Exhibit 10.1
AGREEMENT
This Agreement (this “Agreement”) is made and entered into as of March 21, 2015
by and among Insperity, Inc. (the “Company”) and the entities and natural
persons set forth in the signature pages hereto (collectively, “Starboard”)
(each of the Company and Starboard, a “Party” to this Agreement, and
collectively, the “Parties”).
RECITALS
WHEREAS, the Company and Starboard have engaged in various discussions and
communications concerning the Company’s business, financial performance and
strategic plans;
WHEREAS, as of the date hereof, Starboard is deemed to beneficially own shares
of Common Stock of the Company (the “Common Stock”) totaling, in the aggregate,
3,335,976 shares (the “Shares”), or approximately 13.1%, of the Common Stock
issued and outstanding on the date hereof; and
WHEREAS, as of the date hereof, the Company and the members of Starboard have
determined to come to an agreement with respect to the composition of the Board
of Directors of the Company (the “Board”) as of the date of this Agreement and
following the 2015 annual meeting of stockholders of the Company (the “2015
Annual Meeting”) and certain other matters, as provided in this Agreement.
NOW, THEREFORE, in consideration of the foregoing premises and the mutual
covenants and agreements contained herein, and for other good and valuable
consideration, the receipt and sufficiency of which are hereby acknowledged, the
Parties hereto, intending to be legally bound hereby, agree as follows:

1.    Nomination and Election of Directors; Board Committees and Related
Agreements.

(a)Nomination and Election of Directors. It is the Parties’ intent that,
immediately following the 2015 Annual Meeting, the following individuals (or
their replacement if any of them is unable or unwilling to serve as a director,
resigns as a director or is removed as a director, all in accordance with this
Agreement, to the extent applicable) will serve in the following classes of the
Board:

Class III (whose terms of office will expire at the Annual Meeting of
Stockholders in 2016)
Michael W. Brown, Richard G. Rawson and Eli Jones
Class I (whose terms of office will expire at the Annual Meeting of Stockholders
in 2017)
Peter A. Feld, Austin P. Young and the Additional Starboard Nominee
Class II (whose terms of office will expire at the Annual Meeting of
Stockholders in 2018)
Paul J. Sarvadi, Carol R. Kaufman and Norman R. Sorensen

In furtherance of the foregoing, the Parties have agreed as follows:
(i)Immediately after the execution of this Agreement, the Board and all
applicable committees and subcommittees of the Board shall take all necessary
actions to (1) set the size of the Board at ten (10) members, (2) appoint Peter
A. Feld and Norman R. Sorensen (together, the “Current Starboard Nominees”) as
directors of the Company and (3) subject to limitations set forth in Section
1(c), appoint at least one Current Starboard Nominee to each committee and
subcommittee of the Board. Peter A. Feld shall be appointed as a Class I
director with a term expiring at the 2017 annual meeting of stockholders (the
“2017 Annual Meeting”), and Norman R. Sorensen (the “2015 Starboard Nominee”)
shall be appointed as a Class II director with a term expiring at the 2015
Annual Meeting. After the appointment of the Current Starboard Nominees in
accordance with this Section 1(a)(i) and prior to the appointment of the
Additional Starboard Nominee in accordance with Section 1(a)(ii), the Board and
all applicable committees and subcommittees of the Board shall not (i) increase
the size of the Board to more than ten (10) directors or (ii) other than in
accordance with Section 1(a)(iii), seek to change the classes on which the Board
members serve, in each case without the prior written consent of Starboard.

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(ii)In addition to the Current Starboard Nominees, Starboard shall have the
right to nominate an additional nominee to serve as a Class I director of the
Company with a term expiring at the 2017 Annual Meeting (such director, the
“Additional Starboard Nominee” and together with the Current Starboard Nominees,
the “Starboard Nominees”) subject to the procedures set forth in this Section
1(a)(ii). Starboard shall submit two (2) nominees for the Additional Starboard
Nominee which nominees shall each meet the Director Criteria (as defined below).
Within five (5) business days after (i) each such nominee has submitted to the
Company the documentation required by Section 1(d)(v) herein and (ii)
representatives of the Company’s Board have conducted customary interview(s) of
each such nominee, the Nominating and Corporate Governance Committee (the
“Nominating Committee”) shall recommend one of such nominees (or, if the
Nominating Committee so determines, one of the two persons proposed by Starboard
prior to the date of this Agreement) as the Additional Starboard Nominee. The
Company shall use its reasonable best efforts to conduct any interview(s)
contemplated in the prior sentence as promptly as practicable, but in any case,
assuming reasonable availability of the nominees, within ten (10) business days,
after Starboard’s submission of the two nominees for the Additional Starboard
Nominee. Within five (5) calendar days of such recommendation, the Board shall
take all necessary actions to (1) set the size of the Board at eleven (11)
members, (2) appoint the Additional Starboard Nominee as a Class I director with
a term expiring at the 2017 Annual Meeting and (3) subject to limitations set
forth in Section 1(c), appoint the Additional Starboard Nominee to any committee
and subcommittee of the Board from which any of the Current Starboard Nominees
resign. After the appointment of the Additional Starboard Nominee in accordance
with this Section 1(a)(ii) and prior to the 2015 Annual Meeting, the Board and
all applicable committees and subcommittees of the Board shall not (i) increase
the size of the Board to more than eleven (11) directors or (ii) other than in
accordance with Section 1(a)(iii), seek to change the classes on which the Board
members serve, in each case without the prior written consent of Starboard.
(iii)Prior to the mailing of its definitive proxy statement for the 2015 Annual
Meeting, the Board and all applicable committees and subcommittees of the Board
shall take all necessary actions to nominate the 2015 Starboard Nominee for
election to the Board at the 2015 Annual Meeting as a Class II director with a
term expiring at the 2018 annual meeting of stockholders (the “2018 Annual
Meeting”). The Board and all applicable committees and subcommittees of the
Board shall also take all action necessary so that at the 2015 Annual Meeting,
the Board shall also nominate (1) Carol. R. Kaufman and Paul J. Sarvadi for
election to the Board at the 2015 Annual Meeting as Class II directors with
terms expiring at the 2018 Annual Meeting and (2) Austin P. Young (together with
Carol R. Kaufman and Paul J. Sarvadi, the “NSP Board Nominees”) for election to
the Board at the 2015 Annual Meeting as a Class I director with a term expiring
at the 2017 Annual Meeting. In addition, substantially concurrently with the
adjournment of the 2015 Annual Meeting, Eli Jones and Michael W. Brown shall
resign as Class I directors with terms expiring at the 2017 Annual Meeting and
shall be immediately reappointed by the Board as Class III directors with terms
expiring at the 2016 Annual Meeting. The Board and all applicable committees and
subcommittees of the Board shall not nominate any persons other than the NSP
Board Nominees and the 2015 Starboard Nominee for election at the 2015 Annual
Meeting. The Company will recommend, support and solicit proxies for the
election of the 2015 Starboard Nominee at the 2015 Annual Meeting in the same
manner as for the NSP Board Nominees at the 2015 Annual Meeting. The Company
shall use its reasonable best efforts to hold the 2015 Annual Meeting no later
than June 12, 2015.
(iv)Each of Paul S. Lattanzio and Jack M. Fields has executed and delivered to
the Company an irrevocable resignation letter pursuant to which each resigns
from the Board and any applicable committee or subcommittee of the Board on
which each serves, effective at the adjournment of the 2015 Annual Meeting (the
“Resignations”).
(v)The Board and all applicable committees and subcommittees of the Board shall
take all necessary actions to decrease the size of the Board from eleven (11)
members to nine (9) members effective immediately after the Resignations. After
the 2015 Annual Meeting and during the Standstill Period (as defined below), the
Board and all applicable committees and subcommittees of the Board shall not (i)
increase the size of the Board to more than nine (9) directors

