2026  2027  2028  2029  2030  2031  

2032 2033 2034 2035 2036 2037 2038 2039 2040




Net Sales      -    -    -  $32  $243  $451  $630  $732  $801  $848  $898  $951 $1,007 $1,067 $1,130 $1,197 $1,268 $1,344 $1,424 $1,509
Cost of        -    -    -  (3)  (24)  (45)  (63)  (73)  (80)  (85)  (90)  (95)  (101)  (107)  (113)  (120)  (127)  (134)  (142)  (151)
Goods
Royalties      -    -    -  (0)   (4)   (7)   (9)  (11)  (12)  (13)  (13)  (14)   (15)   (16)   (17)   (18)   (19)   (20)   (21)   (23)
Payable
Royalties &   11    8    -   13    28    16    30    43    26    29    30    31     32     32     14     11      9      8      6      4
Milestone
Receivables
Gross         11    8    -   41   244   415   587   691   734   779   824   872    923    976  1,014  1,070  1,132  1,197  1,266  1,339
Profit
R&D         (31) (31) (31) (26)  (21)  (15)  (10)  (10)  (10)  (10)  (10)  (10)   (10)   (10)   (10)   (10)   (10)   (10)   (10)   (10)
SG&A         (9)  (8) (20) (24) (128) (203) (236) (220) (240) (254) (269) (285)  (302)  (320)  (339)  (359)  (380)  (403)  (427)  (453)
Operating   (28) (32) (51)  (9)    95   197   341   461   484   515   545   577    611    646    665    701    741    784    829    877
Income








Go-Forward Projections

($ amounts in millions)



            2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 

2033 2034 2035 2036 2037 2038 2039 2040



Net Sales      -    -    -  $10  $65 $112 $154 $174 $193 $204 $216 $229 $243 $257 $273 $289 $306 $325 $344 $365
Cost of        -    -    -  (1)  (7) (14) (19) (22) (24) (25) (27) (28) (30) (32) (34) (36) (38) (40) (43) (45)
Goods
Royalties      -    -    -  (0)  (1)  (2)  (3)  (3)  (4)  (4)  (4)  (4)  (5)  (5)  (5)  (5)  (6)  (6)  (6)  (7)
Payable
Royalties &   11    8    -    4    8    5    9   13    8    9    9    9    9   10    4    3    3    2    2    1
Milestone
Receivables
Gross         11    8    -   12   65  101  141  162  173  184  194  206  218  230  238  251  266  281  297  314
Profit (1)
R&D         (31) (31) (31) (10)  (6)  (5)  (3)  (3)  (3)  (3)  (3)  (3)  (3)  (3)  (3)  (3)  (3)  (3)  (3)  (3)




--------------------------------------------------------------------------------


SG&A        (9)   (8)  (20)   (9) (38) (61) (71) (66) (72) (76) (81) (85) (91) (96) (102) (108) (114) (121) (128) (136)
Operating  (28)  (32)  (51)   (7)   21   36   67   93   98  104  111  117  124  131   133   141   149   157   166   176
Income
Net        (28)  (32)  (51)   (7)   21   36   67   81   73   78   82   87   92   98    99   104   110   117   123   131
Income
(1)
Unlevered ($29) ($31) ($48) ($14)  $17  $33  $62  $77  $72  $77  $81  $86  $91  $96   $99  $103  $109  $115  $122  $129
Free Cash
Flow (2)


(1) Equal to operating income less taxes, which were assumed to equal 26%.



(2) Unlevered free cash flow is defined as operating income, less taxes, plus
depreciation and amortization, less capital expenditures and less changes in net
working capital.



10.The following disclosure replaces the last paragraph on page 150 (continuing
to the top of page 151) of the proxy statement/prospectus/information statement.
The modified text is underlined below:

For purposes of determining the liquidation value of Sunesis, Sunesis'
management provided MTS with the Sunesis Projections, which consisted of the
estimated values for the monetization of the Day One Agreement and Sunesis'
equity stake in a privately held company (the "Equity Stake") and estimated
Sunesis net cash before the monetization of the Day One Agreement and the Equity
Stake. Due to the preclinical and clinical data produced to date, the
competitive landscape among BTK inhibitors, the inherent technical risks of
early stage programs as well as the ability to receive milestones and royalties
due to development risk with vosaroxin, vecabrutinib, SNS-510 and vosaroxin were
not ascribed any value that would be material. Sunesis' management ascribed a
value of approximately $6.4 million to the Day One Agreement based on the
following assumptions: (i) gross revenue based on epidemiological build of
pediatric brain cancer population; (ii) a peak penetration rate of 30% in the
U.S.; and (iii) a 1.0x revenue multiplier applied to U.S. sales to represent
rest of world sales. Sunesis' management also considered the fact that the Day
One Agreement included a $2.0 million upfront payment and up to $57.0 million in
potential pre-commercialization, event-based milestone payments and mid-single
digit percentage royalty payments on future sales of TAK-580, when and if
approved and commercialized. In addition, the Equity Stake was valued at
$581,100 by Sunesis' management after applying a discount rate to account for
the illiquidity of the equity.



