EXHIBIT 10.66

OFFICE BUILDING LEASE

1. PARTIES. This Lease, dated, for reference purposes only, July 13,
1995, is made by and between AerojetGeneral Corporation, an Ohio corporation(herein called Landlord) and Foundation Health, a California Health Plan, a California corporation(herein called
Tenant).

See Addendum, Paragraph 35

Said Lease is subject to the terms, covenants, and conditions herein set forth and the Tenant covenants as a material part of the consideration for this Lease to keep and perform each and all of said terms, covenants and conditions by it to
be kept and performed and that this Lease is made upon the condition of said performance.

2. TERM. The term of this Lease shall be for two
(2)years and one (1) month commencing on the 1stday of September,1995, and ending on the 30thday of September, 1997. See Addendum, Paragraph 37

3. POSSESSION. See Addendum, Paragraph 37

3.a. If
the Landlord, for any reason whatsoever, cannot deliver possession of the said Premises to the Tenant at the commencement of the term hereof, this Lease shall not be void or voidable, nor shall Landlord be liable to Tenant for any loss or damage
resulting therefrom.

3.b. In the event that Landlord shall permit Tenant to occupy the Premises prior to the commencement date of the
term, such occupancy shall be subject to all the provisions of this Lease. Said early possession shall not advance the termination date hereinabove provided.

4. RENT. Tenant agrees to pay to Landlord as rental, without prior notice or demand, for the Premises the sum of: one dollar ($1.00) per rentable square foot of the premises, as determined in accordance with BOMA standards, per
month, on or before the first day of the first full calendar month of the term hereof and a like sum on or before the first day of each and every successive calendar month thereafter during the term hereof, except that the first months
rent shall be paid upon the execution hereof. Rent for any period during the term hereof which is for less than one (1) month shall be a prorated portion of the monthly installment herein based upon a thirty (30) day month. Said rental
shall be paid to Landlord, without deduction or offset in lawful money of the United States of America, which shall be legal tender at the time of payment at the Office of the Building, or to such other person or at such other place as Landlord may
from time to time designate in writing.

See Addendum, Paragraph 38.

5. USE. Tenant shall use the Premises for general office purposes and shall not use or permit the Premises to be used for any other purpose without the prior written consent of Landlord.

Tenant shall not do, or permit anything to be done in or about the Premises nor bring or keep anything therein which will in any way increase the
existing rate of or affect any fire or other insurance upon the Building or any of its contents, or cause cancellation of any insurance policy covering said Building or any part thereof or any of its contents. Tenant shall not do or permit anything
to be done in or about the Premises which will in any way obstruct or interfere with the rights of other tenants or occupants of the Building or injure or annoy them or use or allow the Premises to be used for any improper, immoral, unlawful or
objectionable purpose, nor shall Tenant cause, maintain or permit any nuisance in, on or about the Premises. Tenant shall not commit or suffer to be committed any waste in or upon the Premises.



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6. COMPLIANCE WITH LAW. Tenant shall not use the Premises or permit anything to be done in or about the Premises
which will in any way conflict with any law, statute, ordinance or governmental rule or regulation now in force or which may hereafter be enacted or promulgated. Tenant shall, at its sole cost and expense, promptly comply with all laws, statutes,
ordinances and governmental rules, regulations or requirements now in force or which may hereafter be in force, and with the requirements of any board of fire insurance underwriters or other similar bodies now or hereafter constituted, relating to,
or affecting the condition use or occupancy of the Premises excluding structural changes not related to or affected by Tenants improvements or acts. The judgment of any court of competent jurisdiction or the admission of Tenant in any action
against Tenant, whether Landlord be a party thereto, or not, that Tenant has violated any law, statute, ordinance or governmental rule, regulation or requirement, shall be conclusive of that fact as between the Landlord and Tenant.

7. ALTERATIONS AND ADDITIONS. Tenant shall not make or suffer to be made any alterations, additions or improvements to or of the Premises or any part thereof
without the written consent of Landlord first had and obtained and any alterations, additions or improvements to or of said Premises, including, but not limited to, wall covering, paneling and built-in cabinet work, but excepting movable furniture
and trade fixtures, shall on the expiration of the term become a part of the realty and belong to the Landlord and shall be surrendered with the Premises. In the event Landlord consents to the making of any alterations, additions or improvements to
the Premises by Tenant, the same shall be made by Tenant at Tenants sole cost and expense and any contractor or person selected by Tenant to make the same must first be approved of in writing by the Landlord. Upon the expiration or sooner
termination of the term hereof, Tenant shall, upon written demand by Landlord, given at least thirty (30) days prior to the end of the term, at Tenants sole cost and expense, forthwith and with all due diligence remove any alterations,
additions or improvements made by Tenant, designated by Landlord to be removed, and Tenant shall, forthwith and with all due diligence at its sole cost and expense, repair any damage to the Premises caused by such removal.

