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AVTR

Avantor (AVTR) stock: insider trades, news & valuation

Strong buying
Close · Oct 9, 2026 $15.67 +1.8% on the day +15.7% over 12 months 52-week range $7.41 – $15.86

Share price and insider trades

AVTR closeInsider buyInsider sale
5810121518NovDecJan 2026FebMarAprMayJunJulAugSepOctBought $83,200 on 2026-05-08 · Gregory T LucierBought $203,500 on 2026-05-01 · Simon DingemansBought $458,000 on 2026-02-19 · Gregory T LucierBought $940,000 on 2026-02-12 · Gregory L SummeBought $993,125 on 2025-11-17 · Emmanuel LignerBought $1,001,250 on 2026-03-10 · Sanjeev K MehraBought $1,125,000 on 2025-10-30 · Gregory L SummeBought $3,881,500 on 2025-12-05 · Sanjeev K Mehra
Bought, 12 months$8.7M
Sold, 12 months$0
Insiders buying5
Insiders selling0

Avantor insider trading at a glance (Oct 9, 2026): in the past 12 months, 5 insiders bought $8.7M and 0 sold $0 of AVTR stock on the open market.

AVTR insider buying and selling by quarter

Open-market purchases (green, above the line) and sales (red, below), by trade date.

Q4 2025: $6.0M bought (3 trades)$6.0MQ4 2025Q1 2026: $2.4M bought (3 trades)$2.4MQ1 2026Q2 2026: $287K bought (2 trades)$287KQ2 2026Q3 2026Q4 2026
QuarterBoughtPurchasesSoldSales
Q4 2026—0—0
Q3 2026—0—0
Q2 2026$287K2—0
Q1 2026$2.4M3—0
Q4 2025$6.0M3—0

Valuation, profit and volume

P/E (trailing)n/aSector median —
Market value— 
Profit margin—Revenue growth —
Volume vs. 50-day0.9×Last 5 sessions
Insiders' paper profit+$4.6MOn all tracked purchases +52.9%

Summary

Over the past 12 months, 5 Avantor, Inc. insiders reported open-market purchases totaling $8.7M, while 0 insiders reported sales totaling $0. Among insiders with enough purchase history to measure, Gregory T Lucier (Director) has the highest Insider Score at 41.

Insider transactions

Open-market purchases and sales.

Filed Insider Type Shares Price Value Since Score
May 11SEC Gregory T LucierDirector Buy 10,00060,000 held (+20%) $8.32 $83K +88.3% 41
May 5SEC Simon DingemansDirector Buy 25,000new position $8.14 $204K +92.5% —
Mar 11SEC Sanjeev K MehraDirector Buy 125,000475,000 held (+36%) $8.01 $1.0M +95.6% 40
Feb 23SEC Gregory T LucierDirector Buy 50,000new position $9.16 $458K +71.1% 41
Feb 12SEC Gregory L SummeDirector Buy 100,000400,000 held (+33%) $9.40 $940K +66.7% 25
Dec 9SEC Sanjeev K MehraDirector Buy 350,000new position $11.09 $3.9M +41.3% 40
Nov 17SEC Emmanuel LignerCEO, President Buy 87,500283,424 held (+45%) $11.35 $993K +38.1% —
Oct 31SEC Gregory L SummeDirector Buy 100,000300,000 held (+50%) $11.25 $1.1M +39.3% 25

Insiders at Avantor, Inc.

InsiderBoughtSoldLast filingScore
Sanjeev K MehraDirector $4.9M — Mar 11, 2026 40
Gregory L SummeDirector $2.1M — Feb 12, 2026 25
Emmanuel LignerCEO, President $993K — Nov 17, 2025 —
Gregory T LucierDirector $541K — May 11, 2026 41
Simon DingemansDirector $204K — May 5, 2026 —

AVTR stock: common questions

Are Avantor, Inc. insiders buying AVTR stock?

In the past 12 months, 5 insiders reported open-market purchases of AVTR worth $8.7M. The latest was Director Gregory T Lucier bought $83K of AVTR at $8.32 — raises the stake by 20%.

Are Avantor, Inc. insiders selling AVTR stock?

0 insiders reported sales worth $0 over the same period.

Where does this data come from?

Every transaction comes from Form 4 filings that insiders must submit to the SEC within two business days of a trade. We pull them from SEC EDGAR every night.

What is AVTR's 52-week range?

Over the past year AVTR has traded between $7.41 and $15.86. It last closed at $15.67 on Oct 9, 2026.