MKSI — MKS INCToday's name, from the SEC's present-day ticker list — a present-day mapping, not the name as of each filing.

Congress trades
7
all time
Members · 12m
1
1 buys · 2 sells · by trade date
Latest filing
11-21
2025-11-21
Rows filed past the STOCK Act's 45-day window, stated on the row, never editorialised; both dates and the receipt stay on every row.
0
every row filed inside 45 days
13F holders
500
all listed · 2026-03-31
Congress: statutory ranges, filed up to 45 days after the trade · 13F: quarter-end snapshots, filed up to 45 days lateras of 2026-10-29
Congress 7Institutional 500

Congress · disclosure timeline

By trade date · 24 months · 4 rows ▲ buy, ▼ sell; height = lower bound (log scale). Trade date, not filing date — the filing lag is in the table below.

4 dated disclosures in the window, placed by trade date; magnitudes are the disclosed lower bounds, against gridlines at $15K, $250K, $5M.

Members active in MKSI

12 months · most active first Rows = number of disclosures, not dollars. Net = lower bound of the net range. Committees as of each member's latest trade in the window (roster snapshot 2026-10-29).
Members disclosing MKSI in the trailing 12 months
MemberRowsNet disclosed flow for this ticker: purchases minus sales, computed as a net range on the disclosed amounts. A lower bound is provable, never a point.Number of committees the member sat on as of their latest trade date in the window, from the cc0-legislators roster snapshot. Context, never an allegation; jurisdiction overlap needs the sector join.
Lisa C. McClain R–MI-93−$29.0K to $13.0K2

1 member

Congressional disclosures

Newest filed firstAll 7 rows ↗
Latest congressional filings mentioning MKSI
FiledMemberSide · OwnerTraded · LagAmountRange · FlagsSrc
2025-11-21Lisa C. McClain R–MI-9SELL SP (spouse-owned)Traded 10-31 +21d$1K–$15K
2025-11-21Lisa C. McClain R–MI-9BUY SP (spouse-owned)Traded 10-30 +22d$1K–$15K
2025-11-21Lisa C. McClain R–MI-9SELL SP (spouse-owned)Traded 10-30 +22d$1K–$15K
2025-09-12Lisa C. McClain R–MI-9BUY SP (spouse-owned)Traded 08-04 +39d$1K–$15K
2023-05-12Tommy Tuberville R–ALSELL JT (jointly owned)Traded 04-03 +39d$1K–$15Kamendment pending
2022-04-08Tommy Tuberville R–ALBUY JT (jointly owned)Traded 03-30 +9d$1K–$15K
2019-04-15Van Taylor R–TX-3SELL SP (spouse-owned)Traded 03-25 +21d$1K–$15K

13F holders · Quarter ended 2026-03-31Newest filing in this build: 2026-07-31. Per-row filing dates are on each receipt. · longs only

Top institutional holders of MKSI for quarter 2026-03-31, 1–25 of 500 holders
#FilerValueSecuritiesFlagsderived by Public Filings from this build's reviewed ticker-mapping holders list for this share class; that list carries each holder's share count, share change and filed date, which this table does not show, but no document links — the EDGAR link opens the filer's 13F list·§
1BlackRock, Inc.$1.5B1
derived ·§ EDGAR ↗
2Invesco Ltd.$855M1
derived ·§ EDGAR ↗
3VANGUARD PORTFOLIO MANAGEMENT LLC$847M1
derived ·§ EDGAR ↗
4VANGUARD CAPITAL MANAGEMENT LLC$693M1
derived ·§ EDGAR ↗
5STATE STREET CORP$473M1
derived ·§ EDGAR ↗
6Capital International Investors$452M1
derived ·§ EDGAR ↗
7FMR LLC$444M1
derived ·§ EDGAR ↗
8WELLINGTON MANAGEMENT GROUP LLP$421M1
derived ·§ EDGAR ↗
9Point72 Asset Management, L.P.$370M1
derived ·§ EDGAR ↗
10GEODE CAPITAL MANAGEMENT, LLC$354M1
derived ·§ EDGAR ↗
11Whale Rock Capital Management LLC$300M1
derived ·§ EDGAR ↗
12Capital World Investors$294M1
derived ·§ EDGAR ↗
13WESTFIELD CAPITAL MANAGEMENT CO LP$241M1
derived ·§ EDGAR ↗
14CITADEL ADVISORS LLC$218M1
derived ·§ EDGAR ↗
15MILLENNIUM MANAGEMENT LLC$206M1
derived ·§ EDGAR ↗
16VICTORY CAPITAL MANAGEMENT INC$202M1
derived ·§ EDGAR ↗
17CHARLES SCHWAB INVESTMENT MANAGEMENT INC$199M1
derived ·§ EDGAR ↗
18DIMENSIONAL FUND ADVISORS LP$192M1
derived ·§ EDGAR ↗
19Bank of New York Mellon Corp$191M1
derived ·§ EDGAR ↗
20PRINCIPAL FINANCIAL GROUP INC$141M1
derived ·§ EDGAR ↗
21AQR CAPITAL MANAGEMENT LLC$137M1
derived ·§ EDGAR ↗
22NORTHERN TRUST CORP$131M1
derived ·§ EDGAR ↗
23MORGAN STANLEY$118M1
derived ·§ EDGAR ↗
24SAMLYN CAPITAL, LLC$114M1
derived ·§ EDGAR ↗
25FRANKLIN RESOURCES INC$109M1
derived ·§ EDGAR ↗
Show all 500 holders
Truncated by Public Filings. All 479 13F filers reporting this share class are listed. Method ↗

Crowding — not available in this build. No holder rows for the selected period, so no percentile can be ranked.

Congress ↔ notable managers · MKSI

Congress · last 90 days

Buyers
0 — —
Sellers
0 — —

filed 2026-07-31 → 2026-10-29 · statutory ranges

Notable managers · quarter ended 2026-03-31

by shares · $ = value heldNEW + ADD vs TRIM + EXIT, by share count. $ = reported value now, not the change. · MKS INC.

Merged timeline of congressional filings and notable-manager moves on MKSI
DateWhoChangeSize
2026-05-15Bridgewater Associates 13FNEW+38,133 sh
2026-05-15Moore Capital Management 13FNEW+10,000 sh
2026-05-15Gotham Asset Management 13FTRIM−29,812 sh
2026-05-15Tudor Investment Corp 13FTRIM−23,202 sh
2026-05-15Glenview Capital 13FEXIT−74,200 sh
2026-05-14Caxton Associates 13FADD+206 sh

6 newest, by filing date · 13F rows are quarter-end snapshots, not trades

Congress vs filers

12 months
Congress net (rows)1 buy / 2 sell
Congress net ($ bound)−$29.0K to $13.0K
Filersnot computedThe filer side needs per-issuer quarter-over-quarter actions, which the published aggregate does not carry for this issuer. Convergence and divergence are stated only when both sides are computed.