8. REPAIRS.

8.a. By taking possession of the
Premises, Tenant shall be deemed to have accepted the Premises as being in good, sanitary order, condition and repair. Tenant shall, at Tenants sole cost and expense, keep the Premises and every part thereof in good condition and repair,
damage thereto from causes beyond the reasonable control of Tenant and ordinary wear and tear excepted. Tenant shall upon the expiration or sooner termination of this Lease surrender the Premises to the Landlord in good condition, ordinary wear and
tear and damage from causes beyond the reasonable control of Tenant excepted. Except as specifically provided in an addendum, if any, to this Lease, Landlord shall have no obligation whatsoever to alter, remodel, improve, repair, decorate or paint
the Premises or any part thereof and the parties hereto affirm that Landlord has made no representations to Tenant respecting the condition of the Premises or the Building except as specifically herein set forth.

8.b. Notwithstanding the provisions of Article 8.a. hereinabove, Landlord shall repair and maintain the structural portions of the Building, including the
roof, foundation and walls, and basic plumbing, air conditioning, heating, and electrical systems, installed or furnished by Landlord, unless such maintenance and repairs are caused in part or in whole by the act, neglect, fault or omission of any
duty by the Tenant, its agents, servants, employees or invitees, in which case Tenant shall pay to Landlord the reasonable cost of such maintenance and repairs. Landlord shall not be liable for any failure to make any such repairs or to perform any
maintenance unless such failure shall persist for an unreasonable time after written notice of the need of such repairs or maintenance is given to Landlord by Tenant. Except as provided in Article 18 hereof, there shall be no abatement of rent and
no liability of Landlord by reason or any injury to or interference with Tenants business arising from the making of any repairs, alterations or improvements in or to any portion of the Building or the Premises or in or to fixtures,
appurtenances and equipment therein. Tenant waives the right to make repairs at Landlords expense under any law, statute or ordinance now or hereafter in effect.

9. LIENS. Tenant shall keep the Premises and the property in which the Premises are situated free from any liens arising out of any work performed, materials furnished or obligations incurred by Tenant.
Landlord may require, at Landlords sole option, that Tenant shall provide to Landlord, at Tenants sole cost and expense, a lien



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and completion bond in an amount equal to one and one-half (11/2) times, any and all estimated cost of any improvements, additions, or alterations in the Premises, to insure Landlord against any liability for mechanics and materialmens liens and to insure
completion of the work.

10. ASSIGNMENT AND SUBLETTING. Tenant shall not either voluntarily or by operation of law, assign, transfer,
mortgage, pledge, hypothecate or encumber this Lease or any interest therein, and shall not sublet the said Premises or any part thereof, or any right or privilege appurtenant thereto, or suffer any other person (the employees, agents, servants and
invitees of Tenant excepted) to occupy or use the said Premises, or any portion thereof.

11. SUBROGATION. As long as both their respective insurers
so permit, Landlord and Tenant hereby mutually waive their respective rights of recovery against each other for any loss insured by fire, extended coverage and other property insurance policies existing for the benefit of the respective parties.
Each party shall obtain any special endorsements, if required by their insurer to evidence compliance with the aforementioned waiver.

12. LIABILITY
INSURANCE. Tenant shall, at Tenants expense, obtain and keep in force during the term of this Lease a policy of comprehensive public liability insurance insuring Landlord and Tenant against any liability arising out of the ownership, use,
occupancy or maintenance of the Premises and all areas appurtenant thereto. The limit of said insurance shall not, however, limit the liability of the Tenant hereunder. Tenant may carry said insurance under a blanket policy, providing, however, said
insurance by Tenant shall have a Landlords protective liability endorsement attached thereto. If Tenant shall fail to procure and maintain said insurance, Landlord may, but shall not be required to, procure and maintain same, but at the
expense of Tenant. Insurance required hereunder, shall be in companies rated A+ AAA or better in Bests Insurance Guide. Tenant shall deliver to Landlord prior to occupancy of the Premises copies of policies of liability insurance
required herein or certificates evidencing the existence and amounts of such insurance with loss payable clauses satisfactory to Landlord. No policy shall be cancellable or subject to reduction of coverage except after ten (10) days prior
written notice to Landlord.