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or (ii) seek to change the classes on which the Board members serve, in each
case without the prior written consent of Starboard.
(vi)If any Starboard Nominee (or any Starboard Replacement Director (as defined
below)) is unable or unwilling to serve as a director, resigns as a director
(including as the result of a failure to receive a majority vote at the 2015
Annual Meeting) or is removed as a director prior to the 2017 Annual Meeting,
with respect to Peter A. Feld or the Additional Starboard Nominee (or their
respective Starboard Replacement Director), or prior to the 2018 Annual Meeting,
with respect to Norman R. Sorensen (or his Starboard Replacement Director), and
at such time Starboard beneficially owns in the aggregate at least the lesser of
three percent (3.0%) of the Company’s then outstanding Common Stock and 764,983
shares of Common Stock (subject to adjustment for stock splits,
reclassifications, combinations and similar adjustments) (the “Minimum Ownership
Threshold”), Starboard shall have the ability to recommend a substitute
person(s) in accordance with this Section 1(a)(vi) (any such replacement nominee
shall be referred to as the “Starboard Replacement Director”). Any Starboard
Replacement Director recommended by Starboard must meet the following criteria:
(i) such person is independent of Starboard (for the avoidance of doubt, the
nomination by Starboard of such person to serve on the board of any other
company shall not (in and of itself) cause such person to not be deemed
independent of Starboard), (ii) such person will qualify as “independent”
pursuant to NYSE listing standards, (iii) such person has the relevant financial
and business experience to be a director of the Company and, with regard to a
Starboard Replacement Director, to replace any such Starboard Nominee (or any
Starboard Replacement Director), and (iv) such person meets the guidelines and
policies with respect to service on the Board as in effect as of the date of
this Agreement, or such additional or amended guidelines and polices approved by
the Board (with the prior approval of the Independent Advisory Committee) (the
“Corporate Governance Guidelines and Policies”) as reasonably determined by the
Nominating Committee (clauses (i)-(iv), the “Director Criteria”). The Nominating
Committee shall make its determination and recommendation regarding whether such
person meets the Director Criteria within five (5) business days after (i) such
nominee has submitted to the Company the documentation required by Section
1(d)(v) herein and (ii) representatives of the Company’s Board have conducted
customary interview(s) of such nominee. The Company shall use its reasonable
best efforts to conduct any interview(s) contemplated in this section as
promptly as practicable, but in any case, assuming reasonable availability of
the nominees, within ten (10) business days, after Starboard’s submission of
such nominees. In the event the Nominating Committee does not accept a
substitute person recommended by Starboard as the Starboard Replacement Director
as a result of such person not meeting the Director Criteria, Starboard shall
have the right to recommend additional substitute person(s) meeting the Director
Criteria whose appointment shall be subject to the Nominating Committee
recommending such person in accordance with the procedures described above. Upon
the recommendation of a Starboard Replacement Director nominee by the Nominating
Committee, the Board shall vote on the appointment of such Starboard Replacement
Director to the Board no later than five (5) calendar days after the Nominating
Committee recommendation of such Starboard Replacement Director; provided,
however, that if the Board does not elect such Starboard Replacement Director to
the Board as a result of such person not meeting the Director Criteria, the
Parties shall continue to follow the procedures of this Section 1(a)(vi) until a
Starboard Replacement Director is elected to the Board. Upon a Starboard
Replacement Director’s appointment to the Board, the Board and all applicable
committees and subcommittees of the Board shall take all necessary actions to
appoint such Starboard Replacement Director to any applicable committee or
subcommittee of the Board of which the replaced director was a member
immediately prior to such director’s resignation or removal. Any Starboard
Replacement Director designated pursuant to this Section 1(a)(vi) replacing the
2015 Starboard Nominee prior to the 2015 Annual Meeting shall stand for election
at the 2015 Annual Meeting together with the NSP Board Nominees. If at any time
Starboard’s aggregate beneficial ownership of Common Stock decreases to less
than the Minimum Ownership Threshold, the right of Starboard pursuant to this
Section 1(a)(vi) to participate in the recommendation of a Starboard Replacement
Director to fill the vacancy caused by any such resignation of any Starboard
Nominee or any Starboard Replacement Director shall automatically terminate.
Notwithstanding the foregoing, in the event that Starboard fails to comply with
its obligations in Section 1(d)(iii) prior to the 2015 Annual Meeting, the
Company shall not be required to nominate, recommend, support or solicit proxies
for the election of the 2015 Starboard Nominee for election to the Board at the
2015 Annual Meeting.

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(b)Independent Advisory Committee. As promptly as practicable but in any event
within ten (10) business days, following the date of this Agreement, the Board
shall establish an independent advisory committee of the Board which shall be
named the “Independent Advisory Committee” (the “Independent Advisory
Committee”) to review the Company’s business, and make recommendations to the
Board regarding capital allocation and targeted ranges for Adjusted EBITDA
Margins (as defined below) (including, but not limited to, with respect to all
advertising, general & administrative and corporate perquisite expenses as well
as dividends and stock repurchases), while taking into consideration the
Company’s risk profile and the potential impact of any recommended change on the
Company’s business model and strategic plan. The Board shall establish the
Charter of the Independent Advisory Committee in the form attached hereto as
Exhibit B (the “Independent Advisory Committee Charter”). The Independent
Advisory Committee shall remain in effect during the Standstill Period and, if
determined by the Board, thereafter. The Independent Advisory Committee shall be
comprised solely of members of the Board who qualify as “independent” pursuant
to NYSE listing standards. The membership of the Independent Advisory Committee
shall consist of two independent directors designated by the Company and two
directors designated by Starboard. The members of the Independent Advisory
Committee shall initially be Michael W. Brown, Austin P. Young, Peter A. Feld
and Norman R. Sorensen, with Peter A. Feld serving as Chairman of the
Independent Advisory Committee. After the date of this Agreement, the
Independent Advisory Committee may meet to organize, plan and commence the
evaluation and review to be performed by the Independent Advisory Committee to
be established in accordance with this Section 1(b). The Chairman of the Board
and Chief Executive Officer shall be (i) invited but not required to participate
in all meetings of the Independent Advisory Committee, (ii) informed in writing
of all information requests of the Independent Advisory Committee to the
Company’s management and (iii) provided with copies of all information and
reports provided to the Independent Advisory Committee; provided, that at any
time the Independent Advisory Committee may either (i) with the approval of at
least three (3) of the members of such committee or (ii) with respect to any
matter related to or concerning the Chairman of the Board and Chief Executive
Officer, recuse the Chairman of the Board and Chief Executive Officer from all
or any portion of any meeting of the Independent Advisory Committee or from
receiving information provided to the Independent Advisory Committee; and
provided, further, that, each meeting of the Independent Advisory Committee
shall include an executive session without the presence or participation of the
Chairman of the Board and Chief Executive Officer or other members of the
Company’s management team. Prior to finalizing or making any recommendations to
the Board, the Independent Advisory Committee shall preview all preliminary
recommendations with the Chairman of the Board and Chief Executive Officer and
provide the Chairman of the Board and Chief Executive Officer a reasonable
opportunity to provide input and further information concerning such
recommendations; provided, that at any time the Independent Advisory Committee
may either (i) with the approval of at least three (3) of the members of such
committee or (ii) with respect to any matter related to or concerning the
Chairman of the Board and Chief Executive Officer, recuse the Chairman of the
Board and Chief Executive Officer from such preview and input period. At or
promptly after the first meeting of the newly constituted Board following the
appointment of the Starboard Nominees to the Board pursuant to Section 1(a)(i),
the Independent Advisory Committee will recommend to the Board a lead
independent director (the “Lead Independent Director”) to serve for a one-year
term; provided, however, that if no such recommendation to the Board has been
made by the Independent Advisory Committee within ninety (90) days of the date
of such first meeting, the Board shall thereafter select a Lead Independent
Director. The Independent Advisory Committee shall recommend targeted ranges for
Adjusted EBITDA Margins for fiscal years 2015 and 2016 to the Board (the
“Proposed Targets”) within sixty (60) days following the 2015 Annual Meeting.
The Board shall have the right to review and approve such Proposed Targets (as
may be approved by the Board, the “Targets”). Subject to the Board’s approval of
the Proposed Targets, the Company shall issue a press release or public
announcement publishing such Targets, on the date of the next quarterly earnings
announcement of the Company after the Board’s approval of such Proposed Targets;
provided, however that the Company shall, subject to the Board’s approval of the
Proposed Targets, issue such press release or public announcement publishing
such Targets no later than the date of the second quarter fiscal year 2015
earnings announcement. The Board will take all actions reasonably necessary in
furtherance of establishing the Independent Advisory Committee pursuant to this
Section 1(b). For the purpose of this Agreement, “Adjusted EBITDA Margins” shall
mean the quotient of Adjusted EBITDA for any period divided by the gross profit
for such period (as shown on the Company’s consolidated statements of operations
on a consolidated basis for such period), and “Adjusted EBITDA” shall mean for
the Company and its subsidiaries, on a consolidated basis for any period, the
sum of (a) the operating income for such period, plus (b) depreciation and
amortization for such period, plus (c) non-cash stock based compensation expense
for such period, plus (d) the sum of all interest income for such period, plus
(e) extraordinary or non-recurring expenses or charges incurred in connection
with any transaction or other strategic events approved by the Board, including
any related advisory fees, during such period, plus (f) any non-cash write-off
for impairment of long lived assets (including goodwill, intangible assets and
fixed assets such as property, plant and equipment), or of deferred financing
fees or investments in debt and equity securities during such period, plus

