Exhibit 10.46



• C'M'S' Law   .Tax • • DATE: 'tOcbk 2018 • DEED OF VAR I ATION 01• A LEASE OF FOURTH FLOOR,   8 FINSBURY CIRCUS, LONDONEC2 • Between • MITSUBISHI ESTATE LONDON LIMITED (as   Landlord) CRA I NTERNATIONAL (UK) LIMITED (a s Tenant) • and CRA I   NTERNATIONAL, I NC. (as Tena nt's G uara ntor) • • • CMS Ca meron Mt:Kenna   Nabarro Olswa n g L L P Ca nnon Place 78 Can non Street London EC4N 6A F T   -44 20 7367 3000 F +44 20 7367 2000 t:ms. l aw • UK - 615523364.1 • 


    




 










• TABLE OF   CONTENTS • I. 2. .., .). Definition s   .....................................................................................................................................   I Interpretation....................................   ..............................................................................................2   Variation .... ................... ........................   ................................ ..........................   ...............................2 Tenant's Guarantor   .......................... ......... ................... .........   .........................................................4 General   ................ ..... .......... ................... ..............   .................. .......................................   ..................4 Governi ng Lnw and Jurisdiction   ....................................................................................................5   Registration At the Land Regi stry   .................................................................................................5   • 4. 5. 6. 7. • • • • • • • • U K - 61 5523364 1 • 


    




 










• LAND REGISTRY   Land Registration Act 2002 • DEED OF VAlUATION County and district/ London   borough Cit y of London • Tit le numbers Landlord's: NGL66474 Tenant's:   AGL379951 • Fourth Floor, R f i nsbury Circus, London EC2 Property DATE   PARTIES • ( I) MITSUBISHI ESTATE LONDON LIMITED (incorporated and registered   in England and Wales under company registration number 2435659), the   registered office of which is at Cannon Place, 78 Cannon Street, London ,   Engl a nd, EC4N 6AF (the "Landlord"); CRA INTER ATJONAL (UK)   LIMITED (i ncorporated and regi stered in England and Wales under compa ny   registration number 04007726), the regi stered office of w hich i s at R   Finsbury Circus, London, United Kingdom , EC2M 7EA (t he 'Tenant"); a nd   CRA INTERNATIONAL, I!\'C. (incorpora ted and regis tered i n Massachusetts,   United Sta tes of America under compa ny registration n umber 04 23722 1 0),   t he registered office of which is at 200 Clarendon Street T-10 Bosto n MA   02116 and wh ose address for service in England and Wales i s at 99 Bishopsga   te London EC2 M 3X D (the ''Tenant's Guarantor''). (2) • (3) • RECITALS (A)   The Landlord is entit led t o t he reversion immediately expectan t on the   term created by the Lease and the Landlord 's reversiona r y interest is   registered wit h title number NGL66474. • (B) Th e unex pi red residue of the   term created by t he Lease is vested in the Tenant who is the registered   proprietor of t i t le number AGL379951 . (C) The Landlord, the Tena n t and   the Tenant's Guara n tor ha ve agreed to vary the Lease as provid ed by this   deed. • IT IS AGREED AS FOLLOWS: I. DEFINITIONS The following definitions a   ppl y in thi s deed: • ''Landlord'' means the first party to this deed and its   successors in title; ''Lease'' means a l ease of premises known as fourth   Floor, 8 Finsbury Circus, London EC2 (more particularly described in the   Lease) made between ( I ) the Landlord (2) the Tenant and (3) the Tenant's   Guarantor and dated 20 May 201 6 and registered at the Land Registry with   title number AGL379951 and any document supplem ental to or varying such   lease whether entered into before or after the date of this deed and   including this deed; • UK · 61 5523364.1 • 


    




 










