Exhibit 10.5

RADIUS HEALTH, INC.
2018 STOCK OPTION AND INCENTIVE PLAN
SECTION 1. GENERAL PURPOSE OF THE PLAN; DEFINITIONS
The name of the plan is the Radius Health, Inc. 2018 Stock Option and Incentive
Plan (the “Plan”). The purpose of the Plan is to encourage and enable the
officers, employees, Non-Employee Directors and Consultants of Radius Health,
Inc. (the “Company”) and its Subsidiaries upon whose judgment, initiative and
efforts the Company largely depends for the successful conduct of its businesses
to acquire a proprietary interest in the Company. It is anticipated that
providing such persons with a direct stake in the Company’s welfare will assure
a closer identification of their interests with those of the Company and its
stockholders, thereby stimulating their efforts on the Company’s behalf and
strengthening their desire to remain with the Company.
The following terms shall be defined as set forth below:
“2011 Plan” means the Company’s 2011 Equity Incentive Plan (as amended and
restated).
“Act” means the Securities Act of 1933, as amended, and the rules and
regulations thereunder.
“Administrator” means either the Board or the compensation committee of the
Board or a similar committee performing the functions of the compensation
committee and which is comprised of not less than two Non-Employee Directors who
are independent.
“Award” or “Awards,” except where referring to a particular category of grant
under the Plan, shall include Incentive Stock Options, Non-Qualified Stock
Options, Stock Appreciation Rights, Restricted Stock Units, Restricted Stock
Awards, Unrestricted Stock Awards and Dividend Equivalent Rights.
“Award Certificate” means a written or electronic document setting forth the
terms and provisions applicable to an Award granted under the Plan. Each Award
Certificate is subject to the terms and conditions of the Plan.
“Board” means the Board of Directors of the Company.
“Change of Control” means the occurrence of any of the following after the date
of the approval of the Plan by the Board:
(a) (i) any merger or consolidation of the Company with or into another entity
as a result of which the Stock of the Company is converted into or exchanged for
the right to receive cash, securities or other property or is cancelled, (ii)
any sale or exchange of all of the Stock of the Company for cash, securities or
other property, (iii) any sale, transfer, or other

--------------------------------------------------------------------------------

disposition of all or substantially all of the Company’s assets to one or more
other persons in a single transaction or series of related transactions or (iv)
any liquidation or dissolution of the Company, in each case, unless securities
possessing more than 50 percent of the total combined voting power of the
survivor’s or acquiror’s outstanding securities (or the securities of any parent
thereof) are held by a person or persons who held securities possessing more
than 50 percent of the total combined voting power of the Company’s outstanding
securities immediately prior to that transaction; or
(b) any person or group of persons (within the meaning of Section 13(d)(3) of
the Exchange Act) directly or indirectly acquires, including, but not limited
to, by means of a merger or consolidation, beneficial ownership (determined
pursuant to Securities and Exchange Commission Rule 13d-3 promulgated under the
Exchange Act) of securities possessing more than 30 percent of the total
combined voting power of the Company’s outstanding securities, unless pursuant
to a tender or exchange offer made directly to the Company’s stockholders that
the Board recommends such stockholders accept, other than (i) the Company or an
Affiliate, (ii) an employee benefit plan of the Company or any of its
Affiliates, (iii) a trustee or other fiduciary holding securities under an
employee benefit plan of the Company or any of its Affiliates, or (iv) an
underwriter temporarily holding securities pursuant to an offering of such
securities; or
(c) over a period of thirty-six (36) consecutive months or less there is a
change in the composition of the Board such that a majority of the Board members
(rounded up to the next whole number, if a fraction) ceases, by reason of one or
more proxy contests for the election of Board members, to be composed of
individuals who either (i) have been Board members continuously since the
beginning of that period, or (ii) have been elected or nominated for election as
Board members during such period by at least a majority of the Board members
described in the preceding clause (i) who were still in office at the time that
election or nomination was approved by the Board.
In addition and notwithstanding the foregoing, if a Change of Control
constitutes a payment event with respect to any Award which provides for the
deferral of compensation and is subject to Section 409A of the Code, the
transaction or event described in subsection (a), (b) or (c) with respect to
such Award must also constitute a “change in control event,” as defined in
Treasury Regulation §1.409A-3(i)(5) to the extent required by Section 409A.
“Code” means the Internal Revenue Code of 1986, as amended, and any successor
Code, and related rules, regulations and interpretations.
“Consultant” means any natural person that provides bona fide services to the
Company, and such services are not in connection with the offer or sale of
securities in a capital-raising transaction and do not directly or indirectly
promote or maintain a market for the Company’s securities.
“Dividend Equivalent Right” means an Award entitling the grantee to receive
credits based on cash dividends that would have been paid on the shares of Stock
specified in the Dividend Equivalent Right (or other award to which it relates)
if such shares had been issued to and held by the grantee.

2

--------------------------------------------------------------------------------

“Effective Date” means the date on which the Plan becomes effective as set forth
in Section 18.
“Exchange Act” means the Securities Exchange Act of 1934, as amended, and the
rules and regulations thereunder.
“Market Value” of the Stock on any given date means the fair market value of the
Stock determined in good faith by the Administrator; provided, however, that if
the Stock is admitted to quotation on the National Association of Securities
Dealers Automated Quotation System (“NASDAQ”), NASDAQ Global Market or another
national securities exchange, the determination shall be made by reference to
market quotations. If there are no market quotations for such date, the
determination shall be made by reference to the last date preceding such date
for which there are market quotations.
“Incentive Stock Option” means any Stock Option designated and qualified as an
“incentive stock option” as defined in Section 422 of the Code.
“Non-Employee Director” means a member of the Board who is not also an employee
of the Company or any Subsidiary.
“Non-Qualified Stock Option” means any Stock Option that is not an Incentive
Stock Option.
“Option” or “Stock Option” means any option to purchase shares of Stock granted
pursuant to Section 5.
“Restricted Shares” means the shares of Stock underlying a Restricted Stock
Award that remain subject to a risk of forfeiture or the Company’s right of
repurchase.
“Restricted Stock Award” means an Award of Restricted Shares subject to such
restrictions and conditions as the Administrator may determine at the time of
grant.
“Restricted Stock Units” means an Award of stock units subject to such
restrictions and conditions as the Administrator may determine at the time of
grant.
“Sale Price” means the value as determined by the Administrator of the
consideration payable, or otherwise to be received by stockholders, per share of
Stock pursuant to a Change of Control.
“Section 409A” means Section 409A of the Code and the regulations and other
guidance promulgated thereunder.
“Service Relationship” means any relationship as a full-time employee, part-time
employee, director or other key person (including Consultants) of the Company or
any Subsidiary or any successor entity. A grantee’s Service Relationship shall
be deemed to continue without interruption in the event such individual’s status
in rendering services to the Company or any Subsidiary or any successor entity
changes, without interruption, from one capacity to

3

--------------------------------------------------------------------------------

another, for example, from a full-time employee to part-time employee or
Consultant, or from a director to Consultant.
“Stock” means the Common Stock, par value $0.0001 per share, of the Company,
subject to adjustments pursuant to Section 3.
“Stock Appreciation Right” means an Award entitling the recipient to receive
shares of Stock (or cash, to the extent explicitly provided for in the
applicable Award Certificate) having a value equal to the excess of the Market
Value of the Stock on the date of exercise over the exercise price of the Stock
Appreciation Right multiplied by the number of shares of Stock with respect to
which the Stock Appreciation Right shall have been exercised.
“Subsidiary” means any corporation or other entity (other than the Company) in
which the Company has at least a 50 percent interest, either directly or
indirectly.
“Ten Percent Owner” means an employee who owns or is deemed to own (by reason of
the attribution rules of Section 424(d) of the Code) more than 10 percent of the
combined voting power of all classes of stock of the Company or any parent or
subsidiary corporation.
“Unrestricted Stock Award” means an Award of shares of Stock free of any
restrictions.
SECTION 2. ADMINISTRATION OF PLAN; ADMINISTRATOR AUTHORITY TO SELECT GRANTEES
AND DETERMINE AWARDS
(a)    Administration of Plan. The Plan shall be administered by the
Administrator.
(b)    Powers of Administrator. The Administrator shall have the power and
authority to grant Awards consistent with the terms of the Plan, including the
power and authority:
(i)    to select the individuals to whom Awards may from time to time be
granted;
(ii)    to determine the time or times of grant, and the extent, if any, of
Incentive Stock Options, Non-Qualified Stock Options, Stock Appreciation Rights,
Restricted Stock Awards, Restricted Stock Units, Unrestricted Stock Awards and
Dividend Equivalent Rights, or any combination of the foregoing, granted to any
one or more grantees;
(iii)    to determine the number of shares of Stock to be covered by any Award;
(iv)    to determine and modify from time to time the terms and conditions,
including restrictions, not inconsistent with the terms of the Plan, of any
Award, which terms and conditions may differ among individual Awards and
grantees, and to approve the forms of Award Certificates;
(v)    to accelerate at any time the exercisability or vesting of all or any
portion of any Award;

4

--------------------------------------------------------------------------------

(vi)    subject to the provisions of Section 5(c), to extend at any time the
period in which Stock Options may be exercised; and
(vii)    at any time to adopt, alter and repeal such rules, guidelines and
practices for administration of the Plan and for its own acts and proceedings as
it shall deem advisable; to interpret the terms and provisions of the Plan and
any Award (including related written instruments); to make all determinations it
deems advisable for the administration of the Plan; to decide all disputes
arising in connection with the Plan; and to otherwise supervise the
administration of the Plan.
All decisions and interpretations of the Administrator shall be binding on all
persons, including the Company and Plan grantees.
(c)    Delegation of Authority to Grant Awards. Subject to applicable law, the
Administrator, in its discretion, may delegate to a committee consisting of one
or more officers of the Company (including the Chief Executive Officer) all or
part of the Administrator’s authority and duties with respect to the granting of
Awards to individuals who are (i) not subject to the reporting and other
provisions of Section 16 of the Exchange Act and (ii) not members of the
delegated committee. Any such delegation by the Administrator shall include a
limitation as to the amount of Stock underlying Awards that may be granted
during the period of the delegation and shall contain guidelines as to the
determination of the exercise price and the vesting criteria. The Administrator
may revoke or amend the terms of a delegation at any time but such action shall
not invalidate any prior actions of the Administrator’s delegate or delegates
that were consistent with the terms of the Plan.
(d)    Award Certificate. Awards under the Plan shall be evidenced by Award
Certificates that set forth the terms, conditions and limitations for each Award
which may include, without limitation, the term of an Award and the provisions
applicable in the event the Service Relationship terminates.
(e)    Indemnification. Neither the Board nor the Administrator, nor any member
of either or any delegate thereof, shall be liable for any act, omission,
interpretation, construction or determination made in good faith in connection
with the Plan, and the members of the Board and the Administrator (and any
delegate thereof) shall be entitled in all cases to indemnification and
reimbursement by the Company in respect of any claim, loss, damage or expense
(including, without limitation, reasonable attorneys’ fees) arising or resulting
therefrom to the fullest extent permitted by law and/or under the Company’s
certificate of incorporation or bylaws or any directors’ and officers’ liability
insurance coverage which may be in effect from time to time and/or any
indemnification agreement between such individual and the Company.
(f)    Foreign Award Recipients. Notwithstanding any provision of the Plan to
the contrary, in order to comply with the laws in other countries in which the
Company and its Subsidiaries operate or have employees or other individuals
eligible for Awards, the Administrator, in its sole discretion, shall have the
power and authority to: (i) determine which Subsidiaries shall be covered by the
Plan; (ii) determine which individuals outside the United States are eligible to
participate in the Plan; (iii) modify the terms and conditions of any Award

