United States securities and exchange commission logo





                            February 15, 2024

       Shahraab Ahmad
       Chairman and Chief Executive Officer
       Atlantic Coastal Acquisition Corp. II
       6 St Johns Lane, Floor 5
       New York, NY 10013

                                                        Re: Atlantic Coastal
Acquisition Corp. II
                                                            Registration
Statement on Form S-4
                                                            Filed January 19,
2024
                                                            File No. 333-276618

       Dear Shahraab Ahmad:

                                                        We have reviewed your
registration statement and have the following comments.

              Please respond to this letter by amending your registration
statement and providing the
       requested information. If you do not believe a comment applies to your
facts and circumstances
       or do not believe an amendment is appropriate, please tell us why in
your response.

              After reviewing any amendment to your registration statement and
the information you
       provide in response to this letter, we may have additional comments.

       Registration Statement on Form S-4, filed January 19. 2024

       Cover Page

   1.                                                   Please disclose the
ownership interests in the combined company of (i) the Sponsor and its
                                                        affiliates and (ii)
ACAB's other current stockholders.
       Questions and Answers About the Business Combination, page 5

   2.                                                   Please revise this
section as well as the Summary section, where appropriate, to include a
                                                        discussion of the
combined company's liquidity position following the Business
                                                        Combination. In your
revisions, please describe and quantify the payments required to be
                                                        made by the combined
company following the Business Combination, including
                                                        transaction expenses,
as well as any other debt obligations of the combined company,
                                                        including unpaid
license agreement obligations. Please also include amounts that may
                                                        become payable pursuant
to legal proceedings or other disputes. In your discussion, please
                                                        include disclosure
regarding the combined company's liquidity position if the Available
                                                        Closing Cash condition
is waived. Please also reflect your disclosure elsewhere in the
 Shahraab Ahmad
FirstName  LastNameShahraab    Ahmad
Atlantic Coastal Acquisition Corp. II
Comapany15,
February   NameAtlantic
             2024         Coastal Acquisition Corp. II
February
Page 2 15, 2024 Page 2
FirstName LastName
         registration statement indicating that there is substantial doubt as
to Abpro's ability to
         continue as a going concern within one year after September 30, 2023
and describe how
         far Abpro expects to reach in development with the proceeds from the
Business
         Combination at the various redemption levels detailed in your
sensitivity analysis.
3.       Please revise to include a Q&A describing the post-business
combination ownership of
         the combined company. In your revisions, please include a sensitivity
analysis disclosing
         ownership percentages at various redemption levels. Please also revise
to disclose all other
         possible sources and extent of dilution that stockholders who elect
not to redeem their
         shares may experience in connection with the Business Combination.
Provide disclosure
         of the impact of each significant source of dilution including the
amount of equity held by
         the Sponsor, earn-out shares, convertible securities, including
warrants retained by
         redeeming shareholders, at each of the redemption levels detailed in
your sensitivity
         analysis, including any needed assumptions.
4.       Please revise this section to include a Q&A disclosing the management
and directors of
         the post-business combination company.
What Will Abpro Stockholders Receive in the Business Combination?, page 5

5.       Please revise here to include ACAB's pre-money equity valuation of
Abpro in the
         Business Combination and the amount of stock that will be issued in
relation to the
         valuation. Please also revise to discuss the Earn-out Shares.
How is the Payment of the Deferred Underwriting Commissions...?, page 10

6.       Please revise your response to this question to clarify if Cantor
provided a reason for
         reducing its underwriting fees and, if so, what that reason was.
Please also clarify if
         Cantor is currently acting, or previously acted, as a financial
advisor to ACAB in
         connection with the Business Combination.
Do Any of ACAB's Directors or Officers Have Interests..., page 12

7.       Please quantify the aggregate dollar amount and briefly describe the
nature of what the
         Sponsor and its affiliates have at risk that depends on completion of
a business
         combination. Include the current value of securities held, loans
extended, fees due and
         out-of-pocket expenses for which the sponsor and its affiliates are
awaiting
         reimbursement. Provide similar disclosure for the company   s officers
and directors, if
         material.
Summary, page 16

