Lightrock Netherlands B.V. AVTR — AVANTOR INC

Ownership history in Lightrock Netherlands B.V.  ·  5 quarters on record

AI Ownership Summary

Lightrock Netherlands B.V. reported AVANTOR INC (AVTR) in 5 quarterly 13F filings from 2025 Q1 through 2026 Q1. Peak portfolio weight reached 1.96% in 2026 Q1. The latest visible filing shows AVTR at 1.96% 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 AVTR ownership page tells you

This page is designed to answer the real investor question behind a 13F filing: how meaningful was Lightrock Netherlands B.V.'s position in AVANTOR 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

AVTR was reported at 1.96% of portfolio in the most recent visible filing.

High-water mark
Peak Conviction
1.96% in 2026 Q1

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

Time in book
Holding Window
2025 Q1 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.

AVTR stock page Lightrock Netherlands B.V. fund profile Lightrock Netherlands B.V. full holdings
How Lightrock Netherlands B.V. held AVTR — position size vs. price
% of Fund (quarterly)    AVTR price (quarter-end, indexed to 100)    SPY (indexed to 100)    QQQ (indexed to 100)
📋 Quarterly Holdings History 5 quarters  ▾
Quarter Action Sold % After 3M Timing Shares Change Chg % % of Fund Mkt Value Filed Price (Filed)
2026 Q1 ADDED — — — 328,626 +61,158 +22.9% 1.96% $9.2M 2026-05-06 $8.43
2025 Q4 REDUCED 51.8% -31.6% ✅ 267,468 -287,912 -51.8% 1.78% $8.6M 2026-01-26 $11.79
2025 Q3 ADDED — — — 555,380 +52,880 +10.5% 1.54% $5.9M 2025-10-31 $11.82
2025 Q2 ADDED — — — 502,500 +287,500 +133.7% 1.59% $5.8M 2025-08-04 $11.30
2025 Q1 INITIATED — — — 215,000 — — 0.92% $3.5M 2025-04-29 $12.69

🏢 Other funds also holding AVTR

As of 2026 Q1 — sorted by position size

Brickwood Asset Management LLP 25.52% GREENHAVEN ASSOCIATES INC 3Y 7Y 2.92% AGMAN CAPITAL LLC 2.59% Olstein Capital Management, L.P. 3Y 7Y 2.07% Gerald Baker Financial Group LLC 0.78% Robeco Schweiz AG 3Y 7Y 0.69% YACKTMAN ASSET MANAGEMENT LP 3Y 7Y 0.5% Carnegie Lake Advisors LLC 0.32% Oak Thistle LLC 3Y 0.11% TRAN CAPITAL MANAGEMENT, L.P. 3Y 7Y 0.09%

FAQ About Lightrock Netherlands B.V. and AVTR

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

How long has Lightrock Netherlands B.V. reported owning AVTR?

Lightrock Netherlands B.V. reported AVTR across 5 quarterly 13F filings, from 2025 Q1 through 2026 Q1.

What was the largest reported AVTR position in Lightrock Netherlands B.V.'s portfolio?

The largest reported portfolio weight for AVTR was 1.96% in 2026 Q1.

What is the latest reported AVTR position on this page?

The most recent filing on this page is 2026 Q1, when Lightrock Netherlands B.V. reported 328,626 shares, equal to 1.96% of portfolio, with an estimated market value of $9.2M.

What does the chart on this AVTR ownership page compare?

The chart compares Lightrock Netherlands B.V.'s quarterly AVTR 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 Lightrock Netherlands B.V. time their AVTR position?

Based on 13F filing dates vs. subsequent AVTR price moves, Lightrock Netherlands B.V. correctly timed 2 out of 4 reported position changes (50%). The annualised alpha on AVTR relative to SPY over the holding period was -49.6%.

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