• ··Tenant"   means the second party to this deed and its successors in title; • 'Tenant's   Guarantor" means the third party to this deed. 2. 2.1 INTERPRETATION   Unless otherwi se expressly sta ted, the rules of interpretation set out in   this clause 2 apply in this deed. • 2.2 The headings and sub-headings in this   deed are for ease of reference only and do not a ffect the meaning of this   deed. 2.3 Obligat ions owed by or to more than one person are owed by or to   them jointly and severally. • 2.4 A reference to legislation is a reference   to all: 2.4.1 directives, decisions and regulations of the Council or   Commission of the European Union; and 2.4.2 Acts ofParliament; and • 2.4.3   orders, regulations, consents, 1 icences, noti ces and bye-laws made or   granted: (a) under any Act of Parliament; or (b) under any directi ve,   decision or n:gulation of the Council or Commission of the E uropean Union;   or • (c) by a local authority or by a court of competent jurisdiction; and   2.4.4 mandatory codes of practice issued by a statutory body, in each case   having effect in the United Kingdom (or any part of it) from time to time.   2.5 A reference to a person includes an individual , firm , partnership,   company, association, organisat ion or trust (in each case whether or not   havin g a separate l egal personality). • 2.6 References to one gender   include all genders and words in the singular include the plural a nd V Ice   versa. 3. VARIATION • 3.1 The Landlord and the Tenant ag ree that the Lease   shall, with effect from the date of this deed be varied by: 3.2 the addition   of the following defin i tions in clause I after the definition   of"Service Yard": • "' Staircase End Date" means the   earlier of (a) the dat e that the Tenant assigns or determines this Lease   and/or its lease of t he floor of' the Building directly below the Premises   (sm·e where the assignment o./such lea ses is simultaneous and to the same   party; and the expiry of the Term and/or t he term granted by the Tenant's   lease of the floor of the Building directly below the Premises); (b) • "   Staircase Works" has the meaning ascribed to it in clause 12.3 7;"   The addition of the following clause as clause 4.1.16 3.3 • " 4.1.16 the   exclusive right to cut into and use such part of the floor slab between the   Premises and t he floor of the Building directly he /ow the Premises as may   be requisite for the UK - 61 5523364.1 2 • 


    




 










• purpose of   the installation. retention and use of the Staircase ·IVorks and thereafter   the right to install, attach, retain, replace, remo1•e. alter. repair.   maintain. use and reinstate such Staircase Works;" • • The addition of   "and 4.1.16" after "4.11 to 4.1.4" in clause 4.3. 3.4 The   deletion of the word "and" at the end of sub-clause 8.1 (r), the   addition of the words "Rent; and" in place of the word   "Rent." at the end of sub-clause 8.1 (s) and the addition of the fol   lowing clause as clau se 8.l(t) 3.5 " (t) any loss of floor area as a   result of any Staircase Works or any other works carried out by the   Tenant." • The addi t ion of the following clauses as clauses   12.3.7-12.3.13 3.6 "12.3.7 The Tenant may subject to: (a) the consent of   the Landlord, which shall not be unreasonably withheld or delayed; • (b) the   provision of a structural sw1•ey and detailed design statement to the   Landlord; (c) obtaining all necessar y consents; (d) obtaining the Landlord's   consent to the detailed design and method statement (which shall not be   unreasonably withheld or delayed); and • (e) the provisions ofthe Tenant's   relel'(lnt lease of the jloor of the Building helmv the Premises,; install a   staircase to connect/he Premises to the Third floor of the Building and to   make openings in the floor slabs bounding the Premises and the Third floor of   the Building for this purpose (the "Staircase Works") provided   that: • (f) t he Staircase Works do not materially ad1·ersely af fect the   efficient operation uf the plant and/or mecha nical sen·ices and do not   m·erload the electrical services of the Building; and • (g) the Landlord's   consent shall be subject to the requirement that the Tenant: removes the   Staircase rYorks (or the relemnt part of the Staircase Works); (i) (ii)   reinstates the f loor slahs of' the Premises and any other part of the   Building (including reconfiguring any mechanical a nd electrical services) to   the extent direct!)'· affected by the Staircase Works; and • (iii) makes good   any physical damage caused thereby to the Building. at the Staircase End   Date. • 12.3.8 If the Tenant wishes tu cany out the Staircase Works it shall   submit to the Landlord plans a nd specifications showing the proposed design   of the Staircase Works a nd a method statement detailing hmv t he Staircase   Works will be carried out and completed. For the a voidance of doubt the   Landlord shall promptly apply for and use reasonable endeavours to procure   that the Landlord's building i nsurer consents in principle to the 12.3.9 • U   K-61 5523364.1 3 • 


