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AVTR Avantor, Inc. Insider Trading

Latest: Director Bought $204K of Shares · May 2026

Multiple insiders have been active at Avantor, Inc. (AVTR): 8 distinct insiders account for 16 buy filings and 0 sell filings as of May 2026. Its highest-significance filing in the last 90 days: Director Dingemans Simon bought $204K, transaction dated May 2026.

16 filings analyzed · Latest 2026-05-11

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Buys
16
Sells
0
Insiders
8
Direction
Net buying

Avantor, Inc. leadership

CEO
Emmanuel Ligner — CHIEF EXECUTIVE OFFICER
CFO
R. Brent Jones — CHIEF FINANCIAL OFFICER
General Counsel
Claudius O. Sokenu — Executive Vice President, Chief Legal and Compliance Officer and Corporate Secretary
Chair
Gregory Summe — Chairman
May 2026
2026-05-11
low
10,000 shares
$83,200
@ $8.32
Significance 3

Director Gregory T Lucier purchases 10,000 shares as stock trades well below 52-week highs amid company losses.

Gregory T Lucier, a director at Avantor, purchased shares during a period when the stock is trading substantially below its 52-week high. The company is currently unprofitable with negative annual earnings, though the latest quarter showed a return to profitability. Lucier's prior buy at this company did not work out well — the stock declined in the months that followed that purchase. His overall track record across all holdings has been mixed at best, with prior purchases frequently followed by declines. This current purchase occurs at a moment of fundamental weakness and comes after a track record of poor timing, making it difficult to interpret as a strong conviction signal. The fact that he is continuing to buy despite prior unsuccessful trades at this company suggests either underlying conviction or lack of caution, but the weight of timing evidence does not support a bullish interpretation.

2026-05-05
high
25,000 shares
$203,500
@ $8.14
Significance 6

Director Dingemans purchases 25,000 AVTR shares at $8.14 as stock trades well below its 52-week high amid recent losses

Director Simon Dingemans purchased 25,000 shares of Avantor at $8.14, a substantial commitment during a period when the stock is trading significantly below its highs. The company is currently unprofitable, though the most recent quarter showed a return to profitability, suggesting early-stage recovery. The stock has traded sideways over the past month despite a sharp multi-month decline, creating an environment where an insider director's open-market purchase carries particular weight. Dingemans is not an officer and does not hold a ten-percent stake, so his decision reflects board-level conviction rather than management's operational perspective—yet it still signals confidence that the company's near-term trajectory justifies deploying real capital. Given the company's path back to profitability and the director's willingness to buy at depressed valuations, this trade warrants attention as a potential contrarian signal.

March 2026
2026-03-11
medium
125,000 shares
$1,001,250
@ $8.01
Significance 4

Director Sanjeev K Mehra bought 125,000 AVTR shares at $8.01 on 2026-03-10 ($1.0M); stock down -52.6% from 52-week high, company unprofitable.

Director Mehra purchased 125,000 shares at $8.01, expanding his holdings by 35.7% to 475,000 shares. The purchase occurs with AVTR trading at $8.29—down -52.6% from its 52-week high of $17.50 and -26.2% over the prior 30 days—against a backdrop of fundamental weakness: the company generated revenue of $1,623,800,000.00 but reported a net loss of $-711,800,000.00 and has contracted -3.4% year-over-year. Mehra's own prior buy at this ticker on 2025-12-05 was ill-timed, with that purchase producing -23.2% by the 90-day mark, and his cross-ticker track record shows 0% wins at 90 days with an average -23.2% return. The timing context and repeated exposure to a deteriorating position merit scrutiny, though the transaction price relative to current market levels provides limited directional signal on its own.

February 2026
2026-02-23
medium
50,000 shares
$458,000
@ $9.16
Significance 5

Director Lucier buys 50,000 shares of AVTR at $9.16; stock down -49.7% from 52-week high, company unprofitable with -$711.8M annual net income.

Gregory T. Lucier, a director, purchased 50,000 shares at $9.16 on 2026-02-19, establishing an initial position worth $458,000.00. The timing comes as AVTR trades -49.7% below its 52-week high of $17.68 and has declined -24.7% over the prior 30 days, suggesting entry into a period of significant weakness. Company fundamentals are challenged: the latest quarter showed revenue of $1,623,800,000.00 but a net loss of -$711,800,000.00, with annual revenue declining -3.4% year-over-year and the company unprofitable for the full fiscal year. Lucier's cross-ticker trading history shows modest results (8 prior buys with 33.33% 90-day win rate and average 90-day return of -0.7%), providing limited evidence of prescient market timing ability. The purchase occurs against a backdrop of deteriorating stock performance and negative operating results.

2026-02-12
medium
100,000 shares
$940,000
@ $9.40
Significance 5

Director SUMME GREGORY L buys 100,000 shares of AVTR at $9.40; stock down -52.3% from 52-week high.

