Director/PDMR Shareholding

1

Details of the person discharging managerial responsibilities / person closely associated

a)

Name

Irial Finan

2

Reason for the notification

a)

Position/status

Chair/Non-executive Director

b)

Initial notification /Amendment

Initial Notification

3

Details of the issuer, emission allowance market participant, auction platform, auctioneer or auction monitor

a)

Name

Smurfit Westrock plc

b)

LEI

635400EGSEOPDW2EXS14

4

Details of the transaction(s): section to be repeated for (i) each type of instrument; (ii) each type of transaction; (iii) each date; and (iv) each place where transactions have been conducted

a)

Description of the financial instrument, type of instrument

Ordinary Shares of $0.001 each

Identification code

IE00028FXN24

b)

Nature of the transaction

1. Vesting of the annual 2025 RSU Conditional Award granted under the Smurfit Westrock 2024 Long-Term Incentive Plan settled on a net settlement basis

2. Grant of the 2026 RSU Conditional Award under the Smurfit Westrock 2024 Long-Term Incentive Plan

c)

Price(s) and volume(s)

Price(s)

Volume(s)

1. Nil

3,613

2. Nil

6,974

d)

Aggregated information

N/A

- Aggregated volume

- Price

e)

Date of the transaction

01 May 2026

f)

Place of the transaction

N/A (Outside a trading venue)

g)

Additional Information

1. Shares are being delivered on a net settlement basis

Net settlement price was $38.39

1

Details of the person discharging managerial responsibilities / person closely associated

a)

Name

Colleen F. Arnold

2

Reason for the notification

a)

Position/status

Non-executive Director

b)

Initial notification /Amendment

Initial Notification

3

Details of the issuer, emission allowance market participant, auction platform, auctioneer or auction monitor

a)

Name

Smurfit Westrock plc

b)

LEI

635400EGSEOPDW2EXS14

4

Details of the transaction(s): section to be repeated for (i) each type of instrument; (ii) each type of transaction; (iii) each date; and (iv) each place where transactions have been conducted

a)

Description of the financial instrument, type of instrument

Ordinary Shares of $0.001 each

Identification code

IE00028FXN24

b)

Nature of the transaction

1. Vesting of the annual 2025 RSU Conditional Award granted under the Smurfit Westrock 2024 Long-Term Incentive Plan settled on a net settlement basis

2. Grant of the 2026 RSU Conditional Award under the Smurfit Westrock 2024 Long-Term Incentive Plan

c)

Price(s) and volume(s)

Price(s)

Volume(s)

1. Nil

2,299

2. Nil

4,438

d)

Aggregated information

N/A

- Aggregated volume

- Price

e)

Date of the transaction

01 May 2026

f)

Place of the transaction

N/A (Outside a trading venue)

g)

Additional Information

1. Shares are being delivered on a net settlement basis

Net settlement price was $38.39

1

Details of the person discharging managerial responsibilities / person closely associated

a)

Name

Timothy J. Bernlohr

2

Reason for the notification

a)

Position/status

Non-executive Director

b)

Initial notification /Amendment

Initial Notification

3

Details of the issuer, emission allowance market participant, auction platform, auctioneer or auction monitor

a)

Name

Smurfit Westrock plc

b)

LEI

635400EGSEOPDW2EXS14

4

Details of the transaction(s): section to be repeated for (i) each type of instrument; (ii) each type of transaction; (iii) each date; and (iv) each place where transactions have been conducted

a)

Description of the financial instrument, type of instrument

Ordinary Shares of $0.001 each

Identification code

IE00028FXN24

b)

Nature of the transaction

1. Vesting of the annual 2025 RSU Conditional Award granted under the Smurfit Westrock 2024 Long-Term Incentive Plan settled on a net settlement basis

2. Grant of the 2026 RSU Conditional Award under the Smurfit Westrock 2024 Long-Term Incentive Plan

c)

Price(s) and volume(s)

Price(s)

Volume(s)

1. Nil

2,299

2. Nil

4,438

d)

Aggregated information

N/A

- Aggregated volume

- Price

e)

Date of the transaction

01 May 2026

f)

Place of the transaction

N/A (Outside a trading venue)

g)

