Avantor (AVTR)

Avantor on one page: short interest, daily short volume, fails to deliver, planned sales, large holders, 13F holders, financials, earnings dates and insider trades. Listed on NYSE, classified by the SEC as laboratory analytical instruments.

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39.3M

Short interest

settlement 2026-09-30

4.2

Days to cover

-2.0 days vs prior

66.7%

Short share of volume

2026-10-09

Fails to deliver

settlement 2026-09-14

Wed 28 Oct

Next earnings

estimated date

Insider flow, 90 days

0 buys, 0 sells

As of 2026-10-09.

Short interest

FINRA, twice a month. The newest 24 settlements in the table, 48 in the chart. JSON

As of 30 September 2026, short interest in AVTR is 39,348,974 shares, down 10,864,697 shares over the last month. Over the last 48 readings it ranged from 21,944,903 shares (31 October 2025) to 55,976,133 shares (15 July 2026). At the reported average volume of 9.5M shares a day that is 4.2 days to cover.

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Settlement	Shares short	Change	Avg daily volume	Days to cover
2026-09-30	39,348,974	-23.4%	9,465,117	4.16
2026-09-15	51,373,338	+2.3%	8,295,797	6.19
2026-08-31	50,213,671	-3.8%	5,801,598	8.66
2026-08-14	52,194,128	-1.8%	7,555,417	6.91
2026-07-31	53,171,919	-5.0%	15,756,310	3.37
2026-07-15	55,976,133	+7.7%	8,639,707	6.48
2026-06-30	51,956,711	+18.0%	8,296,020	6.26
2026-06-15	44,043,913	+8.5%	10,099,187	4.36
2026-05-29	40,606,499	+4.9%	10,953,417	3.71
2026-05-15	38,720,031	-4.0%	9,200,441	4.21
2026-04-30	40,344,011	-4.8%	10,631,764	3.79
2026-04-15	42,393,605	-3.4%	7,790,250	5.44
2026-03-31	43,873,960	+13.7%	8,582,905	5.11
2026-03-13	38,572,963	-1.6%	11,324,717	3.41
2026-02-27	39,218,288	-1.6%	8,787,441	4.46
2026-02-13	39,873,526	+5.7%	17,223,829	2.32
2026-01-30	37,710,659	+25.3%	13,997,283	2.69
2026-01-15	30,097,069	+7.4%	10,695,655	2.81
2025-12-31	28,022,150	+2.7%	10,511,294	2.67
2025-12-15	27,279,839	-9.3%	10,233,826	2.67
2025-11-28	30,081,223	+17.6%	8,137,151	3.70
2025-11-14	25,588,353	+16.6%	8,595,829	2.98
2025-10-31	21,944,903	-6.5%	16,223,135	1.35
2025-10-15	23,465,890	-9.8%	10,302,334	2.28

Daily short volume

FINRA Reg SHO, the last 30 sessions. JSON

As of 9 October 2026, the short share of AVTR volume is 66.7%, up 20.6 points over the last five sessions. Over the last 30 readings it ranged from 31.4% (21 September 2026) to 73.3% (10 September 2026). The latest reading is 15.6 points above the 30-session average of 51.1%, on 1.7M shares reported.

Date	Short volume	Total volume	Short share	Exempt
2026-10-09	1.1M	1.7M	66.7%	114
2026-10-08	1.4M	2.4M	59.8%	3,341
2026-10-07	1.3M	2.6M	52.1%	232
2026-10-06	2.5M	4.1M	60.9%	230
2026-10-05	1.4M	2.7M	53.0%	140
2026-10-02	941K	2.0M	46.1%	153
2026-10-01	1.7M	3.8M	43.9%	1,960
2026-09-30	1000K	2.2M	46.4%	2,800
2026-09-29	946K	2.4M	40.1%	0
2026-09-28	1.3M	3.0M	43.6%	63,879
2026-09-25	854K	2.0M	43.0%	840
2026-09-24	1.3M	2.9M	44.9%	0
2026-09-23	1.6M	4.5M	36.2%	1,451
2026-09-22	1.9M	3.9M	48.4%	0
2026-09-21	1.2M	3.9M	31.4%	224
2026-09-18	2.2M	4.8M	45.9%	1,840
2026-09-17	2.4M	4.0M	59.4%	4,218
2026-09-16	1.6M	4.6M	36.1%	80
2026-09-15	1.6M	3.1M	51.2%	3,892
2026-09-14	2.2M	4.3M	51.5%	1,380
2026-09-11	1.5M	2.6M	56.0%	1,539
2026-09-10	2.1M	2.8M	73.3%	6,708
2026-09-09	2.0M	2.9M	67.5%	169
2026-09-08	3.0M	5.4M	56.0%	1,399
2026-09-04	1.6M	3.0M	53.9%	10
2026-09-03	2.1M	3.5M	60.6%	3,253
2026-09-02	1.4M	3.6M	39.5%	5,138
2026-09-01	1.6M	2.4M	64.7%	6,581
2026-08-31	900K	1.8M	50.7%	21
2026-08-28	970K	1.9M	50.7%	1,604

