ENDRA Life Sciences (NDRA)

ENDRA Life Sciences on one page: short interest, daily short volume, fails to deliver, planned sales, large holders, 13F holders, earnings dates and insider trades. Listed on Nasdaq, classified by the SEC as electromedical & electrotherapeutic apparatus.

Download CSV

24K

Short interest

settlement 2026-10-15

1.4

Days to cover

+0.4 days vs prior

38.4%

Short share of volume

2026-11-02

1,941

Fails to deliver

settlement 2026-09-03

Fri 13 Nov

Next earnings

estimated date

Insider flow, 90 days

0 buys, 0 sells

As of 2026-11-02.

Short interest

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

As of 15 October 2026, short interest in NDRA is 24,087 shares, down 7,253 shares over the last month. Over the last 48 readings it ranged from 15,787 shares (30 June 2025) to 841,047 shares (31 October 2024). The latest reading sits at the bottom of that range. At the reported average volume of 18K shares a day that is 1.4 days to cover.

Embed this chart.The embed keeps its attribution line.

<iframe src="https://xoomar.com/embed/stocks/ndra" width="100%" height="440" style="border:0;max-width:100%" loading="lazy" title="XOOMAR chart"></iframe>

Preview Dark previewAdd ?theme=dark to the src for a dark chart.

Settlement	Shares short	Change	Avg daily volume	Days to cover
2026-10-15	24,087	-14.7%	17,629	1.37
2026-09-30	28,233	-9.9%	49,307	1.00
2026-09-15	31,340	-0.9%	78,974	1.00
2026-08-31	31,615	+5.1%	12,876	2.46
2026-08-14	30,078	-8.7%	16,996	1.77
2026-07-31	32,947	+19.2%	18,914	1.74
2026-07-15	27,635	-34.4%	36,764	1.00
2026-06-30	42,119	+92.3%	81,330	1.00
2026-06-15	21,904	+10.5%	14,810	1.48
2026-05-29	19,820	-39.2%	18,084	1.10
2026-05-15	32,603	-11.8%	15,696	2.08
2026-04-30	36,954	-23.5%	21,491	1.72
2026-04-15	48,279	-8.4%	17,179	2.81
2026-03-31	52,702	-2.2%	44,448	1.19
2026-03-13	53,910	-65.2%	86,029	1.00
2026-02-27	154,773	+163.6%	511,270	1.00
2026-02-13	58,719	+27.0%	23,319	2.52
2026-01-30	46,244	-6.3%	29,584	1.56
2026-01-15	49,378	-15.3%	15,186	3.25
2025-12-31	58,311	-25.3%	18,189	3.21
2025-12-15	78,064	-7.3%	131,567	1.00
2025-11-28	84,183	-16.1%	91,881	1.00
2025-11-14	100,283	+12.7%	45,097	2.22
2025-10-31	89,024	-8.2%	120,903	1.00
2025-10-15	96,975	-1.6%	1,325,189	1.00
2025-09-30	98,587	-6.6%	33,036	2.98
2025-09-15	105,564	+2.8%	42,036	2.51
2025-08-29	102,740	-19.8%	18,831	5.46
2025-08-15	128,091	-1.6%	98,220	1.30
2025-07-31	130,143	-44.1%	91,135	1.43
2025-07-15	232,753	+1374.3%	9,820,998	1.00
2025-06-30	15,787	-6.8%	23,605	1.00
2025-06-13	16,935	-67.1%	36,454	1.00
2025-05-30	51,411	-23.0%	36,771	1.40
2025-05-15	66,777	-45.2%	164,191	1.00
2025-04-30	121,804	+172.7%	653,460	1.00
2025-04-15	44,663	+41.4%	156,444	1.00
2025-03-31	31,580	-22.2%	5,977	5.28
2025-03-14	40,610	+43.3%	11,551	3.52
2025-02-28	28,334	-9.2%	9,155	3.09
2025-02-14	31,202	-6.0%	11,121	2.81
2025-01-31	33,202	-15.7%	20,923	1.59
2025-01-15	39,390	-24.5%	25,217	1.56
2024-12-31	52,147	+15.1%	47,668	1.09
2024-12-13	45,296	-32.3%	59,624	1.00
2024-11-29	66,935	+7.0%	140,911	1.00
2024-11-15	62,582	-92.6%	178,435	1.00
2024-10-31	841,047	+17.2%	35,610,588	1.00