Additional Information

1. Shares are being delivered on a net settlement basis

Net settlement price was $38.39

1

Details of the person discharging managerial responsibilities / person closely associated

a)

Name

Terrell K. Crews

2

Reason for the notification

a)

Position/status

Non-executive Director

b)

Initial notification /Amendment

Initial Notification

3

Details of the issuer, emission allowance market participant, auction platform, auctioneer or auction monitor

a)

Name

Smurfit Westrock plc

b)

LEI

635400EGSEOPDW2EXS14

4

Details of the transaction(s): section to be repeated for (i) each type of instrument; (ii) each type of transaction; (iii) each date; and (iv) each place where transactions have been conducted

a)

Description of the financial instrument, type of instrument

Ordinary Shares of $0.001 each

Identification code

IE00028FXN24

b)

Nature of the transaction

1. Vesting of the annual 2025 RSU Conditional Award granted under the Smurfit Westrock 2024 Long-Term Incentive Plan settled on a net settlement basis

c)

Price(s) and volume(s)

Price(s)

Volume(s)

1. Nil

2,299

d)

Aggregated information

N/A

- Aggregated volume

- Price

e)

Date of the transaction

01 May 2026

f)

Place of the transaction

N/A (Outside a trading venue)

g)

Additional Information

1. Shares are being delivered on a net settlement basis

Net settlement price was $38.39

1

Details of the person discharging managerial responsibilities / person closely associated

a)

Name

Suzan F. Harrison

2

Reason for the notification

a)

Position/status

Non-executive Director

b)

Initial notification /Amendment

Initial Notification

3

Details of the issuer, emission allowance market participant, auction platform, auctioneer or auction monitor

a)

Name

Smurfit Westrock plc

b)

LEI

635400EGSEOPDW2EXS14

4

Details of the transaction(s): section to be repeated for (i) each type of instrument; (ii) each type of transaction; (iii) each date; and (iv) each place where transactions have been conducted

a)

Description of the financial instrument, type of instrument

Ordinary Shares of $0.001 each

Identification code

IE00028FXN24

b)

Nature of the transaction

1. Vesting of the annual 2025 RSU Conditional Award granted under the Smurfit Westrock 2024 Long-Term Incentive Plan settled on a net settlement basis

2. Grant of the 2026 RSU Conditional Award under the Smurfit Westrock 2024 Long-Term Incentive Plan

c)

Price(s) and volume(s)

Price(s)

Volume(s)

1. Nil

2,299

2. Nil

4,438

d)

Aggregated information

N/A

- Aggregated volume

- Price

e)

Date of the transaction

01 May 2026

f)

Place of the transaction

N/A (Outside a trading venue)

g)

Additional Information

1. Shares are being delivered on a net settlement basis

Net settlement price was $38.39

1

Details of the person discharging managerial responsibilities / person closely associated

a)

Name

Alan D. Wilson

2

Reason for the notification

a)

Position/status

Non-executive Director

b)

Initial notification /Amendment

Initial Notification

3

Details of the issuer, emission allowance market participant, auction platform, auctioneer or auction monitor

a)

Name

Smurfit Westrock plc

b)

LEI

635400EGSEOPDW2EXS14

4

Details of the transaction(s): section to be repeated for (i) each type of instrument; (ii) each type of transaction; (iii) each date; and (iv) each place where transactions have been conducted

a)

Description of the financial instrument, type of instrument

Ordinary Shares of $0.001 each

Identification code

IE00028FXN24

b)

Nature of the transaction

1. Vesting of the annual 2025 RSU Conditional Award granted under the Smurfit Westrock 2024 Long-Term Incentive Plan settled on a net settlement basis

2. Grant of the 2026 RSU Conditional Award under the Smurfit Westrock 2024 Long-Term Incentive Plan

c)

Price(s) and volume(s)

Price(s)

Volume(s)

1. Nil

2,299

2. Nil

4,438

d)

Aggregated information

N/A

- Aggregated volume

- Price

e)

Date of the transaction

01 May 2026

f)

Place of the transaction

N/A (Outside a trading venue)

g)

Additional Information

1. Shares are being delivered on a net settlement basis

Net settlement price was $38.39

1

Details of the person discharging managerial responsibilities / person closely associated

a)

