SEC Form 4
Avantor, Inc. (AVTR) insider trading
In the 12 months to Nov 10, 2026, 5 AVTR insiders reported open-market purchases of $7.6M across 7 filings; no open-market sales were filed.
Latest filing · Last 12 months · Source: SEC EDGAR · How we count
- Open-market sales
- $0
- 0 filings · 0 insiders
- Open-market purchases
- $7.6M
- 7 filings
Who traded AVTR, and when
- Purchase
AVTR daily close from Nov 10, 2025 to Nov 10, 2026, between $7.41 and $17.29, last $15.66. 0 sale and 7 purchase filings by 5 insiders, marked at their filing dates. Sanjeev K. Mehra, Director: bought $4.9M across 2 filings, first filed Dec 9, 2025, last Mar 11, 2026. Emmanuel Ligner, President and CEO: bought $993.1K across 1 filing, first filed Nov 17, 2025, last Nov 17, 2025. Gregory L. Summe, Director: bought $940.0K across 1 filing, first filed Feb 12, 2026, last Feb 12, 2026. Gregory T. Lucier, Director: bought $541.2K across 2 filings, first filed Feb 23, 2026, last May 11, 2026. Simon Dingemans, Director: bought $203.5K across 1 filing, first filed May 5, 2026, last May 5, 2026.
Largest mark · tap a row for others
Sanjeev K. Mehra · Director
Purchase $3,881,500
350,000 shares at $11.09 avg
Filed Dec 9, 2025 · traded Dec 5
Close on filing date $10.63
Sanjeev K. Mehra · Director
Director
$4.9M boughtEmmanuel Ligner · President and CEO
President and CEO
$993.1K boughtGregory L. Summe · Director
Director
$940.0K boughtGregory T. Lucier · Director
Director
$541.2K boughtSimon Dingemans · Director
Director
$203.5K boughtOpen-market trades
7 filings in the last 12 months| Insider | Role | Sold | Bought | Filings | Pre-arranged (10b5-1) | Last filed |
|---|---|---|---|---|---|---|
| Sanjeev K. Mehra | Director | — | $4.9M | 2 | — | |
| Emmanuel Ligner | President and CEO | — | $993.1K | 1 | — | |
| Gregory L. Summe | Director | — | $940.0K | 1 | — | |
| Gregory T. Lucier | Director | — | $541.2K | 2 | — | |
| Simon Dingemans | Director | — | $203.5K | 1 | — |
| Filed | Insider | Type | Shares | Avg price | Value | Held after | Source |
|---|---|---|---|---|---|---|---|
traded | Gregory T. Lucier Director | Purchase | 10,000 | $8.32 | $83.2K | 60,000 | |
traded | Simon Dingemans Director | Purchase | 25,000 | $8.14 | $203.5K | 25,000 | |
traded | Sanjeev K. Mehra Director | Purchase | 125,000 | $8.01 | $1.0M | 475,000 | |
traded | Gregory T. Lucier Director | Purchase | 50,000 | $9.16 | $458.0K | 50,000 | |
traded | Gregory L. Summe Director | Purchase | 100,000 | $9.40 | $940.0K | 400,000 | |
traded | Sanjeev K. Mehra Director | Purchase | 350,000 | $11.09 | $3.9M | 350,000 | |
traded | Emmanuel Ligner President and CEO | Purchase | 87,500 | $11.35 | $993.1K | 283,424 |
GET /stocks/filings/vX/form-4?tickers=AVTR&filing_date.gte=2025-11-10&sort=filing_date.desc&limit=500{
"status": "OK",
"results": [
{
"tickers": [
"AVTR"
],
"issuer_cik": "0001722482",
"owner_cik": "0001251299",
"accession_number": "0001628280-26-033605",
"form_type": "4",
"filing_date": "2026-05-11",
"period_of_report": "2026-05-07",
"issuer_name": "Avantor, Inc.",
"issuer_trading_symbol": "AVTR",
"owner_name": "LUCIER GREGORY T",
"is_director": true,
"is_officer": false,
"is_ten_percent_owner": false,
"is_other": false,
"security_type": "non_derivative",
"record_type": "transaction",
"security_title": "Common Stock",
"transaction_timeliness": "O",
"aff_10b5_one": false,
"transaction_date": "2026-05-08",
"transaction_code": "P",
"equity_swap_involved": false,
"transaction_shares": 10000,
"transaction_price_per_share": 8.32,
"transaction_acquired_disposed": "A",
"shares_owned_following_transaction": 60000,
"transaction_value": 83200,
"not_subject_to_section_16": false,
"direct_or_indirect": "I",
"nature_of_ownership": "By a Trust",
"footnotes": [
{
"id": "F2",
"description": "The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions ranging from $8.30 to $8.32, inclusive. The Reporting Person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each price within the range set forth above."
},
{
"id": "F3",
"description": "By a trust of which the reporting person serves as trustee and is a beneficiary. The reporting person disclaims beneficial ownership except to the extent of his pecuniary interest therein."
}
]
},
{
"tickers": [
"AVTR"
],
"issuer_cik": "0001722482",
"owner_cik": "0002104604",
"accession_number": "0001628280-26-030826",
"form_type": "4",
"filing_date": "2026-05-05",
"period_of_report": "2026-05-01",
"issuer_name": "Avantor, Inc.",
"issuer_trading_symbol": "AVTR",
"owner_name": "Dingemans Simon",
"is_director": true,
"is_officer": false,
"is_ten_percent_owner": false,
"is_other": false,
"security_type": "non_derivative",
"record_type": "transaction",
"security_title": "Common Stock",
"transaction_timeliness": "O",
"aff_10b5_one": false,
"transaction_date": "2026-05-01",
"transaction_code": "P",
"equity_swap_involved": false,
"transaction_shares": 25000,
"transaction_price_per_share": 8.14,
"transaction_acquired_disposed": "A",
"shares_owned_following_transaction": 25000,
"transaction_value": 203500,
"not_subject_to_section_16": false,
"direct_or_indirect": "I",
"nature_of_ownership": "By Spouse"
}
]
}
// trimmed to 2 resultsThe response includes every Form 4 record; this page keeps open-market purchases and sales on common stock and removes duplicate joint-filer rows.
Other insider activity (not market trades) · 42 records
- Tax withholding18 records
- Grants and awards24 records
Reported on Form 4 but not purchases or sales in the market, so not counted in the totals above.
How to read this page
- Open-market purchase or sale
- A buy or sell of the company's stock at market price. Grants, option exercises, shares withheld for tax, gifts and employee stock plan purchases are listed separately and not counted.
- Filing date
- Insiders have two business days to report a trade. Totals and the chart use the filing date, when the trade became public.
Frequently asked questions
Has Avantor, Inc.'s CEO sold stock?
No. Emmanuel Ligner (CEO) made no open-market sales filed as CEO in the last 12 months.
How current is AVTR’s insider data?
These are AVTR Form 4 filings from the last year, refreshed daily. The Massive Form 4 API has the full, continuously updated record.
What counts as an open-market buy or sell?
Only purchases and sales at the market price. Option exercises, grants, gifts, and shares withheld for taxes are reported on Form 4 but are left out of the buy and sell totals.
Build with AI
Track AVTR insider trades with your agent
This page joins two Massive endpoints: Form 4 filings and daily prices. Ask an agent to watch for new filings:
Using the Massive API (massive.com/docs/llms.txt), check Form 4 filings for AVTR every day with transaction_code=P and tell me when an insider files an open-market purchase, with their role, shares, price and the filing link.
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