SC 13G

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

SCHEDULE 13G

Under the Securities Exchange Act of 1934

(Amendment No. _ )^*

Advent Technologies Holdings Inc

(Name of Issuer)

Common Stock

(Title of Class of Securities)

00788A105

(CUSIP Number)

December 31, 2021

(Date of Event Which Requires Filing of this Statement)

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 information required in the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 (the "Act") or otherwise subject to the liabilities of that section of the Act, but shall be subject to all other provisions of the Act (however, see the Notes.)

CUSIP No. 00788A105

1.	NAMES OF REPORTING PERSONS I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY) Invesco Ltd. 98-0557567
2.	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) [ ] (b) [ ]
3.	SEC USE ONLY
4.	CITIZENSHIP OR PLACE OF ORGANIZATION Bermuda
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH		5. SOLE VOTING POWER	2,776,351
		6. SHARED VOTING POWER	0
		7. SOLE DISPOSITIVE POWER	2,778,867
		8. SHARED DISPOSITIVE POWER	0
9.	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 2,778,867
10.	CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES [ ]
11.	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 5.4%
12.	TYPE OF REPORTING PERSON HC, IA

Item 1.
	(a)	Name of Issuer Advent Technologies Holdings Inc
	(b)	Address of Issuer's Principal Executive Offices 1 Mifflin Place, 119 Mt Auburn Street, Suite 400, Cambridge, MA 02138
Item 2.
	(a)	Name of Person Filing Invesco Ltd. ("Invesco Ltd.")
	(b)	Address of Principal Business Office or, if None, Residence 1555 Peachtree Street NE, Suite 1800, Atlanta, GA 30309
	(c)	Citizenship Bermuda
	(d)	Title of Class of Securities Common Stock
	(e)	CUSIP Number 00788A105
Item 3.	If This Statement is Filed Pursuant to Rule 13d-1(b), or 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)	[ ]	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)	[X]	An investment adviser in accordance with Rule 240.13d-1(b)(1)(ii)(E);
	(f)	[ ]	An employee benefit plan or endowment fund in accordance with Rule 240.13d-1(b)(1)(ii)(F);
	(g)	[X]	A parent holding company or control person in accordance with Rule 240.13d-1(b)(1)(ii)(G);
	(h)	[ ]	A savings association 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)	[ ]	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(J).
Item 4.	Ownership.
Provide the following information regarding the aggregate number and percentage of the class of securities of the issuer identified in Item 1.
	(a)	Amount Beneficially Owned:
		Invesco Ltd. , in its capacity as a parent holding company to its investment advisers, may be deemed to beneficially own 2,778,867 shares of the Issuer which are held of record by clients of Invesco Ltd. ..
	(b)	Percent of Class:
		5.4%
	(c)	Number of shares as to which such person has:
		(i)	sole power to vote or to direct the vote	2,776,351
		(ii)	shared power to vote or to direct the vote	0
		(iii)	sole power to dispose or to direct the disposition of	2,778,867
		(iv)	shared power to dispose or to direct the disposition of	0
Item 5.	Ownership of Five Percent or Less of 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 five percent of the class of securities, check the following: [ ]
Item 6.	Ownership of More than Five Percent on Behalf of Another Person.
	Invesco Capital Management LLC is a subsidiary of Invesco Ltd. and it advises the Invesco WilderHill Clean Energy ETF which owns 5.41% of the security reported herein. However, no one individual has greater than 5% economic ownership. The shareholders of the Fund have the right to receive or the power to direct the receipt of dividends and proceeds from the sale of securities listed above.
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company.
	Invesco Capital Management LLC
Item 8.	Identification and Classification of Members of the Group. Not Applicable. This schedule is not being filed pursuant to Rule 13d-1(b)(1)(ii)(J) or Rule 13d-1(d).
Item 9.	Notice of Dissolution of Group. Not Applicable
Item 10.	Certification. By signing below, I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not 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.

SIGNATURE

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.

Invesco Ltd.

By: /s/ Robert R. Leveille

Date: February 11, 2022

Name: Robert R. Leveille

Title: Global Head of Compliance

EX-99 2 Rule13D_JointFilingAgreement.htm JOINT FILING AGREEMENT

JOINT FILING AGREEMENT

In accordance with Rule 13d-1(k) (l) under the Securities Exchange Act of 1934, as amended, the undersigned hereby agree to the joint filing of the attached Schedule 13G, and any and all amendments thereto, and expressly authorize Invesco Ltd., as the ultimate parent company of each of its undersigned subsidiaries, to file such Schedule 13G, and any and all amendments thereto, on behalf of each of them.

Dated: 28/01/2022

Invesco Ltd.
By: /s/ Robert R. Leveille
Name: Robert R. Leveille
Title: Global Head of Compliance

Invesco Advisers, Inc.
By: /s/ Todd F. Kuehl
Name: Todd F. Kuehl
Title: Chief Compliance Officer

Invesco Canada Ltd.
By: /s/ Kate Archibald
Name: Kate Archibald
Title: SVP, Head of Compliance, and Chief Compliance Officer

Invesco Trust Company
By: /s/ Veronica Castillo
Name: Veronica Castillo
Title: Authorized Signatory

Invesco Hong Kong Limited
By: /s/ Lee Siu Mei
Name: Lee Siu Mei
Title: Authorized Signatory

Invesco Hong Kong Limited
By: /s/ Pang Sin Chu
Name: Pang Sin Chu
Title: Authorized Signatory

Invesco Asset Management Deutschland GmbH
By: /s/ Alexander Taft
Name: Alexander Taft
Title: MD - Struct. Finance, Europe

Invesco Asset Management Limited
By: /s/ Chris Edge
Name: Chris Edge
Title: Head of UK Compliance

Invesco Management S.A.
By: /s/ Peter Carroll
Name: Peter Carroll
Title: Head EMEA Delegation Oversight

Invesco Taiwan Limited
By: /s/ Jacky Hsiao
Name: Jacky Hsiao
Title: General Manager

Invesco Asset Management (Japan) Limited
By: /s/ Tsuyoshi Mochiyama
Name: Tsuyoshi Mochiyama
Title: Head of Compliance

Invesco Asset Management Singapore Limited
By: /s/ Lee Siu Mei
Name: Lee Siu Mei
Title: Authorized Signatory

Invesco Asset Management Singapore Limited
By: /s/ Pang Sin Chu
Name: Pang Sin Chu
Title: Authorized Signatory

Invesco Capital Management, LLC
By: /s/ Melanie Zimdars
Name: Melanie Zimdars
Title: CCO, ICM & ETFs

Invesco Investment Advisers, LLC
By: /s/ Trisha B Hancock
Name: Trisha B Hancock
Title: CCO, Broker-Dealers and UITs

Invesco Australia Ltd.
By: /s/ Ian Croucher
Name: Ian Croucher
Title: Senior Compliance Manager

Invesco Private Capital, Inc.
By: /s/ Josh E Levit
Name: Josh E Levit
Title: Chief Compliance Officer

OppenheimerFunds, Inc.
By: /s/ Donna White
Name: Donna White
Title: Compliance Director

Invesco Real Estate Management S.A.R.L.
By: /s/ Fabrice Coste
Name: Fabrice Coste
Title: Manager

Invesco Real Estate Management S.A.R.L.
By: /s/ Marion Geniaux
Name: Marion Geniaux
Title: Manager

EX-99

Invesco Joint Filing Agreement