Fails to deliver

SEC, the last 30 settlement dates with a fail. JSON

As of 14 September 2026, the fails-to-deliver balance in AVTR is 1 share, down 231 shares over the last settlement date. Over the last 30 readings it ranged from 1 share (14 September 2026) to 59,919 shares (8 April 2026). The latest reading sits at the bottom of that range.

Settlement	Shares failed	Price	Value
2026-09-14	1	$14.81	$15
2026-09-11	232	$14.88	$3K
2026-09-01	16,308	$14.54	$237K
2026-08-31	16,340	$14.58	$238K
2026-08-28	16,397	$14.61	$240K
2026-08-25	8,000	$14.26	$114K
2026-08-24	10,835	$14.46	$157K
2026-08-21	53,800	$14.25	$767K
2026-08-19	16,539	$13.33	$220K
2026-08-11	23	$13.73	$316
2026-08-07	32	$13.18	$422
2026-08-04	2,151	$13.67	$29K
2026-08-03	41	$13.78	$565
2026-07-29	65	$12.42	$807
2026-07-27	19,841	$11.44	$227K
2026-07-20	394	$11.07	$4K
2026-07-07	84	$10.37	$871
2026-06-30	635	$10.03	$6K
2026-06-22	201	$9.58	$2K
2026-06-17	139	$9.57	$1K
2026-06-15	94	$9.39	$883
2026-06-08	820	$9.16	$8K
2026-06-01	125	$9.12	$1K
2026-05-13	18,829	$8.17	$154K
2026-05-06	7,118	$8.05	$57K
2026-05-04	27,381	$7.96	$218K
2026-04-30	995	$7.85	$8K
2026-04-27	122	$7.90	$964
2026-04-20	1,000	$8.52	$9K
2026-04-08	59,919	$8.00	$479K

Insider trades

SEC Form 4, newest first, 50 of 100 shown. JSON

No open-market insider trades were reported for AVTR in the last 90 days. The most recent filings are listed below. Latest filing: Garner Todd W (EVP and CFO) on 2026-09-21.