5

--------------------------------------------------------------------------------

granted to individuals outside the United States to comply with applicable
foreign laws; (iv) establish subplans and modify exercise procedures and other
terms and procedures, to the extent the Administrator determines such actions to
be necessary or advisable (and such subplans and/or modifications shall be
attached to this Plan as appendices); provided, however, that no such subplans
and/or modifications shall increase the share limitations contained in Section
3(a) hereof; and (v) take any action, before or after an Award is made, that the
Administrator determines to be necessary or advisable to obtain approval or
comply with any local governmental regulatory exemptions or approvals.
Notwithstanding the foregoing, the Administrator may not take any actions
hereunder, and no Awards shall be granted, that would violate the Exchange Act
or any other applicable United States securities law, the Code, or any other
applicable United States governing statute or law.
(g)    Minimum Vesting. Notwithstanding any other provision of the Plan or the
relevant Award Certificate, but subject to Section 3(d), Awards (other than
cash-settled Awards or Awards elected by a Director in lieu of a cash retainer)
under the Plan granted to a grantee shall not vest earlier than the date that is
one year following the date the Award is approved by the Administrator or its
delegate pursuant to Section 2(c); provided, however, that, notwithstanding the
foregoing, Awards that result in the issuance of an aggregate of up to five
percent of the maximum number of shares available for issuance under Section
3(a) may be granted to any one or more grantees without respect to such minimum
vesting provision. Nothing in this Section shall preclude the Administrator from
taking action, in its sole discretion, to accelerate the vesting of any Award in
connection with or following a grantee’s death, disability or termination of
Service Relationship or the consummation of a Change of Control.
SECTION 3. STOCK ISSUABLE UNDER THE PLAN; MERGERS; SUBSTITUTION
(a)    Stock Issuable. The maximum number of shares of Stock reserved and
available for issuance under the Plan shall be the sum of (i) 3,500,000 shares
and (ii) the shares of Stock remaining available for issuance under the 2011
Plan, subject to adjustment as provided in this Section 3. Subject to such
overall limitations, shares of Stock may be issued up to such maximum number
pursuant to any type or types of Award; provided, however, that no more than
3,500,000 shares of Stock may be issued in the form of Incentive Stock Options.
For purposes of this limitation, the shares of Stock underlying any awards under
the Plan or under the 2011 Plan that are forfeited, canceled, reacquired by the
Company prior to vesting, satisfied without the issuance of Stock or otherwise
terminated (other than by exercise) shall be added back to the shares of Stock
available for issuance under the Plan. In the event the Company repurchases
shares of Stock on the open market, such shares shall not be added to the shares
of Stock available for issuance under the Plan. The shares available for
issuance under the Plan may be authorized but unissued shares of Stock or shares
of Stock reacquired by the Company.
(b)    Non-Employee Director Awards. Notwithstanding anything to the contrary in
this Plan, the value of all Awards awarded under this Plan and all other cash
compensation paid by the Company to any Non-Employee Director in any calendar
year shall not exceed $950,000; provided, however, that this limitation shall
not apply with respect to any Awards granted in connection with a Non-Employee
Director’s initial election or appointment to serve on the

6

--------------------------------------------------------------------------------

Board. For the purpose of this limitation, the value of any Award shall be its
grant date fair value, as determined in accordance with ASC 718 or successor
provision, but excluding the impact of estimated forfeitures related to
service-based vesting provisions.
(c)    Changes in Stock. Subject to Section 3(d) hereof, if, as a result of any
reorganization, recapitalization, reclassification, stock dividend, stock split,
reverse stock split or other similar change in the Company’s capital stock, the
outstanding shares of Stock are increased or decreased or are exchanged for a
different number or kind of shares or other securities of the Company, or
additional shares or new or different shares or other securities of the Company
or other non-cash assets are distributed with respect to such shares of Stock or
other securities, or, if, as a result of any merger or consolidation, sale of
all or substantially all of the assets of the Company, the outstanding shares of
Stock are converted into or exchanged for securities of the Company or any
successor entity (or a parent or subsidiary thereof), the Administrator shall
make an appropriate or proportionate adjustment in (i) the maximum number of
shares reserved for issuance under the Plan, including the maximum number of
shares that may be issued in the form of Incentive Stock Options, (ii) the
number and kind of shares or other securities subject to any then outstanding
Awards under the Plan, (iii) the repurchase price, if any, per share subject to
each outstanding Restricted Stock Award, and (iv) the exercise price for each
share subject to any then outstanding Stock Options and Stock Appreciation
Rights under the Plan, without changing the aggregate exercise price (i.e., the
exercise price multiplied by the number of Stock Options and Stock Appreciation
Rights) as to which such Stock Options and Stock Appreciation Rights remain
exercisable. The Administrator shall also make equitable or proportionate
adjustments in the number of shares subject to outstanding Awards and the
exercise price and the terms of outstanding Awards to take into consideration
cash dividends paid other than in the ordinary course or any other extraordinary
corporate event. The adjustment by the Administrator shall be final, binding and
conclusive. No fractional shares of Stock shall be issued under the Plan
resulting from any such adjustment, but the Administrator in its discretion may
make a cash payment in lieu of fractional shares.
(d)    Mergers and Other Transactions. In the case of and subject to the
consummation of a Change of Control, the parties thereto may cause the
assumption or continuation of Awards theretofore granted by the successor
entity, or the substitution of such Awards with new Awards of the successor
entity or parent thereof, with appropriate adjustment as to the number and kind
of shares and, if appropriate, the per share exercise prices, as such parties
shall agree. To the extent the parties to such Change of Control do not provide
for the assumption, continuation or substitution of Awards, upon the effective
time of the Change of Control, the Plan and all outstanding Awards granted
hereunder shall terminate. In such case, except as may be otherwise provided in
the relevant Award Certificate, all Options and Stock Appreciation Rights that
are not exercisable immediately prior to the effective time of the Change of
Control shall become fully exercisable as of the effective time of the Change of
Control, all other Awards with time-based vesting, conditions or restrictions
shall become fully vested and nonforfeitable as of the effective time of the
Change of Control, and all Awards with conditions and restrictions relating to
the attainment of performance goals may become vested and nonforfeitable in
connection with a Change of Control in the Administrator’s discretion or to the
extent specified in the relevant Award Certificate. In the event of such
termination, (i) the Company shall have the option (in its

7

--------------------------------------------------------------------------------

sole discretion) to make or provide for a payment, in cash or in kind, to the
grantees holding Options and Stock Appreciation Rights, in exchange for the
cancellation thereof, in an amount equal to the difference between (A) the Sale
Price multiplied by the number of shares of Stock subject to outstanding Options
and Stock Appreciation Rights (to the extent then exercisable at prices not in
excess of the Sale Price) and (B) the aggregate exercise price of all such
outstanding Options and Stock Appreciation Rights; or (ii) each grantee shall be
permitted, within a specified period of time prior to the consummation of the
Change of Control as determined by the Administrator, to exercise all
outstanding Options and Stock Appreciation Rights (to the extent then
exercisable) held by such grantee. The Company shall also have the option (in
its sole discretion) to make or provide for a payment, in cash or in kind, to
the grantees holding other Awards in an amount equal to the Sale Price
multiplied by the number of vested shares of Stock under such Awards.
SECTION 4. ELIGIBILITY
Grantees under the Plan will be such full or part-time officers and other
employees, Non-Employee Directors and Consultants of the Company and its
Subsidiaries as are selected from time to time by the Administrator in its sole
discretion.
SECTION 5. STOCK OPTIONS
(a)    Award of Stock Options. The Administrator may grant Stock Options under
the Plan. Any Stock Option granted under the Plan shall be in such form as the
Administrator may from time to time approve.
Stock Options granted under the Plan may be either Incentive Stock Options or
Non-Qualified Stock Options. Incentive Stock Options may be granted only to
employees of the Company or any Subsidiary that is a “subsidiary corporation”
within the meaning of Section 424(f) of the Code. To the extent that any Option
does not qualify as an Incentive Stock Option, it shall be deemed a
Non-Qualified Stock Option.
Stock Options granted pursuant to this Section 5 shall be subject to the
following terms and conditions and shall contain such additional terms and
conditions, not inconsistent with the terms of the Plan, as the Administrator
shall deem desirable. If the Administrator so determines, Stock Options may be
granted in lieu of cash compensation at the optionee’s election, subject to such
terms and conditions as the Administrator may establish.
(b)    Exercise Price. The exercise price per share for the Stock covered by a
Stock Option granted pursuant to this Section 5 shall be determined by the
Administrator at the time of grant but shall not be less than 100 percent of the
Market Value on the date of grant. In the case of an Incentive Stock Option that
is granted to a Ten Percent Owner, the option price of such Incentive Stock
Option shall be not less than 110 percent of the Market Value on the grant date.
(c)    Option Term. The term of each Stock Option shall be fixed by the
Administrator, but no Stock Option shall be exercisable more than ten years
after the date the Stock Option is