13. SERVICES AND UTILITIES. Provided that Tenant is not in default hereunder Landlord agrees to furnish to the Premises
from 6:00 a.m. to 6:00 p.m. Monday through Friday and 8:00 a.m. to 1:00 p.m. on Saturday and at such other times as Tenant may request subject to the rules and regulations of the Building of which the Premises are a part, electricity for normal
lighting and fractional horsepower office machines, heat and air conditioning required in Landlords judgment for the comfortable use and occupation of the Premises, and janitorial service. Landlord shall also maintain and keep lighted the
common stairs, common entries and toilet rooms in the Building of which the Premises are a part and that portion of the parking lot containing spaces allocated to Tenant. Landlord shall not be liable for, and Tenant shall not be entitled to, any
reduction of rental by reason of Landlords failure to furnish any of the foregoing when such failure is caused by accident, breakage, repairs, strikes, lockouts or other labor disturbances or labor disputes of any character, or by any other
cause, similar or dissimilar, beyond the reasonable control of Landlord. Landlord shall not be liable under any circumstances for a loss of or injury to property, however occurring, through or in connection with or incidental to failure to furnish
any of the foregoing. Wherever heat generating machines or equipment are used in the Premises which affect the temperature otherwise maintained by the air conditioning system, Landlord reserves the right to install supplementary air conditioning
units in the Premises and the cost thereof, including the cost of installation, and the cost of operation and maintenance thereof shall be paid by Tenant to Landlord upon demand by Landlord.

Tenant will not, without written consent of Landlord, use any apparatus or device in the Premises, including, but without limitation thereto, electronic
data processing machines, punch card machines, and machines using in excess of 120 volts, which will in any way increase the amount of electricity usually furnished or supplied for the use of the Premises as general office space; nor connect with
electric current except through existing electrical outlets in the Premises, any apparatus or device, for the purpose of using electric currant. If Tenant shall require water or electric current in excess of that usually furnished or supplied for
the use of the Premises as general office space, Tenant shall first procure the written consent of Landlord, which Landlord may refuse, to the use thereof and Landlord may cause a water meter or electrical current meter to be installed in the
Premises, so as to measure the amount of water and electric current consumed for any such use. The cost of any such meters and of installation, maintenance and repair thereof shall be paid for by the Tenant and Tenant agrees to pay to Landlord
promptly upon demand therefor by Landlord for all such water and electric current consumed as shown by said meters, at the rates charged for such services by the local public utility furnishing the same, plus any additional expense incurred in
keeping account of the water and electric current so consumed. If a separate meter is not installed, such excess cost for such water and electric current will be established by an estimate made by a utility company or electrical engineer.



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14. PROPERTY TAXES. Tenant shall pay, or cause to be paid, before delinquency, any and all taxes levied or
assessed and which become payable during the term hereof upon all Tenants leasehold improvements, equipment, furniture, fixtures and personal property located in the Premises; except that which has been paid for by Landlord, and is the
standard of the Building. In the event any or all of the Tenants leasehold improvements, equipment, furniture, fixtures and personal property shall be assessed and taxed with the Building, Tenant shall pay to Landlord its share of such taxes
within ten (10) days after delivery to Tenant by Landlord of a statement in writing setting forth the amount of such taxes applicable to Tenants property.

15. RULES AND REGULATIONS. Tenant shall faithfully observe and comply with the rules and regulations that Landlord shall from time to time promulgate and which are attached hereto. Landlord reserves the right
from time to time to make all reasonable modifications to said rules. The additions and modifications to those rules shall be binding upon Tenant upon delivery of a copy of them to Tenant. Landlord shall not be responsible to Tenant for the
nonperformance of any said rules by any other tenants or occupants.

16. HOLDING OVER. If Tenant remains in possession of the Premises or any part
thereof after the expiration of the term hereof, with the consent of Landlord, such occupancy shall be a tenancy from month to month at a rental in the amount of the last monthly rental, plus all other charges payable hereunder, and upon all the
terms hereof applicable to a month to month tenancy.

17. ENTRY BY LANDLORD. Landlord reserves and shall at any and all times have the right to
enter the Premises, inspect the same, supply janitorial service and any other service to be provided by Landlord to Tenant hereunder, to submit said Premises to prospective purchasers or tenants, to post notices of non-responsibility, and to alter,
improve or repair the Premises and any portion of the Building of which the Premises are a part that Landlord may deem necessary or desirable, without abatement of rent and may for that purpose erect scaffolding and other necessary structures where
reasonably required by the character of the work to be performed, always providing that the entrance to the Premises shall not be blocked thereby, and further providing that the business of the Tenant shall not be interfered with unreasonably.
Tenant hereby waives any claim for damages or for any injury or inconvenience to or interference with Tenants business, any loss of occupancy or quiet enjoyment of the Premises, and any other loss occasioned thereby. For each of the aforesaid
purposes, Landlord shall at all times have and retain a key with which to unlock all of the doors in, upon and about the Premises, excluding Tenants vaults, safes and files, and Landlord shall have the right to use any and all means which
Landlord may deem proper to open said doors in an emergency, in order to obtain entry to the Premises without liability to Tenant except for any failure to exercise due care for Tenants property. Any entry to the Premises obtained by Landlord
by any of said means, or otherwise shall not under any circumstances be construed or deemed to be a forceable or unlawful entry into, or a detainer of, the Premises, or an eviction of Tenant from the Premises or any portion thereof.

