Avantor, Inc.
Avantor, Inc. (AVTR) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · AVTR · as of Sep 30, 2025
Ownership Breakdown
488
Institutional Holders
▼ 46 vs Q2
$8.47B
Total Inst. Value
▼ $1.11B vs Q2
682.76M
Shares Outstanding
freeFloat 96.94%
678.79M
13F Shares Held
▼ 33.09M vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
AVTR largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
DODGE & COX laboratory analytical instruments | 117.75M | 17.28% | 17.28% | $1.47T | Nov 13, 2025 | ▲ 313.4K |
VANGUARD GROUP INC laboratory analytical instruments | 65.99M | 9.68% | 9.68% | $823.54B | Nov 7, 2025 | ▲ 1.14M |
BLACKROCK, INC. laboratory analytical instruments | 60.72M | 8.91% | 8.91% | $757.75B | Nov 12, 2025 | ▼ 11.19M |
BARROW HANLEY MEWHINNEY & STRAUSS LLC laboratory analytical instruments | 34.55M | 5.07% | 5.07% | $431.16B | Nov 13, 2025 | ▲ 3.36M |
T. ROWE PRICE INVESTMENT MANAGEMENT, INC. laboratory analytical instruments | 32.93M | 4.83% | 4.83% | $410.94B | Nov 14, 2025 | ▼ 23.57M |
STATE STREET CORP laboratory analytical instruments | 20.37M | 2.99% | 2.99% | $254.16B | Nov 14, 2025 | ▼ 3.12M |
ENGINE CAPITAL MANAGEMENT, LP laboratory analytical instruments | 19.72M | 2.89% | 2.89% | $246.11B | Nov 14, 2025 | ▲ 14.22M |
GREENHAVEN ASSOCIATES INC laboratory analytical instruments | 18.31M | 2.69% | 2.69% | $228.53B | Nov 4, 2025 | NEW |
INVESCO LTD. laboratory analytical instruments | 16.05M | 2.36% | 2.36% | $200.35B | Nov 13, 2025 | ▲ 119.5K |
CLARKSTON CAPITAL PARTNERS, LLC laboratory analytical instruments | 15.02M | 2.20% | 2.20% | $187.45B | Nov 13, 2025 | ▲ 1.04M |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
30
Increased
+57.69M shares3
New Positions
first time holders16
Decreased
−53.20M shares0
Sold Out
fully exitedNet shares change (top 50)
+4.49M
+57.69M / −53.20M
Net new holders
+17
3 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
AVTR insider trading · insider activity
Source: SEC Form 4
Insiders have been net buyers of shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
20
Buy transactions
13
Sell transactions
1.54
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
Murthy Mala director | May 7, 2026 | Award | 25,270 | — | — | 69.5K | Form 4 ↗ |
LUCIER GREGORY T director | May 8, 2026 | Purchase | 10,000 | $8.32 | $83.2K | 60.0K | Form 4 ↗ |
LUCIER GREGORY T director | May 7, 2026 | Award | 25,270 | — | — | 34.0K | Form 4 ↗ |
Dingemans Simon director | May 7, 2026 | Award | 25,270 | — | — | 31.5K | Form 4 ↗ |
Makin Louise director | May 7, 2026 | Award | 25,270 | — | — | 47.1K | Form 4 ↗ |
Massaro Joseph R director | May 7, 2026 | Award | 25,270 | — | — | 77.4K | Form 4 ↗ |
MEHRA SANJEEV K director | May 7, 2026 | Award | 25,270 | — | — | 33.4K | Form 4 ↗ |
SEVERINO MICHAEL director | May 7, 2026 | Award | 25,270 | — | — | 85.8K | Form 4 ↗ |
SUMME GREGORY L director | May 7, 2026 | Award | 25,270 | — | — | 83.4K | Form 4 ↗ |
Dingemans Simon director | May 1, 2026 | Purchase | 25,000 | $8.14 | $203.5K | 25.0K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Avantor, Inc. (AVTR) is primarily owned by institutional investors, who hold approximately 99.4% of total shares outstanding. Company insiders own approximately 3.06%, while retail and public investors account for the remaining 0.00%.
The largest institutional shareholder of Avantor, Inc. is DODGE & COX, holding approximately 117.75 million shares — equal to 17.28% of outstanding shares — as of September 30, 2025.
A total of 488 institutional investors currently hold AVTR stock, with a combined institutional value of approximately $8.47 billion as of the most recent 13F filing period.
Frequently asked questions
AVTR ownershipAvantor, Inc. (AVTR) is primarily owned by institutional investors, who hold approximately 99.4% of shares. The largest shareholder is DODGE & COX with a 17.28% stake. Company insiders hold 3.06%. Data sourced from SEC Form 13F as of September 30, 2025.