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(g) any non-cash impact of accounting changes or restatements during such
period; provided, however, that the amounts of each of the items set forth in
the clauses above shall include, for the first twelve (12) months after any
acquisition, the actual historical amounts of such items for any person which is
acquired by the Company or any of its subsidiaries in such acquisition.
(c)Other Committees. Subject to the Corporate Governance Guidelines and Policies
and to NYSE rules and applicable laws, the Board and all applicable committees
and subcommittees of the Board shall take all actions necessary to ensure that
during the Standstill Period, each committee and subcommittee of the Board
(other than a committee or subcommittee formed to evaluate and/or take action
with respect to (i) the ownership of Shares by Starboard, (ii) the exercise of
any of the Company’s rights or enforcement of any of the obligations under this
Agreement, (iii) any action taken in response to actions taken or proposed by
Starboard or its Affiliates with respect to the Company or (iv) any transaction
proposed by, or with, Starboard or its Affiliates) includes one Starboard
Nominee or Starboard Replacement Director.
(d)Additional Agreements.
(i)Starboard agrees that it will cause its controlled Affiliates and Associates
to comply with the terms of this Agreement and shall be responsible for any
breach of this Agreement by any such controlled Affiliate or Associate. As used
in this Agreement, the terms “Affiliate” and “Associate” shall have the
respective meanings set forth in Rule 12b-2 promulgated by the Securities and
Exchange Commission under the Securities Exchange Act of 1934, as amended, or
the rules or regulations promulgated thereunder (the “Exchange Act”) and shall
include all persons or entities that at any time during the term of this
Agreement become Affiliates or Associates of any person or entity referred to in
this Agreement.
(ii)Upon execution of this Agreement, Starboard hereby agrees that it will not,
and that it will not permit any of its controlled Affiliates or Associates to,
(1) nominate or recommend for nomination any person for election at the 2015
Annual Meeting, directly or indirectly, (2) submit any proposal for
consideration at, or bring any other business before, the 2015 Annual Meeting,
directly or indirectly, or (3) initiate, encourage or participate in any
“withhold” or similar campaign with respect to the 2015 Annual Meeting, directly
or indirectly. Starboard shall not publicly or privately encourage or support
any other stockholder to take any of the actions described in this Section
1(d)(ii), provided, however, that the foregoing shall not be deemed to limit the
exercise by the Starboard Nominees (or any Starboard Replacement Director) of
their fiduciary duties and such exercise by such individuals shall not be a
breach of this Agreement.
(iii)Starboard agrees that it will (1) continue to have the right to vote all of
the Shares held as of the date hereof through the 2015 Annual Meeting and (2)
appear in person or by proxy at the 2015 Annual Meeting and vote all shares of
Common Stock of the Company beneficially owned by Starboard at the meeting (x)
in favor of the NSP Board Nominees, (y) in favor of the ratification of the
appointment of Ernst & Young LLP as the Company’s independent registered public
accounting firm for the year ending December 31, 2015 and (z) in accordance with
the Board’s recommendation with respect to the Company’s “say-on-pay” proposal,
unless Institutional Shareholder Services Inc. and Glass Lewis & Co., LLC
recommends otherwise with respect to such “say-on-pay” proposal.
(iv)Promptly after the date of this Agreement, Starboard agrees to obtain from
Peter A. Feld, and deliver to the Company, an irrevocable resignation letter
pursuant to which Peter A. Feld shall resign from the Board and all applicable
committees and subcommittees thereof if at any time Starboard’s aggregate
beneficial ownership of Common Stock decreases to less than the Minimum
Ownership Threshold.
(v)Prior to the date of this Agreement, the Current Starboard Nominees have each
submitted to the Company (x) a fully completed copy of the Company’s standard
director & officer questionnaire and other reasonable and customary director
onboarding documentation (including a resignation letter as part of the
Company’s majority voting policy and an authorization form to conduct a
background check) required by the Company in connection with the appointment or
election of new Board members and (y) the written representation and agreement
required

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pursuant to Section 2.18(d) of the Company’s Amended and Restated Bylaws (the
“Bylaws”). Any Starboard Replacement Director and any nominee for the Additional
Starboard Nominee will also promptly (but in any event prior to being placed on
the Board in accordance with this Agreement) submit to the Company (a) a fully
completed copy of the Company’s standard director & officer questionnaire and
other reasonable and customary director onboarding documentation (including a
resignation letter as part of the Company’s majority voting policy and an
authorization form to conduct a background check) required by the Company in
connection with the appointment or election of new Board members and (b) the
written representation and agreement required pursuant to Section 2.18(d) of the
Bylaws. Nothing contained in this Agreement or in any Corporate Governance
Guidelines and Policies shall prevent Starboard from nominating any person to
serve as a director of the Company or from proposing any other business (in each
case in accordance with the Company’s bylaws) to be considered at the 2016
Annual Meeting, the 2017 Annual Meeting or the 2018 Annual Meeting.
(vi)Starboard agrees that the Board or any committee or subcommittees thereof,
in the exercise of its fiduciary duties, may recuse any Starboard Nominees from
any Board or committee or subcommittee meeting or portion thereof at which the
Board or any such committee or subcommittee is evaluating and/or taking action
with respect to (i) the ownership of Shares by Starboard, (ii) the exercise of
any of the Company’s rights or enforcement of any of the obligations under this
Agreement, (iii) any action taken in response to actions taken or proposed by
Starboard or its Affiliates with respect to the Company or (iv) any transaction
proposed by, or with, Starboard or its Affiliates.
(vii)Solely for the purposes of calculating the Annual Director Award (as
defined in the Company’s Directors Compensation Plan, amended and restated as of
August 15, 2012, as amended by the First Amendment to the Directors Compensation
Plan as of January 1, 2015 (the “Director Plan”)), each Starboard Nominee shall
be deemed to have been appointed to the Board for the first time on the date of
the 2015 Annual Meeting and, accordingly, shall not be entitled to an Annual
Director Award on such date. The Parties further agree that each Starboard
Nominee will be entitled to receive the Initial Director Award (as defined in
the Director Plan) effective as of the date of the 2015 Annual Meeting and that
each Starboard Nominee shall be entitled to receive retainer fees from the date
of this Agreement as contemplated by the Director Plan.