8

--------------------------------------------------------------------------------

granted. In the case of an Incentive Stock Option that is granted to a Ten
Percent Owner, the term of such Stock Option shall be no more than five years
from the date of grant.
(d)    Exercisability; Rights of a Stockholder. Stock Options shall become
exercisable at such time or times, whether or not in installments, as shall be
determined by the Administrator at or after the grant date. The Administrator
may at any time accelerate the exercisability of all or any portion of any Stock
Option. An optionee shall have the rights of a stockholder only as to shares
acquired upon the exercise of a Stock Option and not as to unexercised Stock
Options.
(e)    Method of Exercise. Stock Options may be exercised in whole or in part,
by giving written or electronic notice of exercise to the Company, specifying
the number of shares to be purchased. Payment of the purchase price may be made
by one or more of the following methods except to the extent otherwise provided
in the Option Award Certificate:
(i)    In cash, by certified or bank check or other instrument acceptable to the
Administrator;
(ii)    Through the delivery (or attestation to the ownership following such
procedures as the Company may prescribe) of shares of Stock that are not then
subject to restrictions under any Company plan. Such surrendered shares shall be
valued at Market Value on the exercise date;
(iii)    By the optionee delivering to the Company a properly executed exercise
notice together with irrevocable instructions to a broker to promptly deliver to
the Company cash or a check payable and acceptable to the Company for the
purchase price; provided that in the event the optionee chooses to pay the
purchase price as so provided, the optionee and the broker shall comply with
such procedures and enter into such agreements of indemnity and other agreements
as the Company shall prescribe as a condition of such payment procedure; or
(iv)    With respect to Stock Options that are not Incentive Stock Options, by a
“net exercise” arrangement pursuant to which the Company will reduce the number
of shares of Stock issuable upon exercise by the largest whole number of shares
with a Market Value that does not exceed the aggregate exercise price.
Payment instruments will be received subject to collection. The transfer to the
optionee on the records of the Company or of the transfer agent of the shares of
Stock to be purchased pursuant to the exercise of a Stock Option will be
contingent upon receipt from the optionee (or a purchaser acting in his stead in
accordance with the provisions of the Stock Option) by the Company of the full
purchase price for such shares and the fulfillment of any other requirements
contained in the Option Award Certificate or applicable provisions of laws
(including the satisfaction of any withholding taxes that the Company is
obligated to withhold with respect to the optionee). In the event an optionee
chooses to pay the purchase price by previously-owned shares of Stock through
the attestation method, the number of shares of Stock transferred to the
optionee upon the exercise of the Stock Option shall be net of the number of
attested shares. In the event that the Company establishes, for itself or using
the services of a third party, an automated system for the exercise of Stock
Options, such as a system using an internet website

9

--------------------------------------------------------------------------------

or interactive voice response, then the paperless exercise of Stock Options may
be permitted through the use of such an automated system.
(f)    Annual Limit on Incentive Stock Options. To the extent required for
“incentive stock option” treatment under Section 422 of the Code, the aggregate
Market Value (determined as of the time of grant) of the shares of Stock with
respect to which Incentive Stock Options granted under this Plan and any other
plan of the Company or its parent and subsidiary corporations become exercisable
for the first time by an optionee during any calendar year shall not exceed
$100,000. To the extent that any Stock Option exceeds this limit, it shall
constitute a Non-Qualified Stock Option.
SECTION 6. STOCK APPRECIATION RIGHTS
(a)    Award of Stock Appreciation Rights. The Administrator may grant Stock
Appreciation Rights under the Plan. A Stock Appreciation Right is an Award
entitling the recipient to receive shares of Stock (or cash, to the extent
explicitly provided for in the applicable Award Certificate) having a value
equal to the excess of the Market Value of a share of Stock on the date of
exercise over the exercise price of the Stock Appreciation Right multiplied by
the number of shares of Stock with respect to which the Stock Appreciation Right
shall have been exercised.
(b)    Exercise Price of Stock Appreciation Rights. The exercise price of a
Stock Appreciation Right shall not be less than 100 percent of the Market Value
of the Stock on the date of grant.
(c)    Grant and Exercise of Stock Appreciation Rights. Stock Appreciation
Rights may be granted by the Administrator independently of any Stock Option
granted pursuant to Section 5 of the Plan.
(d)    Terms and Conditions of Stock Appreciation Rights. Stock Appreciation
Rights shall be subject to such terms and conditions as shall be determined on
the date of grant by the Administrator. The term of a Stock Appreciation Right
may not exceed ten years. The terms and conditions of each such Award shall be
determined by the Administrator, and such terms and conditions may differ among
individual Awards and grantees.
SECTION 7. RESTRICTED STOCK AWARDS
(a)    Nature of Restricted Stock Awards. The Administrator may grant Restricted
Stock Awards under the Plan. A Restricted Stock Award is any Award of Restricted
Shares subject to such restrictions and conditions as the Administrator may
determine at the time of grant. Conditions may be based on a continuing Service
Relationship and/or achievement of pre-established performance goals and
objectives.
(b)    Rights as a Stockholder. Upon the grant of the Restricted Stock Award and
payment of any applicable purchase price, a grantee shall have the rights of a
stockholder with respect to the voting of the Restricted Shares and receipt of
dividends; provided that if the lapse

10

--------------------------------------------------------------------------------

of restrictions with respect to the Restricted Stock Award is tied to the
attainment of performance goals or to a continuing Service Relationship or to
other restrictions, any dividends paid by the Company during the performance
period shall accrue and shall not be paid to the grantee until and to the extent
the performance goals, the Service Relationship requirements, or other
restrictions are met with respect to the Restricted Stock Award. Unless the
Administrator shall otherwise determine, (i) uncertificated Restricted Shares
shall be accompanied by a notation on the records of the Company or the transfer
agent to the effect that they are subject to forfeiture until such Restricted
Shares are vested as provided in Section 7(d) below, and (ii) certificated
Restricted Shares shall remain in the possession of the Company until such
Restricted Shares are vested as provided in Section 7(d) below, and the grantee
shall be required, as a condition of the grant, to deliver to the Company such
instruments of transfer as the Administrator may prescribe.
(c)    Restrictions. Restricted Shares may not be sold, assigned, transferred,
pledged or otherwise encumbered or disposed of except as specifically provided
herein or in the Restricted Stock Award Certificate. Except as may otherwise be
provided by the Administrator either in the Award Certificate or, subject to
Section 15 below, in writing after the Award is issued, if a grantee’s Service
Relationship with the Company and its Subsidiaries terminates for any reason,
any Restricted Shares that have not vested at the time of termination shall
automatically and without any requirement of notice to such grantee from or
other action by or on behalf of, the Company be deemed to have been reacquired
by the Company at its original purchase price (if any) from such grantee or such
grantee’s legal representative simultaneously with such termination of the
Service Relationship, and thereafter shall cease to represent any ownership of
the Company by the grantee or rights of the grantee as a stockholder. Following
such deemed reacquisition of Restricted Shares that are represented by physical
certificates, a grantee shall surrender such certificates to the Company upon
request without consideration.
(d)    Vesting of Restricted Shares. The Administrator at the time of grant
shall specify the date or dates and/or the attainment of pre-established
performance goals, objectives and other conditions on which the
non-transferability of the Restricted Shares and the Company’s right of
repurchase or forfeiture shall lapse. Subsequent to such date or dates and/or
the attainment of such pre-established performance goals, objectives and other
conditions, the shares on which all restrictions have lapsed shall no longer be
Restricted Shares and shall be deemed “vested.”
SECTION 8. RESTRICTED STOCK UNITS
(a)    Nature of Restricted Stock Units. The Administrator may grant Restricted
Stock Units under the Plan. A Restricted Stock Unit is an Award of stock units
that may be settled in shares of Stock (or cash, to the extent explicitly
provided for in the Award Certificate) upon the satisfaction of such
restrictions and conditions at the time of grant. Conditions may be based on a
continuing Service Relationship and/or achievement of pre-established
performance goals and objectives. The terms and conditions of each such Award
shall be determined by the Administrator, and such terms and conditions may
differ among individual Awards and grantees. Except in the case of Restricted
Stock Units with a deferred settlement date that complies with Section 409A, at
the end of the vesting period, the Restricted Stock Units, to the extent vested,
shall be settled in the form of shares of Stock. Restricted Stock Units with
deferred settlement

11

--------------------------------------------------------------------------------

dates are subject to Section 409A and shall contain such additional terms and
conditions as the Administrator shall determine in its sole discretion in order
to comply with the requirements of Section 409A.
(b)    Rights as a Stockholder. A grantee shall have the rights as a stockholder
only as to shares of Stock acquired by the grantee upon settlement of Restricted
Stock Units; provided, however, that the grantee may be credited with Dividend
Equivalent Rights with respect to the stock units underlying his Restricted
Stock Units, subject to the provisions of Section 10 and such terms and
conditions as the Administrator may determine.
(c)    Termination. Except as may otherwise be provided by the Administrator
either in the Award Certificate or, subject to Section 15 below, in writing
after the Award is issued, a grantee’s right in all Restricted Stock Units that
have not vested shall automatically terminate upon the grantee’s termination of
the Service Relationship with the Company and its Subsidiaries for any reason.
SECTION 9. UNRESTRICTED STOCK AWARDS
Grant or Sale of Unrestricted Stock. Subject to Section 2(g), the Administrator
may grant (or sell at par value or such higher purchase price determined by the
Administrator) an Unrestricted Stock Award under the Plan. An Unrestricted Stock
Award is an Award pursuant to which the grantee may receive shares of Stock free
of any restrictions under the Plan. Unrestricted Stock Awards may be granted in
respect of past services or other valid consideration, or in lieu of cash
compensation due to such grantee.
SECTION 10. DIVIDEND EQUIVALENT RIGHTS
(a)    Dividend Equivalent Rights. The Administrator may grant Dividend
Equivalent Rights under the Plan. A Dividend Equivalent Right is an Award
entitling the grantee to receive credits based on cash dividends that would have
been paid on the shares of Stock specified in the Dividend Equivalent Right (or
other Award to which it relates) if such shares had been issued to the grantee.
A Dividend Equivalent Right may be granted hereunder to any grantee as a
component of an award of Restricted Stock Units or as a freestanding award. The
terms and conditions of Dividend Equivalent Rights shall be specified in the
Award Certificate. Dividend equivalents credited to the holder of a Dividend
Equivalent Right may be paid currently or may be deemed to be reinvested in
additional shares of Stock, which may thereafter accrue additional equivalents.
Any such reinvestment shall be at Market Value on the date of reinvestment or
such other price as may then apply under a dividend reinvestment plan sponsored
by the Company, if any. Dividend Equivalent Rights may be settled in cash or
shares of Stock or a combination thereof, in a single installment or
installments. A Dividend Equivalent Right granted as a component of an Award of
Restricted Stock Units shall provide that such Dividend Equivalent Right shall
be settled only upon settlement or payment of, or lapse of restrictions on, such
other Award, and that such Dividend Equivalent Right shall expire or be
forfeited or annulled under the same conditions as such other Award.

