RIVN Rivian Automotive, Inc. / De - 8-K

Item 1.01 - Entry into a Material Definitive Agreement.

Subscription Agreement

On March 18, 2026 (the “Effective Date”), Rivian Automotive,
Inc., a Delaware corporation (the “Company”), entered into a subscription agreement (the “Subscription Agreement”)
by and among the Company, SMB Holding Corporation (“SMB”) and Uber Technologies, Inc. (“Uber”), providing for
SMB’s investment in the Company through the sale and issuance of shares of the Company’s Class A common stock, par value $0.001
per share (the “Common Stock”), or at SMB’s election, in lieu of shares of Common Stock, pre-funded warrants (“Pre-Funded
Warrants”) to purchase the same amount of shares of Common Stock (the “Warrant Shares”), subject to the terms and conditions
set forth in the Subscription Agreement.

Pursuant to the Subscription Agreement, within five business days of
the satisfaction or waiver of customary closing conditions, including the receipt or waiver of required regulatory approvals, and upon
payment of $300 million by SMB, the Company will issue a number of shares of Common Stock to SMB equal to $300 million divided by the
price per share of Common Stock based on the arithmetic average of the daily volume-weighted average sale price for the thirty consecutive
trading days ending on March 17, 2026.

Further, upon
and subject to the occurrence of certain other Milestones (as defined in the Subscription Agreement, certain of which require the fulfillment
of proven autonomy quality), the Company will (depending on the Milestone achieved and contingent upon payment of the applicable purchase
price therefor) issue (i) up to a number of shares of Common Stock equal to , in the aggregate over four remaining Milestones, assuming
the achievement of all Milestones, (x) $950 million divided by (y) the price per share of Common Stock based on the arithmetic average
of the daily volume-weighted average sale price for the thirty consecutive trading days prior to, but not including, the applicable Milestone
Achievement Date (as defined in the Subscription Agreement) for such Milestone or (ii) at SMB’s election, in lieu of shares of Common
Stock, Pre-Funded Warrants to purchase the same amount of Warrant Shares.

The Company
or SMB may terminate the Subscription Agreement upon certain events, including, but not limited to in the event of a Governmental Order
(as defined in the Subscription Agreement) that permanently enjoins the consummation of the transactions contemplated by the Subscription
Agreement, a breach that has not been cured within the applicable cure period as set forth in the Subscription Agreement, or the
termination or expiration of the Master Framework Agreement (as defined below).

Pursuant to the Subscription Agreement, at any time following any Milestone
Closing Date (as defined in the Subscription Agreement), SMB may deliver to the Company a written request (a “Demand Request”)
that the Company prepare and file with the Securities and Exchange Commission a registration statement on Form S-3, or, if the Company
is not then eligible, on Form S-1, to effect a registration of any Common Stock held by or issued to SMB (the “Registrable Securities”),
covering the resale of the Registrable Securities. The obligations of the Company in respect of a Demand Request are subject to certain
exceptions, including that if such Demand Request relates to an underwritten offering, then it must be in respect of shares of Common
Stock with an aggregate offering value equal to at least $100 million.

The Pre-Funded Warrants will have an exercise price of $0.001 per Warrant
Share, subject to customary adjustments, and will be exercisable at any time after original issuance and will not expire until exercised
in full. The Pre-Funded Warrants will also be exercisable on a net exercise “cashless” basis. The Pre-Funded Warrants may
not be exercised if the aggregate number of shares of Common Stock beneficially owned by the holder thereof immediately following such
exercise would exceed a specified beneficial ownership limitation, not to exceed 19.99%.

The foregoing descriptions of the Subscription Agreement and Pre-Funded
Warrants do not purport to be complete and are qualified in their entirety by reference to the Subscription Agreement and form of Pre-Funded
Warrant, copies of which are filed herewith as Exhibits 10.1 and 4.1, respectively, and incorporated herein by reference.