Name

Jørgen Buhl Rasmussen

2

Reason for the notification

a)

Position/status

Non-executive Director

b)

Initial notification /Amendment

Initial Notification

3

Details of the issuer, emission allowance market participant, auction platform, auctioneer or auction monitor

a)

Name

Smurfit Westrock plc

b)

LEI

635400EGSEOPDW2EXS14

4

Details of the transaction(s): section to be repeated for (i) each type of instrument; (ii) each type of transaction; (iii) each date; and (iv) each place where transactions have been conducted

a)

Description of the financial instrument, type of instrument

Ordinary Shares of $0.001 each

Identification code

IE00028FXN24

b)

Nature of the transaction

1. Vesting of the annual 2025 RSU Conditional Award granted under the Smurfit Westrock 2024 Long-Term Incentive Plan settled on a net settlement basis

2. Grant of the 2026 RSU Conditional Award under the Smurfit Westrock 2024 Long-Term Incentive Plan

c)

Price(s) and volume(s)

Price(s)

Volume(s)

1. Nil

2,299

2. Nil

4,438

d)

Aggregated information

N/A

- Aggregated volume

- Price

e)

Date of the transaction

01 May 2026

f)

Place of the transaction

N/A (Outside a trading venue)

g)

Additional Information

1. Shares are being delivered on a net settlement basis

Net settlement price was $38.39

1

Details of the person discharging managerial responsibilities / person closely associated

a)

Name

Mary Lynn Ferguson-McHugh

2

Reason for the notification

a)

Position/status

Non-executive Director

b)

Initial notification /Amendment

Initial Notification

3

Details of the issuer, emission allowance market participant, auction platform, auctioneer or auction monitor

a)

Name

Smurfit Westrock plc

b)

LEI

635400EGSEOPDW2EXS14

4

Details of the transaction(s): section to be repeated for (i) each type of instrument; (ii) each type of transaction; (iii) each date; and (iv) each place where transactions have been conducted

a)

Description of the financial instrument, type of instrument

Ordinary Shares of $0.001 each

Identification code

IE00028FXN24

b)

Nature of the transaction

1. Vesting of the annual 2025 RSU Conditional Award granted under the Smurfit Westrock 2024 Long-Term Incentive Plan settled on a net settlement basis

2. Grant of the 2026 RSU Conditional Award under the Smurfit Westrock 2024 Long-Term Incentive Plan

c)

Price(s) and volume(s)

Price(s)

Volume(s)

1. Nil

2,299

2. Nil

4,438

d)

Aggregated information

N/A

- Aggregated volume

- Price

e)

Date of the transaction

01 May 2026

f)

Place of the transaction

N/A (Outside a trading venue)

g)

Additional Information

1. Shares are being delivered on a net settlement basis

Net settlement price was $38.39

1

Details of the person discharging managerial responsibilities / person closely associated

a)

Name

Lourdes Melgar

2

Reason for the notification

a)

Position/status

Non-executive Director

b)

Initial notification /Amendment

Initial Notification

3

Details of the issuer, emission allowance market participant, auction platform, auctioneer or auction monitor

a)

Name

Smurfit Westrock plc

b)

LEI

635400EGSEOPDW2EXS14

4

Details of the transaction(s): section to be repeated for (i) each type of instrument; (ii) each type of transaction; (iii) each date; and (iv) each place where transactions have been conducted

a)

Description of the financial instrument, type of instrument

Ordinary Shares of $0.001 each

Identification code

IE00028FXN24

b)

Nature of the transaction

1. Vesting of the annual 2025 RSU Conditional Award granted under the Smurfit Westrock 2024 Long-Term Incentive Plan settled on a net settlement basis

c)

Price(s) and volume(s)

Price(s)

Volume(s)

1. Nil

2,299

d)

Aggregated information

N/A

- Aggregated volume

- Price

e)

Date of the transaction

01 May 2026

f)

Place of the transaction

N/A (Outside a trading venue)

g)

Additional Information

1. Shares are being delivered on a net settlement basis

Net settlement price was $38.39

1

Details of the person discharging managerial responsibilities / person closely associated

a)

