Fastly (NYSE: FSLY) CEO sells 29,533 shares under 10b5-1 plan

Filing Impact

(Very High)

Filing Sentiment

(Negative)

Form Type

Rhea-AI Filing Summary

Fastly, Inc. CEO Charles Lacey Compton III reported open-market sales of 29,533 shares of Class A common stock. The sales occurred on April 16–17, 2026 at weighted average prices around $23.69–$25.40 per share. After these trades, he directly owns 1,133,895 shares.

According to the footnotes, the sales were executed under a pre-arranged Rule 10b5-1 trading plan and include shares sold to cover tax obligations tied to vesting of previously granted Restricted Stock Units.

Insider Trade Summary 10b5-1

Net Seller: 29,533 shares ($720,313)

Net Sell 4 txns

Insider Compton Charles Lacey III

Role CEO

Sold 29,533 shs ($720K)

Type	Security	Shares	Price	Value
Sale	Class A Common Stock	6,659	$24.52	$163K
Sale	Class A Common Stock	400	$25.40	$10K
Sale	Class A Common Stock	11,042	$25.00	$276K
Sale	Class A Common Stock	11,432	$23.69	$271K

Holdings After Transaction: Class A Common Stock — 1,134,295 shares (Direct, null)

Footnotes (1)

The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 27, 2025. Shares sold to satisfy tax obligations in connection with the vesting of previously granted Restricted Stock Units. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $24.06 to $24.94, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes 3 and 4 to this Form 4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $25.16 to $25.99, inclusive.

Key Figures

Shares sold: 29,533 shares Sale prices: $23.69–$25.40 per share Post-transaction holdings: 1,133,895 shares +2 more

5 metrics

Shares sold 29,533 shares Aggregate open-market sales reported on April 16–17, 2026

Sale prices $23.69–$25.40 per share Reported weighted average prices for four sale transactions

Post-transaction holdings 1,133,895 shares Direct Class A common stock ownership after April 17, 2026 sale

Single largest sale 11,432 shares Class A shares sold on April 16, 2026 at $23.69 per share

Largest reported price $25.40 per share Price for 400-share sale on April 17, 2026

Key Terms

Rule 10b5-1 trading plan, Restricted Stock Units, weighted average price, open-market sale

4 terms

Rule 10b5-1 trading plan regulatory

"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan..."

A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.

Restricted Stock Units financial

"Shares sold to satisfy tax obligations in connection with the vesting of previously granted Restricted Stock Units."

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 price reported in Column 4 is a weighted average price."

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.

open-market sale financial

"transaction_action": "open-market sale""

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

Form 4 Insider Transactions: What Each Field Means →

04/20/2026 - 05:07 PM

SEC Form 4

FORM 4

UNITED 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^*

Compton Charles Lacey III

(Last)

(First)

(Middle)

C/O FASTLY, INC.

475 BRANNAN STREET, SUITE 300

(Street)

SAN FRANCISCO

CALIFORNIA

94107

(City)

(State)

(Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Fastly, Inc. [ FSLY ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director	10% Owner
X	Officer (give title below)	Other (specify below)
	CEO

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
04/16/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form 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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Class A Common Stock	04/16/2026		S⁽¹⁾		11,042	D	$25	1,152,386	D
Class A Common Stock	04/16/2026		S⁽²⁾		11,432	D	$23.69	1,140,954	D
Class A Common Stock	04/17/2026		S⁽¹⁾		6,659	D	$24.52⁽³⁾	1,134,295	D
Class A Common Stock	04/17/2026		S⁽¹⁾		400	D	$25.4⁽⁴⁾	1,133,895	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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

Explanation of Responses:

1. The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 27, 2025.

2. Shares sold to satisfy tax obligations in connection with the vesting of previously granted Restricted Stock Units.

3. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $24.06 to $24.94, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnotes 3 and 4 to this Form 4.

4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $25.16 to $25.99, inclusive.

Remarks:

	/s/ Tara Seracka, Attorney-in-Fact	04/20/2026
	** 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 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

FAQ

What did Fastly (FSLY) CEO report in this Form 4 filing?

Fastly CEO Charles Lacey Compton III reported selling 29,533 shares of Class A common stock in open-market transactions. These trades were executed over April 16–17, 2026 under a Rule 10b5-1 trading plan, with some shares sold to cover tax obligations.

How many Fastly (FSLY) shares does the CEO still hold after these sales?

After the reported transactions, the CEO directly holds 1,133,895 shares of Fastly Class A common stock. This figure reflects his ownership following the April 17, 2026 sale and provides context for the relative size of the 29,533 shares sold.

At what prices did the Fastly (FSLY) CEO sell his shares?

The CEO’s reported sales occurred at weighted average prices around $23.69 to $25.40 per share. Footnotes note that actual trades were executed in multiple transactions within ranges of $24.06–$24.94 and $25.16–$25.99, with full details available upon request.

Were Fastly (FSLY) CEO’s stock sales part of a Rule 10b5-1 plan?

Yes. The filing states the sales were executed under a Rule 10b5-1 trading plan adopted by the reporting person on August 27, 2025. Such pre-arranged plans schedule trades in advance, helping separate routine portfolio management from discretionary timing decisions.

Did the Fastly (FSLY) CEO sell shares to cover tax obligations?

The filing notes that some shares were sold to satisfy tax obligations related to the vesting of previously granted Restricted Stock Units. This type of sale is a common mechanism for executives to handle tax liabilities arising from equity compensation vesting events.