Sec Form 13G Filing - UBS Group AG filing for PIMCO CORPORATE & INCOME OPPORTUNITY FUND (PTY) - 2023-10-05

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

Under the Securities Exchange Act of 1934

(Amendment No.7)
PIMCO Corporate & Income Opportunity Fund

(Name of Issuer)
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Auction Preferred Stock

(Title of Class of Securities)
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 72201B200
 72201B309
 72201B408
 72201B507
 72201B606
(CUSIP Number)

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Sep 18,2023
(Date of Event Which Requires Filing of this Statement)
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Check the appropriate box to designate the rule pursuant to
which this Schedule is filed:

/X/ Rule 13d 1(b)
/ / Rule 13d 1(c)
/ / Rule 13d 1(d)

*The remainder of this cover page shall be filled out for a
reporting person's initial filing on this form with respect
to the subject class of securities, and for any subsequent
amendment containing information which would alter the
disclosures provided in a prior cover page.
The event triggering notification is due
to shares tendered during the tender offer,
which expired on
18th Sep, 2023.


CUSIP No. -  72201B200, 72201B309, 72201B408, 72201B507, 72201B606




1.   Names of reporting persons

UBS Group AG, for the benefit and on behalf
of UBS Securities LLC and UBS Financial Services Inc.
,two-wholly owned subsidiaries of UBS AG to which UBS AG
has delegated portions of its performance obligations
with respect to the Auction Rate Securities Rights issued
by UBS AG to certain clients and pursuant to
which the securities reported herein have
been purchased from such clients.


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2.   Check the appropriate box if a member of a group
a  / /
b  / /   See Item 8 of attached schedule
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3.  SEC use only
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4.  Citizenship or place of organization

Switzerland
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Number of shares beneficially owned by each reporting person with:

Number of       5.  Sole Voting Power 	      0
Shares Bene-    6.  Shared Voting Power       3242
ficially        7.  Sole Dispositive Power    0
Owned by Each   8.  Shared Dispositive Power  3242
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9.  Aggregate Amount Beneficially Owned by Each Reporting Person:

3242

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10. Check if the aggregate amount in Row (9) excludes certain shares
(see instructions)

Shares / /

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11.  Percent of class represented by amount in Row (9)

94.77%

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12.  Type of reporting person (see instructions)
BK

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These amounts reflect UBS Group AGs combined holdings
in the series of auction preferred stock of the issuer
identified by the CUSIP numbes(s)set forth on the
cover page of this Schedule 13G.
This calculation reflects a fraction the numerator of which
is the total set forth in Item 9 of this cover page and the
denominator of which is the aggregate amount of auction preferred stock
of all series identified in Item 2(e)of this Schedule 13G,
which latter amount is treated herein as a single class of securities.

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Item 1(a) Name of issuer:

PIMCO Corporate & Income Opportunity Fund
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Item 1(b) Address of issuer's principal executive offices:

PIMCO Corporate & Income Opportunity Fund
1633 Broadway
New York, NY 10019

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2(a) Name of person filing:
UBS Group AG
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2(b) Address or principal business office or, if none, residence:

UBS Group AG
Bahnhofstrasse 45
ZURICH V8 CH-8001
Zurich, Switzerland

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2(c) Citizenship:
Switzerland
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2(d) Title of class of securities:

Auction Preferred Stock
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2(e) CUSIP No.:72201B200, 72201B309, 72201B408, 72201B507, 72201B606


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Item 3.	If this statement is filed pursuant to Sections
240.13d 1(b) or 240.13d 2(b) or (c), check whether the person
filing is a:
(a) / /	Broker or dealer registered under section 15 of the
Act (15 U.S.C. 78o);
(b) /X /Bank as defined in section 3(a)(6) of the Act
(15 U.S.C. 78c);
(c) / /	Insurance company as defined in section 3(a)(19) of
the Act (15 U.S.C. 78c);
(d) / /	Investment company registered under section 8 of the
Investment Company Act of 1940 (15 U.S.C 80a 8);
(e / /	An investment adviser in accordance with Section
240.13d 1(b)(1)(ii)(E);
(f) / /	An employee benefit plan or endowment fund in
accordance with Section 240.13d 1(b)(1)(ii)(F);
(g) // A parent holding company or control person in
accordance with Section 240.13d 1(b)(1)(ii)(G);
(h) / / A savings associations as defined in Section 3(b)
of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i) / /	A church plan that is excluded from the definition
of an investment company under section 3(c)(14) of the
Investment Company Act of 1940 (15 U.S.C. 80a 3);
(j) / /	A non-U.S. institution in accordance with
Section 240.13d 1(b)(1)(ii)(J);
(k) / /	Group, in accordance with Section
240.13d 1(b)(1)(ii)(K).
If filing as a non-U.S. institution in accordance with
Section 240.13d  1(b)(1)(ii)(J), please specify the type of
institution: ________________________________

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Item 4.	Ownership

Items 5-11 of the cover page and Item2(e)above are incorporated
 by reference in our response to this Item 4
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Item 5.	Ownership of 5 Percent or Less of a Class.
If this statement is being filed to report the fact that
as of the date hereof the
reporting person has ceased to be the beneficial owner of more than
5 percent of the class of securities, check the following / /.
Dissolution of a group requires a response to this item.
Item 6.Ownership of More than 5 Percent on Behalf of
Another Person.See the final sentence in Item 7 below,
which is incorporated by referenced into this Item 6.

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Item 7.Identification and Classification of the Subsidiary
Which Acquired the Security Being Reported on by the Parent Holding
Company or Control Person.
This statement on Schedule 13G is being filed by UBS Group AG, for
the benefit and on behalf of UBS Securities LLC and UBS Financial
Services Inc., two-wholly owned subsidiaries of UBS AG to which UBS
AG has delegated portions of its performance obligations with respect
to the Auction Rate Securities Rights issued by UBS AG to certain
clients and pursuant to which the securities reported herein have
been purchased from such clients.


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Item 8. Identification and Classification of Members of the Group.
N/A
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Item 9. Notice of Dissolution of Group.
N/A
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Item 10.	Certifications
By signing below I certify that,to the best of my knowledge and belief,
the securities referred to above were not acquired
 and are held for the purpose
of or with the effect of changing or influencing the control of the issuer
of the securities and were not acquired and are not held in connection
with or as a participant in any transaction having that purpose or effect
other than activities solely in connection with a nomination under
Section 240(sub section).14a-11.

Signatures

After reasonable inquiry and to the best of my knowledge and
belief, I certify that the information set forth in this statement
is true, complete and correct.


Date: 10/05/2023

Signature: /s/
Name: Andrew Johnson
Title: Director

Date:  10/05/2023

Signature: /s/Jignesh Doshi
Name: Jignesh Doshi
Title: Managing Director