Daily short volume

FINRA Reg SHO, the last 30 sessions. JSON

As of 2 November 2026, the short share of NDRA volume is 38.4%, up 4.1 points over the last five sessions. Over the last 30 readings it ranged from 5.5% (13 October 2026) to 74.5% (23 October 2026). The latest reading is 2.5 points above the 30-session average of 35.8%, on 2K shares reported.

Date	Short volume	Total volume	Short share	Exempt
2026-11-02	807	2K	38.4%	0
2026-10-30	854	7K	12.4%	0
2026-10-29	6K	10K	58.5%	0
2026-10-28	1K	4K	40.5%	0
2026-10-27	2K	3K	49.4%	0
2026-10-26	2K	5K	34.2%	0
2026-10-23	2K	3K	74.5%	0
2026-10-22	2K	6K	29.9%	0
2026-10-21	4K	13K	32.5%	0
2026-10-20	3K	13K	24.9%	0
2026-10-19	2K	4K	39.4%	0
2026-10-16	2K	13K	17.5%	0
2026-10-15	1K	4K	36.6%	0
2026-10-14	874	7K	12.5%	0
2026-10-13	107	2K	5.5%	0
2026-10-12	887	6K	15.3%	1
2026-10-09	2K	17K	14.1%	15
2026-10-08	2K	5K	30.1%	0
2026-10-07	976	3K	32.2%	0
2026-10-06	933	5K	17.1%	0
2026-10-05	8K	14K	61.0%	0
2026-10-02	6K	19K	33.4%	0
2026-10-01	6K	13K	46.5%	0
2026-09-30	4K	13K	29.1%	0
2026-09-29	5K	9K	53.0%	0
2026-09-28	3K	14K	24.3%	0
2026-09-25	4K	15K	29.3%	0
2026-09-24	11K	18K	63.1%	0
2026-09-23	17K	31K	54.4%	0
2026-09-22	20K	31K	65.1%	0

Fails to deliver

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

As of 3 September 2026, the fails-to-deliver balance in NDRA is 1,941 shares, down 232 shares over the last settlement date. Over the last 30 readings it ranged from 2 shares (2 July 2026) to 3,768 shares (8 April 2026).

Settlement	Shares failed	Price	Value
2026-09-03	1,941	$6.46	$13K
2026-07-16	2,173	$5.61	$12K
2026-07-15	2,761	$5.54	$15K
2026-07-10	2,780	$5.49	$15K
2026-07-06	73	$4.72	$345
2026-07-02	2	$5.04	$10
2026-06-29	771	$4.99	$4K
2026-06-26	2,345	$4.30	$10K
2026-06-25	2,394	$6.19	$15K
2026-06-24	303	$5.31	$2K
2026-06-23	868	$5.18	$4K
2026-06-22	826	$4.76	$4K
2026-06-18	1,666	$5.01	$8K
2026-06-17	782	$4.62	$4K
2026-06-16	850	$4.85	$4K
2026-06-12	1,708	$4.44	$8K
2026-06-05	8	$4.77	$38
2026-05-29	265	$5.52	$1K
2026-05-22	292	$5.35	$2K
2026-05-19	202	$5.41	$1K
2026-05-15	428	$5.90	$3K
2026-05-13	1,096	$5.79	$6K
2026-04-28	39	$4.84	$189
2026-04-17	1,110	$5.24	$6K
2026-04-15	562	$5.10	$3K
2026-04-13	582	$4.94	$3K
2026-04-09	111	$5.17	$574
2026-04-08	3,768	$5.34	$20K
2026-04-02	848	$4.65	$4K
2026-03-30	1,255	$4.47	$6K

Insider trades

SEC Form 4, newest first. JSON

No open-market insider trades were reported for NDRA in the last 90 days. The most recent filings are listed below. Latest filing: Tokman Alexander Y (Chief Executive Officer) on 2026-03-02.

