undamentalytics Newsletter

Avantor, Inc. insider trading

Every open-market purchase and sale by Avantor, Inc.'s officers, directors and largest shareholders since November 4, 2021, and what the share price did next.

Insider purchase Insider sale Marker size reflects trade value. Weekly closes adjusted for splits; may be delayed.
Avantor, Inc. insider open-market trades
DateInsiderTrade SharesPriceValue 1M after 3M after 6M after

From insiders' Form 4 filings with the SEC: open-market purchases and sales only (awards, option exercises and shares withheld for tax are excluded), combined to one line per insider per day. "Plan" marks trades the filing says were made under a pre-set Rule 10b5-1 trading plan, which are scheduled in advance. Price changes run from the close on the trade date; hover a figure for the change relative to the S&P 500. Past moves don't predict future ones.

Does following Avantor, Inc.’s insiders pay?

From February 20, 2020 to May 11, 2026, 24 insiders reported 19 open-market purchases and 32 sales not made under a pre-set plan in Avantor, Inc. Twelve months after each purchase was reported, the shares were −50.3% against the S&P 500 on average (median −64.9%), over 11 purchases with a full year of prices; 0% beat the index. After sales, the shares moved +1.9% against the index over 12 months (a negative figure means selling was the right call). That rests on fewer than 20 purchases, too few to read much into. Buying each purchase the day after it was reported, an equal amount each, held 12 months or until that insider reported a sale, would have turned $10,000 on August 16, 2021 into $8,749 by November 2, 2026, −2.5% a year. It held shares 67% of the time; the S&P 500 on those same days, with Treasury bills otherwise, made $17,084 (+10.9% a year), and held throughout $18,153 (+12.2%).

$0$10.0k$20.0k 202120222023202420252026 $18.2k$17.1k$8.7k
Copying Avantor, Inc.'s insidersS&P 500, same days investedS&P 500, held throughout $10,000 copying every open-market purchase by Avantor, Inc.'s insiders from August 16, 2021, before costs and taxes, marked weekly. Uninvested money earns the Treasury bill rate; the portfolio held shares 67% of the time.
Avantor, Inc.: each insider's record
InsiderRolePurchases12 months after their purchasesBeat the S&P 500Sales12 months after their salesLatest report
Summe Gregory L Director 7 −54.9% (5) 0% 0 — February 12, 2026
Natauri Jo Director 1 −25.4% (1) 0% 4 +19.3% (4) August 13, 2021
Ohri Devashish EVP, IMEA 0 — — 5 +8.5% (5) May 28, 2021
Vanderhaegen Frederic EVP, Americas and Europe 0 — — 4 −18.4% (4) August 28, 2023
Wondrasch Michael EVP & CIO 0 — — 4 +14.2% (4) May 24, 2021
Eck Steven W SVP & Chief Accounting Officer 0 — — 3 −30.7% (3) September 6, 2024
Bramwell James EVP Sales, Customer Excellence 0 — — 2 −50.5% (2) March 1, 2024
Connolly Thomas Director 0 — — 2 +14.5% (2) May 7, 2021
Gupta Rajiv Director 0 — — 2 +2.0% (2) May 28, 2021
Lucier Gregory T Director 2 — — 0 — May 11, 2026
Mehra Sanjeev K Director 2 — — 0 — March 11, 2026
Couturier Christophe EVP, AMEA 0 — — 1 −48.6% (1) March 1, 2024
Dingemans Simon Director 1 — — 0 — May 5, 2026
Kang Lan Director 1 −70.2% (1) 0% 0 — April 29, 2025
Klinsky Steven B 10% owner 0 — — 1 +29.2% (1) May 28, 2020
Ligner Emmanuel President and CEO 1 — — 0 — November 17, 2025
Massaro Joseph R Director 1 −70.2% (1) 0% 0 — April 29, 2025
Miller Justin EVP & General Counsel 0 — — 1 +58.6% (1) September 9, 2020
New Mountain Capital Group, L.P. 10% owner 0 — — 1 +50.8% (1) August 25, 2020
New Mountain Partners III LP 10% owner 0 — — 1 +12.6% (1) November 10, 2020
Peacock Jonathan M Director 1 −70.2% (1) 0% 0 — April 29, 2025
Shaw Christi Director 0 — — 1 +15.8% (1) December 15, 2020
Stubblefield Michael CEO 1 −21.4% (1) 0% 0 — November 17, 2022
Szlosek Thomas A EVP & CFO 1 −21.4% (1) 0% 0 — November 17, 2022

Moves are the shares’ return including dividends minus the S&P 500’s, from the close on the first trading day after each report; the number of trades with a finished 12-month window is in brackets. Green means the trade went the insider’s way (a purchase ahead of the index, a sale followed by the shares trailing it). A trade reported both by a director or officer and by a fund or company they are linked to counts once here, under the person. Purchases count only where the share price actually traded was at least $5. These figures describe what the shares did, not why anyone traded. Insiders across all companies.

When several insiders traded Avantor, Inc.

Months when 2 or more insiders became net buyers, or 3 or more net sellers, of Avantor, Inc. in reports dated in the 91 days before the month end, and how the stock did against the S&P 500 from that month end. After the 3 buying crowds with six months of prices, it averaged −28.9% against the index. After 2 selling crowds, +15.2%. One company's history is too short to judge by; the test across every company is the better guide.

MonthCrowd3 months on, vs S&P 5006 months12 months
November 28, 20252 buying−25.0%−35.1%not yet
April 30, 20254 buying−10.9%−35.5%−70.2%
November 30, 20222 buying+13.1%−16.0%−18.4%
May 28, 20217 selling+14.6%+13.3%+2.4%
May 29, 20205 selling+0.2%+17.1%+29.2%

Colours show whether the crowd was right: green when buyers were followed by a rise above the index, or sellers by a fall below it. Total returns from the month end; past patterns are not a forecast.

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