Tenon Medical (TNON)

Tenon Medical on one page: short interest, daily short volume, fails to deliver, large holders, earnings dates and insider trades. Listed on Nasdaq.

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61K

Short interest

settlement 2026-09-30

1.0

Days to cover

unchanged vs prior

53.5%

Short share of volume

2026-10-09

692,189

Fails to deliver

settlement 2026-09-14

Fri 5 Feb

Next earnings

estimated date

-$105K

Insider flow, 90 days

9 buys, 9 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 TNON is 60,789 shares, down 69,305 shares over the last month. Over the last 48 readings it ranged from 8,042 shares (14 August 2026) to 2,375,230 shares (30 June 2026). The latest reading sits at the bottom of that range. At the reported average volume of 5.5M shares a day that is 1.0 days to cover.

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Settlement	Shares short	Change	Avg daily volume	Days to cover
2026-09-30	60,789	-88.7%	5,515,981	1.00
2026-09-15	539,306	+314.6%	25,974,476	1.00
2026-08-31	130,094	+1517.7%	6,364,686	1.00
2026-08-14	8,042	-96.4%	112,734	1.00
2026-07-31	223,450	-53.6%	384,853	1.00
2026-07-15	481,214	-79.7%	8,357,039	1.00
2026-06-30	2,375,230	+826.1%	34,584,964	1.00
2026-06-15	256,462	+71.9%	100,836	2.54
2026-05-29	149,174	-15.6%	51,387	2.90
2026-05-15	176,641	-8.6%	101,048	1.75
2026-04-30	193,192	-17.6%	45,467	4.25
2026-04-15	234,577	-4.7%	126,388	1.86
2026-03-31	246,187	+28.9%	250,681	1.00
2026-03-13	191,044	-29.3%	117,120	1.63
2026-02-27	270,017	-67.7%	164,005	1.65
2026-02-13	834,878	+948.8%	5,353,136	1.00
2026-01-30	79,601	+60.0%	73,449	1.08
2026-01-15	49,745	-57.1%	73,407	1.00
2025-12-31	116,099	-25.7%	80,012	1.45
2025-12-15	156,325	-48.5%	82,656	1.89
2025-11-28	303,341	-40.2%	125,412	2.42
2025-11-14	507,242	-43.5%	138,641	3.66
2025-10-31	897,130	+82.3%	1,574,368	1.00
2025-10-15	492,207	-6.0%	207,564	2.37

Daily short volume

FINRA Reg SHO, the last 30 sessions. JSON

As of 9 October 2026, the short share of TNON volume is 53.5%, down 3.7 points over the last five sessions. Over the last 30 readings it ranged from 28.3% (24 September 2026) to 63.7% (6 October 2026). The latest reading is 4.4 points above the 30-session average of 49.0%, on 63K shares reported.

Date	Short volume	Total volume	Short share	Exempt
2026-10-09	34K	63K	53.5%	150
2026-10-08	21K	60K	35.0%	3
2026-10-07	87K	183K	47.6%	1,240
2026-10-06	116K	182K	63.7%	61
2026-10-05	96K	235K	40.8%	1,751
2026-10-02	754K	1.3M	57.2%	139,153
2026-10-01	393K	822K	47.8%	85,389
2026-09-30	20.7M	34.1M	60.7%	353,998
2026-09-29	50K	120K	41.5%	3
2026-09-28	41K	86K	47.1%	0
2026-09-25	120K	275K	43.6%	221
2026-09-24	41K	144K	28.3%	120
2026-09-23	50K	105K	47.3%	0
2026-09-22	72K	239K	30.0%	2
2026-09-21	105K	228K	46.1%	242
2026-09-18	72K	150K	48.2%	607
2026-09-17	210K	375K	56.0%	43,444
2026-09-16	614K	1.1M	55.7%	181,220
2026-09-15	2.4M	4.1M	59.5%	627,519
2026-09-14	1.3M	2.2M	58.8%	318,982
2026-09-11	25.9M	42.5M	61.0%	684,710
2026-09-10	32.0M	54.2M	59.0%	8,133,748
2026-09-09	810K	1.4M	57.0%	178,249
2026-09-08	26K	45K	56.9%	3,711
2026-09-04	17K	37K	45.9%	265
2026-09-03	29K	63K	46.7%	2,580
2026-09-02	8K	25K	32.9%	0
2026-09-01	26K	54K	49.0%	0
2026-08-31	35K	89K	39.5%	0
2026-08-28	414K	749K	55.2%	71,576

Fails to deliver

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

As of 14 September 2026, the fails-to-deliver balance in TNON is 692,189 shares, up 362,697 shares over the last settlement date. Over the last 30 readings it ranged from 7 shares (4 September 2026) to 736,968 shares (6 July 2026). The latest reading sits at the top of that range.

