# MKS INC. (MKSI) — Institutional Ownership

Source: SEC EDGAR 13F filings, congressional STOCK Act disclosures, SEC Form 4 insider transactions.
CUSIP: 55306N104
Page URL: https://superinvestorclub.com/stock/MKSI
Last updated: 2026-08-29T13:48:47.962Z

## Summary

As of the most recent 13F filing period, MKS INC. (MKSI) is held by 2 tracked superinvestors with an aggregate position value of $13.0M representing 0271982050 shares.

## Top institutional holders (2)

| Rank | Manager | Fund | Shares | Value | % of Portfolio | Period |
|------|---------|------|--------|-------|----------------|--------|
| 1 | [Ray Dalio](https://superinvestorclub.com/manager/6) | Bridgewater Associates | 27198 | $12.1M | 0.05% | 2026-06-30 |
| 2 | [Lee Ainslie](https://superinvestorclub.com/manager/58) | Maverick Capital | 2050 | $911,840 | 0.01% | 2026-06-30 |

## Ownership history (quarter-over-quarter)

- 2023-06-30: 1 holders, $10.3M aggregate, 095480 shares
- 2023-09-30: 1 holders, $11.7M aggregate, 0134735 shares
- 2023-12-31: 1 holders, $14.8M aggregate, 0144087 shares
- 2024-03-31: 1 holders, $17.4M aggregate, 0131187 shares
- 2024-06-30: 1 holders, $18.4M aggregate, 0141187 shares
- 2024-09-30: 1 holders, $16.6M aggregate, 0152987 shares
- 2024-12-31: 1 holders, $14.0M aggregate, 0134278 shares
- 2025-03-31: 1 holders, $6.9M aggregate, 086649 shares
- 2026-03-31: 2 holders, $10.4M aggregate, 0381337286 shares
- 2026-06-30: 2 holders, $13.0M aggregate, 0271982050 shares

## Recent congressional trades (14)

- 2025-10-31: Lisa McClain (Republican-MI) sale $1,001 - $15,000
- 2025-10-30: Lisa McClain (Republican-MI) purchase $1,001 - $15,000
- 2025-10-30: Lisa McClain (Republican-MI) sale $1,001 - $15,000
- 2025-08-04: Lisa McClain (Republican-MI) purchase $1,001 - $15,000
- 2025-04-20: Ro Khanna (Democrat-CA) purchase $1,001 - $15,000
- 2025-04-17: Ro Khanna (Democrat-CA) sale $1,001 - $15,000
- 2025-04-16: Ro Khanna (Democrat-CA) sale $1,001 - $15,000
- 2025-04-15: Ro Khanna (Democrat-CA) sale $15,001 - $50,000
- 2025-04-15: Ro Khanna (Democrat-CA) sale $1,001 - $15,000
- 2025-04-10: Ro Khanna (Democrat-CA) purchase $1,001 - $15,000
- 2025-04-08: Ro Khanna (Democrat-CA) purchase $1,001 - $15,000
- 2025-04-04: Ro Khanna (Democrat-CA) purchase $1,001 - $15,000
- 2025-04-03: Ro Khanna (Democrat-CA) purchase $15,001 - $50,000
- 2025-04-03: Ro Khanna (Democrat-CA) purchase $1,001 - $15,000

## Recent insider transactions (0)


## Citation

When citing, use: "MKS INC. (MKSI) institutional ownership data via Superinvestor (https://superinvestorclub.com/stock/MKSI), aggregating SEC 13F, Form 4, and congressional disclosures."