8.       Please revise the Summary to include an organizational chart depicting
the parties to the
         transaction both prior to and after the Business Combination.
9.       Please revise this section to disclose the current status of the PIPE
Financing.
 Shahraab Ahmad
FirstName  LastNameShahraab    Ahmad
Atlantic Coastal Acquisition Corp. II
Comapany15,
February   NameAtlantic
             2024         Coastal Acquisition Corp. II
February
Page 3 15, 2024 Page 3
FirstName LastName
Interests of ACAB's Directors and Executive Officers in the Business
Combination , page 18

10.      We note your statement indicating that certain of ACAB's officers and
directors
         collectively own a material interest in the Sponsor. Please revise to
disclose the officers
         and directors who own the material interest and the nature of this
interest.
Other Agreements, page 23

11.      Please revise to disclose the number of shares that will be covered by
(i) lock-up
         agreements and (ii) registration rights agreements, in each case,
following the
         consummation of the Business Combination.
Risk Factors
If we are unable to obtain or protect intellectual property rights..., page 50

12.      Please revise this risk factor to disclose which of your product
candidates and
         technologies are covered by march-in rights.
We have concluded that our disclosure controls and procedures were not
effective..., page 72

13.      Please revise this risk factor to disclose the nature of the material
weaknesses that existed
         in Abpro's internal control over financial reporting as of December
31, 2022 and to
         identify the remedial actions taken, if any, to address the material
weaknesses.
If we are deemed to be an investment company under the Investment Company
Act..., page 73

14.      We note your disclosure on page 74 that the assets in the Trust
Account were previously
         invested in securities, including U.S. Government securities or shares
of money market
         funds meeting certain conditions under Rule 2a-7 of the Investment
Company Act. Please
         also disclose that if you are found to have been operating as an
unregistered investment
         company, you may be required to change or wind down your operations.
Also include
         disclosure with respect to the consequences to investors if you are
required to wind down
         your operations as a result of this status, such as the loss of the
investment opportunity in
         a target company, any price appreciation in the combined company and
any warrants,
         which would expire worthless.
We have identified ineffective disclosure controls and procedures that..., page
75

15.      We note the discussion that "disclosure controls and procedures were
not effective as of
         September 30, 2023 due to the Company not filing timely tax returns
and utilizing cash
         withdrawn from the trust account for tax obligations for operating
purposes." Please revise
         to clarify whether such situation constitutes a material weakness,
whether remedial actions
         have begun and, if so, the nature and extent of such actions.
The Proposed Charter and the Post-Combination Company's bylaws will provide...,
page 98

16.      Please revise this risk factor to disclose the possibility that your
exclusive forum provision
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FirstName  LastNameShahraab    Ahmad
Atlantic Coastal Acquisition Corp. II
Comapany15,
February   NameAtlantic
             2024         Coastal Acquisition Corp. II
February
Page 4 15, 2024 Page 4
FirstName LastName
         may result in increased costs for investors to bring a claim.
Unaudited Pro Forma Condensed Combined Financial Information
Description of the Business Combination, page 102

17.      We note the discussion here and on page 103 where you discuss the
components of the
         Business Combination Consideration. Please revise to provide your
calculation of the total
         purchase price consideration hereunder or in the accompanying notes to
the pro forma
         financial statements.
Other Related Events in Connection with the Business Combination, page 103

18.      We note the disclosure that the PIPE Investment is contemplated to
take place in
         connection with the Business Combination. Please revise this
discussion to describe how
         management has concluded the PIPE Investment is probable and
appropriate for inclusion
         under Rule 11-02(a)(6)(i)(A) of Regulation S-X.
Transaction Accounting Adjustments to Unaudited Pro Forma Condensed Combined
Balance
Sheet as of September 30, 2023, page 109

19.      It appears adjustment (7) refers to Cantor's Reduced Deferred Fee as
further described on
         pages 296-297. If so, please revise this disclosure to more fully
explain the facts and
         circumstances surrounding the settlement or to provide a cross
reference to the applicable
         section explaining such facts and circumstances.
Management of ACAB
Executive Compensation, page 153

20.      Please revise to provide executive compensation information for the
fiscal year ended
         December 31, 2023.
Information About Abpro
Overview, page 165

