UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 24F-2

Annual Notice of Securities Sold

Pursuant to Rule 24F-2

1. Name and address of Issuer:

Pioneer Series Trust XI

60 State Street

Boston, MA 02109-1820

2. The name of each series or class of funds for which this Form is

being filed (If the Form is being filed for all series and classes of

securities of the issuer, check the box but do not list series or

classes): [X]

3. Investment Company Act File Number: 811-01835

Securities Act File Number: 002-32773

4(a). Last day of fiscal year for which this notice is filed:

December 31, 2019

4(b). [ ] Check box if this Form is being filed late (i.e., more than 90

calendar days after the end of the issuer's fiscal year). (See

Instruction A.2)

4(c). [ ] Check the box if this is the last time the issuer will be filing

this Form.

5. Calculation of registration fee:

(i) Aggregate sale price of securities sold during the

fiscal year pursuant to section 24(f): $81,842,784.93

(ii) Aggregate price of securities redeemed or

repurchased during the fiscal year: $174,228,583.00

(iii) Aggregate price of securities redeemed or

repurchased during any prior fiscal year

ending no earlier than October 11, 1995 that

were not previously used to reduce

registration fees payable to the Commission: $4,367,176,854.00

(iv) Total available redemption credits

[add Items 5(ii) and 5(iii)]: $4,541,405,437.00

(v) Net sales - if Item 5(i) is greater

than Item 5(iv)[subtract Item 5(iv)

from Item 5(i)]: $0.00

(vi) Redemption credits available for use

in future years - if Item 5(i) is less

than Item 5(iv)[subtract Item

5(iv) from Item 5(i): $4,459,562,652.07

(vii) Multiplier for determining registration fee

(See Instruction C.9) 0.00012980

(viii) Registration fee due [multiply Item 5(v) by Item 5(vii)

(enter "0" if no fee is due): $0.0000

6. Prepaid Shares

If the response to Item 5(i) was determined by deducting an amount of

securities that were registered under the Securities Act of 1933 pursuant

to rule 24e-2 as in effect before October 11, 1997, then report the amount

of securities (number of shares or other units) deducted here: N/A

If there is a number of shares or other units that were registered pursuant

to rule 24e-2 remaining unsold at the end of the fiscal year for which this

form is filed that are available for use by the issuer in future fiscal years,

then state that number here: N/A

7. Interest due - if this Form is being filed more than 90 days after the

end of the issuer's fiscal year (see Instruction D): $0.00

8. Total of the amount of the registration fee due plus any interest due

[line 5(viii) plus line 7]: $0.0000

9. Date the registration fee and any interest payment was sent to the

Commission's lockbox depository: N/A

Method of Delivery:

[ ] Wire Transfer

[ ] Mail or other means

SIGNATURE

This report has been signed below by the following persons on behalf of the

issuer and in the capacities and on the dates indicated.

By (Signature and Title)* /s/ John M. Malone

John M. Malone

Chief Compliance Officer

Date: March 30, 2020

*Please print the name and title of the signing officer below the signature.