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  4. [Form 4] TWILIO INC Insider Trading Activity

Twilio (TWLO) CFO’s 1,394-share stock sale is tax-driven

Filing Impact
(High)
Filing Sentiment
(Negative)
Form Type
4

Rhea-AI Filing Summary

TWILIO INC (TWLO) reported that Chief Financial Officer Aidan Viggiano sold a total of 1,394 shares of Class A common stock on August 17, 2026. The shares were sold in open-market transactions solely to cover statutory tax withholding obligations arising from the vesting of Restricted Stock Units, under a mandated "sell-to-cover" arrangement, and are described as not a discretionary sale. The sales occurred at weighted average prices within ranges spanning approximately $232.8450–$238.18 per share. A portion of the remaining holdings consists of RSUs, each representing a contingent right to receive one Class A share.

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Insider Viggiano Aidan
Role Chief Financial Officer
Sold 1,394 shs ($327K)
Type Security Shares Price Value
Sale Class A Common Stock F1, F2, F3 610 $233.3246 $142K
Sale Class A Common Stock F1, F4, F3 310 $234.3007 $73K
Sale Class A Common Stock F1, F5, F3 304 $234.9525 $71K
Sale Class A Common Stock F1, F6, F3 170 $238.0976 $40K
Holdings After Transaction: Class A Common Stock — 108,330 shares (Direct)
Footnotes (6)
  1. F1. Represents the number of shares sold to cover the statutory tax withholding obligations in connection with the vesting of Restricted Stock Units ("RSUs"). This sale is mandated by the Issuer's election under its equity incentive plans to require the satisfaction of minimum statutory tax withholding obligations to be funded by a "sell-to-cover" transaction and does not represent a discretionary sale by the Reporting Person.
  2. F2. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $232.8450 to $233.8250 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or to the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
  3. F3. A portion of these shares represent RSUs. Each RSU represents a contingent right to receive one share of the Issuer's Class A common stock.
  4. F4. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $233.86 to $234.66 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or to the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
  5. F5. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $234.8850 to $235.07 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or to the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
  6. F6. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $237.98 to $238.18 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or to the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
Total shares sold 1,394 shares Aggregate Class A shares sold by CFO Aidan Viggiano on August 17, 2026
Block sale 1 610 shares at $233.3246 per share First reported transaction in Class A common stock on August 17, 2026
Block sale 2 310 shares at $234.3007 per share Second reported transaction in Class A common stock on August 17, 2026
Block sale 3 304 shares at $234.9525 per share Third reported transaction in Class A common stock on August 17, 2026
Block sale 4 170 shares at $238.0976 per share Fourth reported transaction in Class A common stock on August 17, 2026
Price range block 1 $232.8450–$233.8250 per share Weighted average price range for the first group of sales
Highest reported price range $237.98–$238.18 per share Weighted average price range for the final group of sales
sell-to-cover financial
"funded by a "sell-to-cover" transaction and does not represent a discretionary"
Sell-to-cover is when part of newly issued or exercised company stock is immediately sold to pay required taxes and fees, so the recipient keeps the remaining shares. For investors this matters because it reduces the number of shares insiders or employees actually hold after a grant, can create small, routine share sales that aren’t signal of cashing out, and slightly increases share supply on the market—like selling a portion of a paycheck to cover the tax bill.
Restricted Stock Units financial
"in connection with the vesting of Restricted Stock Units ("RSUs"). This sale"
Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.
weighted average price financial
"The reported price in Column 4 is a weighted average price. These shares"
Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.
contingent right financial
"Each RSU represents a contingent right to receive one share of the"

FAQ

What insider transaction did TWLO report for CFO Aidan Viggiano on August 17, 2026?
TWLO reported that CFO Aidan Viggiano sold 1,394 shares of Class A common stock on August 17, 2026. The transactions were open-market sales executed to satisfy statutory tax withholding obligations tied to RSU vesting under a mandated sell-to-cover arrangement.

Were the August 17, 2026 TWLO stock sales by the CFO discretionary?
No. The filing states the 1,394-share sale was conducted to cover statutory tax withholding obligations from RSU vesting. It explicitly notes this sell-to-cover structure is mandated under Twilio’s equity incentive plans and “does not represent a discretionary sale” by the reporting person.

What prices were received in the TWLO CFO’s August 17, 2026 sell-to-cover trades?
The Form 4 reports weighted average prices around $233–$238 per share. Footnotes specify ranges: $232.8450–$233.8250, $233.86–$234.66, $234.8850–$235.07, and $237.98–$238.18, with detailed breakdowns available upon request.

How many TWLO shares did the CFO sell in each reported transaction on August 17, 2026?
On August 17, 2026, the CFO sold 610, 310, 304, and 170 shares of Twilio Class A common stock in four separate transactions. Together, these mandated sell-to-cover trades totaled 1,394 shares to satisfy RSU-related tax withholding obligations.

What does the Form 4 say about the TWLO CFO’s remaining RSU holdings?
The filing notes that a portion of the reported shares represent RSUs, with each RSU being a contingent right to receive one Class A share. It indicates ongoing equity-based compensation but does not quantify the exact number of RSUs remaining after these transactions.

Do the August 17, 2026 TWLO insider sales involve derivatives or options?
No derivative transactions are reported. All four entries involve non-derivative Class A common stock sold to cover RSU tax withholding. The derivative summary section in the data is empty, indicating no option exercises or other derivative activities in this filing.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Form 4 Insider Transactions: What Each Field Means →
SEC Form 4
FORM 4UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

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 APPROVAL
OMB Number:3235-0287
Estimated average burden
hours per response:0.5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
1. Name and Address of Reporting Person*
Viggiano Aidan
(Last)(First)(Middle)
101 SPEAR STREET, FIFTH FLOOR
(Street)
SAN FRANCISCO CALIFORNIA 94105
(City)(State)(Zip)
UNITED STATES
(Country)		2. Issuer Name and Ticker or Trading Symbol
TWILIO INC [ TWLO ] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director10% Owner
XOfficer (give title below)Other (specify below)
Chief Financial Officer
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
08/17/2026		6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year)2A. Deemed Execution Date, if any (Month/Day/Year)3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeVAmount(A) or (D)Price
Class A Common Stock08/17/2026S610(1)D$233.3246(2)109,114(3)D
Class A Common Stock08/17/2026S310(1)D$234.3007(4)108,804(3)D
Class A Common Stock08/17/2026S304(1)D$234.9525(5)108,500(3)D
Class A Common Stock08/17/2026S170(1)D$238.0976(6)108,330(3)D
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year)3A. Deemed Execution Date, if any (Month/Day/Year)4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year)7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Explanation of Responses:
1. Represents the number of shares sold to cover the statutory tax withholding obligations in connection with the vesting of Restricted Stock Units ("RSUs"). This sale is mandated by the Issuer's election under its equity incentive plans to require the satisfaction of minimum statutory tax withholding obligations to be funded by a "sell-to-cover" transaction and does not represent a discretionary sale by the Reporting Person.
2. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $232.8450 to $233.8250 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or to the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
3. A portion of these shares represent RSUs. Each RSU represents a contingent right to receive one share of the Issuer's Class A common stock.
4. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $233.86 to $234.66 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or to the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
5. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $234.8850 to $235.07 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or to the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
6. The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $237.98 to $238.18 per share, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or to the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
Remarks:
/s/ Juliana Chen as attorney-in-fact for Reporting Person08/19/2026
** Signature of Reporting PersonDate
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 4 (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.
* Form 4: SEC 1474 (03-26)

Source: View Original Filing on SEC EDGAR