Name

Kaisa Hietala

2

Reason for the notification

a)

Position/status

Non-executive Director

b)

Initial notification /Amendment

Initial Notification

3

Details of the issuer, emission allowance market participant, auction platform, auctioneer or auction monitor

a)

Name

Smurfit Westrock plc

b)

LEI

635400EGSEOPDW2EXS14

4

Details of the transaction(s): section to be repeated for (i) each type of instrument; (ii) each type of transaction; (iii) each date; and (iv) each place where transactions have been conducted

a)

Description of the financial instrument, type of instrument

Ordinary Shares of $0.001 each

Identification code

IE00028FXN24

b)

Nature of the transaction

1. Vesting of the annual 2025 RSU Conditional Award granted under the Smurfit Westrock 2024 Long-Term Incentive Plan settled on a net settlement basis

2. Grant of the 2026 RSU Conditional Award under the Smurfit Westrock 2024 Long-Term Incentive Plan

c)

Price(s) and volume(s)

Price(s)

Volume(s)

1. Nil

2,299

2. Nil

4,438

d)

Aggregated information

N/A

- Aggregated volume

- Price

e)

Date of the transaction

01 May 2026

f)

Place of the transaction

N/A (Outside a trading venue)

g)

Additional Information

1. Shares are being delivered on a net settlement basis

Net settlement price was $38.39

1

Details of the person discharging managerial responsibilities / person closely associated

a)

Name

Carol Fairweather

2

Reason for the notification

a)

Position/status

Non-executive Director

b)

Initial notification /Amendment

Initial Notification

3

Details of the issuer, emission allowance market participant, auction platform, auctioneer or auction monitor

a)

Name

Smurfit Westrock plc

b)

LEI

635400EGSEOPDW2EXS14

4

Details of the transaction(s): section to be repeated for (i) each type of instrument; (ii) each type of transaction; (iii) each date; and (iv) each place where transactions have been conducted

a)

Description of the financial instrument, type of instrument

Ordinary Shares of $0.001 each

Identification code

IE00028FXN24

b)

Nature of the transaction

1. Vesting of the annual 2025 RSU Conditional Award granted under the Smurfit Westrock 2024 Long-Term Incentive Plan settled on a net settlement basis

2. Grant of the 2026 RSU Conditional Award under the Smurfit Westrock 2024 Long-Term Incentive Plan

c)

Price(s) and volume(s)

Price(s)

Volume(s)

1. Nil

2,299

2. Nil

4,438

d)

Aggregated information

N/A

- Aggregated volume

- Price

e)

Date of the transaction

01 May 2026

f)

Place of the transaction

N/A (Outside a trading venue)

g)

Additional Information

1. Shares are being delivered on a net settlement basis

Net settlement price was $38.39

1

Details of the person discharging managerial responsibilities / person closely associated

a)

Name

Carole L. Brown

2

Reason for the notification

a)

Position/status

Non-executive Director

b)

Initial notification /Amendment

Initial Notification

3

Details of the issuer, emission allowance market participant, auction platform, auctioneer or auction monitor

a)

Name

Smurfit Westrock plc

b)

LEI

635400EGSEOPDW2EXS14

4

Details of the transaction(s): section to be repeated for (i) each type of instrument; (ii) each type of transaction; (iii) each date; and (iv) each place where transactions have been conducted

a)

Description of the financial instrument, type of instrument

Ordinary Shares of $0.001 each

Identification code

IE00028FXN24

b)

Nature of the transaction

1. Vesting of the annual 2025 RSU Conditional Award granted under the Smurfit Westrock 2024 Long-Term Incentive Plan settled on a net settlement basis

2. Grant of the 2026 RSU Conditional Award under the Smurfit Westrock 2024 Long-Term Incentive Plan

c)

Price(s) and volume(s)

Price(s)

Volume(s)

1. Nil

2,299

2. Nil

4,438

d)

Aggregated information

N/A

- Aggregated volume

- Price

e)

Date of the transaction

01 May 2026

f)

Place of the transaction

N/A (Outside a trading venue)

g)

Additional Information

1. Shares are being delivered on a net settlement basis

Net settlement price was $38.39