Master Framework Agreement

On the Effective Date, in connection with the execution and delivery
of the Subscription Agreement, Rivian, LLC, a Delaware limited liability company and wholly-owned subsidiary of the Company ("Subsidiary"),
entered into a Master Framework Agreement (the "Master Framework Agreement") by and among the Subsidiary, the Company and Uber,
governing the collaboration between Subsidiary and Uber to develop, deploy, and operate autonomous vehicles on the Uber platform.

Pursuant to the Master Framework Agreement, Subsidiary and Uber will
work together to deploy Company Vehicles (as defined in the Master Framework Agreement), including the Company’s "R2"
model vehicle (or other mutually agreed-upon vehicle models) equipped with the Company’s Level 4 autonomous driving system, on Uber's
ridehailing and delivery platform.

The Master Framework Agreement provides for certain exclusivity arrangements
in favor of Uber. From the Effective Date until expiration of a specified exclusivity period, Subsidiary and its Affiliates (as defined
in the Master Framework Agreement) may not sell Company Vehicles enabled with the Company’s Level 4 autonomous driving system to
any Uber Direct Competitor (as defined in the Master Framework Agreement). If the parties determine to launch a deployment in a particular
market, Uber shall have a specified period in that market before Subsidiary or its Affiliates may sell Company Vehicles to or launch with
an Uber Direct Competitor, subject to certain conditions.

The
Master Framework Agreement also establishes volume guarantees and vehicle purchase commitments. Uber has committed to purchase a minimum
number of Company Vehicles during specified guarantee periods, with the purchase volume and pricing to be determined in accordance with
the procedures set forth in the Master Framework Agreement and related ancillary agreements. The pricing for vehicles and related services
is subject to most favored nation provisions for up to a specified number of vehicles . The parties
will mutually agree on pricing for the next phase of the relationship no later than one year after the achievement of a specified Milestone ,
which includes requirements relating to the fulfillment of proven autonomy quality. Uber will also pay certain
licensing fees in connection with its use of the Company’s Level 4 autonomous driving system software.

The Master
Framework Agreement has an initial term of ten years from the Effective Date, subject to consecutive one-year renewal periods upon
mutual written agreement. Either party may terminate the Master Framework Agreement upon certain events, including but not limited to
a material breach (subject to a 90-day cure period), specified insolvency events, or a party’s change of control to a direct competitor
of the other party.

The foregoing description of the Master Framework Agreement does not
purport to be complete and is qualified in its entirety by reference to the Master Framework Agreement, a copy of which is filed herewith
as Exhibit 10.2 and incorporated herein by reference.

Vehicle Production Agreement

On the Effective Date, in connection with the execution and delivery
of the Master Framework Agreement, Subsidiary and Uber entered into a Vehicle Production Agreement (the "Vehicle Production Agreement")
governing the design, development, and manufacture of Company Vehicles to be deployed on the Uber platform and Uber’s ordering mechanism
and pricing for such Company Vehicles.

Pursuant to
the Vehicle Production Agreement, Subsidiary will develop and manufacture autonomous robotaxi vehicles ("Company Robotaxis")
based on the Company’s R2 vehicle platform, equipped with the Company’s Level 4 autonomous driving system hardware and software.
The Vehicle Production Agreement sets forth the technical specifications, safety requirements, regulatory compliance standards ,
and warranty obligations for the Company Robotaxis.

The Vehicle Production Agreement establishes a forecasting and ordering
process pursuant to which Uber will provide purchase forecasts identifying the markets where it intends to deploy Company Robotaxis, the
number and timing of vehicles to be received, and applicable pricing.

The Vehicle Production Agreement's effectiveness commences on the Effective
Date and, unless sooner terminated, will continue until expiration or termination of the Master Framework Agreement. Either party may
terminate the Vehicle Production Agreement for cause upon material breach (subject to a 90-day cure period) or upon certain insolvency
events.

The foregoing description of the Vehicle Production Agreement does
not purport to be complete and is qualified in its entirety by reference to the Vehicle Production Agreement, a copy of which is filed
herewith as Exhibit 10.3 and incorporated herein by reference.

Item 3.02 - Unregistered Sales of Equity Securities.