Date	Insider	Title	Type	Shares	Price	Value	Owned after
2026-03-02	Tokman Alexander Y	Chief Executive Officer	Grant	27K	$0.00	$0	102K
2026-03-02	Jacroux Richard	Chief Financial Officer	Grant	13K	$0.00	$0	33K
2026-01-21	Harsh Michael	Director	Grant	60K	$0.00	$0	66K
2026-01-21	Jacroux Richard	Chief Financial Officer	Grant	20K	$0.00	$0	20K
2026-01-21	Tokman Alexander Y	Chief Executive Officer	Grant	75K	$0.00	$0	75K
2026-01-21	DIGIANDOMENICO ANTHONY	Director	Grant	60K	$0.00	$0	137K
2026-01-21	Basenese Lou	Director	Grant	60K	$0.00	$0	66K
2025-10-10	DIGIANDOMENICO ANTHONY	Director	Grant	71K	$7.06	$500K	76K
2025-06-11	Harsh Michael	Director	Grant	5K	$0.00	$0	5K
2025-06-11	DIGIANDOMENICO ANTHONY	Director	Grant	5K	$0.00	$0	5K
2025-06-11	Basenese Lou	Director	Grant	5K	$0.00	$0	5K
2024-08-27	UBS Group AG	TenPercentOwner	Buy	4K	$0.55	$2K	146K
2024-08-27	UBS Group AG	Other	Buy	0	$0.00	$0	146K
2023-05-18	Thornton Michael Milos	Chief Technology Officer	Buy	15K	$1.65	$25K	34K
2023-05-02	DIGIANDOMENICO ANTHONY	Director	Buy	83K	$1.20	$100K	102K
2022-12-09	Thornton Michael Milos	Chief Technology Officer	Buy	2K	$3.40	$5K	19K
2022-11-23	Tokman Alexander Y	Director	Buy	10K	$0.17	$2K	163K
2022-08-22	Tokman Alexander Y	Director	Buy	20K	$0.26	$5K	153K
2022-08-22	Thornton Michael Milos	Chief Technology Officer	Buy	20K	$0.27	$5K	353K
2022-05-26	Thornton Michael Milos	Chief Technology Officer	Buy	25K	$0.21	$5K	333K
2022-05-18	Thornton Michael Milos	Chief Technology Officer	Buy	25K	$0.22	$6K	308K
2022-05-17	Michelon Francois Roger	Chief Executive Officer	Buy	5K	$0.19	$969	97K
2022-05-16	Tokman Alexander Y	Director	Buy	100K	$0.20	$20K	133K
2021-08-26	Basenese Lou	Director	Sell	5K	$1.85	$9K	49K
2021-08-25	Basenese Lou	Director	Sell	45K	$1.83	$82K	54K
2021-04-07	Thornton Michael Milos	Chief Technology Officer	Sell	15K	$2.53	$38K	260K
2021-03-29	Thornton Michael Milos	Chief Technology Officer	Sell	19K	$2.37	$44K	275K
2021-02-11	Thornton Michael Milos	Chief Technology Officer	Grant	23K	$0.00	$0	317K
2021-01-28	Thornton Michael Milos	Chief Technology Officer	Grant	23K	$0.00	$0	317K
2021-01-13	Maloberti Renaud Bertrand	Chief Commercial Officer	Sell	14K	$1.10	$15K	2K
2021-01-12	Maloberti Renaud Bertrand	Chief Commercial Officer	Sell	6K	$1.05	$7K	15K
2021-01-08	Tokman Alexander Y	Director	Sell	10K	$0.90	$9K	33K
2021-01-08	Maloberti Renaud Bertrand	Chief Commercial Officer	Sell	9K	$0.94	$8K	22K
2021-01-06	Wells David R.	Chief Financial Officer	Sell	35K	$0.90	$31K	80K
