SC TO-I/A

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

SCHEDULE TO

TENDER OFFER STATEMENT UNDER SECTION 14(D)(1) OR 13(E)(1)
OF THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 3)

MFS Investment Grade Municipal Trust

(Name of Subject Company (Issuer))

MFS Investment Grade Municipal Trust
(Name of Filing Person (Issuer))

Common Shares, Without Par
(Title of Class of Securities)

59318B108
(CUSIP Number of Class of Securities)

Christopher R. Bohane
Massachusetts Financial Services Company
111 Huntington Avenue
Boston, MA 02199
Telephone: (617) 954-5000

(Name, address and telephone number of person authorized to receive notices and communications on behalf of filing persons)

With a Copy to:

David C. Sullivan
Ropes & Gray LLP
Prudential Tower
800 Boylston Street
Boston, MA 02199-3600
Telephone: (617) 951-7000

☐ Check the box if the filing relates solely to preliminary communications made before the commencement of a tender offer.

Check the appropriate boxes below to designate any transactions to which the statement relates:

☐third party tender offer subject to Rule 14d-1.

☒issuer tender offer subject to Rule 13e-4.

☐going-private transaction subject to Rule 13e-3.

☐amendment to Schedule 13D under Rule 13d-2.

Check the following box if the filing is a final amendment reporting the results of the tender offer. ☒

If applicable, check the appropriate box(es) below to designate the appropriate rule provision(s) relied upon:

☐Rule 13e-4(i) (Cross-Border Issuer Tender Offer)

☐        Rule 14d-1(d) (Cross-Border Third-Party Tender Offer)

                                         -2-

EXPLANATORY NOTE

This Amendment No. 3 (“Amendment No. 3”) amends and supplements the Schedule TO filed with the Securities and Exchange Commission (the “SEC”) on August 25, 2023, as amended October 6, 2023, and November 7, 2023, regarding the communications made for the commencement of a tender offer (the “Offer”) on October 6, 2023 by MFS Investment Grade Municipal Trust, a closed-end management investment company (the “Fund”), to purchase for cash up to 10% or 911,024 shares of the Fund’s outstanding common shares (the “Shares”) upon the terms and subject to the conditions of the Offer.

This Amendment No. 3 to Schedule TO is intended to satisfy the requirements pursuant to Rule 13e-4(c)(3) of the Exchange Act.

Items 1 through 11 and Item 13

The information set forth in the Offer to Purchase and the related Letter of Transmittal is incorporated herein by reference into this Amendment No. 3 in answer to Item 1 through Item 11 and Item 13 of Schedule TO.

Items 12. EXHIBITS

Item 12 of the Schedule TO is hereby amended and supplemented to add the following exhibits:

Exhibit No.Document

(a)(1)(i)	Offer to Purchase dated October 6, 2023.1
(a)(1)(ii)	Letter of Transmittal.1
(a)(1)(iii)	Letter to Brokers, Dealers, Commercial Banks, Trust Companies and Other Nominees.1
(a)(1)(iv)	Letter to Clients.1
(a)(1)(v) (a)(2) (a)(3) (a)(4)	Notice of Withdrawal.1 None. Not Applicable. Not Applicable.
(a)(5)(iii) (a)(5)(iv) (a)(5)(v) (d)	Press Release issued on October 6, 2023.1 Press Release issued on November 7, 2023.2 Press Release issued on November 13, 2023.3 Tender Offer and Standstill Agreement dated August 23, 2023.1

                                          -3-

  (g)   (h)   (s)   None.   None.   Filing Fee Tables.³

¹ Previously Filed on October 6, 2023, as an exhibit to the Schedule TO.

² Previously Filed on November 7, as an exhibit to the Schedule TO.

³ Filed herewith.

                                         -4-

SIGNATURE

After due 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.