21.      You disclose that you received "an upfront payment and an equity
investment, each in the
         single digit millions of dollars, in connection with" the
collaboration agreement with
         Celltrion. Please disclose the exact amount of the upfront payment and
equity investment
         received. Clarify here and in the footnotes on pages F-58 and F-84
whether the "upfront
         payment" is the same as the "first milestone" of $2.0 million achieved
as disclosed in
         those footnotes. Finally, revise the footnotes to specifically address
the nature and extent
         of the equity investment.
22.      Please remove your statements here and throughout that (i) ABP-102 is
expected to have
         peak annual revenue of approximately $800 million, (ii) that ABP-201
is expected to have
         peak annual revenue of approximately $900 million and (iii) the
risk-adjusted present
         value of future revenue from both assets combined is approximately
$1.2 billion and the
 Shahraab Ahmad
FirstName  LastNameShahraab    Ahmad
Atlantic Coastal Acquisition Corp. II
Comapany15,
February   NameAtlantic
             2024         Coastal Acquisition Corp. II
February
Page 5 15, 2024 Page 5
FirstName LastName
         peak risk-adjusted revenue is expected to be approximately $570
million as
         these statements are premature given Abpro's current stage of
development.
23.      We note your disclosure indicating that Abpro granted Abpro Bio
exclusive development
         and commercialization rights to ABP-201 "in certain countries
primarily in Asia and the
         Middle East." Please revise to disclose the countries where Abpro Bio
has exclusive
         development and commercialization rights.
24.      We note your statements here and on page 173 that as "validation" of
Abpro's platform,
         Abpro's technology has been used to generate high quality antibodies
for global
         pharmaceutical and research institutions. Please revise to clarify if
you are referring to
         antibodies other than the four candidates that appear in Abpro's
pipeline table. To the
         extent that you are referencing additional antibodies, please identify
these antibodies and
         clarify if any of them are currently being evaluated in clinical
trials.
ABP-102: Next generation T-cell engager targeting HER2 and CD3 for HER2+ solid
tumors,
page 166

25.      We note your statement that ABP-102 has the potential to provide
longer lasting or even
         curative results. Please revise to provide the basis for this
statement. To the extent that this
         statement is based on management's belief, please so state.
26.      We note your statement that Abpro has designed ABP-102 as a "highly
potent"
         therapeutic agent. Please revise to remove any statements that
indicate ABP-102 or
         Abpro's other product candidates are or will be potent or efficacious.
In that regard, we
         also note your statements on page 168 indicating that ABP-201 could
potentially provide
         "increased efficacy over current agents" and on page 176 that your
product candidate has
         "enhanced potential potency." You may discuss the results of Abpro's
preclinical
         studies without claiming potency or efficacy.
ABP-201: Ligand trap targeting VEGF and ANG-2 for vascular diseases of the eye,
page 168

27.      Please revise this section to reflect your disclosure elsewhere in the
registration statement
         that Abpro in-licensed certain IP rights relating to ABP-201 from
MedImmune Limited
         and that Abpro is currently in breach of the license agreement.
Our Pipeline, page 169

28.      Please revise the pipeline table so that there are no more than two
preclinical columns.
         Please also revise to include separate Phase 1, Phase 2 and Phase 3
columns.
Our Strategy, page 169

29.      We note your statement that Abpro's antibody platforms and approach
overcome certain
         of the limitations associated with traditional methods of creating and
validating
         antibodies. Please revise to clarify, if true, that you have yet to
(i) produce antibodies the
         scale needed for clinical trials or commercialization and (ii)
evaluate any of your product
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FirstName  LastNameShahraab    Ahmad
Atlantic Coastal Acquisition Corp. II
Comapany15,
February   NameAtlantic
             2024         Coastal Acquisition Corp. II
February
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         candidates in a patient.
30.      We note your statements that Abpro plans initiate clinical trials of
ABP-102 and ABP-201
         in the second half of 2025. Please revise to clarify what steps, if
any, Abpro needs to
         complete prior to initiating clinical trials for these product
candidates. In your revisions,
         please clarify whether Abpro has held pre-IND meetings or otherwise
communicated with
         the FDA or applicable foreign regulators regarding its current product
candidates.
DiversImmune  : Our antibody discovery platform , page 172