Settlement	Shares failed	Price	Value
2026-09-14	692,189	$5.93	$4.1M
2026-09-11	329,492	$5.30	$1.7M
2026-09-10	495,677	$2.44	$1.2M
2026-09-09	106,938	$3.36	$359K
2026-09-08	1,679	$3.72	$6K
2026-09-04	7	$3.77	$26
2026-09-03	429	$4.47	$2K
2026-09-02	7,477	$4.52	$34K
2026-09-01	5,284	$4.53	$24K
2026-08-31	95,260	$5.00	$476K
2026-08-28	776	$5.02	$4K
2026-08-26	90	$5.62	$506
2026-08-25	10,823	$6.31	$68K
2026-08-24	10,113	$6.83	$69K
2026-08-21	24,317	$7.07	$172K
2026-08-20	119,227	$11.41	$1.4M
2026-08-19	179,062	$5.45	$976K
2026-08-18	1,975	$4.92	$10K
2026-08-17	808	$5.16	$4K
2026-08-14	748	$5.96	$4K
2026-08-13	692	$5.64	$4K
2026-08-12	1,415	$6.14	$9K
2026-08-11	5,139	$6.05	$31K
2026-08-07	719	$0.17	$122
2026-08-06	792	$0.19	$150
2026-07-31	1,175	$0.20	$235
2026-07-23	4,065	$0.20	$813
2026-07-06	736,968	$0.29	$214K
2026-07-02	247,660	$0.33	$82K
2026-07-01	198,323	$0.33	$65K

Insider trades

SEC Form 4, newest first, 50 of 67 shown. JSON

Over the last 90 days TNON insiders reported 9 open-market buys ($500K) against 9 sells ($606K), so the dollar flow leans toward selling. Latest filing: HRT FINANCIAL LP (10% owner) on 2026-09-10.

Date	Insider	Title	Type	Shares	Price	Value	Owned after
2026-09-10	HRT FINANCIAL LP	10% owner	Sell	66K	$5.56	$365K	16K
2026-09-10	HRT FINANCIAL LP	10% owner	Buy	8K	$4.92	$41K	16K
2026-09-10	HRT FINANCIAL LP	10% owner	Buy	28K	$4.02	$114K	16K
2026-09-10	HRT FINANCIAL LP	10% owner	Buy	31K	$2.92	$91K	16K
2026-09-09	Williamson Kevin	Chief Financial Officer	Tax withholding	11	$3.45	$38	3K
2026-09-09	HRT FINANCIAL LP	10% owner	Sell	10K	$4.27	$42K	18K
2026-09-09	HRT FINANCIAL LP	10% owner	Buy	40K	$3.40	$134K	18K
2026-09-09	HRT FINANCIAL LP	10% owner	Sell	50K	$2.61	$132K	18K
2026-09-08	Williamson Kevin	Chief Financial Officer	Option exercise	30	$0.00	$0	3K
2026-09-08	HRT FINANCIAL LP	10% owner	Buy	707	$3.34	$2K	3K
2026-09-04	HRT FINANCIAL LP	10% owner	Sell	2K	$3.70	$6K	2K
2026-09-03	HRT FINANCIAL LP	10% owner	Buy	2K	$3.98	$7K	3K
2026-09-02	HRT FINANCIAL LP	10% owner	Sell	450	$4.53	$2K	2K
2026-09-01	HRT FINANCIAL LP	10% owner	Buy	2K	$4.57	$8K	2K
2026-08-31	HRT FINANCIAL LP	10% owner	Sell	1K	$4.66	$6K	454
2026-08-28	HRT FINANCIAL LP	10% owner	Sell	2K	$7.90	$17K	2K
2026-08-28	HRT FINANCIAL LP	10% owner	Sell	5K	$7.07	$35K	2K
2026-08-28	HRT FINANCIAL LP	10% owner	Buy	6K	$6.35	$38K	2K
2026-08-28	HRT FINANCIAL LP	10% owner	Buy	12K	$5.21	$64K	2K
2026-08-27	HRT FINANCIAL LP	10% owner	Sell	419	$4.96	$2K	10K
2026-08-03	Williamson Kevin	Chief Financial Officer	Tax withholding	13K	$0.20	$3K	90K
2026-08-03	GINN RICHARD	Chief Technology Officer	Tax withholding	45K	$0.20	$9K	167K
2026-08-03	FOSTER STEVEN M	CEO and President	Tax withholding	42K	$0.20	$8K	263K
2026-07-31	WEIGLE ROBERT K	Director	Option exercise	11K	$0.00	$0	18K
2026-07-31	Williamson Kevin	Chief Financial Officer	Option exercise	59K	$0.00	$0	103K
2026-07-31	Jacques Kristine M	Director	Option exercise	10K	$0.00	$0	21K
2026-07-31	Hochschuler Stephen	Director	Option exercise	11K	$0.00	$0	19K
2026-07-31	HOWARD IVAN	Director	Option exercise	11K	$0.00	$0	19K
2026-07-31	GINN RICHARD	Chief Technology Officer	Option exercise	127K	$0.00	$0	212K
2026-07-31	Ferrari Richard	Director	Option exercise	64K	$0.00	$0	135K
2026-07-31	FOSTER STEVEN M	CEO and President	Option exercise	141K	$0.00	$0	305K
2026-05-01	Grawey Nathaniel A.	Chief Commercial Officer	Grant	68K	$0.00	$0	244K
2026-05-01	Geist Wyatt D.	Chief Innovation Officer	Grant	136K	$0.00	$0	487K
2026-03-03	Williamson Kevin	Chief Financial Officer	Option exercise	1K	$0.00	$0	44K
2026-01-05	WEIGLE ROBERT K	Director	Tax withholding	3K	$0.93	$3K	8K
2026-01-05	Williamson Kevin	Chief Financial Officer	Tax withholding	19K	$0.93	$17K	43K
2026-01-05	Hochschuler Stephen	Director	Tax withholding	3K	$0.93	$3K	8K
2026-01-05	HOWARD IVAN	Director	Tax withholding	3K	$0.93	$3K	8K
2026-01-05	GINN RICHARD	Chief Technology Officer	Tax withholding	47K	$0.93	$44K	86K
2026-01-01	WEIGLE ROBERT K	Director	Option exercise	11K	$0.00	$0	11K
2026-01-01	Williamson Kevin	Chief Financial Officer	Option exercise	59K	$0.00	$0	61K
2026-01-01	Jacques Kristine M	Director	Option exercise	583	$0.00	$0	11K
2026-01-01	Jacques Kristine M	Director	Option exercise	10K	$0.00	$0	10K
2026-01-01	Hochschuler Stephen	Director	Option exercise	11K	$0.00	$0	11K
2026-01-01	HOWARD IVAN	Director	Option exercise	11K	$0.00	$0	12K
2026-01-01	GINN RICHARD	Chief Technology Officer	Option exercise	127K	$0.00	$0	133K
2026-01-01	Ferrari Richard	Director	Option exercise	64K	$0.00	$0	71K
2026-01-01	FOSTER STEVEN M	CEO and President	Option exercise	141K	$0.00	$0	164K
2025-11-14	Grawey Nathaniel A.	Chief Commercial Officer	Buy	101K	price not stated in the filing	not stated	239K
2025-11-14	Geist Wyatt D.	Chief Innovation Officer	Buy	19K	price not stated in the filing	not stated	158K

