Washington, D.C. 20549


Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB Number: 3235-0104
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hours per response: 0.5
1. Name and Address of Reporting Person*
Hemmeter Christopher

(Last) (First) (Middle)


(City) (State) (Zip)
2. Date of Event Requiring Statement (Month/Day/Year)
3. Issuer Name and Ticker or Trading Symbol
Thayer Ventures Acquisition Corp [ TVAC ]
4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
X Director X 10% Owner
X Officer (give title below) Other (specify below)
See Footnote (3)
5. If Amendment, Date of Original Filed (Month/Day/Year)
6. Individual or Joint/Group Filing (Check Applicable Line)
X Form filed by One Reporting Person
Form filed by More than One Reporting Person
Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4) 2. Amount of Securities Beneficially Owned (Instr. 4) 3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 4. Nature of Indirect Beneficial Ownership (Instr. 5)
Class B Common Stock(1) 4,187,500(2) I See Footnote(3)
Table II - Derivative Securities Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4) 2. Date Exercisable and Expiration Date (Month/Day/Year) 3. Title and Amount of Securities Underlying Derivative Security (Instr. 4) 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 6. Nature of Indirect Beneficial Ownership (Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares
Explanation of Responses:
1. The shares will automatically convert into Class A Common Stock at the time of the Issuer's initial business combination.
2. Includes up to 562,500 shares that are subject to forfeiture in the event the underwriters of the initial public offering of the Issuer's securities do not exercise in full their over-allotment option as described in the Issuer's registration statement.
3. The shares are held by Thayer Ventures Acquisition Holdings LLC ("Sponsor"). The Reporting Person serves as a manager of Sponsor, and disclaims beneficial ownership of the shares held by Sponsor except to the extent of his pecuniary interest therein.
Officer Title: Co-Chief Executive Officer, Co-President and Chief Financial Officer Exhibit 24: Power of Attorney
/s/ Christopher Hemmeter 12/10/2020
** Signature of Reporting Person Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
                             LIMITED POWER OF ATTORNEY

    The undersigned hereby constitutes and appoints each of Nathan M. Needle and
Austin Abir, each of Goodwin Procter LLP, signing singly, and with full power of
substitution, the undersigned's true and lawful attorney-in-fact to:

    (1)   execute for and on behalf of the undersigned, from time to time a Form
ID, including any attached documents (such as Update Passphrase Authentication),
to effect the assignment of codes to the undersigned to be used in the
transmission of information to the U.S. Securities and Exchange Commission
("SEC") using the EDGAR System; and

    (2)   take any other action of any type whatsoever in connection with the
foregoing which, in the opinion of such attorney-in-fact, may be of benefit to,
in the best interest of, or legally required by, the undersigned, it being
understood that the documents executed by such attorney-in-fact on behalf of the
undersigned pursuant to this Power of Attorney shall be in such form and shall
contain such terms and conditions as such attorney-in-fact may approve in such
attorney-in-fact's discretion.

    The undersigned hereby grants to each such attorney-in-fact, acting singly,
full power and authority to do and perform any and every act and thing
whatsoever requisite, necessary or proper to be done in the exercise of any of
the rights and powers herein granted, as fully to all intents and purposes as
the undersigned might or could do if personally present, with full power of
substitution or revocation, hereby ratifying and confirming all that such
attorney-in-fact, or such attorney-in-fact's substitute or substitutes, shall
lawfully do or cause to be done by virtue of this power of attorney and the
rights and powers herein granted.  The undersigned acknowledges that the
foregoing attorneys-in-fact, in serving in such capacity at the request of the
undersigned, are not assuming, any of the undersigned's responsibilities to
comply with the Securities Exchange Act of 1934, as amended. The undersigned
hereby agrees to indemnify the attorneys-in-fact from and against any demand,
damage, loss, cost or expense arising from any false or misleading information
provided by the undersigned to the attorneys-in-fact.

    This Power of Attorney shall remain in full force and effect until the
earlier of it being revoked by the undersigned in a signed writing delivered to
the foregoing attorneys-in-fact or superseded by a new power of attorney
regarding the purposes outlined herein as of a later date. This Power of
Attorney supersedes any prior power of attorney in connection with respect to
the subject matter of this Power of Attorney. This Power of Attorney shall
expire as to any individual attorney-in-fact if such attorney-in-fact ceases to
be an employee of Goodwin Procter LLP.

    IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be
executed as of September 30, 2020.

                        /s/ Christopher Hemmeter

                        Christopher Hemmeter
                        Print Name