2.    Standstill Provisions.
(a)Starboard agrees that from the date of this Agreement until the earlier of
(x) the date that is fifteen (15) business days prior to the deadline for the
submission of stockholder nominations for the 2016 Annual Meeting pursuant to
the Bylaws and (y) the date that is 100 days prior to the first anniversary of
the 2015 Annual Meeting (the “Standstill Period”) neither it nor any of its
Affiliates or Associates under its control will, and it will cause each of its
Affiliates and Associates under its control not to, directly or indirectly, in
any manner:
(i)engage in any solicitation of proxies or consents or become a “participant”
in a “solicitation” (as such terms are defined in Regulation 14A under the
Exchange Act) of proxies or consents (including, without limitation, any
solicitation of consents that seeks to call a special meeting of stockholders),
in each case, with respect to securities of the Company;
(ii)form, join or in any way participate in any “group” (within the meaning of
Section 13(d)(3) of the Exchange Act) with respect to the Common Stock (other
than a “group” that includes all or some of the persons identified on Exhibit A,
but does not include any other entities or persons not identified on Exhibit A
as of the date hereof); provided, however, that nothing herein shall limit the
ability of an Affiliate of Starboard to join the “group” following the execution
of this Agreement, so long as any such Affiliate agrees to be bound by the terms
and conditions of this Agreement;
(iii)deposit any Common Stock in any voting trust or subject any Common Stock to
any arrangement or agreement with respect to the voting of any Common Stock,
other than any such voting trust, arrangement or agreement solely among the
members of Starboard and otherwise in accordance with this Agreement;

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(iv)seek, or encourage any person, to submit nominations in furtherance of a
“contested solicitation” for the election or removal of directors with respect
to the Company or seek, encourage or take any other action with respect to the
election or removal of any directors;
(v)(A) make any proposal for consideration by stockholders at any annual or
special meeting of stockholders of the Company, (B) make any offer or proposal
(with or without conditions) with respect to any merger, acquisition,
recapitalization, restructuring, disposition or other business combination
involving the Company, or encourage, initiate or support any other third party
in any such related activity, (C) make any public communication in opposition to
any Company acquisition or disposition activity approved by the Board or (D)
call or seek to call a special meeting of stockholders;
(vi)seek, alone or in concert with others, representation on the Board, except
as specifically permitted in Section 1;
(vii)seek to advise, encourage, support or influence any person with respect to
the voting or disposition of any securities of the Company at any annual or
special meeting of stockholders, except in accordance with Section 1;
(viii)make any request or submit any proposal to amend the terms of this
Agreement other than through non-public communications with the Company that
would not be reasonably determined to trigger public disclosure obligations for
any Party; or
(ix)disclose any intention, plan or arrangement inconsistent with any provision
of this Section 2.
(b)Except as expressly provided in Section 1 or Section 2(a), each member of
Starboard shall be entitled to: (i) vote their shares on any other proposal duly
brought before the 2015 Annual Meeting or otherwise vote as each member of
Starboard determines in its sole discretion; and (ii) disclose, publicly or
otherwise, how it intends to vote or act with respect to any securities of the
Company, any stockholder proposal or other matter to be voted on by the
stockholders of the Company and the reasons therefore.

3.    Representations and Warranties of the Company.
The Company represents and warrants to Starboard that (a) the Company has the
corporate power and authority to execute this Agreement and to bind it thereto,
(b) this Agreement has been duly and validly authorized, executed and delivered
by the Company, constitutes a valid and binding obligation and agreement of the
Company, and is enforceable against the Company in accordance with its terms,
except as enforcement thereof may be limited by applicable bankruptcy,
insolvency, reorganization, moratorium, fraudulent conveyance or similar laws
generally affecting the rights of creditors and subject to general equity
principles and (c) the execution, delivery and performance of this Agreement by
the Company does not and will not violate or conflict with (i) any law, rule,
regulation, order, judgment or decree applicable to the Company, or (ii) result
in any breach or violation of or constitute a default (or an event which with
notice or lapse of time or both could constitute such a breach, violation or
default) under or pursuant to, or result in the loss of a material benefit
under, or give any right of termination, amendment, acceleration or cancellation
of, any organizational document, agreement, contract, commitment, understanding
or arrangement to which the Company is a party or by which it is bound.
4.Representations and Warranties of Starboard.
Starboard represents and warrants to the Company that (a) the authorized
signatory of Starboard set forth on the signature page hereto has the power and
authority to execute this Agreement and any other documents or agreements to be
entered into in connection with this Agreement and to bind Starboard thereto,
(b) this Agreement has been duly authorized, executed and delivered by
Starboard, and is a valid and binding obligation of Starboard, enforceable
against Starboard in accordance with its terms, except as enforcement thereof
may be limited by applicable bankruptcy, insolvency, reorganization, moratorium,
fraudulent conveyance or similar laws generally affecting the rights of
creditors and subject to general equity principles, (c) the execution of this
Agreement, the consummation of any of the transactions contemplated hereby, and
the fulfillment of the terms hereof, in each case in accordance with the terms
hereof, will not conflict with, or result in a breach or violation of the
organizational