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.

Large holders (13D and 13G)

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

2 holders report 5% or more of TNON in their latest filing, all on Schedule 13G (passive). The largest reported stake is Armistice Capital, LLC at 10.0% of the class (54,554 shares), filed 2026-08-14 for an event on 2026-06-30.

Filed	Form	Holder	Shares	Of class	Event
2026-08-14	13G	Armistice Capital, LLCinvestment adviser, other entity	55K	10.0%	2026-06-30
2026-08-14	13G	Steven Boydparent holding company, individual	55K	10.0%	2026-06-30
2026-07-06	13G	Mitchell P. Kopinparent holding company, individual	913K	5.0%	2026-06-29
2026-07-06	13G	Daniel B. Asherparent holding company, individual	913K	5.0%	2026-06-29
2026-07-06	13G	Intracoastal Capital LLCother entity	913K	5.0%	2026-06-29

What this page is

Tenon Medical 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 Tenon Medical (TNON), SEC CIK 1560293, listed on Nasdaq. 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
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 2026-08-14.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 2026-08-13.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 2026-09-10.JSON and CSV
Company record: EDGAR filing index for CIK 1560293Ticker, 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.

Datasets

Frequently Asked Questions

How much of TNON is sold short?

60,789 shares were held short at the 2026-09-30 settlement, 1.0 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 TNON's daily short volume?

On 2026-10-09, 33,672 of the 62,975 TNON shares reported to FINRA were sold short, 53.5% of the day's reported volume. Short volume is a flow for one day, not a position.

Does TNON have fails to deliver?

The SEC's latest file shows 692,189 TNON shares failed to deliver at settlement 2026-09-14. Fails are reported per settlement date and published twice a month with a lag.

Are TNON insiders buying or selling?

Over the last 90 days TNON insiders reported 9 open-market buys ($500K) against 9 sells ($606K), so the dollar flow leans toward selling. Latest filing: HRT FINANCIAL LP (10% owner) on 2026-09-10.

Who owns 5% or more of TNON?

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

Tenon Medical (TNON)

Short interest

Daily short volume

Fails to deliver

Insider trades

Large holders (13D and 13G)

Tenon Medical in the regulatory record

Source and updates

How to read it

Other company pages

Datasets

Frequently Asked Questions