The remainder of this cover page shall be filled out for a reporting person’s initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter disclosures provided in a prior cover page.

  Name of Reporting Persons

I.R.S Identification Nos. of Above Persons

  Jeff Lawson

  Check the Appropriate Box if a Member of a Group

  (a)  ☐        (b)  ☐

  SEC Use Only

  Citizenship or Place of Organization

  United States of America

Number of

Shares

 Beneficially 

Owned by

Each

Reporting

Person

With

  Sole Voting Power

  680,148 (1)(3)

  Shared Voting Power

  6,275,693 (2)(3)

  Sole Dispositive Power

  680,148 (1)(3)

  Shared Dispositive Power

  6,275,693 (2)(3)

  Aggregate Amount Beneficially Owned by Each Reporting Person

6,955,841 (1)(2)(3)

  Check Box if the Aggregate Amount in Row (9) Excludes Certain Shares

  ☐

  Percent of Class Represented by Amount in Row 9

  4.2% (3)(4)(5)

  Type of Reporting Person

  IN

Consists of (i) 316,667 shares of Class B common stock subject to outstanding options that are exercisable within 60 days of December 31, 2020, (ii) 353,480 shares of Class A common stock subject to outstanding options that are exercisable within 60 days of December 31, 2020 and (iii) 10,001 shares of Class A common stock subject to outstanding restricted stock units for which the service vesting condition will be satisfied within 60 days of December 31, 2020. The reporting person has sole voting power and sole dispositive power with respect to these shares.

Consists of (i) 71,089 shares of Class A common stock and 5,171,399 shares of Class B common stock held of record by Mr. Lawson, as trustee of the Lawson Revocable Trust and (ii) 1,033,205 shares of Class B common stock held of record by the Lawson 2014 Irrevocable Trust, J.P. Morgan Trust Company, as trustee. Erica Lawson, Mr. Lawson’s wife, is also a trustee of the Lawson Revocable Trust. Mr. Lawson serves on an investment committee that holds voting and dispositive power over the Lawson 2014 Irrevocable Trust. The reporting person has shared voting power and shared dispositive power with respect to these shares.

Each share of Class A common stock is entitled to one vote and each share of Class B common stock is entitled to ten votes. Each share of Class B common stock is convertible into one share of Class A common stock at any time at the option of the holder and upon the occurrence of certain other events as described in the Issuer’s Amended and Restated Certificate of Incorporation. In addition, each share of Class B common stock will automatically convert into one share of Class A common stock upon any transfer, except for certain permitted transfers as described in the Issuer’s Amended and Restated Certificate of Incorporation.

The percent of class was calculated based on 153,496,222 shares of Class A common stock and 10,551,302 shares of Class B common stock outstanding as of December 31, 2020.

Based on the aggregate number of shares of Class B common stock beneficially owned by the reporting person, which pursuant to Rule 13d-3 of the Securities Exchange Act of 1934, as amended, is treated as converted into Class A common stock only for purposes of computing the percentage ownership of the reporting person. The percentage reported does not reflect the ten for one voting power of the Class B common stock. The 6,521,271 shares of Class B common stock and 434,570 shares of Class A common stock held by the reporting person represent 25.0% of the aggregate combined voting power of the Class A common stock and Class B common stock.

Item 1

(a)

Name of Issuer:

Twilio Inc.

(b)

Address of Issuer’s Principal Executive Offices:

101 Spear Street, First Floor, San Francisco, California 94105

Item 2

(a)

Name of Person Filing:

Jeff Lawson

(b)

Address of Principal Business Office or, if none, Residence:

c/o Twilio Inc.

101 Spear Street, First Floor, San Francisco, California 94105

(c)

Citizenship:

United States of America

(d)

Title of Class of Securities:

Class A common stock

(e)

CUSIP Number:

90138F 102

Item 3

If this statement is filed pursuant to §§240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:

(a)

☐

Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o).

(b)

☐

Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c).

(d)

☐

Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8).

(e)

☐

An investment adviser in accordance with §240.13d-1(b)(1)(ii)(E);

(f)

☐

An employee benefit plan or endowment fund in accordance with §240.13d-1(b)(1)(ii)(F);

(g)

☐

A parent holding company or control person in accordance with §240.13d-1(b)(1)(ii)(G);

(h)

☐

A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);

(i)

☐

A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);

(j)

☐

A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J);

(k)

☐

Group, in accordance with §240.13d-1(b)(1)(ii)(K). If filing as a non-U.S. institution in accordance with

§ 240.13d-1(b)(1)(ii)(J), please specify the type of institution:____________________________.

Item 4   Ownership.

(a) and (b)

Amount Beneficially Owned and Percent of Class:

434,570 shares of Class A common stock and 6,521,271 shares of Class B common stock, consisting of (i) 71,089 shares of Class A common stock and 5,171,399 shares of Class B common stock held of record by Mr. Lawson, as trustee of the Lawson Revocable Trust, (ii) 1,033,205 shares of Class B common stock held of record by the Lawson 2014 Irrevocable Trust, J.P. Morgan Trust Company, as trustee, (iii) 316,667 shares of Class B common stock subject to outstanding options that are exercisable within 60 days of December 31, 2020, (iv) 353,480 shares of Class A common stock subject to outstanding options that are exercisable within 60 days of December 31, 2020 and (v) 10,001 shares of Class A common stock subject to outstanding restricted stock units for which the service vesting condition will be satisfied within 60 days of December 31, 2020, which when such shares of Class B common stock are treated as converted into Class A common stock only for purposes of computing the percentage ownership of the reporting person pursuant to Rule 13d-3 of the Securities Exchange Act of 1934, as amended, represent approximately 4.2% of the outstanding shares of Class A common stock. The percentage reported does not reflect the ten for one voting power of the Class B common stock. The 6,521,271 shares of Class B common stock and 434,570 shares of Class A common stock held by the reporting person represent 25.0% of the aggregate combined voting power of the Class A common stock and Class B common stock. The percent of class was calculated based on 153,496,222 shares of Class A common stock and 10,551,302 shares of Class B common stock outstanding as of December 31, 2020.

Sole power to vote or direct the vote:

680,148

Shared power to vote or to direct the vote:

6,275,693

Sole power to dispose or to direct the disposition of:

680,148

Shared power to dispose or to direct the disposition of:

6,275,693

Ownership of Five Percent or Less of a Class.

Ownership of More than Five Percent on Behalf of Another Person.

Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on By the Parent Holding Company.

Identification and Classification of Members of the Group.

Notice of Dissolution of Group.

Certification.

/s/ Karyn Smith