GAMCO INVESTORS, INC. ET AL

Position in MKSI — Mks Inc

CIK 807249 GREENWICH, CT

Position in MKSI

as of Jun 30, 2026 · filed Aug 12, 2026 Compact

Position Value

$318,032

-$572,481 QoQ

Shares Held

715

-81.5% QoQ

Ownership

0.001%

of shares outstanding

% of Portfolio

0.00%

of 13F equity value

Holder Rank

#563

of 773 holders

Holding Since

Sep 2024

8 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Technology · as of Jun 30, 2026

GAMCO INVESTORS, INC. ET AL holds $26,664,570 across 6 Scientific & Technical Instruments names. MKSI ranks #6 (1.2% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	BMI	Badger Meter Inc	96,725	$14,352,055
2	LGL	Lgl Group Inc	670,781	$4,635,096
3	ITRI	Itron, Inc.	50,000	$4,326,500
4	KEYS	Keysight Technologies, Inc.	6,292	$2,202,640
5	MLAB	Mesa Laboratories Inc /Co/	8,340	$830,247
6	MKSI	Mks Inc This page	715	$318,032

8 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$318,032	715	-81.5%	Shares	Sole	2026-08-12
2026-03-31	$890,513	3,875	-0.3%	Shares	Sole	2026-05-14
2025-12-31	$620,823	3,885	-50.7%	Shares	Sole	2026-02-05
2025-09-30	$975,926	7,885	-7.1%	Shares	Sole	2025-11-12
2025-06-30	$843,069	8,485	-0.7%	Shares	Sole	2025-08-13
2025-03-31	$684,881	8,545	+110.5%	Shares	Sole	2025-05-14
2024-12-31	$423,823	4,060	+37.2%	Shares	Sole	2025-02-13
2024-09-30	$321,781	2,960	—	Shares	Sole	2024-11-14
No filing history on record for this holder in this stock.