Notice of Proposed Sale · 144

Lumentum Holdings Inc.

LITENASDAQEQUITYCurrent

Notice of Proposed Sale

Filed Sep 23, 2026Accepted Sep 23, 2026, 4:02 PM EDTFiling CIK 1633978Accession 0001950047-26-009762

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Structured filing — 144

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Notice of proposed sale. The proposed amounts below do not establish that a sale occurred.

Proposed-sale notice

Issuer: LUMENTUM HOLDINGS INC.
Issuer CIK: 0001633978
SEC file number: 001-36861
Phone: (408) 546-5483
Person for whose account securities are to be sold: WUPEN YUEN
Relationships to issuer: Officer
Street: 1001 Ridder Park Drive
City: San Jose
State / country code: CA
Postal code: 95131

Securities proposed for sale

Securities proposed for sale · 1 reported row
Security	Proposed units	Aggregate market value	Units outstanding	Approximate sale date	Exchange	Broker / market maker
Common	500	473,280.00	89,700,000	09/23/2026	NASDAQ	Morgan Stanley Smith Barney LLC Executive Financial Services

Broker / market maker — proposed row 1, entry 1

Name: Morgan Stanley Smith Barney LLC Executive Financial Services
Street: 1 New York Plaza
Street (continued): 8th Floor
City: New York
State / country code: NY
Postal code: 10004

Acquisition of securities to be sold

Acquisition of securities to be sold · 1 reported row
Security	Acquired	Nature of acquisition	Acquired from	Amount acquired	Gift transaction	Payment date	Nature of payment
Common	08/21/2025	Restricted Stock	ISSUER	500	N	08/21/2025	Not Applicable

Sales reported in the preceding three months

Sales reported in the preceding three months · 23 reported rows
Seller	Security	Sale date	Amount sold	Gross proceeds
WUPEN YUEN	Common	09/22/2026	500	467,775.00
WUPEN YUEN	Common	09/21/2026	500	479,635.00
WUPEN YUEN	Common	09/18/2026	500	460,000.00
WUPEN YUEN	Common	09/17/2026	500	466,725.00
WUPEN YUEN	Common	09/16/2026	500	428,415.00
WUPEN YUEN	Common	09/15/2026	500	420,755.00
WUPEN YUEN	Common	09/14/2026	500	431,070.00
WUPEN YUEN	Common	09/11/2026	500	472,205.00
WUPEN YUEN	Common	09/10/2026	500	480,720.00
WUPEN YUEN	Common	09/09/2026	500	489,270.00
WUPEN YUEN	Common	09/08/2026	500	447,995.00
WUPEN YUEN	Common	09/04/2026	500	430,000.00
WUPEN YUEN	Common	09/03/2026	500	435,005.00
WUPEN YUEN	Common	09/02/2026	500	432,245.00
WUPEN YUEN	Common	09/01/2026	500	450,520.00
WUPEN YUEN	Common	08/31/2026	500	447,500.00
WUPEN YUEN	Common	08/28/2026	500	470,475.00
WUPEN YUEN	Common	08/27/2026	500	479,330.00
WUPEN YUEN	Common	08/26/2026	500	441,075.00
WUPEN YUEN	Common	08/25/2026	500	428,322.50
WUPEN YUEN	Common	08/24/2026	500	412,120.00
WUPEN YUEN	Common	08/21/2026	500	449,075.00
WUPEN YUEN	Common	08/20/2026	1,500	1,241,730.00

Seller — prior-sale row 1, entry 1

Name: WUPEN YUEN
Street: 1001 Ridder Park Drive
City: San Jose
State / country code: CA
Postal code: 95131

Seller — prior-sale row 2, entry 1

Name: WUPEN YUEN
Street: 1001 Ridder Park Drive
City: San Jose
State / country code: CA
Postal code: 95131

Seller — prior-sale row 3, entry 1

Name: WUPEN YUEN
Street: 1001 Ridder Park Drive
City: San Jose
State / country code: CA
Postal code: 95131

Seller — prior-sale row 4, entry 1

Name: WUPEN YUEN
Street: 1001 Ridder Park Drive
City: San Jose
State / country code: CA
Postal code: 95131

