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Filing Details

Accession Number:: 0001085146-22-000068
Form Type:: 13G Filing
Publication Date:: 2022-01-09 19:00:00

Filed By:: Conestoga Capital Advisors, Llc
Company:: Mercury Systems Inc (NASDAQ:MRCY)
Filing Date:: 2022-01-10
SEC Url:: 13G Filing

Ownership Summary

Please notice the below summary table is generated without human intervention and may contain errors. Please refer to the complete filing displayed below for exact figures.

Name	Sole Voting Power	Shared Voting Power	Sole Dispositive Power	Shared Dispositive Power	Aggregate Amount Owned Power	Percent of Class
Conestoga Capital Advisors	3,514,478	0	3,662,721	0	3,662,721	6.47%

Filing

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13G

Under the Securities Exchange Act of 1934

Mercury Systems Inc.

(Name of Issuer)

Common Stock, par value $0.01 per share

(Title of Class of Securities)

589378108

(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 ("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 Instructions).

CUSIP No.: 589378108

ITEM 1(a).	NAME OF ISSUER: Mercury Systems Inc.
ITEM 1(b).	ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES: 50 MINUTEMAN ROAD ANDOVER, MA 01810
ITEM 2(a).	NAME OF PERSON FILING: Conestoga Capital Advisors LLC
ITEM 2(b).	ADDRESS OF PRINCIPAL BUSINESS OFFICE OR, IF NONE, RESIDENCE: 550 E.Swedesford Rd. Suite 120 Wayne, PA 19087
ITEM 2(c).	CITIZENSHIP: Delaware
ITEM 2(d).	TITLE OF CLASS OF SECURITIES: Common Stock, par value $0.01 per share
ITEM 2(e).	CUSIP NUMBER: 589378108
ITEM 3.	IF THIS STATEMENT IS FILED PURSUANT TO SECTION 240.13d-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. 78c);
	(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 240.13d-1(b)(1)(ii)(E);
	(f) [ ]	An employee benefit plan or endowment fund in accordance with 240.13d-1(b)(1)(ii)(F);
	(g) [ ]	A parent holding company or control person in accordance with 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 240.13d-1(b)(1)(ii)(J);
	(k) [ ]	Group, in accordance with 240.13d-1(b)(1)(ii)(K). If filing as a non-U.S. institution in accordance with 240.13d1(b)(1)(ii)(J), please specify the type of institution:

ITEM 4.	OWNERSHIP
	As of December 31, 2021, the Reporting Person indirectly beneficially owned 3,662,721 shares 6.47% of the Issuers (Class A) Common Stock. Such shares of the Issuers (Class A) Common Stock were directly beneficially owned by the Accounts.
	(a) Amount beneficially owned:
	As of December 31, 2021, the Reporting Persons Conestoga Capital Advisors indirectly beneficially owned 3,662,721 shares of the 56,645,864 of the Issuers Common Stock indirectly beneficially owned by Conestoga Capital Advisors. Such shares of the Issuers Common Stock were directly beneficially owned by the Accounts.
	(b) Percent of class:
	1As of December 31, 2021, the Reporting Persons indirectly beneficially owned 6.47% of the Issuers issued and outstanding Common Stock (based on 56,645,864 shares of the Issuers Common Stock outstanding as of October 31, 2021 as reported by the Issuer in its Quarterly Report on Form 10-Q filed with the Securities and Exchange Commission on November 9, 2021).
	(c) Number of shares as to which the person has:
	(i) sole power to vote or to direct the vote:
	3,514,478
	(ii) shared power to vote or to direct the vote:
	0
	(iii) sole power to dispose or direct the disposition of:
	3,662,721
	(iv) shared power to dispose or to direct the disposition of:
	0
ITEM 5.	OWNERSHIP OF FIVE 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 five percent of the class of securities, check the following [ ].
ITEM 6.	OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON:
ITEM 7.	IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH ACQUIRED THE SECURITY BEING REPORTED ON BY THE PARENT HOLDING COMPANY:
ITEM 8.	IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP:
ITEM 9.	NOTICE OF DISSOLUTION OF GROUP:
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.