12

--------------------------------------------------------------------------------

(b)    Termination. Except as may otherwise be provided by the Administrator
either in the Award Certificate or, subject to Section 15 below, in writing
after the Award is issued, a grantee’s rights in all Dividend Equivalent Rights
shall automatically terminate upon the grantee’s termination of the Service
Relationship with the Company and its Subsidiaries for any reason.
SECTION 11. TRANSFERABILITY OF AWARDS
(a)    Transferability. Except as provided in Section 11(b) below, during a
grantee’s lifetime, his or her Awards shall be exercisable only by the grantee,
or by the grantee’s legal representative or guardian in the event of the
grantee’s incapacity. No Awards shall be sold, assigned, transferred or
otherwise encumbered or disposed of by a grantee other than by will or by the
laws of descent and distribution or pursuant to a domestic relations order. No
Awards shall be subject, in whole or in part, to attachment, execution, or levy
of any kind, and any purported transfer in violation hereof shall be null and
void.
(b)    Administrator Action. Notwithstanding Section 11(a), the Administrator,
in its discretion, may provide either in the Award Certificate regarding a given
Award or by subsequent written approval that the grantee (who is an employee or
director) may transfer his or her Non-Qualified Stock Options to his or her
immediate family members, to trusts for the benefit of such family members, or
to partnerships in which such family members are the only partners, provided
that the transferee agrees in writing with the Company to be bound by all of the
terms and conditions of this Plan and the applicable Award. In no event may an
Award be transferred by a grantee for value.
(c)    Family Member. For purposes of Section 11(b), “family member” shall mean
a grantee’s child, stepchild, grandchild, parent, stepparent, grandparent,
spouse, former spouse, sibling, niece, nephew, mother-in-law, father-in-law,
son-in-law, daughter-in-law, brother-in-law, or sister-in-law, including
adoptive relationships, any person sharing the grantee’s household (other than a
tenant of the grantee), a trust in which these persons (or the grantee) have
more than 50 percent of the beneficial interest, a foundation in which these
persons (or the grantee) control the management of assets, and any other entity
in which these persons (or the grantee) own more than 50 percent of the voting
interests.
(d)    Designation of Beneficiary. To the extent permitted by the Company, each
grantee to whom an Award has been made under the Plan may designate a
beneficiary or beneficiaries to exercise any Award or receive any payment under
any Award payable on or after the grantee’s death. Any such designation shall be
on a form provided for that purpose by the Administrator and shall not be
effective until received by the Administrator. If no beneficiary has been
designated by a deceased grantee, or if the designated beneficiaries have
predeceased the grantee, the beneficiary shall be the grantee’s estate.
SECTION 12. TAX WITHHOLDING
(a)    Payment by Grantee. Each grantee shall, no later than the date as of
which the value of an Award or of any Stock or other amounts received thereunder
first becomes includable

13

--------------------------------------------------------------------------------

in the gross income of the grantee for Federal income tax purposes, pay to the
Company, or make arrangements satisfactory to the Administrator regarding
payment of, any Federal, state, or local taxes of any kind required by law to be
withheld by the Company with respect to such income. The Company and its
Subsidiaries shall, to the extent permitted by law, have the right to deduct any
such taxes from any payment of any kind otherwise due to the grantee. The
Company’s obligation to deliver evidence of book entry (or stock certificates)
to any grantee is subject to and conditioned on tax withholding obligations
being satisfied by the grantee.
(b)    Payment in Stock. Subject to approval by the Administrator, a grantee may
elect to have the Company’s required tax withholding obligation satisfied, in
whole or in part, by authorizing the Company to withhold from shares of Stock to
be issued pursuant to any Award a number of shares with an aggregate Market
Value (as of the date the withholding is effected) that would satisfy the
withholding amount due; provided, however, that the amount withheld does not
exceed the maximum statutory tax rate or such lesser amount as is necessary to
avoid adverse accounting treatment or as determined by the Administrator. The
Administrator may also require Awards to be subject to mandatory share
withholding up to the required withholding amount. For purposes of share
withholding, the Market Value of withheld shares shall be determined in the same
manner as the value of Stock includible in income of the Participants.
SECTION 13. SECTION 409A AWARDS
To the extent that any Award is determined to constitute “nonqualified deferred
compensation” within the meaning of Section 409A (a “409A Award”), the Award
shall be subject to such additional rules and requirements as specified by the
Administrator from time to time in order to comply with Section 409A. In this
regard, if any amount under a 409A Award is payable upon a “separation from
service” (within the meaning of Section 409A) to a grantee who is then
considered a “specified employee” (within the meaning of Section 409A), then no
such payment shall be made prior to the date that is the earlier of (i) six
months and one day after the grantee’s separation from service, or (ii) the
grantee’s death, but only to the extent such delay is necessary to prevent such
payment from being subject to interest, penalties and/or additional tax imposed
pursuant to Section 409A. Further, the settlement of any such Award may not be
accelerated except to the extent permitted by Section 409A.
SECTION 14. TERMINATION OF SERVICE RELATIONSHIP, TRANSFER, LEAVE OF ABSENCE,
ETC.
(a)    Termination of Service Relationship. If the grantee’s Service
Relationship is with a Subsidiary and such Subsidiary ceases to be a Subsidiary,
the grantee shall be deemed to have terminated his or her Service Relationship
for purposes of the Plan.
(b)    For purposes of the Plan, the following events shall not be deemed a
termination of a Service Relationship:
(i)    a transfer of the Service Relationship from a Subsidiary to the Company
or from the Company to a Subsidiary, or from one Subsidiary to another; or

14

--------------------------------------------------------------------------------

(ii)    an approved leave of absence for military service or sickness, or for
any other purpose approved by the Company, if the employee’s right to
re-employment is guaranteed either by a statute or by contract or under the
policy pursuant to which the leave of absence was granted or if the
Administrator otherwise so provides in writing.
SECTION 15. AMENDMENTS AND TERMINATION
The Board may, at any time, amend or discontinue the Plan and the Administrator
may, at any time, amend or cancel any outstanding Award for the purpose of
satisfying changes in law or for any other lawful purpose, but no such action
shall adversely affect rights under any outstanding Award without the holder’s
consent. Except as provided in Section 3(c) or 3(d), without prior stockholder
approval, in no event may the Administrator exercise its discretion to reduce
the exercise price of outstanding Stock Options or Stock Appreciation Rights or
effect the repricing of such Awards through cancellation and re-grants. To the
extent required by applicable laws, including under the rules of any securities
exchange or market system on which the Stock is listed, and/or to the extent
determined by the Administrator to be required by the Code to ensure that
Incentive Stock Options granted under the Plan are qualified under Section 422
of the Code, Plan amendments shall be subject to approval by the Company
stockholders entitled to vote at a meeting of stockholders. Nothing in this
Section 15 shall limit the Administrator’s authority to take any action
permitted pursuant to Section 3(c) or 3(d).
SECTION 16. STATUS OF PLAN
With respect to the portion of any Award that has not been exercised and any
payments in cash, Stock or other consideration not received by a grantee, a
grantee shall have no rights greater than those of a general creditor of the
Company unless the Administrator shall otherwise expressly determine in
connection with any Award or Awards. In its sole discretion, the Administrator
may authorize the creation of trusts or other arrangements to meet the Company’s
obligations to deliver Stock or make payments with respect to Awards hereunder,
provided that the existence of such trusts or other arrangements is consistent
with the foregoing sentence.
SECTION 17. GENERAL PROVISIONS
(a)    No Distribution. The Administrator may require each person acquiring
Stock pursuant to an Award to represent to and agree with the Company in writing
that such person is acquiring the shares without a view to distribution thereof.
(b)    Delivery of Stock Certificates. Stock certificates to grantees under this
Plan shall be deemed delivered for all purposes when the Company or a stock
transfer agent of the Company shall have mailed such certificates in the United
States mail, addressed to the grantee, at the grantee’s last known address on
file with the Company. Uncertificated Stock shall be deemed delivered for all
purposes when the Company or a Stock transfer agent of the Company shall have
given to the grantee by electronic mail (with proof of receipt) or by United
States mail, addressed to the grantee, at the grantee’s last known address on
file with the Company, notice of issuance and recorded the issuance in its
records (which may include electronic “book entry” records). Notwithstanding
anything herein to the contrary, the Company shall not be

15

--------------------------------------------------------------------------------

required to issue or deliver any certificates evidencing shares of Stock
pursuant to the exercise of any Award, unless and until the Administrator has
determined, with advice of counsel (to the extent the Administrator deems such
advice necessary or advisable), that the issuance and delivery of such
certificates is in compliance with all applicable laws, regulations of
governmental authorities and, if applicable, the requirements of any exchange on
which the shares of Stock are listed, quoted or traded. All Stock certificates
delivered pursuant to the Plan shall be subject to any stop-transfer orders and
other restrictions as the Administrator deems necessary or advisable to comply
with federal, state or foreign jurisdiction, securities or other laws, rules and
quotation system on which the Stock is listed, quoted or traded. The
Administrator may place legends on any Stock certificate to reference
restrictions applicable to the Stock. In addition to the terms and conditions
provided herein, the Administrator may require that an individual make such
reasonable covenants, agreements, and representations as the Administrator, in
its discretion, deems necessary or advisable in order to comply with any such
laws, regulations, or requirements. The Administrator shall have the right to
require any individual to comply with any timing or other restrictions with
respect to the settlement or exercise of any Award, including a window-period
limitation, as may be imposed in the discretion of the Administrator.
(c)    Stockholder Rights. Until Stock is deemed delivered in accordance with
Section 17(b), no right to vote or receive dividends or any other rights of a
stockholder will exist with respect to shares of Stock to be issued in
connection with an Award, notwithstanding the exercise of a Stock Option or any
other action by the grantee with respect to an Award.
(d)    Other Compensation Arrangements; No Employment Rights. Nothing contained
in this Plan shall prevent the Board from adopting other or additional
compensation arrangements, including trusts, and such arrangements may be either
generally applicable or applicable only in specific cases. The adoption of this
Plan and the grant of Awards do not confer upon any employee any right to
continued employment or other Service Relationship with the Company or any
Subsidiary.
(e)    Trading Policy Restrictions. Option exercises and other Awards under the
Plan shall be subject to the Company’s insider trading policies and procedures,
as in effect from time to time.
(f)    Clawback Policy. Awards under the Plan shall be subject to the Company’s
clawback policy, as in effect from time to time.
SECTION 18. EFFECTIVE DATE OF PLAN
This Plan shall become effective upon stockholder approval of the Plan in
accordance with applicable state law, the Company’s bylaws and certificate of
incorporation, and applicable stock exchange rules. No grants of Stock Options
and other Awards may be made hereunder after the tenth anniversary of the
Effective Date and no grants of Incentive Stock Options may be made hereunder
after the tenth anniversary of the date the Plan is approved by the Board.
SECTION 19. GOVERNING LAW