Date	Insider	Title	Type	Shares	Price	Value	Owned after
2026-09-21	Garner Todd W	EVP and CFO	Grant	50K	$0.00	$0	50K
2026-08-18	Ligner Emmanuel	President and CEO	Tax withholding	30K	$13.33	$397K	737K
2026-08-14	Hankamer Brittany	EVP, Chief HR Officer	Tax withholding	181	$13.66	$2K	249K
2026-07-31	Eck Steven W	SVP & Chief Accounting Officer	Tax withholding	1K	$13.78	$19K	130K
2026-07-24	Sokenu Claudius	EVP, Chief Legal & Compliance	Tax withholding	1K	$11.44	$14K	251K
2026-06-21	Walker Corey	President, VWR Dist. & Servs.	Tax withholding	3K	$9.58	$29K	385K
2026-05-08	LUCIER GREGORY T	Director	Buy	10K	$8.32	$83K	60K
2026-05-07	Murthy Mala	Director	Grant	25K	$0.00	$0	69K
2026-05-07	LUCIER GREGORY T	Director	Grant	25K	$0.00	$0	34K
2026-05-07	Dingemans Simon	Director	Grant	25K	$0.00	$0	31K
2026-05-07	Makin Louise	Director	Grant	25K	$0.00	$0	47K
2026-05-07	Massaro Joseph R	Director	Grant	25K	$0.00	$0	77K
2026-05-07	MEHRA SANJEEV K	Director	Grant	25K	$0.00	$0	33K
2026-05-07	SEVERINO MICHAEL	Director	Grant	25K	$0.00	$0	86K
2026-05-07	SUMME GREGORY L	Director	Grant	25K	$0.00	$0	83K
2026-05-01	Dingemans Simon	Director	Buy	25K	$8.14	$204K	25K
2026-05-01	Brellier Ludovic	EVP, Bioscience & Medtech	Grant	147K	$0.00	$0	147K
2026-04-03	Eck Steven W	SVP & Chief Accounting Officer	Grant	32K	$0.00	$0	131K
2026-03-10	MEHRA SANJEEV K	Director	Buy	125K	$8.01	$1.0M	475K
2026-02-24	Hankamer Brittany	EVP, Chief HR Officer	Tax withholding	359	$9.11	$3K	249K
2026-02-24	Eck Steven W	SVP & Chief Accounting Officer	Tax withholding	452	$9.11	$4K	99K
2026-02-23	Sokenu Claudius	EVP, Chief Legal & Compliance	Tax withholding	2K	$8.89	$21K	252K
2026-02-23	Hankamer Brittany	EVP, Chief HR Officer	Tax withholding	1K	$8.89	$12K	249K
2026-02-23	Jones R. Brent	EVP, Chief Financial Officer	Tax withholding	3K	$8.89	$25K	420K
2026-02-23	Gourdier Benoit	EVP, Bioscience & Medtech	Tax withholding	3K	$8.89	$27K	363K
2026-02-23	Eck Steven W	SVP & Chief Accounting Officer	Tax withholding	2K	$8.89	$18K	100K
2026-02-20	Hankamer Brittany	EVP, Chief HR Officer	Tax withholding	1K	$9.03	$13K	251K
2026-02-20	Eck Steven W	SVP & Chief Accounting Officer	Tax withholding	2K	$9.03	$19K	102K
2026-02-20	Walker Corey	President, VWR Dist. & Servs.	Tax withholding	5K	$9.03	$45K	388K
2026-02-20	Sokenu Claudius	EVP, Chief Legal & Compliance	Tax withholding	3K	$9.03	$26K	255K
2026-02-20	Gourdier Benoit	EVP, Bioscience & Medtech	Tax withholding	4K	$9.03	$38K	366K
2026-02-20	Jones R. Brent	EVP, Chief Financial Officer	Tax withholding	10K	$9.03	$86K	423K
2026-02-19	Hankamer Brittany	EVP, Chief HR Officer	Grant	81K	$0.00	$0	252K
2026-02-19	LUCIER GREGORY T	Director	Buy	50K	$9.16	$458K	50K
2026-02-19	Blenn Mary	EVP, Chief Operating Officer	Grant	236K	$0.00	$0	253K
2026-02-19	Eck Steven W	SVP & Chief Accounting Officer	Grant	49K	$0.00	$0	104K
2026-02-19	Ligner Emmanuel	President and CEO	Grant	484K	$0.00	$0	767K
2026-02-19	Walker Corey	President, VWR Dist. & Servs.	Grant	161K	$0.00	$0	393K
2026-02-19	Sokenu Claudius	EVP, Chief Legal & Compliance	Grant	81K	$0.00	$0	258K
2026-02-19	Gourdier Benoit	EVP, Bioscience & Medtech	Grant	134K	$0.00	$0	370K
2026-02-19	Jones R. Brent	EVP, Chief Financial Officer	Grant	161K	$0.00	$0	432K
2026-02-12	SUMME GREGORY L	Director	Buy	100K	$9.40	$940K	400K
2026-01-02	Dingemans Simon	Director	Grant	6K	$0.00	$0	6K
2025-12-05	MEHRA SANJEEV K	Director	Buy	350K	$11.09	$3.9M	350K
2025-12-05	MEHRA SANJEEV K	Director	Grant	8K	$0.00	$0	8K
2025-11-17	Ligner Emmanuel	President and CEO	Buy	88K	$11.35	$993K	283K
2025-11-10	Blenn Mary	EVP, Chief Operating Officer	Grant	17K	$0.00	$0	17K
2025-10-30	SUMME GREGORY L	Director	Buy	100K	$11.25	$1.1M	300K
2025-10-03	LUCIER GREGORY T	Director	Grant	9K	$0.00	$0	9K
2025-10-02	Gourdier Benoit	EVP, Bioscience Production	Tax withholding	1K	$13.77	$17K	236K

Form 4 filings are due within two business days of the trade. Insiders sell for many reasons that say nothing about the company; open-market buys are rarer.

Planned sales (Form 144)

Newest first. JSON

1 Form 144 notice on file for AVTR worth $733K at the prices reported; 0 in the last 90 days worth $0. Latest: Todd Edwards filed on 2025-11-06 to sell 29,131 shares ($733K) from 2025-11-06.

Filed	Seller	Shares	Market value	Of outstanding	Sale from	Broker
2025-11-06	Todd Edwardsofficer	29K	$733K	0.024%	2025-11-06	Merrill

Large holders (13D and 13G)

One row per reporting person with its latest filing, newest first. JSON

2 holders report 5% or more of AVTR in their latest filing, all on Schedule 13G (passive). The largest reported stake is BlackRock, Inc. at 8.7% of the class (59,049,575 shares), filed 2025-10-17 for an event on 2025-09-30.