18. RECONSTRUCTION. In the event the Premises or the Building of which the Premises are a part are damaged by fire or other perils covered by fire and extended
coverage insurance, Landlord agrees to forthwith repair the same; and this Lease shall remain in full force and effect, except that Tenant shall be entitled to a proportionate reduction of the rent while such repairs are being made, such
proportionate reduction to be based upon the extent to which the making of such repairs shall materially interfere with the business carried on by the Tenant in the Premises. If the damage is due to the fault or neglect of Tenant or its employees,
there shall be no abatement of rent.

In the event the Premises or the Building of which the Premises are a part are damaged as a result of
any cause other than the perils covered by fire and extended coverage insurance, then Landlord shall forthwith repair the same, provided the extent of the destruction be less than ten (10%) per cent of the then full replacement cost of the
Premises or the Building of which the Premises are a part. In the event the destruction of the Premises or the Building is to an extent greater then ten (10%) per cent of the full replacement cost, then Landlord shall have the option:
(1) to repair or restore such damage, this Lease continuing in full force and effect, but the rent to be proportionately reduced as hereinabove in this Article provided; or (2) give notice to Tenant at any time within sixty (60) days
after such damage terminating this Lease as of the date specified in such notice, which date shall be no less than thirty (30) and no more than sixty (60) days after the giving of such notice. In the event of giving such notice, this Lease
shall expire and all interest of the Tenant in the Premises shall terminate on the date so specified in



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such notice and the Rent, reduced by a proportionate amount, based upon the extent, if any, to which such damage materiality interfered with the business
carried on by the Tenant in the Premises, shall be paid up to date of said such termination.

Notwithstanding anything to the contrary
contained in this Article, Landlord shall not have any obligation whatsoever to repair, reconstruct or restore the Premises when the damage resulting from any casualty covered under this Article occurs during the last twelve (12) months of the
term of this Lease or any extension thereof.

Landlord shall not be required to repair any injury or damage by fire or other cause, or to
make any repairs or replacements of any panels, decoration, office fixtures, railings, floor covering, partitions, or any other property installed in the Premises by Tenant.

The Tenant shall not be entitled to any compensation or damages from Landlord for loss of the use of the whole or any part of the premises, Tenants
personal property or any inconvenience or annoyance occasioned by such damage, repair, reconstruction or restoration. Notwithstanding the foregoing, Tenant has the option to terminate the Lease if more than 20% of the premises are rendered unuseable
by destruction for more than 30 days after the date on which the damage occurred.

19. DEFAULT. The occurrence of any one or more of the following
events shall constitute a default and breach of this Lease by Tenant.

19.a. The vacating or abandonment of the Premises by Tenant.

19.b. The failure by Tenant to make any payment of rent or any other payment required to be made by Tenant hereunder, as and when due,
where such failure shall continue for a period of three (3) days after written notice thereof by Landlord to Tenant.

19.c. The
failure by Tenant to observe or perform any of the covenants, conditions or provisions of this Lease to be observed or performed by the Tenant, other than described in Article 19.b. above, where such failure shall continue for a period of thirty
(30) days after written notice thereof by Landlord to Tenant; provided, however, that if the nature of Tenants default is such that more than thirty (30) days are reasonably required for its cure, then Tenant shall not be deemed to
be in default if Tenant commences such cure within said thirty (30) day period and thereafter diligently prosecutes such cure to completion.

19.d. The making by Tenant of any general assignment or general arrangement for the benefit of creditors; or the filing by or against Tenant of a petition to have Tenant adjudged a bankrupt, or a petition or reorganization or arrangement
under any law relating to bankruptcy (unless, in the case of a petition filed against Tenant, the same is dismissed within sixty (60) days); or the appointment of a trustee or a receiver to take possession of substantially all of Tenants
assets located at the Premises or of Tenants interest in this Lease, where possession is not restored to Tenant within thirty (30) days; or the attachment, execution or other judicial seizure of substantially all of Tenants assets
located at the Premises or of Tenants interest in this Lease, where such seizure is not discharged in thirty (30) days.