31.      Please revise to provide support for your statement that Abpro is
using its platform to
         create an "industry-leading" collection of building blocks. To the
extent this claim is
         based on management's belief, please so state.
Key advantages of our antibody technology platforms, page 174

32.      Please revise your disclosure in the second bullet of this section to
clarify, if true, that any
         product candidate developed with Abpro's platforms will still be
subject to clinical trial
         requirements prior to approval and that Abpro cannot accelerate
clinical trials.
Advantages of TetraBi antibodies over CAR T therapy, page 177

33.      Please revise throughout this section to clarify, if true, that Abpro
has yet to observe any
         advantages of TetraBi antibodies in a clinical trial and that TetraBi
antibodies have not yet
         received marketing approval.
Potential competitive advantages of ABP-102 versus approved anti-HER2
therapies, page 178

34.      Please revise your graphic on page 179 to remove any implication that
ABP-102 will be
         found to be safe or effective and to remove claims that it will be
safer or more effective
         than existing approved therapies. Please similarly revise your graphic
on page 185.
Potential benefits of ABP-201 in ophthalmology, page 186

35.      Please revise this section to remove statements or implications that
ABP-201 will
         demonstrate increased efficacy relative to approved therapies.
In-licensing agreements
AstraZeneca, page 191

36.      We note your disclosure that Abpro is obligated to pay tiered
high-single to low "double-
         digit" percentage royalties pursuant to its agreement with
AstraZeneca. Please revise so
         that the potential royalty range does not exceed 10 percentage points.
NJCTTQ, page 193

37.      We note your disclosure that Abpro entered into a collaboration
agreement in January
         2019 with NJCTTQ and that the agreement had an initial five year term.
Please revise to
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FirstName  LastNameShahraab    Ahmad
Atlantic Coastal Acquisition Corp. II
Comapany15,
February   NameAtlantic
             2024         Coastal Acquisition Corp. II
February
Page 7 15, 2024 Page 7
FirstName LastName
         disclose whether the agreement was renewed. Please also clarify
whether any of the
         product candidates or technologies discussed elsewhere in the
prospectus are subject to
         this agreement.
Employees, page 206

38.      You disclose that as of December 2023 you have 21 full-time employees
and one part-
         time employee. The risk factor on page 45 states there are 22
full-time employees. Please
         revise as necessary.
Abpro Management's Discussion and Analysis of Financial Condition and Results
of Operations
Overview, page 208

39.      Please remove your statement that Abpro's antibodies are potentially
"best-in-class" as this
         statement appears to be premature given Abpro's current stage of
development. You may
         state that Abpro's antibodies are differentiated from other antibody
product candidates, if
         true.
Results of Operations, page 209

40.      You state on page 209 that research and development expenses decreased
"primarily due
         to a decrease of $4.9 million in research and development costs
associated with the
         research programs related to SARS-CoV-2 recognized during the nine
months ended
         September 30, 2022". On page 210, you indicate that the increase in
research and
         development expenses of $1.1 million during 2022 was "primarily due to
the increase in
         outsourced research and development services costs of $1.8 million
associated with the
         research programs related to SARS-CoV-2." Please revise to clarify to
which "research
         programs related to SARS-CoV-2" you refer, as we note the following
disclosures:
             The pipeline does not appear to include a candidate/program
related to SARS-CoV-
              2/COVID (page 169);
             "Abpro seeks to develop COVID antibodies" (page 190);
             The Mabwell License Agreement resulted in development activities
that were
              "immaterial to the condensed consolidated financial statements"
as of September 30,
              2023 (page F-60) and as of December 31, 2022 (page F-87); and
             You recorded $0 and $200 as research and development expenses as
of September
              30, 2023 (page F-61) and December 31, 2022 (page F-88),
respectively, pursuant to
              the VAZYME License Agreement.
41.      Please revise to provide more detail for your research and development
expenses for each
         period presented, including but not limited to, by product candidates
and/or by indication
         or program, as well as by the nature of the expenses.
Liquidity, Capital Resources and Going Concern, page 211