Filed	Form	Holder	Shares	Of class	Event
2026-04-29	13G	Vanguard Capital Managementinvestment adviser	35.8M	5.3%	2026-03-31
2026-03-26	13G/Ano. 5	The Vanguard Groupinvestment adviser	0	0.0%	2026-03-13
2025-11-14	13G/Ano. 7	T. Rowe Price Investment Management, Inc.investment adviser	32.9M	4.8%	2025-09-30
2025-10-17	13G/Ano. 5	BlackRock, Inc.parent holding company	59.0M	8.7%	2025-09-30

13F holders

Tracked managers holding AVTR at their latest 13F. JSON

5 of the 30 tracked managers held AVTR at their latest 13F, $224.3M in total at quarter-end prices. AQR Capital Management is the largest at $115.1M (0.0% of its portfolio) as of 2026-06-30. Over the prior quarter 2 added shares and 3 cut.

Fund	Quarter	Shares	Value	Of portfolio	Change in shares
AQR Capital Management	2026-06-30	11.6M	$115.1M	0.04%	+6.8M
D. E. Shaw & Co.	2026-06-30	9.6M	$94.8M	0.05%	-3.5M
Millennium Management	2026-06-30	754K	$7.5M	0.00%	-1.7M
Citadel Advisors	2026-06-30	399K	$4.0M	0.00%	-170K
Bridgewater Associates	2026-06-30	301K	$3.0M	0.01%	+173K

Only the 30 tracked managers on the funds hub; a 13F reports long positions in US listed stock at quarter end, 45 days late, and says nothing about shorts or positions sold since.

Financials

SEC XBRL, as filed. JSON

In Q1 FY 2026 (quarter ended 2026-03-31) Avantor reported revenue of $1.58B, up 0.0% from the same quarter a year earlier, and net income of $43.3M (0.06 diluted EPS). In FY 2025 it generated $623.8M of operating cash flow and spent $75.1M on buybacks. As of 2026-03-31, cash was $279.3M against $3.82B of debt.

Cash: $279.3M
Debt: $3.82B
Equity: $5.59B
Total assets: $11.66B
Shares outstanding: 682,755,402

Quarterly, last 8 quarters

Quarter	Period end	Revenue	Net income	Margin	Diluted EPS
Q1 FY 2026	2026-03-31	$1.58B	$43.3M	2.7%	0.06
Q4 FY 2025derived	2025-12-31	$1.66B	$52.4M	3.1%	n/a
Q3 FY 2025	2025-09-30	$1.62B	-$711.8M	-43.8%	-1.04
Q2 FY 2025	2025-06-30	$1.68B	$64.7M	3.8%	0.09
Q1 FY 2025	2025-03-31	$1.58B	$64.5M	4.1%	0.09
Q4 FY 2024derived	2024-12-31	$1.69B	$500.4M	29.7%	n/a
Q3 FY 2024	2024-09-30	$1.71B	$57.8M	3.4%	0.08
Q2 FY 2024	2024-06-30	$1.70B	$92.9M	5.5%	0.14

Fiscal years, with buybacks and dividends

Fiscal year	Ends	Revenue	Net income	Operating cash flow	Capex	Buybacks	Dividends
FY 2025	2025-12-31	$6.55B	-$530.2M	$623.8M	$128.8M	$75.1M	n/a
FY 2024	2024-12-31	$6.78B	$711.5M	$840.8M	$148.8M	$0	n/a
FY 2023	2023-12-31	$6.97B	$321.1M	$870.0M	$146.4M	$0	n/a
FY 2022	2022-12-31	$7.51B	$686.5M	$843.6M	$133.4M	n/a	n/a
FY 2021	2021-12-31	$7.39B	$572.6M	$953.6M	$111.1M	n/a	n/a

Quarters are the three-month figures the company reports; a fourth quarter marked derived is the fiscal year less the three reported quarters, since companies report it only inside the 10-K. Fiscal years are the annual figures. Buybacks are the cash the company paid to repurchase its common stock in the year, not the amount authorized. Balance sheet lines are as of 2026-03-31; shares outstanding as of 2026-04-24 from the cover page.

What this page is

Avantor in the regulatory record

Regulators publish company data in separate files that never sit next to each other: FINRA's twice-monthly short interest, its daily short sale volume, the SEC's fails-to-deliver counts, and each insider's Form 4. A company page puts those series for one ticker on one URL, with planned sales, large holders, 13F holders and financials beside them, so the short position, the daily flow, the settlement fails and what insiders are doing can be read together.