16

--------------------------------------------------------------------------------

This Plan and all Awards and actions taken thereunder shall be governed by, and
construed in accordance with, the laws of the State of Delaware, applied without
regard to conflict of law principles.
DATE APPROVED BY BOARD OF DIRECTORS: APRIL 12, 2018
DATE APPROVED BY STOCKHOLDERS: JUNE 6, 2018

17

--------------------------------------------------------------------------------

INCENTIVE STOCK OPTION AGREEMENT
UNDER THE RADIUS HEALTH, INC.
2018 STOCK OPTION AND INCENTIVE PLAN
Name of Optionee:
No. of Option Shares:
Option Exercise Price per Share:
Grant Date:
Vesting Commencement Date:

Expiration Date:
Pursuant to the Radius Health, Inc. 2018 Stock Option and Incentive Plan, as
amended through the date hereof (the “Plan”), Radius Health, Inc. (the
“Company”) hereby grants to the Optionee named above an option (the “Stock
Option”) to purchase on or prior to the Expiration Date specified above all or
part of the number of shares of Common Stock, par value $0.0001 per share (the
“Stock”), of the Company specified above at the Option Exercise Price per Share
specified above subject to the terms and conditions set forth herein and in the
Plan.
1.Exercisability Schedule. No portion of this Stock Option may be exercised
until such portion shall have become exercisable. Except as set forth below, and
subject to the discretion of the Administrator (as defined in Section 2 of the
Plan) to accelerate the exercisability schedule hereunder, this Stock Option
shall vest and become exercisable as to 25% of the number of Option Shares on
the first anniversary of the Vesting Commencement Date and as to 1/48th of the
number of Option Shares on the same day of each of the 36 consecutive months
thereafter, provided that each Option Share which would be fractionally vested
shall be cumulated and shall vest on the first vesting date upon which the whole
Option Share has cumulated, and provided further that the Optionee remains an
employee of the Company or a Subsidiary on such dates.
In the event that the Optionee’s employment with the Company or a Subsidiary
terminates, but the Optionee otherwise maintains a Service Relationship with the
Company or a Subsidiary or any successor entity, then this Stock Option shall
continue to vest in accordance with the Exercisability Schedule set forth above;
provided, however, that this Stock Option shall cease to qualify as an
“incentive stock option” under Section 422 of the Internal Revenue Code of 1986,
as amended (the “Code”), and shall be deemed to be a non-qualified stock option.

--------------------------------------------------------------------------------

Once exercisable, this Stock Option shall continue to be exercisable at any time
or times prior to the close of business on the Expiration Date, subject to the
provisions hereof and of the Plan.
2.    Manner of Exercise.
(a)    The Optionee may, from time to time on or prior to the Expiration Date of
this Stock Option, exercise this Stock Option only by completing the transaction
through the Company’s administrative agent’s website or by calling its toll free
number, specifying the number of Option Shares being purchased as a result of
such exercise, together with payment of the full purchase price for the Option
Shares being purchased.
The transfer to the Optionee on the records of the Company or of the transfer
agent of the Option Shares will be contingent upon (i) the Company’s receipt
from the Optionee of the full purchase price for the Option Shares, as set forth
above, (ii) the fulfillment of any other requirements contained herein or in the
Plan or in any other agreement or provision of laws, and (iii) the receipt by
the Company of any agreement, statement or other evidence that the Company may
require to satisfy itself that the issuance of Stock to be purchased pursuant to
the exercise of Stock Options under the Plan and any subsequent resale of the
shares of Stock will be in compliance with applicable laws and regulations.
(b)    The shares of Stock purchased upon exercise of this Stock Option shall be
transferred to the Optionee on the records of the Company or of the transfer
agent upon compliance to the satisfaction of the Administrator with all
requirements under applicable laws or regulations in connection with such
transfer and with the requirements hereof and of the Plan. The determination of
the Administrator as to such compliance shall be final and binding on the
Optionee. The Optionee shall not be deemed to be the holder of, or to have any
of the rights of a holder with respect to, any shares of Stock subject to this
Stock Option unless and until this Stock Option shall have been exercised
pursuant to the terms hereof, the Company or the transfer agent shall have
transferred the shares to the Optionee, and the Optionee’s name shall have been
entered as the stockholder of record on the books of the Company. Thereupon, the
Optionee shall have full voting, dividend and other ownership rights with
respect to such shares of Stock.
(c)    In no event may a fraction of a share be exercised or acquired.
(d)    Notwithstanding any other provision hereof or of the Plan, no portion of
this Stock Option shall be exercisable after the Expiration Date hereof.
3.    Termination of Employment. If the Optionee’s employment by the Company or
a Subsidiary (as defined in the Plan) is terminated, the period within which to
exercise the Stock Option may be subject to earlier termination as set forth
below.
(a)    Termination Due to Death. If the Optionee’s employment terminates by
reason of the Optionee’s death, any portion of this Stock Option outstanding on
such date, to the

2

--------------------------------------------------------------------------------

extent exercisable on the date of death, may thereafter be exercised by the
Optionee’s legal representative or legatee for a period of 12 months from the
date of death or until the Expiration Date, if earlier. Any portion of this
Stock Option that is not exercisable on the date of death shall terminate
immediately and be of no further force or effect.
(b)    Termination Due to Disability. If the Optionee’s employment terminates by
reason of the Optionee’s disability (as determined by the Administrator), any
portion of this Stock Option outstanding on such date, to the extent exercisable
on the date of such termination of employment, may thereafter be exercised by
the Optionee for a period of 12 months from the date of disability or until the
Expiration Date, if earlier. Any portion of this Stock Option that is not
exercisable on the date of disability shall terminate immediately and be of no
further force or effect.
(c)    Termination for Cause. If the Optionee’s employment terminates for Cause,
any portion of this Stock Option outstanding on such date shall terminate
immediately and be of no further force and effect. For purposes hereof, “Cause”
shall mean, unless otherwise provided in an employment agreement between the
Company and the Optionee, a determination by the Administrator that the Optionee
shall be dismissed as a result of (i) any material breach by the Optionee of any
agreement between the Optionee and the Company; (ii) the conviction of,
indictment for or plea of nolo contendere by the Optionee to a felony or a crime
involving moral turpitude; or (iii) any material misconduct or willful and
deliberate non-performance (other than by reason of disability) by the Optionee
of the Optionee’s duties to the Company.
(d)    Other Termination. If the Optionee’s employment terminates for any reason
other than the Optionee’s death, the Optionee’s disability, or Cause, and unless
otherwise determined by the Administrator, any portion of this Stock Option
outstanding on such date may be exercised, to the extent exercisable on the date
of termination, for a period of three months from the date of termination or
until the Expiration Date, if earlier. Any portion of this Stock Option that is
not exercisable on the date of termination shall terminate immediately and be of
no further force or effect.
The Administrator’s determination of the reason for termination of the
Optionee’s employment shall be conclusive and binding on the Optionee and his or
her representatives or legatees.
4.    Incorporation of Plan. Notwithstanding anything herein to the contrary,
this Stock Option shall be subject to and governed by all the terms and
conditions of the Plan, including the powers of the Administrator set forth in
Section 2(b) of the Plan. Capitalized terms in this Agreement shall have the
meaning specified in the Plan, unless a different meaning is specified herein.
5.    Transferability. This Agreement is personal to the Optionee, is
non-assignable and is not transferable in any manner, by operation of law or
otherwise, other than by will or the

3

--------------------------------------------------------------------------------

laws of descent and distribution. This Stock Option is exercisable, during the
Optionee’s lifetime, only by the Optionee, and thereafter, only by the
Optionee’s legal representative or legatee.
6.    Status of the Stock Option. This Stock Option is intended to qualify as an
“incentive stock option” under Section 422 of the Code, but the Company does not
represent or warrant that this Stock Option qualifies as such. The Optionee
should consult with his or her own tax advisors regarding the tax effects of
this Stock Option and the requirements necessary to obtain favorable income tax
treatment under Section 422 of the Code, including, but not limited to, holding
period requirements. To the extent any portion of this Stock Option does not so
qualify as an “incentive stock option,” such portion shall be deemed to be a
non-qualified stock option. If the Optionee intends to dispose or does dispose
(whether by sale, gift, transfer or otherwise) of any Option Shares within the
one-year period beginning on the date after the transfer of such shares to him
or her, or within the two-year period beginning on the day after the grant of
this Stock Option, he or she will so notify the Company within 30 days after
such disposition.
7.    Tax Withholding. The Optionee shall, not later than the date as of which
the exercise of this Stock Option becomes a taxable event for Federal income tax
purposes, pay to the Company or make arrangements satisfactory to the
Administrator for payment of any Federal, state, and local taxes required by law
to be withheld on account of such taxable event. The Company shall have the
authority to cause the required tax withholding obligation to be satisfied, in
whole or in part, by withholding from shares of Stock to be issued to the
Optionee a number of shares of Stock with an aggregate Market Value that would
satisfy the minimum withholding amount due.
8.    No Obligation to Continue Employment. Neither the Company nor any
Subsidiary is obligated by or as a result of the Plan or this Agreement to
continue the Optionee in employment and neither the Plan nor this Agreement
shall interfere in any way with the right of the Company or any Subsidiary to
terminate the employment of the Optionee at any time.
9.    Integration. This Agreement constitutes the entire agreement between the
parties with respect to this Stock Option and supersedes all prior agreements
and discussions between the parties concerning such subject matter.
10.    Data Privacy Consent. In order to administer the Plan and this Agreement
and to implement or structure future equity grants, the Company, its
subsidiaries and affiliates and certain agents thereof (together, the “Relevant
Companies”) may process any and all personal or professional data, including but
not limited to Social Security or other identification number, home address and
telephone number, date of birth and other information that is necessary or
desirable for the administration of the Plan and/or this Agreement (the
“Relevant Information”). By entering into this Agreement, the Optionee (i)
authorizes the Company to collect, process, register and transfer to the
Relevant Companies all Relevant Information; (ii) waives any privacy

4

--------------------------------------------------------------------------------

rights the Optionee may have with respect to the Relevant Information; (iii)
authorizes the Relevant Companies to store and transmit such information in
electronic form; and (iv) authorizes the transfer of the Relevant Information to
any jurisdiction in which the Relevant Companies consider appropriate. The
Optionee shall have access to, and the right to change, the Relevant
Information. Relevant Information will only be used in accordance with
applicable law.
11.    Notices. Notices hereunder shall be mailed or delivered to the Company at
its principal place of business and shall be mailed or delivered to the Optionee
at the address on file with the Company or, in either case, at such other
address as one party may subsequently furnish to the other party in writing.
12.    Acceptance of Option. The Optionee must execute this Agreement by logging
on to the Company’s administrative agent’s website for the Plan. IF THE OPTIONEE
DOES NOT ELECTRONICALLY ACCEPT THIS STOCK OPTION THROUGH THE WEBSITE WITHIN
THIRTY (30) DAYS FOLLOWING THE GRANT DATE AND THEREBY ACCEPT THE TERMS AND
CONDITIONS OF THIS AGREEMENT AND THE PLAN, THEN THE OPTIONEE WILL BE DEEMED TO
HAVE DECLINED THE STOCK OPTION AND THE STOCK OPTION WILL BE NULL AND VOID (AND
THE OPTIONEE WILL HAVE NO RIGHTS WITH RESPECT TO THE STOCK OPTION).

