Ariston Services Group TMO — THERMO FISHER SCIENTIFIC INC

Ownership history in Ariston Services Group  ·  10 quarters on record

AI Ownership Summary

Ariston Services Group reported THERMO FISHER SCIENTIFIC INC (TMO) in 10 quarterly 13F filings from 2023 Q4 through 2026 Q1. Peak portfolio weight reached 0.29% in 2024 Q1. The latest visible filing shows TMO at 0.21% of the fund.

This page tracks quarterly shares, estimated market value, portfolio weight, filing dates, and disclosure-aligned stock prices directly from SEC EDGAR 13F filings.

What this TMO ownership page tells you

This page is designed to answer the real investor question behind a 13F filing: how meaningful was Ariston Services Group's position in THERMO FISHER SCIENTIFIC INC, and how did that conviction change over time? You can read the holding window, peak weight, latest reported size, disclosure timing, and quarter-by-quarter changes without piecing the story together from raw SEC rows.

Freshest filing
Latest Reported Filing
2026 Q1

TMO was reported at 0.21% of portfolio in the most recent visible filing.

High-water mark
Peak Conviction
0.29% in 2024 Q1

Peak weight helps separate a token disclosure from a real conviction holding the fund genuinely cared about.

Time in book
Holding Window
2023 Q4 to 2026 Q1

Longer holding windows often tell a very different story from short-lived tactical trades or one-quarter experiments.

Decision context
Why It Matters
Position size beats headlines

Knowing that a fund owned a stock is useful. Knowing whether it was a 0.20% placeholder or a true high-conviction position is where the signal actually starts.

TMO stock page Ariston Services Group fund profile Ariston Services Group full holdings
How Ariston Services Group held TMO — position size vs. price
% of Fund (quarterly)    TMO price (quarter-end, indexed to 100)    SPY (indexed to 100)    QQQ (indexed to 100)
📋 Quarterly Holdings History 10 quarters  ▾
Quarter Action Sold % After 3M Timing Shares Change Chg % % of Fund Mkt Value Filed Price (Filed)
2026 Q1 REDUCED — — — — -717 -100.0% 0.21% $352K 2026-04-22 $513.98
2025 Q4 UNCHANGED — — — 717 — 0% 0.24% $415K 2026-01-23 $625.36
2025 Q3 ADDED — — — 717 +191 +36.3% 0.21% $348K 2025-10-28 $556.66
2025 Q2 UNCHANGED — — — 526 — 0% 0.15% $213K 2025-07-29 $480.89
2025 Q1 UNCHANGED — — — 526 — 0% 0.22% $262K 2025-05-14 $404.56
2024 Q4 UNCHANGED — — — 526 — 0% 0.24% $274K 2025-02-06 $570.13
2024 Q3 UNCHANGED — — — 526 — 0% 0.28% $325K 2024-10-25 $551.47
2024 Q2 REDUCED — — — 526 -2 -0.4% 0.28% $291K 2024-07-17 $551.80
2024 Q1 UNCHANGED — — — 528 — 0% 0.29% $307K 2024-04-18 $537.97
2023 Q4 INITIATED — — — 528 — — 0.27% $280K 2024-03-21 $580.30

🏢 Other funds also holding TMO

As of 2026 Q1 — sorted by position size

Cryder Capital Partners LLP 3Y 7Y 12.09% Lindsell Train Ltd 3Y 7Y 9.67% WORMSER FRERES GESTION 7.75% R.H. Dinel Investment Counsel, Inc. 3Y 7Y 7.13% CALEDONIA INVESTMENTS PLC 3Y 7Y 6.42% C WorldWide Group Holding A/S 3Y 7Y 6.24% Rempart Asset Management Inc. 3Y 4.9% James Hambro & Partners LLP 3Y 7Y 4.64% Nexus Investment Management ULC 3Y 7Y 4.6% FLOSSBACH VON STORCH SE 3Y 7Y 4.48%

FAQ About Ariston Services Group and TMO

These are the practical questions this page is built to answer before you even open the full history table.

How long has Ariston Services Group reported owning TMO?

Ariston Services Group reported TMO across 10 quarterly 13F filings, from 2023 Q4 through 2026 Q1.

What was the largest reported TMO position in Ariston Services Group's portfolio?

The largest reported portfolio weight for TMO was 0.29% in 2024 Q1.

What is the latest reported TMO position on this page?

The latest section of the table and chart shows the most recent reported TMO position for Ariston Services Group.

What does the chart on this TMO ownership page compare?

The chart compares Ariston Services Group's quarterly TMO portfolio weight with the stock's indexed share price, so you can see whether the fund was building, trimming, or holding the position as price moved.

How well did Ariston Services Group time their TMO position?

Based on 13F filing dates vs. subsequent TMO price moves, Ariston Services Group correctly timed 2 out of 3 reported position changes (67%). The annualised alpha on TMO relative to SPY over the holding period was -19.6%.

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