    




 










• Staircase   Works without delay. The Landlord shall be entitled to >vithhold its own   consent unless and until such insurer's con sent has been so obtained. Be   fore starting the Staircase Works. the Tenant shall apply for, obtain and send   to the Landlord a copy of all necessary consents of any other person or   competent authority in relation to the Staircase Works and obtain the   Landlord's rvritlen approval of all such consents (such approval no/ to be   unreasonably ·withheld or delayed). The Tenant shall give the Landlord at   least five Business Days' notice of the date it intends to start the   Staircase Works. If the Tenant carries out the Stairca se Works. it will do   so: • 12.3.10 • 12.3.11 12.3.12 • (a) {b) (c) in a good and workmanlike manner   with good quality materials; to a good quality design; and in accordance with   all insurer's recjuirements notified Ia the Tenant in writing. all consents.   all statutory requirements and the method statement approved in accordance   with clause 12.3. 7, • and shall make good any damage caused to the Premises   and/or the Building in so doing. If the Tenant wishes to remove the Stairca   se Works and reinstate the Premises as a result of such removal at any time   during the Term. the Tenant shall comply with the terms in clause 12 3.7(g)   and the consent granted in respect of the Staircase Works in respect of such   removal and reinstatement and shall make good any damage caused to the   Premises and/or the Building in so doing." 12 3.13 • and the Lease shall   from the date of this deed take effect and be read and construed accordingly.   • 3.7 The Tenant covenants with the Landlord to comply with the tenns of the   clause added to the Lease by this deed. 3.8 Any bn:ach of the tenns of the   clause added to the Lease by this deed will give rise to a r ight of re-entry   under the Lease. • 4. TENANT'S GUARANTOR The Tenant's Guarantor consents to   the variation of the Lease contained in this deed and to the provisions of   this deed. In considera tion of the Landlord 's a greement t o vary the Lease   on the tenns of thi s deed the Tenant 's Guarantor a grees t hat its   obligations cont a ined in the Lease continue in full force and effect, and   extend and appl y to the Lease as varied by this deed and extend and apply to   the obligations of the Tenant contained in this deed. • 5. GENERAL 5.1 This   deed is supplement al and colla t eral t o the Lease. • The Lease remains in   full force and effect as varied by this deed. 5.2 5.3 This deed will not   release or lessen the lia bility under the Lease of the Tenant, the Tenant's   Guarantor or any other person whether before or after the date of this deed.   5.4 Unless ex pressly stated nothing in this deed will create any rights in   favour of a ny person pursuant to the Contracts (Rights of Third Parties) Act   1999. • UK-61 5523364. 1 4 • 


    




 










• 6. GOVERNING   LAW AND JURISDICTIO.l'i This deed and any dispute or claim arising out of or   in connection with it or its subject matter or fonnation (including   non-contractual disputes or claims) are governed by the law of England and   Wales. The parties irrevocably agree that the courts of England and Wales   have exclusive jurisdiction to detennine any dispute or claim that arises out   of or in connection with this deed or its subject matter or fonnation   (including non-contractual disputes or claims). • 6.1 6.2 • REGISTRATION AT   THE LAND REGISTRY The Tenant shall: 7. 7.1 • 7.1.1 7.1.2 register this deed   at the Land Registry within one month of the date of this deed; use its best   endeavours to procure that all rights granted or reserved by this deed a re   properly noted against the affected titles; within one week of the   registration of the deed or notice against the affected titles (as the case   may be) deliver to the Landlord official copies of the registered titles.   7.1.3 • 7.2 The Landlord shall not be liable to the Tenant for the Tenant's   failure to register and/or to protect this deed or any rights granted by it.   This document has been executed as a deed and is deli vered on the date   stated at the beginning of it. • • • • • • UK ·61 5523364. 1 5 • 


    




 










• Execu ted as   a deed hy i\IITSUBISHI ESTATE LONDON LIMITED act ing by [a director a nd its   secreta ry] [t wo directors]: ) ) ) ) • Direct or • Directo r/Secreta ry • •   • • • • • • U K-61 5523364.1 6 •