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WELLINGTON MANAGEMENT GROUP LLP

Position in MKSI — Mks Inc

CIK 902219 Boston, MA

Position in MKSI

as of Jun 30, 2026 · filed Aug 14, 2026
Position Value
$629,851,920
+$208,578,710 QoQ
Shares Held
1,416,034
-22.8% QoQ
Ownership
2.09%
of shares outstanding
% of Portfolio
0.11%
of 13F equity value
Holder Rank
#13
of 773 holders
Holding Since
Mar 2020
25 quarters on record
Voting authority Sole 0% Shared 89% None 11%

Common Shares in MKSI Over Time

Shares Held

Position Value (USD)

Position in Scientific & Technical Instruments

Technology · as of Jun 30, 2026

WELLINGTON MANAGEMENT GROUP LLP holds $1,674,866,698 across 13 Scientific & Technical Instruments names. MKSI ranks #1 (37.6% of the industry book) .

# Ticker Company Shares Value (USD) Open
1 MKSI
Mks Inc
This page
1,416,034 $629,851,920

All Filings in MKSI

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25 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $629,851,920 1,416,034
2026-03-31 $421,273,210 1,833,137
2025-12-31 $407,812,954 2,552,021
2025-09-30 $373,017,404 3,013,795
2025-06-30 $298,025,745 2,999,454
2025-03-31 $260,494,309 3,250,085
2024-12-31 $239,207,386 2,291,478
2024-09-30 $248,376,583 2,284,763
2024-06-30 $462,505,477 3,541,932
2024-03-31 $447,821,507 3,367,079
2023-12-31 $265,125,821 2,577,290
2023-09-30 $233,852,626 2,702,249
2023-06-30 $295,897,048 2,737,253
2023-03-31 $150,717,095 1,700,712
2022-12-31 $160,837,704 1,898,238
2022-09-30 $205,395,851 2,485,429
2022-06-30 $322,390,282 3,141,287
2022-03-31 $696,324,300 4,642,162
2021-09-30 $706,706,096 4,682,964
2021-06-30 $867,757,869 4,876,414
2021-03-31 $989,373,120 5,335,849
2020-12-31 $760,793,151 5,056,784
2020-09-30 $520,480,074 4,764,992
2020-06-30 $539,073,582 4,760,452
2020-03-31 $379,121,404 4,654,652