Each section has its own history table, a one-line summary of the latest figures and its own JSON and CSV links, and says when its source last updated.

This page follows Avantor (AVTR), SEC CIK 1722482, listed on NYSE, classified by the SEC as laboratory analytical instruments. The cross-market tables live on the short interest and insider transactions hubs.

Source and updates

Short interest: FINRA consolidated short interestSource: FINRA.Twice a month, about eight business days after settlement. Latest 2026-09-30.JSON and CSV
Daily short volume: FINRA Reg SHO daily filesSource: FINRA.Every trading day, the morning after FINRA posts it. Latest 2026-10-09.JSON and CSV
Fails to deliver: SEC fails-to-deliver dataSource: SEC.Twice a month, a few weeks after the half month ends. Latest 2026-09-14.JSON and CSV
Planned sales: SEC EDGAR Form 144Source: SEC.New notices appear shortly after the SEC posts them; a notice is filed on or before the sale. Latest 2025-11-06.JSON and CSV
Large holders: SEC EDGAR Schedule 13D and 13GSource: SEC.New filings appear shortly after the SEC posts them. A 13D is due within five business days of crossing 5%; a 13G follows the passive schedule. Latest 2026-04-29.JSON and CSV
13F holders: SEC EDGAR Form 13F-HRSource: SEC.Quarterly, filed within 45 days of quarter end; 30 tracked managers. Latest 2026-06-30.JSON and CSV
Financials: SEC EDGAR 10-K and 10-Q filingsSource: SEC.Weekly; values are as filed in the 10-Q and 10-K. Latest 2026-03-31.JSON and CSV
Earnings dates: SEC EDGAR 8-K filings (Item 2.02)Source: SEC.Twice a day. Reported dates come from the company's 8-K filings; the next date is marked as an estimate until the 8-K arrives. Latest 2026-04-29.JSON and CSV
Insider trades: SEC EDGAR Form 4Source: SEC.New filings appear shortly after the SEC posts them; they're due two business days after the trade. Latest 2026-09-21.JSON and CSV
Company record: EDGAR filing index for CIK 1722482Ticker, name and exchange from the SEC's company list, refreshed weekly.
Rate limits: 10 requests a minute without a key, 30 with a free key from a free account.

How to read it

Read the position against the flow: rising short interest with a high daily short share is new shorting; rising short interest with a normal short share is old shorts holding on.
Insider buys next to a large short position are rare and stand out; insider sells next to one are common and mean little.
Fails to deliver matter relative to the float, not in absolute shares; a million failed shares in a mega cap is noise.

Analysis of what the data shows, not advice. XOOMAR does not recommend buying, selling or holding anything.

Other companies the SEC classifies as laboratory analytical instruments

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Datasets

Frequently Asked Questions

How much of AVTR is sold short?

39,348,974 shares were held short at the 2026-09-30 settlement, 4.2 days of average volume. FINRA publishes the next count about eight business days after the 15th and the last business day of the month.

What is AVTR's daily short volume?

On 2026-10-09, 1,135,449 of the 1,702,429 AVTR shares reported to FINRA were sold short, 66.7% of the day's reported volume. Short volume is a flow for one day, not a position.

Does AVTR have fails to deliver?

The SEC's latest file shows 1 AVTR shares failed to deliver at settlement 2026-09-14. Fails are reported per settlement date and published twice a month with a lag.

Are AVTR insiders buying or selling?

No open-market insider trades were reported for AVTR in the last 90 days. The most recent filings are listed below. Latest filing: Garner Todd W (EVP and CFO) on 2026-09-21.

Have AVTR insiders filed to sell?

1 Form 144 notice on file for AVTR worth $733K at the prices reported; 0 in the last 90 days worth $0. Latest: Todd Edwards filed on 2025-11-06 to sell 29,131 shares ($733K) from 2025-11-06.

Who owns 5% or more of AVTR?

What did AVTR report last quarter?

Which tracked 13F managers own AVTR?

5 of the 30 tracked 13F managers held AVTR shares at their latest filing, $224.3M in all. The largest: Cliff Asness's AQR Capital Management (11.6M shares, $115.1M), D. E. Shaw & Co. (9.6M shares, $94.8M), Izzy Englander's Millennium Management (754K shares, $7.5M), Ken Griffin's Citadel Advisors (399K shares, $4.0M), Ray Dalio's Bridgewater Associates (301K shares, $3.0M).

Data on this page is provided for informational purposes only and is not financial advice. See our editorial policy.