11.The following disclosure replaces the second full paragraph on page 155 of the proxy statement/prospectus/information statement. The modified text is underlined below:





On December 16, 2020, Mr. Misfeldt tendered his resignation as an officer and
director of Sunesis, effective as of December 31, 2020. Under the Retention
Program and a consulting agreement with Sunesis, subject to his continued
service through the closing of the Merger, Mr. Misfeldt will be eligible for an
extension of the post-termination exercise period for all options held by him
with an exercise price below $10.00 per share until the earlier of the original
expiration date of such option or 24 months following the closing of the Merger.
Mr. Misfeldt resigned in order to pursue another opportunity. Mr. Misfeldt's
resignation was not the result of any disagreement with Sunesis on any matter,
including relating to Sunesis's finances, accounting, operations, practices or
policies.



12.The following disclosure replaces the last paragraph on page 158 of the proxy
statement/prospectus/information statement and the carried over and first full
paragraph on page 159 of the proxy statement/prospectus/information statement.
The modified text is underlined or omitted as strikethrough text below:



On January 8, 2021, a lawsuit was filed by a purported stockholder of Sunesis in
connection with the proposed merger between Sunesis and Viracta. The lawsuit was
brought as a putative class action and captioned James Mooney v. Sunesis
Pharmaceuticals, Inc., et al., No. 3:21-cv-00182 (N.D. Cal.) (the "Complaint").
The Mooney Ccomplaint names as defendants Sunesis, Merger Sub, Viracta and the
members of the Sunesis board. The Mooney Ccomplaint alleges claims for breaches
of fiduciary duty against the members of the Sunesis board, aiding and abetting
breaches of fiduciary duty against Sunesis, Viracta and Merger Sub, violations
of Section 14(a) of the Exchange Act and Rule 14a-9 promulgated thereunder
against all defendants, and violations of Section 20(a) of the Exchange Act
against the members of the Sunesis board. The plaintiff contends that the
proposed merger between Sunesis and Viracta is unfair and undervalues Sunesis,
and that the registration statement on Form S-4 filed on December 22, 2020
omitted or misrepresented material information regarding the proposed merger
between Sunesis and Viracta, rendering the registration statement false and
misleading. The Mooney Ccomplaint seeks injunctive relief, declaratory relief,
rescission or rescissory damages, and an award of plaintiffs' costs, including
attorneys' fees and expenses.



Additional complaints were filed against Sunesis and the Sunesis board on
January 14, 15, 16, 19, 21, and 29, 2021 (captioned Hajdini v. Sunesis
Pharmaceuticals, Inc., et al., No. 1:21-cv-00359 (S.D.N.Y.); Blomquist v.
Sunesis Pharmaceuticals, Inc., et al., No. 21-cv-00225 (E.D.N.Y.); Ciccotelli v.
Sunesis Pharmaceuticals, Inc., et al., No. 1:21-cv-00406 (S.D.N.Y.); Zivan v.
Sunesis Pharmaceuticals, Inc., et al., No. 1:21-cv-00478 (S.D.N.Y.); Rond v.
Sunesis Pharmaceuticals, Inc., et al., No. 1:21-cv-00531 (S.D.N.Y.); Wheeler v.
Sunesis Pharmaceuticals, Inc., et al., No. 3:21-cv-00511 (N.D. Cal.); Kubicek v.
Sunesis Pharmaceuticals, Inc., et al., No. 3:21-cv-00710 (N.D. Cal.); and Sabina
v. Sunesis Pharmaceuticals, Inc., et al., No. 1:21-cv-00860 (S.D.N.Y.)). The
Ciccotelli and Sabina complaints additionally assert claims against Viracta and
the Merger Sub. All of the complaints allege violations of Section 14(a) and
Section 20(a) of the



--------------------------------------------------------------------------------


Exchange Act. The Hajdini complaint additionally asserts a claim for breach of
fiduciary duty against the board and interim CEO of Sunesis. All complaints seek
injunctive and declaratory relief.



The defendants believe the Ccomplaints is are without merit and intend to vigorously defend against them it. Additional lawsuits may be filed against Sunesis, Merger Sub, Viracta, and/or the Sunesis directors in connection with the merger and the S-4.

Cautionary Statement Regarding Forward-Looking Statements



This Current Report on Form 8-K contains "forward-looking" statements within the
meaning of the Private Securities Litigation Reform Act of 1995, including,
without limitation, statements regarding expected timing, completion and effects
of the proposed Merger, and other statements that are not historical facts.
Sunesis's expectations and beliefs regarding these matters may not materialize.
Sunesis's actual results and the timing of events could differ materially from
those anticipated in such forward-looking statements as a result of these risks
and uncertainties, which include, without limitation, risks relating to the
ability of the parties to consummate the proposed Merger, satisfaction of
closing conditions precedent to the consummation of the proposed Merger,
potential delays in consummating the Merger, and the ability of Sunesis to
timely and successfully achieve the anticipated benefits of the Merger.

These risks and uncertainties may be amplified by the COVID-19 pandemic, which
has caused significant economic uncertainty. If any of these risks materialize
or underlying assumptions prove incorrect, actual results could differ
materially from the results implied by these forward-looking statements.
. . .

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