5

--------------------------------------------------------------------------------

NON-QUALIFIED STOCK OPTION AGREEMENT
FOR COMPANY EMPLOYEES
UNDER THE RADIUS HEALTH, INC.
2018 STOCK OPTION AND INCENTIVE PLAN
Name of Optionee:
No. of Option Shares:
Option Exercise Price per Share:
Grant Date:
Vesting Commencement Date:

Expiration Date:
Pursuant to the Radius Health, Inc. 2018 Stock Option and Incentive Plan, as
amended through the date hereof (the “Plan”), Radius Health, Inc. (the
“Company”) hereby grants to the Optionee named above an option (the “Stock
Option”) to purchase on or prior to the Expiration Date specified above all or
part of the number of shares of Common Stock, par value 0.0001 per share (the
“Stock”) of the Company specified above at the Option Exercise Price per Share
specified above subject to the terms and conditions set forth herein and in the
Plan. This Stock Option is not intended to be an “incentive stock option” under
Section 422 of the Internal Revenue Code of 1986, as amended.
1.    Exercisability Schedule. No portion of this Stock Option may be exercised
until such portion shall have become exercisable. Except as set forth below, and
subject to the discretion of the Administrator (as defined in Section 2 of the
Plan) to accelerate the exercisability schedule hereunder, this Stock Option
shall vest and become exercisable as to 25% of the number of Option Shares on
the first anniversary of the Vesting Commencement Date and as to 1/48th of the
number of Option Shares on the same day of each of the 36 consecutive months
thereafter, provided that each Option Share which would be fractionally vested
shall be cumulated and shall vest on the first vesting date upon which the whole
Option Share has cumulated, and provided further that the Optionee has a
continuing Service Relationship with the Company or a Subsidiary or any
successor entity on such dates.
Once exercisable, this Stock Option shall continue to be exercisable at any time
or times prior to the close of business on the Expiration Date, subject to the
provisions hereof and of the Plan.

--------------------------------------------------------------------------------

2.    Manner of Exercise.
(a)    The Optionee may, from time to time on or prior to the Expiration Date of
this Stock Option, exercise this Stock Option only by completing the transaction
through the Company’s administrative agent’s website or by calling its toll free
number, specifying the number of Option Shares being purchased as a result of
such exercise, together with payment of the full purchase price for the Option
Shares being purchased.
The transfer to the Optionee on the records of the Company or of the transfer
agent of the Option Shares will be contingent upon (i) the Company’s receipt
from the Optionee of the full purchase price for the Option Shares, as set forth
above, (ii) the fulfillment of any other requirements contained herein or in the
Plan or in any other agreement or provision of laws, and (iii) the receipt by
the Company of any agreement, statement or other evidence that the Company may
require to satisfy itself that the issuance of Stock to be purchased pursuant to
the exercise of Stock Options under the Plan and any subsequent resale of the
shares of Stock will be in compliance with applicable laws and regulations.
(b)    The shares of Stock purchased upon exercise of this Stock Option shall be
transferred to the Optionee on the records of the Company or of the transfer
agent upon compliance to the satisfaction of the Administrator with all
requirements under applicable laws or regulations in connection with such
transfer and with the requirements hereof and of the Plan. The determination of
the Administrator as to such compliance shall be final and binding on the
Optionee. The Optionee shall not be deemed to be the holder of, or to have any
of the rights of a holder with respect to, any shares of Stock subject to this
Stock Option unless and until this Stock Option shall have been exercised
pursuant to the terms hereof, the Company or the transfer agent shall have
transferred the shares to the Optionee, and the Optionee’s name shall have been
entered as the stockholder of record on the books of the Company. Thereupon, the
Optionee shall have full voting, dividend and other ownership rights with
respect to such shares of Stock.
(c)    In no event may a fraction of a share be exercised or acquired.
(d)    Notwithstanding any other provision hereof or of the Plan, no portion of
this Stock Option shall be exercisable after the Expiration Date hereof.
3.    Termination of Service Relationship. If the Optionee’s Service
Relationship with the Company or a Subsidiary or any successor entity is
terminated, the period within which to exercise the Stock Option may be subject
to earlier termination as set forth below.
(a)    Termination Due to Death. If the Optionee’s Service Relationship
terminates by reason of the Optionee’s death, any portion of this Stock Option
outstanding on such date, to the extent exercisable on the date of death, may
thereafter be exercised by the Optionee’s legal representative or legatee for a
period of 12 months from the date of death or

2

--------------------------------------------------------------------------------

until the Expiration Date, if earlier. Any portion of this Stock Option that is
not exercisable on the date of death shall terminate immediately and be of no
further force or effect.
(b)    Termination Due to Disability. If the Optionee’s Service Relationship
terminates by reason of the Optionee’s disability (as determined by the
Administrator), any portion of this Stock Option outstanding on such date, to
the extent exercisable on the date of such termination of the Service
Relationship, may thereafter be exercised by the Optionee for a period of 12
months from the date of disability or until the Expiration Date, if earlier. Any
portion of this Stock Option that is not exercisable on the date of disability
shall terminate immediately and be of no further force or effect.
(c)    Termination for Cause. If the Optionee’s Service Relationship terminates
for Cause, any portion of this Stock Option outstanding on such date shall
terminate immediately and be of no further force and effect. For purposes
hereof, “Cause” shall mean, unless otherwise provided in an employment or other
service agreement between the Company and the Optionee, a determination by the
Administrator that the Optionee shall be dismissed as a result of (i) any
material breach by the Optionee of any agreement between the Optionee and the
Company; (ii) the conviction of, indictment for or plea of nolo contendere by
the Optionee to a felony or a crime involving moral turpitude; or (iii) any
material misconduct or willful and deliberate non-performance (other than by
reason of disability) by the Optionee of the Optionee’s duties to the Company.
(d)    Other Termination. If the Optionee’s Service Relationship terminates for
any reason other than the Optionee’s death, the Optionee’s disability or Cause,
and unless otherwise determined by the Administrator, any portion of this Stock
Option outstanding on such date may be exercised, to the extent exercisable on
the date of termination, for a period of three months from the date of
termination or until the Expiration Date, if earlier. Any portion of this Stock
Option that is not exercisable on the date of termination shall terminate
immediately and be of no further force or effect.
The Administrator’s determination of the reason for termination of the
Optionee’s Service Relationship shall be conclusive and binding on the Optionee
and his or her representatives or legatees.
4.    Incorporation of Plan. Notwithstanding anything herein to the contrary,
this Stock Option shall be subject to and governed by all the terms and
conditions of the Plan, including the powers of the Administrator set forth in
Section 2(b) of the Plan. Capitalized terms in this Agreement shall have the
meaning specified in the Plan, unless a different meaning is specified herein.
5.    Transferability. This Agreement is personal to the Optionee, is
non-assignable and is not transferable in any manner, by operation of law or
otherwise, other than by will or the laws of descent and distribution. This
Stock Option is exercisable, during the Optionee’s

3

--------------------------------------------------------------------------------

lifetime, only by the Optionee, and thereafter, only by the Optionee’s legal
representative or legatee.
6.    Tax Withholding. The Optionee shall, not later than the date as of which
the exercise of this Stock Option becomes a taxable event for Federal income tax
purposes, pay to the Company or make arrangements satisfactory to the
Administrator for payment of any Federal, state, and local taxes required by law
to be withheld on account of such taxable event. The Company shall have the
authority to cause the required tax withholding obligation to be satisfied, in
whole or in part, by withholding from shares of Stock to be issued to the
Optionee a number of shares of Stock with an aggregate Market Value that would
satisfy the minimum withholding amount due.
7.    No Obligation to Continue Service Relationship. Neither the Company nor
any Subsidiary is obligated by or as a result of the Plan or this Agreement to
continue the Optionee’s Service Relationship with the Company or a Subsidiary or
any successor entity, and neither the Plan nor this Agreement shall interfere in
any way with the right of the Company or any Subsidiary to terminate the
Optionee’s Service Relationship at any time.
8.    Integration. This Agreement constitutes the entire agreement between the
parties with respect to this Stock Option and supersedes all prior agreements
and discussions between the parties concerning such subject matter.
9.    Data Privacy Consent. In order to administer the Plan and this Agreement
and to implement or structure future equity grants, the Company, its
subsidiaries and affiliates and certain agents thereof (together, the “Relevant
Companies”) may process any and all personal or professional data, including but
not limited to Social Security or other identification number, home address and
telephone number, date of birth and other information that is necessary or
desirable for the administration of the Plan and/or this Agreement (the
“Relevant Information”). By entering into this Agreement, the Optionee (i)
authorizes the Company to collect, process, register and transfer to the
Relevant Companies all Relevant Information; (ii) waives any privacy rights the
Optionee may have with respect to the Relevant Information; (iii) authorizes the
Relevant Companies to store and transmit such information in electronic form;
and (iv) authorizes the transfer of the Relevant Information to any jurisdiction
in which the Relevant Companies consider appropriate. The Optionee shall have
access to, and the right to change, the Relevant Information. Relevant
Information will only be used in accordance with applicable law.

