PROPST DEBBIE F (President - HM Consumer) received a stock award from MILLERKNOLL, INC.

Compensation award — not an open‑market transaction. Less informative as a directional signal.

A · 3 awards

PROPST DEBBIE F

Filed: 8/3/2026ACC: 0001797945-26-000006

InsiderPROPST DEBBIE FCIK 1797945

→

IssuerMILLERKNOLL, INC.CIK 66382

Officer· President - HM Consumer

Since Jan 2020

+928.59

Net shares

Net buyer

$251.5K

Total sold

Open market trades

0B · 0S

Total transactions

22.88K acquired · 21.95K disposed

Non-Derivative Transactions8

Common Stock

Direct

M · Option Exercise

+10.78K

Price / share

—

Trade value

—

% of position

17.5%

8/1/2026

61.73K→72.51K

Common Stock

Direct

F · Tax Withholding

−5.56K

Price / share

$22.52

Trade value

$125.25K

% of position

7.7%

8/1/2026

72.51K→66.95K

Common Stock

Direct

A · Award

+5.36K

Price / share

—

Trade value

—

% of position

8.0%

8/1/2026

66.95K→72.30K

Common Stock

Direct

F · Tax Withholding

−2.48K

Price / share

$22.52

Trade value

$55.88K

% of position

3.4%

8/1/2026

72.30K→69.82K

Common Stock

Direct

A · Award

+2.15K

Price / share

—

Trade value

—

% of position

3.1%

8/1/2026

69.82K→71.97K

Common Stock

Direct

F · Tax Withholding

−995.38

Price / share

$22.52

Trade value

$22.42K

% of position

1.4%

8/1/2026

71.97K→70.98K

Common Stock

Direct

A · Award

+4.59K

Price / share

—

Trade value

—

% of position

6.5%

8/1/2026

70.98K→75.57K

Common Stock

Direct

F · Tax Withholding

−2.13K

Price / share

$22.52

Trade value

$47.92K

% of position

2.8%

8/1/2026

75.57K→73.44K

Total

Net shares

+11.71K

Net value

-$251.47K

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Common Stock Direct	8/1/2026	M · Option Exercise	+10.78K	—	—	17.5%	61.73K	72.51K
Common Stock Direct	8/1/2026	F · Tax Withholding	−5.56K	$22.52	$125.25K	7.7%	72.51K	66.95K
Common Stock Direct	8/1/2026	A · Award	+5.36K	—	—	8.0%	66.95K	72.30K
Common Stock Direct	8/1/2026	F · Tax Withholding	−2.48K	$22.52	$55.88K	3.4%	72.30K	69.82K
Common Stock Direct	8/1/2026	A · Award	+2.15K	—	—	3.1%	69.82K	71.97K
Common Stock Direct	8/1/2026	F · Tax Withholding	−995.38	$22.52	$22.42K	1.4%	71.97K	70.98K
Common Stock Direct	8/1/2026	A · Award	+4.59K	—	—	6.5%	70.98K	75.57K
Common Stock Direct	8/1/2026	F · Tax Withholding	−2.13K	$22.52	$47.92K	2.8%	75.57K	73.44K
Total			+11.71K		-$251.47K

Derivative Transactions1

Restricted Stock Units

Direct

M · Option Exercise

Converts to

Common Stock

10.78K shares

−10.78K

Strike price

Held after

66.60K

Exercisable

—

8/1/2026

Security	Converts To	Date	Type	Shares	Strike Price	Exercisable	Held After
Restricted Stock Units Direct	Common Stock10.78K shares	8/1/2026	M · Option Exercise	−10.78K		—	66.60K