Seller — prior-sale row 5, entry 1

Name: WUPEN YUEN
Street: 1001 Ridder Park Drive
City: San Jose
State / country code: CA
Postal code: 95131

Seller — prior-sale row 6, entry 1

Name: WUPEN YUEN
Street: 1001 Ridder Park Drive
City: San Jose
State / country code: CA
Postal code: 95131

Seller — prior-sale row 7, entry 1

Name: WUPEN YUEN
Street: 1001 Ridder Park Drive
City: San Jose
State / country code: CA
Postal code: 95131

Seller — prior-sale row 8, entry 1

Name: WUPEN YUEN
Street: 1001 Ridder Park Drive
City: San Jose
State / country code: CA
Postal code: 95131

Seller — prior-sale row 9, entry 1

Name: WUPEN YUEN
Street: 1001 Ridder Park Drive
City: San Jose
State / country code: CA
Postal code: 95131

Seller — prior-sale row 10, entry 1

Name: WUPEN YUEN
Street: 1001 Ridder Park Drive
City: San Jose
State / country code: CA
Postal code: 95131

Seller — prior-sale row 11, entry 1

Name: WUPEN YUEN
Street: 1001 Ridder Park Drive
City: San Jose
State / country code: CA
Postal code: 95131

Seller — prior-sale row 12, entry 1

Name: WUPEN YUEN
Street: 1001 Ridder Park Drive
City: San Jose
State / country code: CA
Postal code: 95131

Seller — prior-sale row 13, entry 1

Name: WUPEN YUEN
Street: 1001 Ridder Park Drive
City: San Jose
State / country code: CA
Postal code: 95131

Seller — prior-sale row 14, entry 1

Name: WUPEN YUEN
Street: 1001 Ridder Park Drive
City: San Jose
State / country code: CA
Postal code: 95131

Seller — prior-sale row 15, entry 1

Name: WUPEN YUEN
Street: 1001 Ridder Park Drive
City: San Jose
State / country code: CA
Postal code: 95131

Seller — prior-sale row 16, entry 1

Name: WUPEN YUEN
Street: 1001 Ridder Park Drive
City: San Jose
State / country code: CA
Postal code: 95131

Seller — prior-sale row 17, entry 1

Name: WUPEN YUEN
Street: 1001 Ridder Park Drive
City: San Jose
State / country code: CA
Postal code: 95131

Seller — prior-sale row 18, entry 1

Name: WUPEN YUEN
Street: 1001 Ridder Park Drive
City: San Jose
State / country code: CA
Postal code: 95131

Seller — prior-sale row 19, entry 1

Name: WUPEN YUEN
Street: 1001 Ridder Park Drive
City: San Jose
State / country code: CA
Postal code: 95131

Seller — prior-sale row 20, entry 1

Name: WUPEN YUEN
Street: 1001 Ridder Park Drive
City: San Jose
State / country code: CA
Postal code: 95131

Seller — prior-sale row 21, entry 1

Name: WUPEN YUEN
Street: 1001 Ridder Park Drive
City: San Jose
State / country code: CA
Postal code: 95131

Seller — prior-sale row 22, entry 1

Name: WUPEN YUEN
Street: 1001 Ridder Park Drive
City: San Jose
State / country code: CA
Postal code: 95131

Seller — prior-sale row 23, entry 1

Name: WUPEN YUEN
Street: 1001 Ridder Park Drive
City: San Jose
State / country code: CA
Postal code: 95131

Prior-sale reporting

Nothing to report for the preceding three months: N

Notice signature

Notice date: 09/23/2026
Signed: /s/ Wupen Yuen
Plan adoption dates: 05/19/2026

Company context

Lumentum (NASDAQ: LITE) is a global leader in optical and photonic technologies that power the networks and infrastructure behind AI, cloud computing, and next-generation communications. Built on decades of photonics innovation, Lumentum delivers high-performance lasers, modules, and optical subsystems that enable scalable, energy-efficient data center connectivity, advanced telecom networks, industrial manufacturing, and sensing applications. Headquartered in San Jose, California, the company operates R&D, manufacturing, and sales facilities worldwide. Learn more at www.lumentum.com.

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