Avantor, Inc.
US ˙ NYSE ˙ US05352A1007

Introduction

This page provides a comprehensive analysis of the known insider trading history of Steven W Eck. Insiders are officers, directors, or significant investors in a company. It is illegal for insiders to make trades in their companies based on specific, non-public information. This does not mean it is illegal for them to make any trades in their own companies. However, they must report all trades to the SEC via a Form 4. Despite these restrictions, academic research suggests that insiders - in general - tend to outperform the market in their own companies.

Average Trade Profitability

The average trade profitability is the average return of all the open market purchases made by the insider in the last three years. To calculate this, we examine every open-market, unplanned purchase made by the insider, excluding all trades that were marked as part of a 10b5-1 trading plan. We then calculate the average performance of those trades over 3, 6, and 12 months, averaging each of those durations to generate a final performance metric for each trade. Finally, we average all of the performance metrics to calculate a performance metric for the insider. This list only includes insiders that have made at least three trades in the last two years.

If this insiders trade profitability is "N/A", then the insider either has not made any open-market purchases in the last three years, or the trades they’ve made are too recent to calculate a reliable performance metric.

Update Frequency: Daily

See the list of most profitable insider traders.

Companies with Reported Insider Positions

The SEC filings indicate Steven W Eck has reported holdings or trades in the following companies:

Security Title Latest Reported Holdings
US:AVTR / Avantor, Inc. SVP & Chief Accounting Officer 55,068
US:CSS / CSS Industries, Inc. VP - Finance and Accounting 5,000
How to Interpret the Charts

The following charts show the stock performance of securities subsequent to each open-market, non-planned trade made by Steven W Eck. Non-planned trade are trades that were not made as part of a 10b5-1 trading plan. The stock performance is charted as cumulative percent change in share price. For example, if an insider trade was made on January 1, 2019, the chart will show the daily percent change of the security to the present day. If the share price were to go from $10 to $15 during this time, the cumulative percent change in share price would be 50%. A change in price from $10 to $20 would be 100%, and a change in price of $10 to $5 would be -50%.

Ultimately, we are trying to determine how closely the insider’s trades correlate to excess returns (positive or negative) in the share price in order to see if the insider is timing their trades to profit from insider information. Consider the situation where an insider was doing this. In this situation, we would expect either (a) positive returns after purchases, or (b) negative returns after sales. In the case of (a), the PURCHASE chart would show a series of upwardly sloping curves, indicating positive returns after each purchase transaction. In the case of (b), the SALE chart would show a series of downward sloping curves, indicating negative returns after each sale transaction.

However, this alone is not enough to draw conclusions. If, for example, the share price of the company was in a non-cyclical climb over many years, then we would expect all the post-purchase plots to be upwardly sloping. Likewise, non-cyclical declines over many years would result in downward sloping post-trade plots. Neither of these charts would suggest insider trading activity.

The strongest indicator would be a situation where the share price was extremely cyclical, and there were both positive signals in the PURCHASE chart and negative plots on the SALE chart. This situation would be highly suggestive of an insider that was timing trades to their financial advantage.

Insider Purchases AVTR / Avantor, Inc. - Short Term Profit Analysis

In this section, we analyze the profitability of every unplanned, open-market insider purchase made in AVTR / Avantor, Inc.. This analysis helps to understand if the insider consistently generates abnormal returns, and is worth following. This analysis is for one-year following each trade, and the results are theoretical.

The following table shows the most recent open market purchases that were not part of an automatic trading plan.

Trade Date Ticker Insider Reported
Shares
Reported
Price
Adjusted
Shares
Adjusted
Price
Cost Basis Days to
Max
Price at
Max
Max
Profit ($)
Max Return (%)
There are no known unplanned open-market trades for this insider and security combination

Adjusted Price is the split-adjusted price. Adjusted Shares is the split-adjusted shares.

AVTR / Avantor, Inc. Insider Trades
Insider Sales AVTR / Avantor, Inc. - Short Term Loss Analysis

In this section, we analyze the short-term loss avoidance of every unplanned, open-market insider sale made in AVTR / Avantor, Inc.. A consistent pattern of loss avoidance may suggest that future sale transactions may predict declines in price. This analysis is for one-year following each trade, and the results are theoretical.

The following table shows the most recent open market sales that were not part of an automatic trading plan.