The disclosure regarding the securities to be sold and issued under
the Subscription Agreement set forth in Item 1.01 above is incorporated by reference into this Item 3.02. The Company will issue the securities
to SMB in reliance on the exemption from registration provided for under Section 4(a)(2) of the Securities Act of 1933, as amended (the
“Securities Act”).

Neither this Current Report on Form 8-K nor any exhibit attached hereto
is an offer to sell or the solicitation of an offer to buy securities of the Company.

Item 7.01 – Regulation FD.

On March 19, 2026, the Company issued a press release announcing the
transactions with Uber and SMB described in Item 1.01 above. A copy of the press release is attached as Exhibit 99.1 to this Current Report
on Form 8-K and is incorporated herein by reference.

In addition, the Company no longer expects to be adjusted EBITDA positive
in 2027 due to an expected increase in R&D spend associated with the acceleration of its autonomy roadmap.

The information furnished pursuant to Item 7.01 of this Current Report
on Form 8-K, including Exhibit 99.1 attached hereto, shall not be deemed “filed” for purposes of Section 18 of the Securities
Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall
it be deemed incorporated by reference into any other filing under the Securities Act or the Exchange Act, regardless
of any general incorporation language in such filing, except as expressly set forth by specific reference in such filing.

Forward-Looking Statements

This Current Report on Form 8-K contains forward-looking statements
within the meaning of the Private Securities Litigation Reform Act of 1995, including, without limitation, statements regarding SMB’s
investment in the Company, the achievement of specified Milestones, potential payments to be made under the Subscription Agreement, the
timing of share issuances to SMB; the Company’s and Subsidiary’s collaboration with Uber on the development, production and
commercialization of Company Vehicles and Company Robotaxis; and the timing for the achievement by the Company of being adjusted EBITDA
positive, which statements are based on current expectations, forecasts, and assumptions and involve risks and uncertainties that could
cause actual results to differ materially from expectations discussed in such statements. These forward-looking statements can be identified
by terms such as “may,” “will,” “expects,” or the negative of these terms or other similar expressions,
although not all forward-looking statements use these words or expressions. The Company has based these forward-looking statements largely
on its current expectations and projections about future events and financial trends that it believes may affect its business, financial
condition, and results of operations. These forward-looking statements are only predictions and may differ materially from actual results
due to a variety of factors. Forward-looking statements involve known and unknown risks, uncertainties and other important factors that
may cause our actual results, performance, or achievements to be materially different from any future results, performance, or achievements
expressed or implied by the forward-looking statements, including, but not limited to, general market, political, economic and business
conditions and the important factors discussed in Part I, Item 1A, “Risk Factors” in the Company’s Annual Report on
Form 10-K for the year ended December 31, 2025, and its other filings with the Securities and Exchange Commission. The forward-looking
statements included in this Current Report on Form 8-K speak only as of the date of this Current Report on Form 8-K, and the Company does
not undertake to update the statements included in this Current Report on Form 8-K for subsequent developments, except as may be required
by law.

Item 9.01 - Financial Statements and Exhibits.

(d) Exhibits:

Exhibit

No.

Description

4.1

Form of Pre-Funded Warrant

10.1^†

Subscription Agreement, dated as of March 18, 2026, by and among Rivian Automotive, Inc., SMB Holding Corporation and Uber Technologies, Inc.

10.2^†

Master Framework Agreement, dated as of March 18, 2026, by and among Rivian Automotive, Inc., Rivian, LLC and Uber Technologies, Inc.

10.3^†

Vehicle Production Agreement, dated as of March 18, 2026, by and between Rivian, LLC and Uber Technologies, Inc.

99.1

Press Release, dated March 19, 2026

104

Cover Page Interactive Data File (embedded within the Inline XBRL document)

†

Portions of this exhibit (indicated by asterisks) have
been redacted in compliance with Regulation S-K Item 601(b)(10)(iv).

^

Certain schedules and exhibits have been omitted pursuant
to Item 601(a)(5) of Regulation S-K. The registrant undertakes to provide copies of any of the omitted exhibits upon request by the Securities
and Exchange Commission.