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documents of Starboard as currently in effect, (d) the execution, delivery and
performance of this Agreement by Starboard does not and will not violate or
conflict with (i) any law, rule, regulation, order, judgment or decree
applicable to Starboard, or (ii) result in any breach or violation of or
constitute a default (or an event which with notice or lapse of time or both
could constitute such a breach, violation or default) under or pursuant to, or
result in the loss of a material benefit under, or give any right of
termination, amendment, acceleration or cancellation of, any organizational
document, agreement, contract, commitment, understanding or arrangement to which
such member is a party or by which it is bound, (e) as of the date of this
Agreement, Starboard is deemed to beneficially own in the aggregate 3,335,976
shares of Common Stock, (f) as of the date hereof, Starboard does not currently
have, and does not currently have any right to acquire or any interest in any
other securities of the Company (or any rights, options or other securities
convertible into or exercisable or exchangeable (whether or not convertible,
exercisable or exchangeable immediately or only after the passage of time or the
occurrence of a specified event) for such securities or any obligations measured
by the price or value of any securities of the Company or any of its controlled
Affiliates, including any swaps or other derivative arrangements designed to
produce economic benefits and risks that correspond to the ownership of Common
Stock, whether or not any of the foregoing would give rise to beneficial
ownership (as determined under Rule 13d-3 promulgated under the Exchange Act),
and whether or not to be settled by delivery of Common Stock, payment of cash or
by other consideration, and without regard to any short position under any such
contract or arrangement), (g) each of Norman R. Sorensen, the Additional
Starboard Nominee and any Starboard Replacement Director (other than a Starboard
Replacement Director for Peter A. Feld) is independent of Starboard, (h)
Starboard has not, directly or indirectly, compensated or agreed to, and will
not, compensate each of Norman R. Sorensen, the Additional Starboard Nominee and
any Starboard Replacement Director (other than a Starboard Replacement Director
for Peter A. Feld) for his or her respective service as a nominee or director of
the Company with any cash, securities (including any rights or options
convertible into or exercisable for or exchangeable into securities or any
profit sharing agreement or arrangement), or other form of compensation directly
or indirectly related to the Company or its securities, other than cash
compensation, if any, to be used by Norman R. Sorensen to purchase securities of
the Company, which compensation has been previously disclosed to the Company,
has been paid in full prior to the date hereof and Starboard has no remaining
compensation obligation to Norman R. Sorensen and (i) no person other than
Starboard has any rights with respect to the Shares.
5.Press Release.
Promptly following the execution of this Agreement, the Company and Starboard
shall jointly issue a mutually agreeable press release (the “Mutual Press
Release”) announcing certain terms of this Agreement, in the form attached
hereto as Exhibit C. Prior to the issuance of the Mutual Press Release and
subject to the terms of this Agreement, neither the Company (including the Board
and any committee or subcommittee thereof) nor Starboard shall issue any press
release or public announcement regarding this Agreement or the matters
contemplated hereby (including any recommendations or other findings of the
Independent Advisory Committee established pursuant to Section 1(b)) without the
prior written consent of the other Party. During the Standstill Period, neither
the Company nor Starboard or the Starboard Nominees shall make any public
announcement or statement that is inconsistent with or contrary to the
statements made in the Mutual Press Release, except as required by law or the
rules of any stock exchange or with the prior written consent of the other
Party, and otherwise in accordance with this Agreement.
6.Specific Performance.
Each of the members of Starboard, on the one hand, and the Company, on the other
hand, acknowledges and agrees that irreparable injury to the other Party hereto
would occur in the event any of the provisions of this Agreement were not
performed in accordance with their specific terms or were otherwise breached and
that such injury would not be adequately compensable by the remedies available
at law (including the payment of money damages). It is accordingly agreed that
Starboard (or any of the entities and natural persons listed in the signature
pages hereto), on the one hand, and the Company, on the other hand (the “Moving
Party”), shall each be entitled to specific enforcement of, and injunctive
relief to prevent any violation of, the terms hereof, and the other Party hereto
will not take action, directly or indirectly, in opposition to the Moving Party
seeking such relief on the grounds that any other remedy or relief is available
at law or in equity. This Section 6 is not the exclusive remedy for any
violation of this Agreement.

8

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Expenses.
The Company shall reimburse Starboard for its reasonable, documented
out-of-pocket fees and expenses (including legal expenses) incurred in
connection with the matters related to the 2015 Annual Meeting and the
negotiation and execution of this Agreement, provided that such reimbursement
shall not exceed $365,000 in the aggregate.
7.Severability.
If any term, provision, covenant or restriction of this Agreement is held by a
court of competent jurisdiction to be invalid, void or unenforceable, the
remainder of the terms, provisions, covenants and restrictions of this Agreement
shall remain in full force and effect and shall in no way be affected, impaired
or invalidated. It is hereby stipulated and declared to be the intention of the
Parties that the Parties would have executed the remaining terms, provisions,
covenants and restrictions without including any of such which may be hereafter
declared invalid, void or unenforceable. In addition, the Parties agree to use
their best efforts to agree upon and substitute a valid and enforceable term,
provision, covenant or restriction for any of such that is held invalid, void or
enforceable by a court of competent jurisdiction.

9.    Notices.
Any notices, consents, determinations, waivers or other communications required
or permitted to be given under the terms of this Agreement must be in writing
and will be deemed to have been delivered: (i) upon receipt, when delivered
personally; (ii) upon receipt, when sent by facsimile (provided confirmation of
transmission is mechanically or electronically generated and kept on file by the
sending Party); (iii) upon confirmation of receipt, when sent by email (provided
such confirmation is not automatically generated); or (iv) one (1) business day
after deposit with a nationally recognized overnight delivery service, in each
case properly addressed to the Party to receive the same. The addresses and
facsimile numbers for such communications shall be:
If to the Company: Insperity, Inc.
19001 Crescent Springs Drive
Kingwood, TX 77339
Attention: Dan Herink
Telephone: (832) 603-1216
Facsimile: (281) 348-2859
Email: Dan.Herink@insperity.com
With copies (which shall not constitute notice) to: Skadden, Arps, Slate,
Meagher & Flom LLP
4 Times Square
New York, NY 10036
Attention: Richard J. Grossman
Telephone: (212) 735-2116
Facsimile: (917) 777-2116
Email: Richard.Grossman@skadden.com
If to Starboard or any member thereof: Starboard Value LP
777 Third Avenue, 18th Floor
New York, NY 10017
Attention: Jeffrey C. Smith
Telephone: (212) 845-7955
Facsimile: (212) 845-7988
Email: JSmith@starboardvalue.com

9

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With a copy (which shall not constitute notice) to: Akin Gump Strauss Hauer &
Feld LLP
1 Bryant Park
New York, NY 10036
Attention: Jeffrey Kochian
Telephone: (212) 872-8069
Facsimile: (212) 872-1002
Email: JKochian@akingump.com

10.    Applicable Law.
This Agreement shall be governed by and construed and enforced in accordance
with the laws of the State of Delaware without reference to the conflict of laws
principles thereof. Each of the Parties hereto irrevocably agrees that any legal
action or proceeding with respect to this Agreement and the rights and
obligations arising hereunder, or for recognition and enforcement of any
judgment in respect of this Agreement and the rights and obligations arising
hereunder brought by the other Party hereto or its successors or assigns, shall
be brought and determined exclusively in the Delaware Court of Chancery and any
state appellate court therefrom within the State of Delaware (or, if the
Delaware Court of Chancery declines to accept jurisdiction over a particular
matter, any federal court within the State of Delaware). Each of the Parties
hereto hereby irrevocably submits with regard to any such action or proceeding
for itself and in respect of its property, generally and unconditionally, to the
personal jurisdiction of the aforesaid courts and agrees that it will not bring
any action relating to this Agreement in any court other than the aforesaid
courts. Each of the Parties hereto hereby irrevocably waives, and agrees not to
assert in any action or proceeding with respect to this Agreement, (i) any claim
that it is not personally subject to the jurisdiction of the above-named courts
for any reason, (ii) any claim that it or its property is exempt or immune from
jurisdiction of any such court or from any legal process commenced in such
courts (whether through service of notice, attachment prior to judgment,
attachment in aid of execution of judgment, execution of judgment or otherwise)
and (iii) to the fullest extent permitted by applicable legal requirements, any
claim that (A) the suit, action or proceeding in such court is brought in an
inconvenient forum, (B) the venue of such suit, action or proceeding is improper
or (C) this Agreement, or the subject matter hereof, may not be enforced in or
by such courts.
11.    Counterparts.
This Agreement may be executed in two or more counterparts, each of which shall
be considered one and the same agreement and shall become effective when
counterparts have been signed by each of the Parties and delivered to the other
Party (including by means of electronic delivery or facsimile).
12.    Mutual Non-Disparagement.
Subject to applicable law, each of the Parties covenants and agrees that, during
the Standstill Period or if earlier, until such time as the other Party or any
of its agents, subsidiaries, affiliates, successors, assigns, officers, key
employees or directors shall have breached this Section, neither it nor any of
its respective agents, subsidiaries, affiliates, successors, assigns, officers,
key employees or directors, shall in any way publicly criticize, disparage, call
into disrepute, or otherwise defame or slander the other Parties or such other
Parties’ subsidiaries, affiliates, successors, assigns, officers (including any
current officer of a Party or a Parties’ subsidiaries who no longer serves in
such capacity following the execution of this Agreement), directors (including
any current director of a Party or a Parties’ subsidiaries who no longer serves
in such capacity following the execution of this Agreement), employees,
stockholders, agents, attorneys or representatives, or any of their businesses,
products or services, in any manner that would reasonably be expected to damage
the business or reputation of such other Parties, their businesses, products or
services or their subsidiaries, affiliates, successors, assigns, officers (or
former officers), directors (or former directors), employees, stockholders,
agents, attorneys or representatives. This Section shall not limit the ability
of any director of the Company to act in accordance with his or her fiduciary
duties or otherwise in accordance with applicable law.
13.     Confidentiality.
The Company hereby agrees that: (i) Peter A. Feld, if he wishes to do so, is
permitted to and may provide confidential information to Starboard and its
Affiliates provided that prior to providing any such confidential information,
Peter A. Feld and the appropriate Starboard entities execute a confidentiality
agreement (the