Trade Date Ticker Insider Reported
Shares
Reported
Price
Adjusted
Shares
Adjusted
Price
Cost Basis Days to
Min
Price at
Min
Max Loss
Avoided ($)
Max Loss
Avoided (%)
2025-08-05 AVTR Eck Steven W 3,476 11.3900 3,476 11.3900 39,592 1 11.1800 -729 -1.84
2025-02-27 AVTR Eck Steven W 1,033 17.0000 1,033 17.0000 17,561
2025-02-26 AVTR Eck Steven W 4,907 17.5300 4,907 17.5300 86,020
2024-09-05 AVTR Eck Steven W 3,525 25.0600 3,525 25.0600 88,336
2023-09-07 AVTR Eck Steven W 7,577 20.6400 7,577 20.6400 156,389
2021-08-26 AVTR Eck Steven W 17,383 40.0800 17,383 40.0800 696,711

Adjusted Price is the split-adjusted price. Adjusted Shares is the split-adjusted shares.

AVTR / Avantor, Inc. Insider Trades
Insider Trading History

This table shows the complete list of insider trades made by Steven W Eck as disclosed to the Securities Exchange Commission (SEC).

File Date Tran Date Form Ticker Security Code 10b5-1 Shares Remaining Shares Percent
Change
Share
Price
Tran
Value
Remaining
Value
2025-08-06 2025-08-05 4 AVTR Avantor, Inc.
Common Stock
S - Sale -3,476 55,068 -5.94 11.39 -39,592 627,225
2025-08-04 2025-07-31 4 AVTR Avantor, Inc.
Common Stock
F - Taxes -1,385 58,544 -2.31 13.44 -18,614 786,831
2025-05-12 2025-05-09 4 AVTR Avantor, Inc.
Common Stock
A - Award 20,358 59,929 51.45
2025-02-28 2025-02-27 4 AVTR Avantor, Inc.
Common Stock
S - Sale -1,033 39,571 -2.54 17.00 -17,561 672,707
2025-02-28 2025-02-26 4 AVTR Avantor, Inc.
Common Stock
S - Sale -4,907 40,604 -10.78 17.53 -86,020 711,788
2025-02-26 2025-02-25 4 AVTR Avantor, Inc.
Common Stock
F - Taxes -505 45,511 -1.10 17.56 -8,868 799,173
2025-02-26 2025-02-24 4 AVTR Avantor, Inc.
Common Stock
F - Taxes -439 46,016 -0.95 17.47 -7,669 803,900
2025-02-24 2025-02-23 4 AVTR Avantor, Inc.
Common Stock
F - Taxes -1,956 46,455 -4.04 17.30 -33,839 803,672
2025-02-24 2025-02-20 4 AVTR Avantor, Inc.
Common Stock
A - Award 18,867 48,411 63.86
2024-09-06 2024-09-05 4 AVTR Avantor, Inc.
Common Stock
S - Sale -3,525 29,544 -10.66 25.06 -88,336 740,373
2024-08-01 2024-07-31 4 AVTR Avantor, Inc.
Common Stock
F - Taxes -1,337 33,069 -3.89 26.75 -35,765 884,596
2024-03-12 2024-03-08 4 AVTR Avantor, Inc.
Common Stock
S - Sale X -3,685 34,406 -9.67 25.63 -94,447 881,826
2024-02-27 2024-02-23 4 AVTR Avantor, Inc.
Common Stock
A - Award 11,704 38,091 44.36
2024-02-26 2024-02-25 4 AVTR Avantor, Inc.
Common Stock
F - Taxes -505 26,387 -1.88 24.35 -12,297 642,523
2024-02-26 2024-02-24 4 AVTR Avantor, Inc.
Common Stock
F - Taxes -438 26,892 -1.60 24.35 -10,665 654,820
2024-02-26 2024-02-23 4 AVTR Avantor, Inc.
Common Stock
F - Taxes -422 27,330 -1.52 24.35 -10,276 665,486
2024-02-22 2024-02-20 4 AVTR Avantor, Inc.
Common Stock
F - Taxes -435 27,752 -1.54 24.05 -10,462 667,436
2023-09-07 2023-09-07 4 AVTR Avantor, Inc.
Common Stock
S - Sale -7,577 28,187 -21.19 20.64 -156,389 581,780
2023-08-02 2023-07-31 4 AVTR Avantor, Inc.
Common Stock
A - Award 14,584 35,764 68.86
2023-05-19 2023-05-17 4 AVTR Avantor, Inc.
Common Stock
F - Taxes -553 21,180 -2.54 20.28 -11,215 429,530