2021-01-06	Maloberti Renaud Bertrand	Chief Commercial Officer	Sell	11K	$0.94	$11K	30K
2021-01-05	Wells David R.	Chief Financial Officer	Sell	100	$0.90	$90	115K
2020-12-17	Maloberti Renaud Bertrand	Chief Commercial Officer	Sell	25K	$0.73	$18K	42K
2020-12-04	Michelon Francois Roger	Chief Executive Officer	Sell	72K	$0.83	$59K	92K
2020-11-13	Maloberti Renaud Bertrand	Chief Commercial Officer	Sell	10K	$0.81	$8K	67K
2020-10-01	Maloberti Renaud Bertrand	Chief Commercial Officer	Sell	10K	$0.72	$7K	77K
2020-07-21	DIGIANDOMENICO ANTHONY	Director	Exercise (in or at the money)	101K	$0.87	$87K	382K
2020-07-15	Thornton Michael Milos	Chief Technology Officer	Exercise (in or at the money)	26K	$0.87	$23K	294K
2020-06-23	Michelon Francois Roger	Chief Executive Officer	Exercise (in or at the money)	3K	$0.87	$3K	164K
2020-06-23	Wells David R.	Chief Financial Officer	Exercise (in or at the money)	5K	$0.87	$4K	115K
2020-06-23	Harsh Michael	Director	Exercise (in or at the money)	5K	$0.87	$4K	69K
2020-06-08	DIGIANDOMENICO ANTHONY	Director	Buy	5K	$0.92	$5K	282K
2020-06-08	Michelon Francois Roger	Chief Executive Officer	Conversion	5K	$0.87	$5K	161K
2020-06-08	Thornton Michael Milos	Chief Technology Officer	Conversion	52K	$0.87	$45K	268K
2020-06-08	Wells David R.	Chief Financial Officer	Conversion	10K	$0.87	$9K	110K
2020-06-08	Harsh Michael	Director	Conversion	11K	$0.87	$10K	64K
2020-05-29	Basenese Lou	Director	Buy	10K	$0.90	$9K	99K
2020-05-28	Basenese Lou	Director	Buy	10K	$0.91	$9K	89K
2020-05-28	DIGIANDOMENICO ANTHONY	Director	Buy	5K	$0.90	$5K	277K
2020-05-27	Basenese Lou	Director	Buy	10K	$0.85	$9K	79K
2020-05-26	Basenese Lou	Director	Buy	10K	$0.82	$8K	69K
2020-05-22	DIGIANDOMENICO ANTHONY	Director	Buy	10K	$0.78	$8K	252K
2020-05-21	Basenese Lou	Director	Buy	10K	$0.71	$7K	59K
2020-04-09	Michelon Francois Roger	Chief Executive Officer	Grant	123K	$0.00	$0	156K
2020-04-09	Thornton Michael Milos	Chief Technology Officer	Grant	96K	$0.00	$0	216K
2020-04-09	Wells David R.	Chief Financial Officer	Grant	80K	$0.00	$0	100K
2020-04-09	Maloberti Renaud Bertrand	Chief Commercial Officer	Grant	87K	$0.00	$0	87K
2020-04-09	DIGIANDOMENICO ANTHONY	Director	Grant	43K	$0.00	$0	242K
2020-04-09	Harsh Michael	Director	Grant	43K	$0.00	$0	53K
2020-04-09	Tokman Alexander Y	Director	Grant	43K	$0.00	$0	43K
2020-04-09	Gambhir Sanjiv Sam	Director	Grant	43K	$0.00	$0	43K
2020-04-09	Basenese Lou	Director	Grant	42K	$0.00	$0	42K