20. REMEDIES IN
DEFAULT. In the event of any such material Default or breach by Tenant, Landlord may at any time thereafter, with or without notice or demand and without limiting Landlord in the exercise of a right or remedy which Landlord may have by reason of
such default or breach:

20.a. Terminate Tenants right to possession of the Premises by any lawful means, in which case this Lease
shall terminate and Tenant shall immediately surrender possession of the Premises to Landlord. In such event Landlord shall be entitled to recover from Tenant all damages incurred by Landlord by reason of Tenants default including, but not
limited to, the cost of recovering possession of the Premises; expenses of reletting, including necessary renovation and alteration of the Premises, reasonable attorneys fees, any real estate commission actually paid; the worth at the time of
award by the Court having jurisdiction thereof of the amount by which the unpaid rent for the balance of the term after the time of such award exceeds the amount of such rental loss for the same period that Tenant proves could be reasonably avoided;
that portion of the leasing commission held by Landlord and



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applicable to the unexpired term of this Lease. Unpaid installments of rent or other sums shall bear interest from the date due at the rate of ten
(10%) per cent per annum. In the event Tenant shall have abandoned the Premises, Landlord shall have the option of (a) taking possession of the Premises and recovering from Tenant the amount specified in this paragraph, or
(b) proceeding under the provisions of the following Article 20.b.

20.b. Maintain Tenants right to possession, in which case
this Lease shall continue in effect whether or not Tenant shall have abandoned the Premises. In such event Landlord shall be entitled to enforce all of Landlords rights and remedies under this Lease, including the right to recover the rent as
it becomes due hereunder.

20.c. Pursue any other remedy now or hereafter available to Landlord under the laws or judicial decision of the
State in which the Premises are located.

21. EMINENT DOMAIN. If more than twenty-five (25%) per cent of the Premises shall be taken or
appropriated by any public or quasi-public authority under the power of eminent domain, either party hereto shall have the right, at its option, to terminate this Lease, and Landlord shall be entitled to any and all income, rent, award, or any
interest therein whatsoever which may be paid or made in connection with such public or quasi-public use or purpose, and Tenant shall have no claim against Landlord for the value of any unexpired term of this Lease. If either less than or more than
twenty-five (25%) per cent of the Premises is taken, and neither party elects to terminate as herein provided, the rental thereafter to be paid shall be equitably reduced. If any part of the Building other than the Premises may be so taken or
appropriated, Landlord shall have the right at its option to terminate this Lease and shall be entitled to the entire award as above provided.

22.
OFFSET STATEMENT. Tenant shall at any time and from time to time upon not more than twenty (20) days prior written notice from Landlord execute, acknowledge and deliver to Landlord a statement in writing, (a) certifying that
this Lease is unmodified and in full force and effect (or, if modified, stating the nature of such modification and certifying that this Lease as so modified, is in full force and effect), and the date to which the rental and other charges are paid
in advance, if any, and (b) acknowledging that there are not, to Tenants knowledge, any uncured defaults on the part of the Landlord hereunder, or specifying such defaults if any are claimed. Any such statement may be relied upon by any
prospective purchaser or encumbrancer of all or any portion of the real property of which the Premises are a part.

23. PARKING. See Addendum, paragraph
42.

24. AUTHORITY OF PARTIES.

24.a. Corporate Authority. If Tenant is a corporation, each individual executing this Lease on behalf of said corporation represents and warrants that he is duly authorized to execute and deliver this Lease on behalf of said
corporation, in accordance with a duly adopted resolution of the board of directors of said corporation or in accordance with the by-laws of said corporation, and that this Lease is binding upon said corporation in accordance with its terms.

24.b. Limited Partnerships. If the Landlord herein is a limited partnership, it is understood and agreed that any claims by Tenant
on Landlord shall be limited to the assets of the limited partnership, and furthermore, Tenant expressly waives any and all rights to proceed against the individual partners or the officers, directors or shareholders of any corporate partner, except
to the extent of their interest in said limited partnership.

25. GENERAL PROVISIONS.

(i) Plats and Riders. Clauses, plats and riders, if any, signed by the Landlord and the Tenant and endorsed on or affixed to this Lease are a part
hereof.

(ii) Waiver. The waiver by Landlord of any term, covenant or condition herein contained shall not be deemed to be a waiver
of such term, covenant or condition on any subsequent breach of the same or any other term, covenant or condition herein contained. The subsequent acceptance of rent hereunder by Landlord shall not be deemed to be a waiver of any preceding breach by
Tenant of any term, covenant or condition of this Lease, other than the failure of the Tenant to pay the particular rental so accepted, regardless of Landlords knowledge of such preceding breach at the time of the acceptance of such rent.



