SOBERS SEAN (Chief Financial Officer) sold 6.5% of their position (44.56K shares) of THREDUP INC. on the open market

Open‑market sale worth $115.0K — a moderate reduction. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 3 sales

SOBERS SEAN

Filed: 9/2/2026ACC: 0001628280-26-060219

InsiderSOBERS SEANCIK 1688472

→

IssuerTHREDUP INC.CIK 1484778

Officer· Chief Financial Officer

Since Mar 2021

-44.56K

Net shares

Net seller

$115.0K

Total sold

Open market trades

0B · 3S

Total transactions

86.11K acquired · 130.67K disposed

Non-Derivative Transactions6

Class A Common Stock

Direct

M · Option Exercise

+36.67K

Price / share

—

Trade value

—

% of position

6.2%

9/1/2026

595.81K→632.48K

Class A Common Stock

Direct

M · Option Exercise

+25.83K

Price / share

—

Trade value

—

% of position

4.2%

9/1/2026

613.50K→639.34K

Class A Common Stock

Direct

M · Option Exercise

+23.61K

Price / share

—

Trade value

—

% of position

3.8%

9/1/2026

625.97K→649.58K

Class A Common Stock

Direct

S · Sale

−18.97K

Price / share

$2.58

Trade value

$48.97K

% of position

3.0%

9/2/2026

632.48K→613.50K

Class A Common Stock

Direct

S · Sale

−13.37K

Price / share

$2.58

Trade value

$34.51K

% of position

2.1%

9/2/2026

639.34K→625.97K

Class A Common Stock

Direct

S · Sale

−12.22K

Price / share

$2.58

Trade value

$31.54K

% of position

1.9%

9/2/2026

649.58K→637.36K

Total

Net shares

+41.55K

Net value

-$115.02K

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Class A Common Stock Direct	9/1/2026	M · Option Exercise	+36.67K	—	—	6.2%	595.81K	632.48K
Class A Common Stock Direct	9/1/2026	M · Option Exercise	+25.83K	—	—	4.2%	613.50K	639.34K
Class A Common Stock Direct	9/1/2026	M · Option Exercise	+23.61K	—	—	3.8%	625.97K	649.58K
Class A Common Stock Direct	9/2/2026	S · Sale	−18.97K	$2.58	$48.97K	3.0%	632.48K	613.50K
Class A Common Stock Direct	9/2/2026	S · Sale	−13.37K	$2.58	$34.51K	2.1%	639.34K	625.97K
Class A Common Stock Direct	9/2/2026	S · Sale	−12.22K	$2.58	$31.54K	1.9%	649.58K	637.36K
Total			+41.55K		-$115.02K

Derivative Transactions3

Restricted Stock Units

Direct

M · Option Exercise

Converts to

Class A Common Stock

36.67K shares

−36.67K

Strike price

Held after

427.76K

Exercisable

—

9/1/2026

Restricted Stock Units

Direct

M · Option Exercise

Converts to

Class A Common Stock

25.83K shares

−25.83K

Strike price

Held after

401.93K

Exercisable

—

9/1/2026

Restricted Stock Units

Direct

M · Option Exercise

Converts to

Class A Common Stock

23.61K shares

−23.61K

Strike price

Held after

378.32K

Exercisable

—

9/1/2026

Security	Converts To	Date	Type	Shares	Exercisable	Held After
Restricted Stock Units Direct	Class A Common Stock36.67K shares	9/1/2026	M · Option Exercise	−36.67K	—	427.76K
Restricted Stock Units Direct	Class A Common Stock25.83K shares	9/1/2026	M · Option Exercise	−25.83K	—	401.93K
Restricted Stock Units Direct	Class A Common Stock23.61K shares	9/1/2026	M · Option Exercise	−23.61K	—	378.32K