SUMME GREGORY L acquired 100,000 shares at $9.40 on 2026-02-12, expanding his stake by +33.3% to 400,000 shares post-transaction. The purchase occurs at depressed levels, with the stock trading at $9.14 (current price) and -52.3% below its 52-week high of $19.16, reflecting substantial recent deterioration. AVTR fundamentals show material headwinds: the company posted a net loss of $711.8M in the latest quarter against $1.6B in revenue, with full-year net income negative and annual revenue growth contracted -3.4% year-over-year. Examining the insider's prior AVTR-specific history, his prior 4 completed buys at this ticker yielded mixed near-term outcomes—2 of 4 posts were well-timed at the 90-day mark, but the two most recent buys in August and late October 2025 underperformed, with the August buy down -12.3% at 90-day horizon. His cross-ticker buy track record shows 6 prior buys averaging +5.5% 30-day return and +0.1% 90-day return with a 60% win rate, which is modest and does not establish strong predictive power. The purchase occurs in a volatile, unprofitable company after a sharp 52-week drawdown, at a price near its bottom but amid negative momentum (-27.5% over 30 days, -19.7% over 90 days).

December 2025
2025-12-09
high
350,000 shares
$3,881,500
@ $11.09
Significance 6

Director Mehra buys 350.0K shares at $11.09 in AVTR as stock down -53.1% from 52-week high of $22.66

Director Sanjeev K Mehra purchased 350,000 shares at $11.09 for $3,881,500.00, establishing a new position after holding zero shares. The transaction occurs as Avantor trades at $10.63, down 53.1% from its 52-week high of $22.66 and down 15.7% over the past 90 days, suggesting significant price deterioration in the period preceding the purchase. The company reported a net loss of $711.8M in the latest quarter against revenue of $1.6B, while annual revenue growth stands at -2.6%, indicating operational challenges alongside the equity decline. This substantial purchase by a director into a depressed stock valuation warrants investor attention to understand the strategic rationale and confidence level behind this commitment.

November 2025
2025-11-17
high
President and CEO
87,500 shares
$993,125
@ $11.35
Significance 7

AVTR CEO Ligner Emmanuel buys 87,500 shares at $11.35 amid -52.0% decline from 52-week high

Ligner Emmanuel, President and CEO of Avantor, purchased 87,500 shares for $993,125.00, increasing his holdings by 44.7% from 195,924 to 283,424 shares. The timing of this $993.1K buy is noteworthy given that the stock trades at $10.88, representing a -52.0% pullback from the 52-week high of $22.66 and a -26.4% decline over the past 30 days. Against a backdrop of recent weakness and negative fundamentals (latest quarter net income of $-711.8M, annual revenue decline of -2.6%), a substantial insider purchase by the sitting CEO warrants investor attention. The magnitude of the position increase and the price level relative to recent highs suggest active engagement by top management during a period of material stock stress.

October 2025
2025-10-31
high
100,000 shares
$1,125,000
@ $11.25
Significance 6

Director Gregory L Summe purchases 100,000 shares of AVTR at $11.25; holdings increase to 300,000 shares.

Director Summe purchased 100,000 shares of Avantor at $11.25 on 2025-10-30, expanding his holdings by 50.0% to 300,000 shares and committing $1.1M in capital at a price -48.6% from the 52-week high of $22.99. His SAME-TICKER history at AVTR shows 3 of 4 prior buys were well-timed at the 90-day mark with positive returns, establishing a pattern of disciplined accumulation during downturns. However, the company faces near-term headwinds: annual revenue growth is -2.6%, net income stands at $-711.8M, and the stock is -13.5% over the past 30 days, suggesting Summe is acquiring shares against the current momentum. The purchase reflects confidence in current valuation but occurs in a period of operational strain.

August 2025
2025-08-22
high
100,000 shares
$1,256,000
@ $12.56
Significance 7

Director Gregory L Summe buys 100,000 shares of AVTR at $12.56 total $1.3M, doubling holdings to 200,000 shares

Director Gregory L Summe purchased 100,000 shares at $12.56 on 2025-08-21, exactly doubling his position from 100,000 to 200,000 shares for a total investment of $1,256,000.00. This is a substantial open-market acquisition executed at a price 52.1% below the 52-week high of $27.70, and just 5.3% below the current price of $13.27. Notably, his prior four trades at Avantor were all purchases, with 3 of 4 well-timed at the 90-day mark, establishing a pattern of favorable entry execution at this ticker. The company trades at a P/E of 13.14 on a $9.0B market cap with revenue of $1.7B, though annual revenue growth stands at -2.6%. The transaction occurs after a recent 30-day decline of -2.4%, suggesting entry during a period of weakness.

May 2025
2025-05-27
high
30,000 shares
$375,000
@ $12.50
Significance 6

Director Summe Gregory L bought 30,000 shares of AVTR at $12.50 on 2025-05-23, raising stake to 100,000 shares (+42.9%)

Director Summe Gregory L purchased 30,000 shares at $12.50 on 2025-05-23, the third consecutive buy in this security within one month (prior buys on 2025-05-22 and 2025-05-07). This transaction increases his holdings to 100,000 shares, a 42.9% increase from his pre-transaction position. The current price of $13.15 sits near the low end of the 52-week range ($11.94–$27.70), down 52.5% from the 52-week high, providing context for the entry point. Across his full trading history, his prior sells have averaged a 90-day return of +6.1%, indicating his prior sell timing has not been well-executed; however, his AVTR-specific trade outcomes are not yet measurable, so this pattern cannot be assessed at this ticker.

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