42.      Please revise this section to disclose how far Abpro expects to reach
in development with
         the proceeds from the Business Combination. In your revisions, please
discuss the various
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FirstName  LastNameShahraab    Ahmad
Atlantic Coastal Acquisition Corp. II
Comapany15,
February   NameAtlantic
             2024         Coastal Acquisition Corp. II
February
Page 8 15, 2024 Page 8
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         possible redemption levels and how they may impact on the combined
company's future
         liquidity. Please also revise to disclose the amount of Abpro's
aggregate indebtedness, if
         any, as of the most recent practicable date.
Background of the Business Combination, page 231

43.      Please revise this section to disclose the valuation ascribed to Abpro
in the Business
         Combination. In your revisions, please also describe the negotiations
related to Abpro's
         valuation and whether ACAB's management and/or board of directors used
any qualitative
         or quantitative metrics to formulate or support Abpro's valuation.
44.      We note your disclosure on page 237 indicating that Calabrese will be
entitled to a fee for
         its role as a financial consultant to ACAB. Please revise the
Background of the Business
         Combination section to disclose the role that Calabrese played in the
negotiation of the
         Business Combination.
45.      Please revise this section to describe negotiations related to the
PIPE Financing as well as
         the current status of the PIPE Financing.
Recommendation of the ACAB Board and Reasons for the Business Combination, page
234

46.      Please revise the "Attractiveness Compared to Industry Peers"
paragraph to disclose the
         precedents that were used in the analysis. To the extent that ACAB's
board considered a
         comparable company analysis in making its decision, please present
this analysis in the
         proxy statement/prospectus. Similarly revise the "Financial Condition"
paragraph to
         disclose the mergers and acquisitions considered.
Potential Purchases of Public Shares, page 239

47.      We note your statements that your Sponsor, directors, officers,
advisors or any of their
         respective affiliates may purchase public shares in
privately-negotiated transactions. We
         further note your disclosure that these purchases may be effected at
purchase prices that
         are in excess of the per share pro rata portion of the Trust Account
and that the purpose of
         any such purchases could be to vote shares in favor of the Business
Combination or satisfy
         a closing condition in the Business Combination Agreement. Please
provide your analysis
         on how such purchases comply with Rule 14e-5. To the extent that you
are relying on
         Tender Offer Compliance and Disclosure Interpretation 166.01 (March
22, 2022),
         available on our public website, please provide an analysis regarding
how it applies to
         your circumstances. Revise your disclosure here and throughout as
appropriate for
         consistency.
Abrpro Financial Statements
Note 7. Commitments and Contingencies, page F-62

48.      You indicate that $833,000 and $354,000 was accrued for within
accounts payable as of
         September 30, 2023, related to the settlement with the CRO vendor and
"potential
 Shahraab Ahmad
Atlantic Coastal Acquisition Corp. II
February 15, 2024
Page 9
       litigation related to disputed invoices with vendors", respectively. You
also disclose there
       was no exposure to loss in excess of the amounts that have been accrued
as of that date.
       Please revise to address whether any amounts related to the MSK
settlement aggregating
       $1.2 million as discussed on page 207 have been accrued for or disclose
why they have
       not been accrued.
49.    We note the risk factor disclosure on page 39 of the license agreement
with
       MedImmune/AstraZeneca which provided for a research plan with target
dates for an IND
       application (July 2021) and Phase II commencement (December 2022).
However, we
       note these target dates were not met, which gives MedImmune/AstraZeneca
a termination
       right. Please revise to quantify the potential impact of this right
should
       MedImmune/AstraZeneca so terminate.
        We remind you that the company and its management are responsible for
the accuracy
and adequacy of their disclosures, notwithstanding any review, comments, action
or absence of
action by the staff.

       Refer to Rules 460 and 461 regarding requests for acceleration. Please
allow adequate
time for us to review any amendment prior to the requested effective date of
the registration
statement.

       Please contact Jenn Do at 202-551-3743 or Kevin Kuhar at 202-551-3662 if
you have
questions regarding comments on the financial statements and related matters.
Please contact
Tamika Sheppard at 202-551-8346 or Alan Campbell at 202-551-4224 with any other
questions.



                                                             Sincerely,
FirstName LastNameShahraab Ahmad
                                                             Division of
Corporation Finance
Comapany NameAtlantic Coastal Acquisition Corp. II
                                                             Office of Life
Sciences
February 15, 2024 Page 9
cc:       Stephen C. Ashley, Esq.
FirstName LastName