10

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“Confidentiality Agreement”) and (ii) the Company will execute and deliver the
Confidentiality Agreement to Starboard substantially contemporaneously with
execution and delivery thereof by the other signatories thereto.

14.    Entire Agreement; Amendment and Waiver; Successors and Assigns; Third
Party Beneficiaries.
This Agreement contains the entire understanding of the Parties hereto with
respect to its subject matter. There are no restrictions, agreements, promises,
representations, warranties, covenants or undertakings between the Parties other
than those expressly set forth herein. No modifications of this Agreement can be
made except in writing signed by an authorized representative of each the
Company and Starboard. No failure on the part of any Party to exercise, and no
delay in exercising, any right, power or remedy hereunder shall operate as a
waiver thereof, nor shall any single or partial exercise of such right, power or
remedy by such Party preclude any other or further exercise thereof or the
exercise of any other right, power or remedy. All remedies hereunder are
cumulative and are not exclusive of any other remedies provided by law. The
terms and conditions of this Agreement shall be binding upon, inure to the
benefit of, and be enforceable by the Parties hereto and their respective
successors, heirs, executors, legal representatives, and permitted assigns. No
Party shall assign this Agreement or any rights or obligations hereunder
without, with respect to any member of Starboard, the prior written consent of
the Company, and with respect to the Company, the prior written consent of
Starboard. This Agreement is solely for the benefit of the Parties hereto and is
not enforceable by any other persons.
[The remainder of this page intentionally left blank]

11

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IN WITNESS WHEREOF, this Agreement has been duly executed and delivered by the
duly authorized signatories of the Parties as of the date hereof.

By:    /s/ Paul J. Sarvadi
Name: Paul J. Sarvadi
Title: Chairman of the Board and Chief Executive Officer

[Signature Page to Agreement]

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STARBOARD VALUE AND OPPORTUNITY MASTER FUND LTD
By: Starboard Value LP, its investment manager    

STARBOARD VALUE AND OPPORTUNITY S LLC    
By: Starboard Value LP, its manager    

STARBOARD PRINCIPAL CO GP LLC
STARBOARD VALUE LP
By: Starboard Value GP LLC, its general partner
STARBOARD VALUE GP LLC
By: Starboard Principal Co LP, its member

STARBOARD PRINCIPAL CO LP
By: Starboard Principal Co GP LLC, its general partner

STARBOARD VALUE AND OPPORTUNITY C LP
By: Starboard Value R LP, its general partner

STARBOARD VALUE R LP
By: Starboard Value R GP LLC, its general partner

STARBOARD VALUE R GP LLC
By: /s/ Peter A. Feld    
Name: Peter A. Feld
Title: Authorized Signatory

By: /s/ Peter A. Feld    
Name: Peter A. Feld
Individually and as attorney-in-fact for Mark R.
Mitchell and Jeffrey C. Smith

[Signature Page to Agreement]

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EXHIBIT A
STARBOARD VALUE AND OPPORTUNITY MASTER FUND LTD
STARBOARD VALUE AND OPPORTUNITY S LLC
STARBOARD VALUE LP
STARBOARD VALUE GP LLC
STARBOARD PRINCIPAL CO LP
STARBOARD PRINCIPAL CO GP LLC
STARBOARD VALUE AND OPPORTUNITY C LP
STARBOARD VALUE R LP
STARBOARD VALUE R GP LLC
JEFFREY C. SMITH
MARK R. MITCHELL
PETER A. FELD
KENNETH H. TRAUB

[Exhibit A]

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EXHIBIT B

INDEPENDENT ADVISORY COMMITTEE CHARTER

Insperity, Inc.
Independent Advisory Committee

Purpose
An advisory committee, entitled the Independent Advisory Committee (the
“Committee”), is appointed by the Board of Directors (the “Board”) of Insperity,
Inc. (the “Company”) to (i) review the Company’s business and (ii) make 
recommendations to the Board regarding capital allocation (including, but not
limited to, with respect to dividends and stock repurchases), and targeted
ranges of Adjusted EBITDA Margins (including, but not limited to, with respect
to all advertising, general & administrative and corporate perquisite expenses),
while taking into consideration the Company’s risk profile and the potential
impact of any recommended change on the Company’s business model and strategic
plan.
“Adjusted EBITDA Margins” means the quotient of Adjusted EBITDA for any period
divided by the gross profit for such period (as shown on the Company’s
consolidated statements of operations on a consolidated basis for such period).
“Adjusted EBITDA” means for the Company and its subsidiaries, on a consolidated
basis for any period, the sum of (a) the operating income for such period, plus
(b) depreciation and amortization for such period, plus (c) non-cash stock based
compensation expense for such period, plus (d) the sum of all interest income
for such period, plus (e) extraordinary or non-recurring expenses or charges
incurred in connection with any transaction or other strategic events approved
by the Board, including any related advisory fees, during such period, plus (f)
any non-cash write-off for impairment of long lived assets (including goodwill,
intangible assets and fixed assets such as property, plant and equipment), or of
deferred financing fees or investments in debt and equity securities during such
period, plus (g) any non-cash impact of accounting changes or restatements
during such period; provided, however, that the amounts of each of the items set
forth in the clauses above shall include, for the first twelve (12) months after
any acquisition, the actual historical amounts of such items for any person
which is acquired by the Company or any of its subsidiaries in such acquisition.
Membership and Meetings
The Committee shall consist of four (4) directors.  Subject to the terms of any
agreement to which the Company may be party to, the members of the Committee
shall be appointed and may be removed, solely for cause, by a majority vote of
the Board in its discretion, and shall serve for such term as the Board
determines or until their successors are elected or appointed. Subject to the
terms of any agreement to which the Company may be party to, the members of the
Committee shall meet the independence requirements of the listing standards of
The New York Stock Exchange.
The Committee shall (i) meet as often as its members shall determine to be
necessary, or as meetings may be called by the Chair of the Committee, any three
(3) members of the Committee or the Chairman of the Board and (ii) hold meetings
on at least two business days’ prior written notice or such shorter period as
the members of the Committee agree to. The Committee shall keep minutes and
other relevant documentation of all meetings held. Subject to the terms of any
agreement to which the Company may be party to, the Board shall appoint one
member of the Committee as Chair.  The Chair of the Committee shall be
responsible for scheduling all meetings of the Committee, determining the agenda
for each meeting (following consultation with other members of the Committee),
ensuring that the agenda for each meeting is circulated to each Committee member
in advance of the meeting, presiding over meetings of the Committee and
coordinating reporting to the Board.  A vote of a majority of all members will
constitute an act of the Committee.