2023-02-27 2023-02-25 4 AVTR Avantor, Inc.
Common Stock
F - Taxes -505 21,733 -2.27 24.62 -12,433 535,066
2023-02-27 2023-02-24 4 AVTR Avantor, Inc.
Common Stock
A - Award 5,347 22,238 31.66
2023-02-27 2023-02-23 4 AVTR Avantor, Inc.
Common Stock
F - Taxes -421 16,891 -2.43 24.59 -10,352 415,350
2023-02-22 2023-02-20 4 AVTR Avantor, Inc.
Common Stock
F - Taxes -435 17,312 -2.45 24.54 -10,675 424,836
2022-05-19 2022-05-17 4 AVTR Avantor, Inc.
Common Stock
F - Taxes -573 17,747 -3.13 31.33 -17,952 556,014
2022-02-25 2022-02-25 4 AVTR Avantor, Inc.
Common Stock
F - Taxes -518 18,320 -2.75 35.39 -18,332 648,345
2022-02-25 2022-02-23 4 AVTR Avantor, Inc.
Stock Options (Right to Buy)
A - Award 14,858 14,858
2022-02-25 2022-02-23 4 AVTR Avantor, Inc.
Common Stock
A - Award 5,138 18,838 37.50
2022-02-22 2022-02-20 4 AVTR Avantor, Inc.
Common Stock
F - Taxes -448 13,700 -3.17 34.00 -15,232 465,800
2021-08-27 2021-08-26 4 AVTR Avantor, Inc.
Common Stock
S - Sale -17,383 14,148 -55.13 40.08 -696,711 567,052
2021-05-19 2021-05-17 4 AVTR Avantor, Inc.
Common Stock
F - Taxes -553 31,531 -1.72 30.90 -17,088 974,308
2021-03-01 2021-02-25 4 AVTR Avantor, Inc.
Stock Options (Right to Buy)
A - Award 19,906 19,906
2021-03-01 2021-02-25 4 AVTR Avantor, Inc.
Common Stock
A - Award 6,151 32,084 23.72
2021-02-26 2021-02-24 4 AVTR Avantor, Inc.
Common Stock
F - Taxes -2,577 25,955 -9.03 27.94 -72,001 725,183
2021-02-26 2021-02-24 4 AVTR Avantor, Inc.
Common Stock
M - Exercise 8,550 28,532 42.79
2021-02-23 2021-02-22 4 AVTR Avantor, Inc.
Common Stock
F - Taxes -449 19,982 -2.20 28.69 -12,882 573,284
2021-01-06 2020-12-31 4 AVTR Avantor, Inc.
Common Stock
F - Taxes -3,052 20,431 -13.00 28.15 -85,914 575,133
2020-05-19 2020-05-17 4 AVTR Avantor, Inc.
Common Stock
F - Taxes -573 23,483 -2.38 17.86 -10,234 419,406
2020-02-25 2020-02-21 4 AVTR Avantor, Inc.
Stock Options (Right to Buy)
A - Award 51,323 51,323
2020-02-25 2020-02-21 4 AVTR Avantor, Inc.
Common Stock
A - Award 5,306 24,056 28.30
2019-06-12 3 AVTR Avantor, Inc.
Common Stock
37,500
2019-06-12 3 AVTR Avantor, Inc.
Common Stock
37,500
2019-06-12 3 AVTR Avantor, Inc.
Common Stock
37,500
2018-08-06 2018-08-06 4 CSS CSS INDUSTRIES INC
Restricted Stock Units
A - Award 5,000 5,000
2018-08-06 3 CSS CSS INDUSTRIES INC
No securities beneficially owned
0
P
Open market or private purchase of non-derivative or derivative security
S
Open market or private sale of non-derivative or derivative security
A
Grant, award, or other acquisition of securities from the company (such as an option)
C
Conversion of derivative
D
Sale or transfer of securities back to the company
F
Payment of exercise price or tax liability using portion of securities received from the company
G
Gift of securities by or to the insider
K
Equity swaps and similar hedging transactions
M
Exercise or conversion of derivative security received from the company (such as an option)
V
A transaction voluntarily reported on Form 4
J
Other (accompanied by a footnote describing the transaction)