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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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<SEC-DOCUMENT>0001057439-11-000017.txt : 20110131
<SEC-HEADER>0001057439-11-000017.hdr.sgml : 20110131
<ACCEPTANCE-DATETIME>20110131133915
ACCESSION NUMBER:		0001057439-11-000017
CONFORMED SUBMISSION TYPE:	SC 13G
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20110131
DATE AS OF CHANGE:		20110131

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			AEROCENTURY CORP
		CENTRAL INDEX KEY:			0001036848
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-EQUIPMENT RENTAL & LEASING, NEC [7359]
		IRS NUMBER:				943263974
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	005-52409
		FILM NUMBER:		11558813

	BUSINESS ADDRESS:	
		STREET 1:		1440 CHAPIN AVE STE 310
		CITY:			BURLINGAME
		STATE:			CA
		ZIP:			94010
		BUSINESS PHONE:		6503401888

	MAIL ADDRESS:	
		STREET 1:		1440 CHAPIN AVENUE SUITE 310
		CITY:			BURLINGAME
		STATE:			CA
		ZIP:			94010

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	AEROMAX INC
		DATE OF NAME CHANGE:	19970331

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			THOMSON HORSTMANN & BRYANT INC
		CENTRAL INDEX KEY:			0001057439
		IRS NUMBER:				223508647
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G

	BUSINESS ADDRESS:	
		STREET 1:		PARK 80 WEST PLAZA ONE
		STREET 2:		5TH FLOOR
		CITY:			SADDLE BROOK
		STATE:			NJ
		ZIP:			07663
		BUSINESS PHONE:		2013682770

	MAIL ADDRESS:	
		STREET 1:		PARK 80 WEST PLAZA ONE
		STREET 2:		5TH FLOOR
		CITY:			SADDLE BROOK
		STATE:			NJ
		ZIP:			07663
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G
<SEQUENCE>1
<FILENAME>acy10.txt
<TEXT>

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

SCHEDULE 13G

Under the Securities Exchange Act of 1934
(Amendment No. *)

(Name of Issuer)
Aerocentury Corp

(Title of Class of Securities)
Common Stock


(CUSIP Number)
007737109

Check the following box if a fee
is being paid with this statement.
 (A fee is not required only if the
 filing person:  (1) has a previous
 statement on file reporting beneficial
 ownership of more than five percent
 of the class of securities described
 in Item 1; and (2) has filed no amendment
 subsequent thereto reporting beneficial
ownership of five percent or less
of such class.) (See Rule 13d-7).

*The remainder of this cover page shall
 be filled out for a reporting persons
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 (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).


1  NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF PERSON
	THOMSON HORSTMANN & BRYANT, INC.
	22-3508647

2  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
	N/A

3  SEC USE ONLY

4  CITIZENSHIP OR PLACE OF ORGANIZATION
	A DELAWARE CORPORATION
	NORWALK, CT 06851

5  SOLE VOTING POWER
	0

6  SHARED VOTING POWER
	0

7  SOLE DISPOSITIVE POWER
	 100,000

8  SHARED DISPOSITIVE POWER
	NONE

9  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
	100,000

10  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
	N/A

11  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
	6.22%

12  TYPE OF REPORTING PERSON *
	IA

ITEM 1.
	(A) Aerocentury Corp
	(B) 1440 CHAPIN AVE STE 310 BURLINGAME CA 94010

ITEM 2.
	(A) THOMSON HORSTMANN & BRYANT, INC.
	(B) 501 MERRITT 7, NORWALK, CT  06851
	(C) A DELAWARE CORPORATION
	(D) COMMON
	(E) 872391107

ITEM 3.
	(E) INVESTMENT ADVISER REGISTERED UNDER SECTION
203 OF THE INVESTMENT ADVISERS ACT OF 1940

ITEM 4.
	(A)  100,000
	(B)  6.22
	(C)	(I)   0
		(II)	0
		(III)	100,000
		(IV)	NONE

ITEM 5.  N/A

ITEM 6.  N/A

ITEM 7.  N/A

ITEM 8.  N/A

ITEM 9.  N/A


ITEM 10. CERTIFICATION
	By signing below I certify that,
to the best of my knowledge and belief,
the securities referred to above were
 acquired in the ordinary course of
business and were not acquired for the
purpose of and do not have the effect of
changing or influencing the control of the
issuer of such securities and were not
 acquired in connection with or as a
participant in any transaction having
 such purposes 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.

							James Kennedy
							Date:   1/28/11


</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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