4

--------------------------------------------------------------------------------

10.    Notices. Notices hereunder shall be mailed or delivered to the Company at
its principal place of business and shall be mailed or delivered to the Optionee
at the address on file with the Company or, in either case, at such other
address as one party may subsequently furnish to the other party in writing.
11.    Acceptance of Option. The Optionee must execute this Agreement by logging
on to the Company’s administrative agent’s website for the Plan. IF THE OPTIONEE
DOES NOT ELECTRONICALLY ACCEPT THIS STOCK OPTION THROUGH THE WEBSITE WITHIN
THIRTY (30) DAYS FOLLOWING THE GRANT DATE AND THEREBY ACCEPT THE TERMS AND
CONDITIONS OF THIS AGREEMENT AND THE PLAN, THEN THE OPTIONEE WILL BE DEEMED TO
HAVE DECLINED THE STOCK OPTION AND THE STOCK OPTION WILL BE NULL AND VOID (AND
THE OPTIONEE WILL HAVE NO RIGHTS WITH RESPECT TO THE STOCK OPTION).

5

--------------------------------------------------------------------------------

NON-QUALIFIED STOCK OPTION AGREEMENT
FOR NON-EMPLOYEE DIRECTORS
UNDER THE RADIUS HEALTH, INC.
2018 STOCK OPTION AND INCENTIVE PLAN
Name of Optionee:
No. of Option Shares:
Option Exercise Price per Share:
Grant Date:
Vesting Commencement Date:

Expiration Date:
Pursuant to the Radius Health, Inc. 2018 Stock Option and Incentive Plan, as
amended through the date hereof (the “Plan”), Radius Health, Inc. (the
“Company”) hereby grants to the Optionee named above, who is a Director of the
Company but is not an employee of the Company, an option (the “Stock Option”) to
purchase on or prior to the Expiration Date specified above all or part of the
number of shares of Common Stock, par value $0.0001 per share (the “Stock”), of
the Company specified above at the Option Exercise Price per Share specified
above subject to the terms and conditions set forth herein and in the Plan. This
Stock Option is not intended to be an “incentive stock option” under Section 422
of the Internal Revenue Code of 1986, as amended.
1.    Exercisability Schedule. No portion of this Stock Option may be exercised
until such portion shall have become exercisable. Except as set forth below, and
subject to the discretion of the Administrator (as defined in Section 2 of the
Plan) to accelerate the exercisability schedule hereunder, this Stock Option
vest and become exercisable as to 100% of the number of Option Shares on the
first anniversary of the Vesting Commencement Date, provided that the Optionee
has a continuing Service Relationship with the Company or a Subsidiary or any
successor entity on such date.
Once exercisable, this Stock Option shall continue to be exercisable at any time
or times prior to the close of business on the Expiration Date, subject to the
provisions hereof and of the Plan.

--------------------------------------------------------------------------------

2.    Manner of Exercise.
(a)    The Optionee may, from time to time on or prior to the Expiration Date of
this Stock Option, exercise this Stock Option only by completing the transaction
through the Company’s administrative agent’s website or by calling its toll free
number, specifying the number of Option Shares being purchased as a result of
such exercise, together with payment of the full purchase price for the Option
Shares being purchased.
The transfer to the Optionee on the records of the Company or of the transfer
agent of the Option Shares will be contingent upon (i) the Company’s receipt
from the Optionee of the full purchase price for the Option Shares, as set forth
above, (ii) the fulfillment of any other requirements contained herein or in the
Plan or in any other agreement or provision of laws, and (iii) the receipt by
the Company of any agreement, statement or other evidence that the Company may
require to satisfy itself that the issuance of Stock to be purchased pursuant to
the exercise of Stock Options under the Plan and any subsequent resale of the
shares of Stock will be in compliance with applicable laws and regulations.
(b)    The shares of Stock purchased upon exercise of this Stock Option shall be
transferred to the Optionee on the records of the Company or of the transfer
agent upon compliance to the satisfaction of the Administrator with all
requirements under applicable laws or regulations in connection with such
transfer and with the requirements hereof and of the Plan. The determination of
the Administrator as to such compliance shall be final and binding on the
Optionee. The Optionee shall not be deemed to be the holder of, or to have any
of the rights of a holder with respect to, any shares of Stock subject to this
Stock Option unless and until this Stock Option shall have been exercised
pursuant to the terms hereof, the Company or the transfer agent shall have
transferred the shares to the Optionee, and the Optionee’s name shall have been
entered as the stockholder of record on the books of the Company. Thereupon, the
Optionee shall have full voting, dividend and other ownership rights with
respect to such shares of Stock.
(c)     In no event may a fraction of a share be exercised or acquired.
(d)    Notwithstanding any other provision hereof or of the Plan, no portion of
this Stock Option shall be exercisable after the Expiration Date hereof.
3.    Termination of Service Relationship. If the Optionee’s Service
Relationship with the Company or a Subsidiary or any successor entity
terminates, the period within which to exercise the Stock Option may be subject
to earlier termination as set forth below.
(a)    Termination Due to Death. If the Optionee’s Service Relationship
terminates by reason of the Optionee’s death, any portion of this Stock Option
outstanding on such date, to the extent exercisable on the date of death, may
thereafter be exercised by the Optionee’s legal representative or legatee for a
period of 12 months from the date of death or

2

--------------------------------------------------------------------------------

until the Expiration Date, if earlier. Any portion of this Stock Option that is
not exercisable on the date of death shall terminate immediately and be of no
further force or effect.
(b)    Other Termination. If the Optionee’s Service Relationship terminates for
any reason other than the Optionee’s death, any portion of this Stock Option
outstanding on such date may be exercised, to the extent exercisable on the date
of such termination, for a period of three months from the date of termination
or until the Expiration Date, if earlier. Any portion of this Stock Option that
is not exercisable on the date of termination shall terminate immediately and be
of no further force or effect.
4.    Incorporation of Plan. Notwithstanding anything herein to the contrary,
this Stock Option shall be subject to and governed by all the terms and
conditions of the Plan, including the powers of the Administrator set forth in
Section 2(b) of the Plan. Capitalized terms in this Agreement shall have the
meaning specified in the Plan, unless a different meaning is specified herein.
5.    Transferability. This Agreement is personal to the Optionee, is
non-assignable and is not transferable in any manner, by operation of law or
otherwise, other than by will or the laws of descent and distribution. This
Stock Option is exercisable, during the Optionee’s lifetime, only by the
Optionee, and thereafter, only by the Optionee’s legal representative or
legatee.
6.    No Obligation to Continue as a Director. Neither the Plan nor this Stock
Option confers upon the Optionee any rights with respect to a continued Service
Relationship with the Company or a Subsidiary or any successor entity.
7.    Integration. This Agreement constitutes the entire agreement between the
parties with respect to this Stock Option and supersedes all prior agreements
and discussions between the parties concerning such subject matter.
8.    Data Privacy Consent. In order to administer the Plan and this Agreement
and to implement or structure future equity grants, the Company, its
subsidiaries and affiliates and certain agents thereof (together, the “Relevant
Companies”) may process any and all personal or professional data, including but
not limited to Social Security or other identification number, home address and
telephone number, date of birth and other information that is necessary or
desirable for the administration of the Plan and/or this Agreement (the
“Relevant Information”). By entering into this Agreement, the Optionee (i)
authorizes the Company to collect, process, register and transfer to the
Relevant Companies all Relevant Information; (ii) waives any privacy rights the
Optionee may have with respect to the Relevant Information; (iii) authorizes the
Relevant Companies to store and transmit such information in electronic form;
and (iv) authorizes the transfer of the Relevant Information to any jurisdiction
in which the Relevant Companies consider appropriate. The Optionee shall have
access to, and the right to change, the

3

--------------------------------------------------------------------------------

Relevant Information. Relevant Information will only be used in accordance with
applicable law.
9.    Notices. Notices hereunder shall be mailed or delivered to the Company at
its principal place of business and shall be mailed or delivered to the Optionee
at the address on file with the Company or, in either case, at such other
address as one party may subsequently furnish to the other party in writing.
10.    Acceptance of Option. The Optionee must execute this Agreement by logging
on to the Company’s administrative agent’s website for the Plan. IF THE OPTIONEE
DOES NOT ELECTRONICALLY ACCEPT THIS STOCK OPTION THROUGH THE WEBSITE WITHIN
THIRTY (30) DAYS FOLLOWING THE GRANT DATE AND THEREBY ACCEPT THE TERMS AND
CONDITIONS OF THIS AGREEMENT AND THE PLAN, THEN THE OPTIONEE WILL BE DEEMED TO
HAVE DECLINED THE STOCK OPTION AND THE STOCK OPTION WILL BE NULL AND VOID (AND
THE OPTIONEE WILL HAVE NO RIGHTS WITH RESPECT TO THE STOCK OPTION).

4

--------------------------------------------------------------------------------

RESTRICTED STOCK UNIT AWARD AGREEMENT
FOR COMPANY EMPLOYEES
2018 STOCK OPTION AND INCENTIVE PLAN
Name of Grantee:        
No. of Restricted Stock Units:        
Grant Date:        
Vesting Commencement Date:            
Pursuant to the Radius Health, Inc. 2018 Stock Option and Incentive Plan, as
amended through the date hereof (the “Plan”), Radius Health, Inc. (the
“Company”) hereby grants an award of the number of Restricted Stock Units listed
above (an “Award”) to the Grantee named above. Each Restricted Stock Unit shall
relate to one share of Common Stock, par value $0.0001 per share (the “Stock”)
of the Company.
1.    Restrictions on Transfer of Award. This Award may not be sold,
transferred, pledged, assigned or otherwise encumbered or disposed of by the
Grantee, and any shares of Stock issuable with respect to the Award may not be
sold, transferred, pledged, assigned or otherwise encumbered or disposed of
until (i) the Restricted Stock Units have vested as provided in Paragraph 2 of
this Agreement and (ii) shares of Stock have been issued to the Grantee in
accordance with the terms of the Plan and this Agreement.
2.    Vesting of Restricted Stock Units. The restrictions and conditions of
Paragraph 1 of this Agreement shall lapse, and the Restricted Stock Units shall
vest in four substantially equal annual installments on each of the first four
(4) anniversaries of the vesting commencement date set forth above (the “Vesting
Commencement Date”), such that the Restricted Stock Units will be fully vested
on the fourth anniversary of the Vesting Commencement Date, so long as the
Grantee has a continuing Service Relationship with the Company or a Subsidiary
or any successor entity on such dates. The restrictions and conditions in
Paragraph 1 shall lapse only with respect to the number of Restricted Stock
Units vested on such vesting date.
The Administrator may at any time accelerate the vesting schedule specified in
this Paragraph 2.
3.    Termination of Service Relationship. If the Grantee’s Service Relationship
with the Company or a Subsidiary or any successor entity terminates for any
reason (including death or disability) prior to the satisfaction of the vesting
conditions set forth in Paragraph 2 above, any Restricted Stock Units that have
not vested as of such date shall automatically and without notice terminate and
be forfeited, and neither the Grantee nor any of his or her successors, heirs,

