GOINS MELANIE F (General Counsel and Secretary) sold 5.0% of their position (11.30K shares) of 1STDIBS.COM, INC. on the open market

Open‑market sale worth $67.3K — a moderate reduction. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 1 sale

GOINS MELANIE F

Filed: 12/10/2025ACC: 0001775877-25-000003

InsiderGOINS MELANIE FCIK 1775877

→

Issuer1STDIBS.COM, INC.CIK 1600641

Officer· General Counsel and Secretary

Since Jun 2021

-11.30K

Net shares

Net seller

$67.3K

Total sold

Open market trades

0B · 1S

Total transactions

33.19K acquired · 44.49K disposed

Non-Derivative Transactions5

Common Stock

Direct

M · Option Exercise

+5.33K

Price / share

—

Trade value

—

% of position

2.8%

12/8/2025

191.17K→196.50K

Common Stock

Direct

M · Option Exercise

+8.83K

Price / share

—

Trade value

—

% of position

4.5%

12/8/2025

196.50K→205.33K

Common Stock

Direct

M · Option Exercise

+8.99K

Price / share

—

Trade value

—

% of position

4.4%

12/8/2025

205.33K→214.32K

Common Stock

Direct

M · Option Exercise

+10.04K

Price / share

—

Trade value

—

% of position

4.7%

12/8/2025

214.32K→224.36K

Common Stock

Direct

S · Sale

−11.30K

Price / share

$5.96

Trade value

$67.32K

% of position

5.0%

12/8/2025

224.36K→213.07K

Total

Net shares

+21.90K

Net value

-$67.32K

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Common Stock Direct	12/8/2025	M · Option Exercise	+5.33K	—	—	2.8%	191.17K	196.50K
Common Stock Direct	12/8/2025	M · Option Exercise	+8.83K	—	—	4.5%	196.50K	205.33K
Common Stock Direct	12/8/2025	M · Option Exercise	+8.99K	—	—	4.4%	205.33K	214.32K
Common Stock Direct	12/8/2025	M · Option Exercise	+10.04K	—	—	4.7%	214.32K	224.36K
Common Stock Direct	12/8/2025	S · Sale	−11.30K	$5.96	$67.32K	5.0%	224.36K	213.07K
Total			+21.90K		-$67.32K

Derivative Transactions4

Restricted Stock Units

Direct

M · Option Exercise

Converts to

Common Stock

5.33K shares

−5.33K

Strike price

Held after

5.33K

Exercisable

—

12/8/2025

Restricted Stock Units

Direct

M · Option Exercise

Converts to

Common Stock

8.83K shares

−8.83K

Strike price

Held after

8.83K

Exercisable

—

12/8/2025

Restricted Stock Units

Direct

M · Option Exercise

Converts to

Common Stock

8.99K shares

−8.99K

Strike price

Held after

44.95K

Exercisable

—

12/8/2025

Restricted Stock Units

Direct

M · Option Exercise

Converts to

Common Stock

10.04K shares

−10.04K

Strike price

Held after

90.38K

Exercisable

—

12/8/2025

Security	Converts To	Date	Type	Shares	Exercisable	Held After
Restricted Stock Units Direct	Common Stock5.33K shares	12/8/2025	M · Option Exercise	−5.33K	—	5.33K
Restricted Stock Units Direct	Common Stock8.83K shares	12/8/2025	M · Option Exercise	−8.83K	—	8.83K
Restricted Stock Units Direct	Common Stock8.99K shares	12/8/2025	M · Option Exercise	−8.99K	—	44.95K
Restricted Stock Units Direct	Common Stock10.04K shares	12/8/2025	M · Option Exercise	−10.04K	—	90.38K