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(iii) Notices. All notices and demands which may or are to be required or permitted to be given by
either party to the other hereunder shall be in writing. All notices and demands by the Landlord to the Tenant shall be sent by United States Mail, postage prepaid, addressed to the Tenant at the Premises, or to such other place as Tenant may from
time to time designate in a notice to the Landlord. All notices and demands by the Tenant to the Landlord shall be sent by United States Mail, postage prepaid, addressed to Terrance Griffin, Building 2001, Department 0170, P.O. Box 1322, Sacramento,
CA 95813-6000, or to such other person or place as the Landlord may from time to time designate in a notice to the Tenant.

(iv) Joint
Obligation. If there be more than one Tenant the obligations hereunder imposed upon Tenants shall be joint and several.

(v)
Marginal Headings. The marginal headings and Article titles to the Articles of this Lease are not a part of this Lease and shall have no effect upon the construction or interpretation of any part hereof.

(vi) Time. Time is of the essence of this Lease and each and all of its provisions in which performance is a factor.

(vii) Successors and Assigns. The covenants and conditions herein contained, subject to the provisions as to assignment, apply to and bind the
heirs, successors, executors, administrators and assigns of the parties hereto, subject to the absolute prohibition against sublease and assignment.

(viii) Recordation. Neither Landlord nor Tenant shall record this Lease or a short form memorandum hereof without the prior written consent of the other party.

(ix) Quiet Possession. Upon Tenant paying the rent reserved hereunder and observing and performing all of the covenants, conditions and provisions
on Tenants part to be observed and performed hereunder, Tenant shall have quiet possession of the Premises for the entire term hereof, subject to all the provisions of this Lease.

(x) Late Charges. Tenant hereby acknowledges that late payment by Tenant to Landlord of rent or other sums due hereunder will cause Landlord to
incur costs not contemplated by this Lease, the exact amount of which will be extremely difficult to ascertain. Such costs include, but are not limited to, processing and accounting charges, and late charges which may be imposed upon Landlord by
terms of any mortgage or trust deed covering the Premises. Accordingly, if any installment of rent or of a sum due from Tenant shall not be received by Landlord or Landlords designee within ten (10) days after written notice that said
amount is past due, then Tenant shall pay to Landlord a late charge equal to ten (10%) per cent of such overdue amount. The parties hereby agree that such late charges represent a fair and reasonable estimate of the cost that Landlord will
incur by reason of the late payment by Tenant. Acceptance of such late charges by the Landlord shall in no event constitute a waiver of Tenants default with respect to such overdue amount, nor prevent Landlord from exercising any of the other
rights and remedies granted hereunder.

(xi) Prior Agreements. This Lease contains all of the agreements of the parties hereto with
respect to any matter covered or mentioned in this Lease, and no prior agreements or understanding pertaining to any such matters shall be effective for any purpose. No provision of this Lease may be amended or added to except by an agreement in
writing signed by the parties hereto or their respective successors in interest. This Lease shall not be effective or binding on any party until fully executed by both parties hereto.

(xii) Inability to Perform. This Lease and the obligations of the Tenant hereunder shall not be affected or impaired because the Landlord is
unable to fulfill any of its obligations hereunder or is delayed in doing so, if such inability or delay is caused by reason of strike, labor troubles, acts of God, or any other cause beyond the reasonable control of the Landlord.



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(xiii) Attorneys Fees. In the event of any action or proceeding brought by either party
against the other under this Lease, the prevailing party shall be entitled to recover all costs and expenses including the fees of its attorneys in such action or proceeding in such amount as the court may adjudge reasonable in attorneys fees.

(xiv) Sale of Premises by Landlord. In the event of any sale of the Building, Landlord shall be and is hereby entirely freed and
relieved of all liability under any and all of its covenants and obligations contained in or derived from this Lease arising out of any act, occurrence or omission occurring after the consummation of such sale; and the purchaser, at such sale or any
subsequent sale of the Premises shall be deemed, without any further agreement between the parties or their successors in interest or between the parties and any such purchaser, to have assumed and agreed to carry out any and all of the covenants
and obligations of the Landlord under this Lease.

(xv) Subordination, Attornment. Upon request of the Landlord, Tenant will in
writing subordinate its rights hereunder to the lien of any first mortgage, or first deed of trust to any bank, insurance company or other lending institution, now or hereafter in force against the land and Building of which the Premises are a part,
and upon any buildings hereafter placed upon the land of which the Premises are a part, and to all advances made or hereafter to be made upon the security thereof.