[Exhibit B]

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The Chairman of the Board and Chief Executive Officer shall be (i) invited but
not required to participate in all meetings of the Committee, (ii) informed in
writing of all information requests of the Committee to the Company’s management
and (iii) provided with copies of all information and reports provided to the
Committee; provided, that at any time the Committee may either (i) with the
approval of at least three (3) of its members or (ii) with respect to any matter
related to or concerning the Chairman of the Board and Chief Executive Officer,
recuse the Chairman of the Board and Chief Executive Officer from all or any
portion of any meeting of the Committee or from receiving information provided
to the Committee; and provided, further, that each meeting of the Committee
shall include an executive session without the presence or participation of the
Chairman of the Board and Chief Executive Officer or other members of the
Company’s management team. Prior to finalizing or making any recommendations to
the Board, the Committee shall preview all preliminary recommendations with the
Chairman of the Board and Chief Executive Officer and provide the Chairman of
the Board and Chief Executive Officer a reasonable opportunity to provide input
and further information concerning such recommendations; provided, that at any
time the Committee may either (i) with the approval of at least three (3) of the
members of the Committee or (ii) with respect to any matter related to or
concerning the Chairman of the Board and Chief Executive Officer, recuse the
Chairman of the Board and Chief Executive Officer from such preview and input
period. The Committee shall have reasonable access to members of management, and
management shall furnish to the Committee such financial information,
projections and other information, support and cooperation as the Committee
reasonably requests to assist it in performing its duties. In addition, the
Committee may obtain reasonable assistance from officers of the Company,
nationally-recognized external consultants specializing in corporate costs and
expenses or management consulting for sales-oriented services companies and
legal and financial advisors engaged by the Company (excluding, for the
avoidance of doubt, any external legal or financial advisors other than those
engaged by the Company), with the reasonable expenses incurred in their use to
be paid by the Company.
The Committee shall make regular reports to the Board, and all recommendations
of the Committee shall be reported to the Board at the next regular meeting of
the Board.
The Committee shall remain in effect through the earlier of (i) the date that is
fifteen business days prior to the deadline for the submission of stockholder
nominations for the 2016 annual meeting of stockholders pursuant to the
Company’s Amended and Restated Bylaws and (ii) the date that is one hundred days
prior to the first anniversary of the 2015 annual meeting of stockholders, and,
if determined by the Board, thereafter.
Duties and Responsibilities
The Committee shall:
1.
Review the Company’s business and make recommendations to the Board regarding
capital allocation (including but not limited to, with respect to dividends and
stock repurchases) and targeted ranges for Adjusted EBITDA Margins (including,
but not limited to, with respect to all advertising, general and administrative
and corporate perquisite expenses), while taking into consideration the
Company’s risk profile and the potential impact of any recommended change on the
Company’s business model and strategic plan.

2.
Recommend to the Board a Lead Independent Director to serve for a one-year term
at or promptly after the first meeting of the newly constituted Board following
the appointment of Peter A. Feld and Norman R. Sorensen to the Board pursuant to
the that certain Agreement, dated as of March 21, 2015, between Starboard Value
LP and certain of its named affiliates and the Company.

3.
Recommend targeted ranges of Company Adjusted EBITDA Margins for fiscal years
2015 and 2016 to the Board within sixty (60) days following the 2015 annual
meeting of stockholders, provided that the Board will have the right to review
and approve such proposed targets.

4.
Exercise such other duties and responsibilities as may be expressly assigned by
the Board from time to time.

1

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EXHIBIT C

PRESS RELEASE

Insperity and Starboard Reach Agreement on Board Composition and Establish New
Independent Advisory Committee

HOUSTON - March 23, 2015 - Insperity, Inc. (NYSE: NSP), a leading provider of
human resources and business performance solutions for America’s best
businesses, today announced that its Board of Directors has reached an agreement
with Starboard Value LP (together with its affiliates, “Starboard”), its largest
shareholder, in advance of the Company’s 2015 annual meeting of shareholders.

Under the terms of the agreement, Starboard has agreed to vote all of its shares
at the upcoming annual meeting in favor of the Company’s incumbent Class II
directors, who are Paul Sarvadi, Chairman and Chief Executive Officer, Carol
Kaufmann, Lead Independent Director, and Austin Young, Chairman of the Finance
and Risk Management Committee. The agreement also calls for the immediate
appointment of two new directors to the Board of Directors (Norman Sorensen and
Peter Feld, who will be the only nominee affiliated with Starboard) and the
later appointment of a third director nominated by Starboard. Two existing
directors, Paul Lattanzio and Jack Fields, who had decided not to seek
re-election when their terms expire in 2016, have announced their decisions to
depart from the Board immediately following the 2015 annual meeting. In
addition, Starboard has agreed to customary standstill restrictions.

Pursuant to the agreement, the Board has created a new independent advisory
committee to review the Company’s business and make recommendations to the Board
regarding capital allocation, expenses and targeted ranges for Adjusted EBITDA
Margins, as defined in the agreement, while taking into consideration the
Company’s risk profile and the potential impact of any recommendations on the
Company’s business model and strategic plan. The new committee consists of two
current independent directors and two Starboard nominees, including Mr. Feld,
who chairs the committee. The committee will evaluate Insperity’s cost structure
and

recommend targeted ranges for Adjusted EBITDA Margins for fiscal years 2015 and
2016, which the Board will have the right to review and approve. Subject to the
approval of such recommendations by the Board, the Company will issue a press
release or public announcement discussing such approved recommendations no later
than the second quarter fiscal year 2015 earnings announcement.

“This agreement represents the best possible outcome for all of our
shareholders. We look forward to working with the new directors toward our
common goal of enhancing long-term shareholder value and continuing our strong
business momentum,” said Mr. Sarvadi. “I want to express my sincere gratitude to
Mr. Lattanzio and Mr. Fields for their many years of commitment and
distinguished service on the Board, which helped oversee our recently completed
business transformation.”

[Exhibit C]
2

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Peter Feld, on behalf of Starboard, stated: “As the Company’s largest
shareholder, we recognize the value of Insperity’s platform and are pleased to
join the Board. We believe the addition of new independent directors will bring
a fresh perspective to the boardroom and we look forward to working
constructively with the incumbent Board members to enhance shareholder value.”

The new directors qualify as “independent” directors under the New York Stock
Exchange’s governance rules. Mr. Sorensen has been appointed as a Class II
director and the Board unanimously recommends that shareholders elect him at the
upcoming annual meeting. Mr. Feld has been and the future nominee of Starboard
will be appointed as Class I directors and will be subject to the election by
shareholders at the annual meeting in 2017. One or more new directors will be
named to serve on each of the Board’s existing committees.

Additionally, the Company has been in the process of exploring alternatives
regarding the Company’s two aircraft, including the possible sale of the
aircraft. However, pursuant to the agreement with Starboard, the Company is
announcing its intent to commence activities to market the aircraft for sale.
The Company is in the process of initiating an appraisal of the aircraft to
determine the current market values. In the event that the current market values
are less than the Company’s book value of the aircraft, then the Company would
incur an impairment loss equal to the difference.

The agreement will be filed by the Company with the U.S. Securities and Exchange
Commission as an exhibit to a Current Report on Form 8-K.