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 NDRA worth $425K at the prices reported; 0 in the last 90 days worth $0. Latest: Anthony DiGiandomenico filed on 2026-06-25 to sell 70,822 shares ($425K) from 2026-06-26.

Filed	Seller	Shares	Market value	Of outstanding	Sale from	Broker
2026-06-25	Anthony DiGiandomenicoBoard Member	71K	$425K	5.227%	2026-06-26	MDB Capital,

Large holders (13D and 13G)

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

8 holders report 5% or more of NDRA in their latest filing, 3 on Schedule 13D (active intent). The largest reported stake is LHE LNG Holdings LLC at 15.1% of the class (254,015 shares), filed 2026-10-08 for an event on 2026-10-01.

Filed	Form	Holder	Shares	Of class	Event
2026-10-08	13D	LHE LNG Holdings LLCother entity	254K	15.1%	2026-10-01
2026-10-08	13D	ASP Isotopes Inc.corporation	254K	15.1%	2026-10-01
2026-06-29	13D/Ano. 1	Anthony DiGiandomenicoindividual	197K	9.9%	2026-06-25
2025-11-14	13G/Ano. 2	L1 Capital Global Opportunities Master Fund, Ltd.non-US institution	36K	3.0%	2025-11-14
2025-11-14	13G/Ano. 1	S.H.N. Financial Investments Ltd.non-US institution	36K	3.0%	2025-11-14
2025-10-30	13G	John Carter Lipmanindividual	115K	10.0%	2025-10-23
2025-10-28	13G	ATW Master Fund V LPpartnership	116K	9.9%	2025-10-16
2025-10-28	13G	ATW Partners Opportunities Management, LLCinvestment adviser, other entity	116K	9.9%	2025-10-16
2025-10-28	13G	Kerry Propperparent holding company, individual	116K	9.9%	2025-10-16
2025-10-28	13G	Antonio Ruiz-Gimenezparent holding company, individual	116K	9.9%	2025-10-16

13F holders

Tracked managers holding NDRA at their latest 13F. JSON

1 of the 30 tracked managers held NDRA at their latest 13F, $159K in total at quarter-end prices. Citadel Advisors is the largest at $159K (0.0% of its portfolio) as of 2026-06-30. Over the prior quarter 1 added shares and 0 cut.

Fund	Quarter	Shares	Value	Of portfolio	Change in shares
Citadel Advisors	2026-06-30	30K	$159K	0.00%	new

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.

What this page is

ENDRA Life Sciences 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 ENDRA Life Sciences (NDRA), SEC CIK 1681682, listed on Nasdaq, classified by the SEC as electromedical & electrotherapeutic apparatus. 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 2026-10-15.JSON and CSV
Daily short volume: FINRA Reg SHO daily filesSource: FINRA.Every trading day, the morning after FINRA posts it. Latest 2026-11-02.JSON and CSV
Fails to deliver: SEC fails-to-deliver dataSource: SEC.Twice a month, a few weeks after the half month ends. Latest 2026-09-03.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 2026-06-25.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 2026-10-08.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
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 2026-08-17.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 2026-03-02.JSON and CSV
Company record: EDGAR filing index for CIK 1681682Ticker, 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 electromedical & electrotherapeutic apparatus

Other company pages

Datasets

Frequently Asked Questions

How much of NDRA is sold short?

24,087 shares were held short at the 2026-10-15 settlement, 1.4 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 NDRA's daily short volume?

On 2026-11-02, 807 of the 2,103 NDRA shares reported to FINRA were sold short, 38.4% of the day's reported volume. Short volume is a flow for one day, not a position.

Does NDRA have fails to deliver?

The SEC's latest file shows 1,941 NDRA shares failed to deliver at settlement 2026-09-03. Fails are reported per settlement date and published twice a month with a lag.

Are NDRA insiders buying or selling?

No open-market insider trades were reported for NDRA in the last 90 days. The most recent filings are listed below. Latest filing: Tokman Alexander Y (Chief Executive Officer) on 2026-03-02.

Have NDRA insiders filed to sell?

Who owns 5% or more of NDRA?

Which tracked 13F managers own NDRA?

1 of the 30 tracked 13F managers held NDRA shares at their latest filing, $159K in all. The largest: Ken Griffin's Citadel Advisors (30K shares, $159K).

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