In the event any proceedings are brought for foreclosure, or in the event of the exercise of the power of sale under any mortgage or deed of trust made by the Landlord covering the Premises, the Tenant shall attorn to
the purchaser upon any such foreclosure or sale and recognize such purchaser as the Landlord under this Lease.

The provisions of this
Article to the contrary notwithstanding, and so long as Tenant is not in default hereunder, this Lease shall remain in full force and effect for the full term hereof.

(xvi) Name. Tenant shall not use the name of the Building or of the development in which the Building is situated for any purpose other than as an address of the business to be conducted by the Tenant in the
Premises.

(xvii) Separability. Any provision of this Lease which shall prove to be invalid, void or illegal shall in no way affect,
impair or invalidate any other provision hereof and such other provision shall remain in full force and effect.

(xviii) Cumulative
Remedies. No remedy or election hereunder shall be deemed exclusive but shall, wherever possible, be cumulative with all other remedies at law or in equity.

(xix) Choice of Law. This Lease shall be governed by the laws of the State in which the Premises are located.

(xx) Signs and Auctions. Tenant shall not place any sign upon the Premises or Building or conduct any auction thereon without Landlords prior written consent.

26. BROKERS. Tenant warrants that it has had no dealings with any real estate broker or agents in connection with the negotiation of this Lease excepting only
Frank Pipgras Real Estate and it knows of no other real estate broker or agent who is entitled to a commission in connection with this Lease.

27.
BROKERS FEE.

(a) Upon execution of this Lease by both parties, Landlord shall pay to Frank Pipgras Real Estate and McCuen
Properties Licensed real estate broker(s), a fee as set forth in Addendum, Paragraph 46 for brokerage services rendered by said broker(s) to Landlord in this transaction.

(b) Landlord further agrees that if Tenant exercises any Option which is granted to Tenant under this Lease, or any subsequently granted option which is substantially similar to an Option granted to Tenant under this
Lease, or if Tenant acquires any rights to the Premises or other premises described in this Lease which are substantially similar to what Tenant would have acquired had an Option herein granted to Tenant been exercised, or if Tenant remains in
possession of the Premises after the expiration of the term of this Lease after having failed to



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exercise an Option, or if said broker(s) are the procuring cause of any other lease or sale entered into between the parties pertaining to the Premises
and/or any adjacent property in which Landlord has an interest, then as to any of said transactions, Landlord shall pay said broker(s) a fee in accordance with the schedule of said broker(s) in effect at the time of execution of this Lease.

(c) Landlord agrees to pay said fee not only on behalf of Landlord, but also on behalf of any person, corporation, association, or other
entity having an ownership interest in said real property or any part thereof, when such fee is due hereunder. Any transferee of Landlords interest in this Lease, whether such transfer is by agreement or by operation of law, shall be deemed to
have assumed Landlords obligation under this paragraph. Said broker shall be a third party beneficiary of the provisions of this paragraph.

**CONTINUED ON NEXT PAGE**

The parties hereto have executed this Lease at the place and on the dates specified immediately
adjacent to their respective signatures.

If this Lease has been filled in, it has been prepared for submission to your attorney for his
approval. No representation or recommendation is made by the real estate broker or its agents or employees as to the legal sufficiency, legal effect, or tax consequences of this Lease or the transactions relating thereto.



|        |  |  |  |            |  |                                                                       |  |                      
|------- |  |  |  | ---------- |  | --------------------------------------------------------------------- |  | ---------------------
|        |  |  |  |            |  | AEROJET-GENERAL CORPORATION, an Ohio Corporation                     
|        |  |  |  |           
|        |  |  |  |            |  | By                                                                    |  | /s/ Terry P. Griffin 
|        |  |  |  |            |  | Its:                                                                  |  | Director, Real Estate
|        |  |  |  |           
|Address |  |  |  |            |  | By                                                                    |  |                      
|        |  | 
|        |  |  |  | LANDLORD
|        |  |  |  |            |  | FOUNDATION HEALTH, A CALIFORNIA HEALTH PLAN, a California Corporation
|        |  |  |  |           
|        |  |  |  |            |  | By                                                                    |  | /s/ Joe E. Erway     
|        |  |  |  |            |  | Its:                                                                  |  | Vice President       
|Address |  |  |  |            |  | By                                                                    |  |                      
|        |  | 
|        |  |  |  | TENANT  



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RULES AND REGULATIONS

1. No sign, placard, picture, advertisement, name or notice shall be inscribed, displayed or printed or affixed on or to any part of the outside or inside of the Building without the written consent of Landlord first
had and obtained and Landlord shall have the right to remove any such sign, placard, picture, advertisement, name or notice without notice to and at the expense of Tenant.