Peter Feld is a Managing Member and Head of Research of Starboard Value LP, a
New York-based investment adviser with a focused and fundamental approach to
investing in publicly traded U.S. companies (“Starboard Value LP”), a position
he has held since April 2011. From November 2008 to April 2011, Mr. Feld served
as a Managing Director of Ramius LLC and a Portfolio Manager of Ramius Value and
Opportunity Master Fund Ltd. From February 2007 to November 2008, Mr. Feld
served as a Director at Ramius LLC. Since October 2014, Mr. Feld has served as a
member of the board of directors of Darden Restaurants, Inc. (“Darden”), a full
service restaurant company. Mr. Feld has also served as a member of the board of
directors of Tessera Technologies, Inc., which develops, invests in, licenses
and delivers innovative miniaturization technologies and products for
next-generation electronic devices, since June 2013. Mr. Feld previously served
on the board of directors of Integrated Device Technology, Inc., a company which
designs, develops, manufactures and markets a range of semiconductor solutions
for the advanced communications, computing and consumer industries, from June
2012 until February 2014. Mr. Feld received a BA in economics from Tufts
University.

Norman Sorensen formerly served as Chairman of the International Insurance
Society, Inc., a professional organization for the insurance industry, from
January 2010 until June 2013. Mr. Sorensen has served as a director of the
International Insurance Society, Inc. since January 2005. Previously, from
November 2011 until December 2012, he was Chairman of the International Advisory
Council of Principal Financial Group, Inc., a global financial investment
management company. He was Chairman of Principal International, Inc., serving
from June 2011 to October 2012, and President and CEO of International Asset
Management and Accumulation of Principal International, Inc., serving from
January 2001 to June 2011. Mr. Sorensen has served as a director

[Exhibit C]
3

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of Encore Capital Group, Inc., a consumer banking company, since November 2011.
Mr. Sorensen also served as a director of Sara Lee Corporation, an American
consumer-goods company, from January 2007 to November 2011. He has served as
Executive Vice President of both Principal Financial Group Inc. and Principal
Life Insurance Company, a life insurance company, since January 2007, as well as
having held a number of other senior management positions since 1998. Mr.
Sorensen also served as Chairman of the U.S. Coalition of Service Industries, a
leading forum for the services sector, from January 2003 to March 2005. Mr.
Sorensen served as a senior executive of American International Group, Inc., an
insurance services company, from September 1989 to December 1998. He also
formerly served as Chairman and director of DE Master Blenders, from December
2011 until September 2013.

About Insperity

Insperity, a trusted advisor to America’s best businesses for more than 28
years, provides an array of human resources and business solutions designed to
help improve business performance. Insperity® Business Performance Advisors
offer the most comprehensive suite of products and services available in the
marketplace. Insperity delivers administrative relief, better benefits, reduced
liabilities and a systematic way to improve productivity through its premier
Workforce Optimization® solution. Additional company offerings include Human
Capital Management, Payroll Services, Time and Attendance, Performance
Management, Organizational Planning, Recruiting Services, Employment Screening,
Financial Services, Expense Management, Retirement Services and Insurance
Services. Insperity business performance solutions support more than 100,000
businesses with over 2 million employees. With 2014 revenues of $2.4 billion,
Insperity operates in 57 offices throughout the United States. For more
information, visit http://www.insperity.com.

About Starboard Value LP

Starboard Value LP is a New York-based investment adviser with a focused and
fundamental approach to investing in publicly traded U.S. companies. Starboard
invests in deeply undervalued companies and actively engages with management
teams and boards of directors to identify and execute on opportunities to unlock
value for the benefit of all shareholders.

The statements contained herein that are not historical facts are
forward-looking statements within the meaning of the federal securities laws
(Section 27A of the Securities Act of 1933 and Section 21E of the Securities
Exchange Act of 1934). You can identify such forward-looking statements by the
words “expects,” “intends,” “plans,” “projects,” “believes,” “estimates,”
“likely,” “possibly,” “probably,” “goal,” “opportunity,” “objective,” “target,”
“assume,” “outlook,” “guidance,” “predicts,” “appears,” “indicator” and similar
expressions. Forward-looking statements involve a number of risks and
uncertainties. In the normal course of business, Insperity, Inc., in an effort
to help keep our stockholders and the public informed about our operations, may
from time to time issue such forward-looking statements, either orally or in
writing. Generally, these statements relate to business plans or strategies,
projected or anticipated benefits or other consequences of such plans or
strategies, or projections involving anticipated revenues, earnings, unit
growth, profit per worksite employee, pricing, operating expenses or other
aspects of operating results. We base the forward-looking statements on our
expectations, estimates and projections at the time such statements are
made. These statements are not guarantees of future performance and

[Exhibit C]
4

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involve risks and uncertainties that we cannot predict. In addition, we have
based many of these forward-looking statements on assumptions about future
events that may prove to be inaccurate. Therefore, the actual results of the
future events described in such forward-looking statements could differ
materially from those stated in such forward-looking statements. Among the
factors that could cause actual results to differ materially are: (i) adverse
economic conditions; (ii) regulatory and tax developments and possible adverse
application of various federal, state and local regulations; (iii) the ability
to secure competitive replacement contracts for health insurance and workers’
compensation contracts at expiration of current contracts; (iv) increases in
health insurance costs and workers’ compensation rates and underlying claims
trends, health care reform, financial solvency of workers’ compensation
carriers, other insurers or financial institutions, state unemployment tax
rates, liabilities for employee and client actions or payroll-related claims;
(v) failure to manage growth of our operations and the effectiveness of our
sales and marketing efforts; (vi) the competitive environment in the PEO
industry may impact growth and/or profitability; (vii) our liability for
worksite employee payroll, payroll taxes and benefits costs; (viii) our
liability for disclosure of sensitive or private information; (ix) our ability
to integrate or realize expected returns on our acquisitions; (x) failure of our
information technology systems; (xi) an adverse final judgment or settlement of
claims against Insperity; and (xii) the actions of certain stockholders that
could disrupt our business. These factors are discussed in further detail in
Insperity’s filings with the U.S. Securities and Exchange Commission. Any of
these factors, or a combination of such factors, could materially affect the
results of our operations and whether forward-looking statements we make
ultimately prove to be accurate.
 
Except to the extent otherwise required by federal securities law, we do not
undertake any obligation to update our forward-looking statements to reflect
events or circumstances after the date they are made or to reflect the
occurrence of unanticipated events.

Important Additional Information

Insperity, its directors and certain of its executive officers and employees may
be deemed to be participants in the solicitation of proxies from Insperity
stockholders in connection with the matters to be considered at Insperity’s 2015
annual meeting. Insperity plans to file a proxy
statement and proxy card with the U.S. Securities and Exchange Commission in
connection with the 2015 annual meeting. INSPERITY STOCKHOLDERS ARE STRONGLY
ENCOURAGED TO READ THE 2015 PROXY STATEMENT AND ACCOMPANYING PROXY CARD
(INCLUDING ANY AMENDMENTS OR SUPPLEMENTS THERETO) WHEN THEY BECOME AVAILABLE
BECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION. Information regarding the
identity of potential participants, and their direct or indirect interests, by
security holdings or otherwise, will be set forth in the proxy statement and
other materials to be filed with the SEC in connection with the 2015 annual
meeting. Stockholders will be able to obtain the proxy statement, any amendments
or supplements to the proxy statement and other documents filed by Insperity
with the SEC for no charge at the SEC’s website at http://www.sec.gov/. Copies
will also be available at no charge at the Investor Relations section of our
corporate website at http://www.insperity.com.
###

[Exhibit C]
5