Fastly technology chief's trust sells 379,602 shares

The trust's sales were effected under a Rule 10b5-1 plan adopted by Fastly's Chief Technology Officer on June 4, 2026.

Rhea-AI Filing Summary

Fastly, Inc. (FSLY) Chief Technology Officer and director Artur Bergman reported that The Per Artur Bergman Revocable Trust sold 379,602 Class A shares on September 23, 2026. Weighted-average prices per share were $28.0400 for 7,600 shares, $29.1700 for 24,300, $30.1500 for 262,185, and $30.6500 for 85,517. The sales were effected under a Rule 10b5-1 trading plan adopted by Bergman on June 4, 2026; he is the trust’s settlor, sole trustee and sole beneficiary. Separately, Bergman held 1,896,249 shares directly as of September 23, 2026.

Insider Trade Summary 10b5-1

Net Seller: 379,602 shares

Net Sell 10 txns

Insider Bergman Artur

Role Chief Technology Officer

Sold 379,602 shs ($11.45M)

Type	Security	Shares	Price	Value
Sale	Class A Common Stock F1, F2, F3	7,600	$28.04	$213K
Sale	Class A Common Stock F1, F4, F3	24,300	$29.17	$709K
Sale	Class A Common Stock F1, F5, F3	262,185	$30.15	$7.90M
Sale	Class A Common Stock F1, F6, F3	85,517	$30.65	$2.62M
holding	Class A Common Stock	--	--	--
holding	Class A Common Stock F7	--	--	--
holding	Class A Common Stock F8	--	--	--
holding	Class A Common Stock F9	--	--	--
holding	Class A Common Stock F10	--	--	--
holding	Class A Common Stock F11	--	--	--

Holdings After Transaction: Class A Common Stock — 1,138,358 shares (Indirect, See Footnote.); Class A Common Stock — 1,896,249 shares (Direct); Class A Common Stock — 1,949,691 shares (Indirect, See Footnote)

Footnotes (11)

1. F1. The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 4, 2026.
2. F2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $27.50 to $28.49, 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 (2), (4), (5) and (6) to this Form 4.
3. F3. The shares are held by The Per Artur Bergman Revocable Trust, of which the reporting person is settlor, sole trustee, and sole beneficiary.
4. F4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $28.50 to $29.49, inclusive.
5. F5. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $29.50 to $30.49, inclusive.
6. F6. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $30.50 to $31.25, inclusive.
7. F7. The shares are held by The Artur Bergman Remainder Trust One DTD 5/2/2019, of which the reporting person is the investment advisor.
8. F8. The shares are held by The Artur Bergman Remainder Trust Three DTD 5/2/2019, of which the reporting person is the investment advisor.
9. F9. The shares are held by The PAB 2021 Remainder Trust, of which the reporting person is the investment advisor.
10. F10. The shares are held by The Per Artur Bergman Grantor Retained Annuity Trust No. 4, of which the reporting person is trustee.
11. F11. The shares are held by The Per Artur Bergman Grantor Retained Annuity Trust No. 5, of which the reporting person is trustee.

Key Figures

Shares sold: 379,602 shares Weighted-average sale price: $28.0400 per share Weighted-average sale price: $29.1700 per share +3 more

6 metrics

Shares sold 379,602 shares Reported sales on September 23, 2026

Weighted-average sale price $28.0400 per share 7,600 shares; September 23, 2026

Weighted-average sale price $29.1700 per share 24,300 shares; September 23, 2026

Weighted-average sale price $30.1500 per share 262,185 shares; September 23, 2026

Weighted-average sale price $30.6500 per share 85,517 shares; September 23, 2026

Direct shares held 1,896,249 shares As of September 23, 2026

Key Terms

Rule 10b5-1 trading plan, weighted average price, settlor

3 terms

Rule 10b5-1 trading plan regulatory

"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.

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.

settlor technical

"reporting person is settlor, sole trustee, and sole beneficiary"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many FSLY shares did Artur Bergman's trust sell?

The Per Artur Bergman Revocable Trust reported sales totaling 379,602 Class A shares on September 23, 2026. Weighted-average prices were $28.0400 for 7,600 shares ($27.50–$28.49), $29.1700 for 24,300 ($28.50–$29.49), $30.1500 for 262,185 ($29.50–$30.49), and $30.6500 for 85,517 ($30.50–$31.25), inclusive.

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

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Available on EDGAR 09/25/2026 - 04:50 PM Accepted by SEC EDGAR 09/25/2026 - 04:50 PM Learn about SEC filing dates

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).

X

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^*

Bergman Artur

(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)
	Chief Technology Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/23/2026

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)
			Code	V	Amount	(A) or (D)	Price
Class A Common Stock	09/23/2026		S(1)		7,600	D	$28.04(2)	1,510,360	I	See Footnote.(3)
Class A Common Stock	09/23/2026		S(1)		24,300	D	$29.17(4)	1,486,060	I	See Footnote.(3)
Class A Common Stock	09/23/2026		S(1)		262,185	D	$30.15(5)	1,223,875	I	See Footnote.(3)
Class A Common Stock	09/23/2026		S(1)		85,517	D	$30.65(6)	1,138,358	I	See Footnote.(3)
Class A Common Stock								1,896,249	D
Class A Common Stock								840,005	I	See Footnote(7)
Class A Common Stock								109,686	I	See Footnote(8)
Class A Common Stock								156,521	I	See Footnote(9)
Class A Common Stock								588,671	I	See Footnote(10)
Class A Common Stock								254,808	I	See Footnote(11)

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)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. The sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 4, 2026.

2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $27.50 to $28.49, 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 (2), (4), (5) and (6) to this Form 4.

3. The shares are held by The Per Artur Bergman Revocable Trust, of which the reporting person is settlor, sole trustee, and sole beneficiary.

4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $28.50 to $29.49, inclusive.

5. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $29.50 to $30.49, inclusive.

6. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $30.50 to $31.25, inclusive.

7. The shares are held by The Artur Bergman Remainder Trust One DTD 5/2/2019, of which the reporting person is the investment advisor.

8. The shares are held by The Artur Bergman Remainder Trust Three DTD 5/2/2019, of which the reporting person is the investment advisor.

9. The shares are held by The PAB 2021 Remainder Trust, of which the reporting person is the investment advisor.

10. The shares are held by The Per Artur Bergman Grantor Retained Annuity Trust No. 4, of which the reporting person is trustee.

11. The shares are held by The Per Artur Bergman Grantor Retained Annuity Trust No. 5, of which the reporting person is trustee.

Remarks:

	/s/ Tara Seracka, Attorney-in-Fact	09/25/2026
	** 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)