All approved signs or lettering on doors shall be printed, painted, affixed or inscribed at the expense of Tenant by a person approved of by Landlord.

Tenant shall not place anything or allow anything to be placed near the glass of any window, door, partition or wall which may appear
unsightly from outside the Premises; provided, however, that Landlord may furnish and install a Building standard window covering at all exterior windows. Tenant shall not without prior written consent of Landlord cause or otherwise sunscreen any
window.

2. The sidewalks, halls, passages, exits, entrances, elevators and stairways shall not be obstructed by any of the tenants or used by them for any
purpose other than for ingress and egress from their respective Premises.

3. Tenant shall not alter any lock or install any new or additional locks or any
bolts on any doors or windows of the Premises.

4. The toilet rooms, urinals, wash bowls and other apparatus shall not be used for any purpose other than
that for which they were constructed and no foreign substance of any kind whatsoever shall be thrown therein and the expense of any breakage, stoppage or damage resulting from the violation of this rule shall be borne by the Tenant.

5. Tenant shall not overload the floor of the Premises or in any way deface the Premises or any part thereof.

6. No furniture, freight or equipment of any kind shall be brought into the Building without the prior notice to Landlord and all moving of the same into or out of the
Building shall be done at such time and in such manner as Landlord shall designate. Landlord shall have the right to prescribe the weight, size and position of all safes and other heavy equipment brought into the Building and also the times and
manner of moving the same in and out of the Building. Safes or other heavy objects shall, if considered necessary by Landlord, stand on supports of such thickness as is necessary to properly distribute the weight. Landlord will not be responsible
for loss of or damage to any such safe or property from any cause and all damage done to the Building by moving or maintaining any such safe or other property shall be repaired at the expanse of Tenant.

7. Tenant shall not use, keep or permit to be used or kept any foul or noxious gas or substance in the Premises, or permit or suffer the Premises to be occupied or used
in a manner offensive or objectionable to the Landlord or other occupants of the Building by reason of noise, odors and/or vibrations, or interfere in any way with other tenants or those having business therein, nor shall any animals or birds be
brought in or kept in or about the Premises or the Building.

8. No cooking shall be done or permitted by any Tenant on the Premises, nor shall the
Premises be used for the storage of merchandise, for washing clothes, for lodging, or for any improper, objectionable or immoral purposes.

9. Tenant shall
not use or keep in the Premises or the Building any kerosene, gasoline or inflammable or combustible fluid or material, or use any method of heating or air conditioning other than that supplied by Landlord.

10. Landlord will direct electricians as to where and how telephone and telegraph wires are to be introduced. No boring or cutting for wires will be allowed without the
consent of the Landlord. The location of telephones, call boxes and other office equipment affixed to the Premises shall be subject to the approval of Landlord.

11. On Saturdays, Sundays and legal holidays, and on other days between the hours of 6:00 P.M. and 8:00 A.M. the following day, access to the Building, or to the halls, corridors, elevators or stairways in the Building, or to



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the Premises may be refused unless the person seeking access is known to the person or employee of the Building in charge and has a pass or is properly
identified. The Landlord shall in no case be liable for damages for any error with regard to the admission to or exclusion from the Building of any person, in case of invasion, mob, riot, public excitement, or other commotion, the Landlord reserves
the right to prevent access to the Building during the continuance of the same by closing of the doors or otherwise, for the safety of the tenants and protection of property in the Building and the Building.

12. Landlord reserves the right to exclude or expel from the Building any person who, in the judgment of Landlord, is intoxicated or under the influence of liquor or
drugs, or who shall in any manner do any act in violation of any of the rules and regulations of the Building.

13. No vending machine or machines of any
description shall be installed, maintained or operated upon the Premises without the written consent of the Landlord.

14. Landlord shall have the right,
exercisable without notice and without liability to Tenant, to change the name and street address of the Building of which the Premises are a part.

15.
Tenant shall not disturb, solicit, or canvass any occupant of the Building and shall cooperate to prevent same.

16. Without the written consent of
Landlord, Tenant shall not use the name of the Building in connection with or in promoting or advertising the business of Tenant except as Tenants address.

17. Landlord shall have the right to control and operate the public portions of the Building, and the public facilities, and heating and air conditioning, as well as facilities furnished for the common use of the tenants, in such manner as
it deems best for the benefit of the tenants generally.

18. All entrance doors in the Premises shall be left locked when the Premises are not in use, and
all doors opening to public corridors shall be kept closed except for normal ingress and egress from the Premises.



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