HSING MICHAEL (CEO) sold 3.4% of their position (34K shares) of MONOLITHIC POWER SYSTEMS INC on the open market

Open‑market sale worth $38.84M — a minor trim. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 9 sales

HSING MICHAEL

Filed: 2/12/2026ACC: 0001214659-26-001587

InsiderHSING MICHAELCIK 1308676

→

IssuerMONOLITHIC POWER SYSTEMS INCCIK 1280452

DirectorOfficer· CEO

Since Jul 2018

-34K

Net shares

Net seller

$38.84M

Total sold

Open market trades

0B · 9S

Total transactions

34K disposed

Non-Derivative Transactions9

Common Stock

Direct

S · Sale

−4.30K

Price / share

$1.13K

Trade value

$4.87M

% of position

0.4%

2/10/2026

988.23K→983.93K

Common Stock

Direct

S · Sale

−6.33K

Price / share

$1.14K

Trade value

$7.19M

% of position

0.6%

2/10/2026

983.93K→977.61K

Common Stock

Direct

S · Sale

−16.08K

Price / share

$1.14K

Trade value

$18.36M

% of position

1.6%

2/10/2026

977.61K→961.53K

Common Stock

Direct

S · Sale

−3.86K

Price / share

$1.15K

Trade value

$4.43M

% of position

0.4%

2/10/2026

961.53K→957.66K

Common Stock

Direct

S · Sale

−1.22K

Price / share

$1.15K

Trade value

$1.40M

% of position

0.1%

2/10/2026

957.66K→956.45K

Common Stock

Direct

S · Sale

−694.00

Price / share

$1.15K

Trade value

$801.54K

% of position

0.1%

2/10/2026

956.45K→955.75K

Common Stock

Direct

S · Sale

−360.00

Price / share

$1.16K

Trade value

$418.11K

% of position

0.0%

2/10/2026

955.75K→955.39K

Common Stock

Direct

S · Sale

−880.00

Price / share

$1.18K

Trade value

$1.03M

% of position

0.1%

2/10/2026

955.39K→954.51K

Common Stock

Direct

S · Sale

−280.00

Price / share

$1.20K

Trade value

$335.23K

% of position

0.0%

2/10/2026

954.51K→954.23K

Total

Net shares

−34K

Net value

-$38.84M

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Common Stock Direct	2/10/2026	S · Sale	−4.30K	$1.13K	$4.87M	0.4%	988.23K	983.93K
Common Stock Direct	2/10/2026	S · Sale	−6.33K	$1.14K	$7.19M	0.6%	983.93K	977.61K
Common Stock Direct	2/10/2026	S · Sale	−16.08K	$1.14K	$18.36M	1.6%	977.61K	961.53K
Common Stock Direct	2/10/2026	S · Sale	−3.86K	$1.15K	$4.43M	0.4%	961.53K	957.66K
Common Stock Direct	2/10/2026	S · Sale	−1.22K	$1.15K	$1.40M	0.1%	957.66K	956.45K
Common Stock Direct	2/10/2026	S · Sale	−694.00	$1.15K	$801.54K	0.1%	956.45K	955.75K
Common Stock Direct	2/10/2026	S · Sale	−360.00	$1.16K	$418.11K	0.0%	955.75K	955.39K
Common Stock Direct	2/10/2026	S · Sale	−880.00	$1.18K	$1.03M	0.1%	955.39K	954.51K
Common Stock Direct	2/10/2026	S · Sale	−280.00	$1.20K	$335.23K	0.0%	954.51K	954.23K
Total			−34K		-$38.84M

Derivative Transactions0

No derivative transactions reported

Non-Derivative Holdings (Post-Transaction)2

Common Stock

Indirect

Shares owned133.04K

Common Stock

Indirect

Shares owned12.82K

Total

145.87K indirect145.87K

Security Title	Shares Owned	Ownership Type
Common Stock	133.04K	Indirect
Common Stock	12.82K	Indirect
Total	145.87K	145.87K indirect

Derivative Holdings (Post-Transaction)0

No derivative holdings reported