MFS Investment Grade Municipal Trust
	By:                                            /s/ William B. Wilson
	Name:                                         William B. Wilson
	Title:       Assistant Secretary and Assistant Clerk

                                        -5-

EX-99.(A)(5)(V)

Exhibit (a)(5)(v)

For Immediate Release                                                                                                                                                                                                  Media contacts: Dan Flaherty, +1 617.954.4256

For shareholders/advisors: Jeffrey Schwarz, +1 617.954.5872

MFS INVESTMENT GRADE MUNICIPAL TRUST ANNOUNCES FINAL RESULTS OF TENDER OFFER

BOSTON (November 13, 2023) – MFS® Investment Grade Municipal Trust (the “Fund”) (NYSE: CXH) announced today that, in accordance with its tender offer for up to 10% of the Fund’s outstanding common shares (the “Shares”), which expired at 5:00 P.M., Eastern Standard Time, on November 6, 2023, the Fund has accepted 911,025 Shares, representing 10% of Shares, for payment on or about November 15, 2023.

A total of 3,875,017.30 Shares were properly tendered and not withdrawn by November 6, 2023, the final date for withdrawals. Therefore, on a prorated basis, approximately 23.51% of the Shares so tendered by each shareholder have been accepted for payment. The purchase price of properly tendered Shares is 98% of the Fund’s net asset value (“NAV”) per Share calculated as of the close of regular trading on the New York Stock Exchange (“NYSE”) on November 6, 2023, which is equal to $7.79 per Share.

The Fund’s information agent for the tender offer is Georgeson LLC and the depositary agent for the tender offer is Computershare Trust Company, N.A. Any questions with regard to the tender offer may be directed to the information agent toll-free at 1-866-316-3922.

About the Fund

The Fund is a closed-end investment company product advised by MFS Investment Management. Closed end funds, unlike open-end funds, are not continuously offered. Except pursuant to a tender offer, common shares of the Fund are only available for purchase/sale on the NYSE at the current market price. Shares may trade at a discount to NAV. Shares of the Fund are not FDIC-insured and are not deposits or other obligations of, or guaranteed by, any bank. Shares of the Fund involve investment risk, including possible loss of principal. For more complete information about the Fund, including risks, charges, and expenses, please see the Fund's annual and semi-annual shareholder reports or contact your financial adviser.

About MFS Investment Management

In 1924, MFS launched the first U.S. open-end mutual fund, opening the door to the markets for millions of everyday investors. Today, as a full-service global investment manager serving financial advisors, intermediaries, and institutional clients, MFS still serves a single purpose: to create long-term value for clients by allocating capital responsibly. That takes our powerful investment approach combining collective expertise, thoughtful risk management and long-term discipline. Supported by our culture of shared values and collaboration, our teams of diverse thinkers actively debate ideas and assess material risks to uncover what we believe are the best investment opportunities in the market. As of October 31, 2023, MFS manages $538.9 billion in assets on behalf of individual and institutional investors worldwide. Please visit mfs.com for more information.

MFS Investment Management 111 Huntington Ave., Boston, MA  02199

# # #

EX-FILING FEES

Exhibit (s)

EXHIBIT S

CALCULATION OF FILING FEE TABLES

Schedule TO

(Form Type)

MFS Investment Grade Municipal Trust

(Exact Name of Registrant as Specified in its Charter)

Table 1: Transaction Valuation

	Transaction Valuation	Fee rate	Amount of  Filing Fee (c)
Fees to Be Paid	$6,954,764.85 (a)	0.0001476%	$1,026.52
Fees Previously Paid	$6,865,480.63 (b)		$1,013.35
Total Transaction Valuation	$89,284.22
Total Fees Due for Filing			$13.17
Total Fees Previously Paid			$1,013.35
Total Fee Offsets
Net Fee Due			$13.17

(a)  Pursuant to Rule 0-11(b)(1) under the Securities Exchange Act of 1934, as amended, the Transactional Valuation was calculated by multiplying 911,025 shares of shares in the offer (10% of the total number of common shares outstanding rounded up to the nearest whole number) by $7.634 (98% of the net asset value per share of $7.79 as of the close of regular trading on the New York Stock Exchange on November 6, 2023)

(b)  Estimated for purposes of calculating the amount of the filing fee only. Pursuant to Rule 0-11(b)(1) under the Securities Exchange Act of 1934, as amended, the Transactional Valuation was calculated by multiplying 911,024.50 shares of shares in the offer (10% of the total number of common shares outstanding) by $7.536 (98% of the net asset value per share of $7.69 as of the close of regular trading on the New York Stock Exchange on October 3, 2023).

(c) Calculated at $147.60 per $1,000,000 of the Transaction Valuation.