--------------------------------------------------------------------------------

assigns, or personal representatives will thereafter have any further rights or
interests in such unvested Restricted Stock Units.
4.    Issuance of Shares of Stock. As soon as practicable following each Vesting
Date (but in no event later than two and one-half months after the end of the
year in which the Vesting Date occurs), the Company shall issue to the Grantee
the number of shares of Stock equal to the aggregate number of Restricted Stock
Units that have vested pursuant to Paragraph 2 of this Agreement on such date
and the Grantee shall thereafter have all the rights of a stockholder of the
Company with respect to such shares.
5.    Incorporation of Plan. Notwithstanding anything herein to the contrary,
this Agreement shall be subject to and governed by all the terms and conditions
of the Plan, including the powers of the Administrator set forth in Section 2(b)
of the Plan. Capitalized terms in this Agreement shall have the meaning
specified in the Plan, unless a different meaning is specified herein.
6.    Tax Withholding. Notwithstanding any Plan provision to the contrary,
unless the Administrator determines otherwise, the requirement for the Grantee
to satisfy all withholding obligations arising in connection with the Award will
be satisfied by placing a market sell order with a broker acceptable to the
Company covering a sufficient number of shares of Stock otherwise then-issuable
under the Award as are necessary to satisfy the statutory tax withholding
obligations arising in connection with the Award, as determined by the Company.
The net proceeds of such sale shall be delivered to the Company or its
applicable subsidiary upon the settlement of such sale. The Grantee acknowledges
that, unless otherwise determined by the Administrator, such market sell order
will be placed automatically and that it is mandatory, binding and
non-discretionary on the part of the Grantee. The Company shall have the
authority to cause the required tax withholding obligation to be satisfied, in
whole or in part, by withholding from shares of Stock to be issued to the
Grantee a number of shares of Stock with an aggregate Market Value that would
satisfy the withholding amount due.
7.    Section 409A of the Code. This Agreement shall be interpreted in such a
manner that all provisions relating to the settlement of the Award are exempt
from the requirements of Section 409A of the Code as “short-term deferrals” as
described in Section 409A of the Code.
8.    No Obligation to Continue Service Relationship. Neither the Company nor
any Subsidiary is obligated by or as a result of the Plan or this Agreement to
continue the Grantee’s Service Relationship with the Company or a Subsidiary or
any successor entity, and neither the Plan nor this Agreement shall interfere in
any way with the right of the Company or any Subsidiary to terminate the
Grantee’s Service Relationship at any time.
9.    Integration. This Agreement constitutes the entire agreement between the
parties with respect to this Award and supersedes all prior agreements and
discussions between the parties concerning such subject matter.

2

--------------------------------------------------------------------------------

10.    Data Privacy Consent. In order to administer the Plan and this Agreement
and to implement or structure future equity grants, the Company, its
subsidiaries and affiliates and certain agents thereof (together, the “Relevant
Companies”) may process any and all personal or professional data, including but
not limited to Social Security or other identification number, home address and
telephone number, date of birth and other information that is necessary or
desirable for the administration of the Plan and/or this Agreement (the
“Relevant Information”). By entering into this Agreement, the Grantee (i)
authorizes the Company to collect, process, register and transfer to the
Relevant Companies all Relevant Information; (ii) waives any privacy rights the
Grantee may have with respect to the Relevant Information; (iii) authorizes the
Relevant Companies to store and transmit such information in electronic form;
and (iv) authorizes the transfer of the Relevant Information to any jurisdiction
in which the Relevant Companies consider appropriate. The Grantee shall have
access to, and the right to change, the Relevant Information. Relevant
Information will only be used in accordance with applicable law.
11.    Notices. Notices hereunder shall be mailed or delivered to the Company at
its principal place of business and shall be mailed or delivered to the Grantee
at the address on file with the Company or, in either case, at such other
address as one party may subsequently furnish to the other party in writing.
12.    Acceptance of Award. The Grantee must execute this Agreement by logging
on to the Company’s administrative agent’s website for the Plan. IF THE GRANTEE
DOES NOT ELECTRONICALLY ACCEPT THIS AWARD THROUGH THE WEBSITE WITHIN THIRTY (30)
DAYS FOLLOWING THE GRANT DATE AND THEREBY ACCEPT THE TERMS AND CONDITIONS OF
THIS AGREEMENT AND THE PLAN, THEN THE GRANTEE WILL BE DEEMED TO HAVE DECLINED
THE AWARD AND THIS AWARD WILL BE NULL AND VOID (AND THE PARTICIPANT WILL HAVE NO
RIGHTS WITH RESPECT TO THE AWARD).

3

--------------------------------------------------------------------------------

RESTRICTED STOCK UNIT AWARD AGREEMENT
FOR NON-EMPLOYEE DIRECTORS
UNDER THE RADIUS HEALTH, INC.
2018 STOCK OPTION AND INCENTIVE PLAN
Name of Grantee:        
No. of Restricted Stock Units:        
Grant Date:        
Vesting Commencement Date:            
Pursuant to the Radius Health, Inc. 2018 Stock Option and Incentive Plan, as
amended through the date hereof (the “Plan”), Radius Health, Inc. (the
“Company”) hereby grants an award of the number of Restricted Stock Units listed
above (an “Award”) to the Grantee named above. Each Restricted Stock Unit shall
relate to one share of Common Stock, par value $0.0001 per share (the “Stock”)
of the Company.
1.    Restrictions on Transfer of Award. This Award may not be sold,
transferred, pledged, assigned or otherwise encumbered or disposed of by the
Grantee, and any shares of Stock issuable with respect to the Award may not be
sold, transferred, pledged, assigned or otherwise encumbered or disposed of
until (i) the Restricted Stock Units have vested as provided in Paragraph 2 of
this Agreement and (ii) shares of Stock have been issued to the Grantee in
accordance with the terms of the Plan and this Agreement.
2.    Vesting of Restricted Stock Units. The restrictions and conditions of
Paragraph 1 of this Agreement shall lapse, and the Restricted Stock Units shall
vest in full on the first anniversary of the vesting commencement date set forth
above (“Vesting Commencement Date”) so long as the Grantee has a continuing
Service Relationship with the Company or a Subsidiary or any successor entity on
such date.
The Administrator may at any time accelerate the vesting schedule specified in
this Paragraph 2.
3.    Termination of Service Relationship. If the Grantee’s Service Relationship
with the Company and its Subsidiaries or any successor entity terminates for any
reason (including death or disability) prior to the satisfaction of the vesting
conditions set forth in Paragraph 2 above, any Restricted Stock Units that have
not vested as of such date shall automatically and without notice terminate and
be forfeited, and neither the Grantee nor any of his or her successors, heirs,
assigns, or personal representatives will thereafter have any further rights or
interests in such unvested Restricted Stock Units.

--------------------------------------------------------------------------------

4.    Issuance of Shares of Stock. As soon as practicable following each Vesting
Date (but in no event later than two and one-half months after the end of the
year in which the Vesting Date occurs), the Company shall issue to the Grantee
the number of shares of Stock equal to the aggregate number of Restricted Stock
Units that have vested pursuant to Paragraph 2 of this Agreement on such date
and the Grantee shall thereafter have all the rights of a stockholder of the
Company with respect to such shares.
5.    Incorporation of Plan. Notwithstanding anything herein to the contrary,
this Agreement shall be subject to and governed by all the terms and conditions
of the Plan, including the powers of the Administrator set forth in Section 2(b)
of the Plan. Capitalized terms in this Agreement shall have the meaning
specified in the Plan, unless a different meaning is specified herein.
6.    Section 409A of the Code. This Agreement shall be interpreted in such a
manner that all provisions relating to the settlement of the Award are exempt
from the requirements of Section 409A of the Code as “short-term deferrals” as
described in Section 409A of the Code.
7.    No Obligation to Continue as a Director. Neither the Plan nor this Award
confers upon the Grantee any rights with respect to a continued Service
Relationship with the Company or a Subsidiary or any successor entity.
8.    Integration. This Agreement constitutes the entire agreement between the
parties with respect to this Award and supersedes all prior agreements and
discussions between the parties concerning such subject matter.
9.    Data Privacy Consent. In order to administer the Plan and this Agreement
and to implement or structure future equity grants, the Company, its
subsidiaries and affiliates and certain agents thereof (together, the “Relevant
Companies”) may process any and all personal or professional data, including but
not limited to Social Security or other identification number, home address and
telephone number, date of birth and other information that is necessary or
desirable for the administration of the Plan and/or this Agreement (the
“Relevant Information”). By entering into this Agreement, the Grantee (i)
authorizes the Company to collect, process, register and transfer to the
Relevant Companies all Relevant Information; (ii) waives any privacy rights the
Grantee may have with respect to the Relevant Information; (iii) authorizes the
Relevant Companies to store and transmit such information in electronic form;
and (iv) authorizes the transfer of the Relevant Information to any jurisdiction
in which the Relevant Companies consider appropriate. The Grantee shall have
access to, and the right to change, the Relevant Information. Relevant
Information will only be used in accordance with applicable law.

2

--------------------------------------------------------------------------------

10.    Notices. Notices hereunder shall be mailed or delivered to the Company at
its principal place of business and shall be mailed or delivered to the Grantee
at the address on file with the Company or, in either case, at such other
address as one party may subsequently furnish to the other party in writing.
11.    Acceptance of Award. The Grantee must execute this Agreement by logging
on to the Company’s administrative agent’s website for the Plan. IF THE GRANTEE
DOES NOT ELECTRONICALLY ACCEPT THIS AWARD THROUGH THE WEBSITE WITHIN THIRTY (30)
DAYS FOLLOWING THE GRANT DATE AND THEREBY ACCEPT THE TERMS AND CONDITIONS OF
THIS AGREEMENT AND THE PLAN, THEN THE GRANTEE WILL BE DEEMED TO HAVE DECLINED
THE AWARD AND THIS AWARD WILL BE NULL AND VOID (AND THE PARTICIPANT WILL HAVE NO
RIGHTS WITH RESPECT TO THE AWARD).

3