Senseonics Holdings (SENS)

Senseonics Holdings on one page: short interest, daily short volume, fails to deliver, large holders, 13F holders, earnings dates and insider trades. Listed on Nasdaq, classified by the SEC as industrial instruments for measurement, display, and control.

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5.4M

Short interest

settlement 2026-09-30

6.3

Days to cover

-2.2 days vs prior

49.7%

Short share of volume

2026-10-09

2,639

Fails to deliver

settlement 2026-09-09

Wed 4 Nov

Next earnings

estimated date

$125K

Insider flow, 90 days

1 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 SENS is 5,370,986 shares, up 158,727 shares over the last month. Over the last 48 readings it ranged from 3,173,941 shares (31 October 2025) to 53,376,281 shares (15 October 2025). The latest reading sits at the bottom of that range. At the reported average volume of 848K shares a day that is 6.3 days to cover.

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Settlement	Shares short	Change	Avg daily volume	Days to cover
2026-09-30	5,370,986	+6.3%	847,516	6.34
2026-09-15	5,054,139	-3.0%	592,553	8.53
2026-08-31	5,212,259	-10.9%	685,399	7.60
2026-08-14	5,849,921	-5.1%	911,051	6.42
2026-07-31	6,164,385	-3.9%	422,853	14.58
2026-07-15	6,416,134	+10.9%	626,478	10.24
2026-06-30	5,786,701	+20.2%	1,179,451	4.91
2026-06-15	4,814,466	+4.7%	568,749	8.47
2026-05-29	4,598,226	-10.3%	524,498	8.77
2026-05-15	5,125,035	-2.3%	2,039,680	2.51
2026-04-30	5,246,497	+9.4%	306,483	17.12
2026-04-15	4,795,095	+6.3%	280,978	17.07
2026-03-31	4,512,874	-6.9%	406,553	11.10
2026-03-13	4,849,492	+7.4%	695,008	6.98
2026-02-27	4,517,223	-5.4%	314,667	14.36
2026-02-13	4,775,274	+11.8%	606,290	7.88
2026-01-30	4,269,208	+5.3%	483,185	8.84
2026-01-15	4,053,212	+8.9%	387,705	10.45
2025-12-31	3,723,009	+2.7%	544,193	6.84
2025-12-15	3,624,832	-1.6%	313,839	11.55
2025-11-28	3,685,234	+3.5%	425,247	8.67
2025-11-14	3,560,314	+12.2%	493,500	7.21
2025-10-31	3,173,941	-94.0%	641,190	4.95
2025-10-15	53,376,281	+5.7%	13,819,798	3.86

Daily short volume

FINRA Reg SHO, the last 30 sessions. JSON

As of 9 October 2026, the short share of SENS volume is 49.7%, down 8.3 points over the last five sessions. Over the last 30 readings it ranged from 31.8% (1 September 2026) to 79.6% (14 September 2026). The latest reading is 2.1 points below the 30-session average of 51.9%, on 179K shares reported.

Date	Short volume	Total volume	Short share	Exempt
2026-10-09	89K	179K	49.7%	0
2026-10-08	168K	345K	48.7%	1,000
2026-10-07	129K	209K	61.9%	2,300
2026-10-06	112K	208K	53.8%	132
2026-10-05	118K	224K	52.6%	313
2026-10-02	164K	283K	58.1%	80
2026-10-01	144K	201K	71.6%	18
2026-09-30	131K	254K	51.8%	0
2026-09-29	135K	206K	65.3%	107
2026-09-28	74K	182K	40.6%	503
2026-09-25	84K	234K	36.0%	420
2026-09-24	145K	377K	38.5%	251
2026-09-23	112K	241K	46.6%	115
2026-09-22	108K	240K	44.9%	2,974
2026-09-21	159K	299K	53.2%	193
2026-09-18	114K	233K	48.9%	86
2026-09-17	280K	436K	64.3%	5
2026-09-16	127K	278K	45.7%	0
2026-09-15	76K	139K	54.7%	12
2026-09-14	192K	241K	79.6%	5
2026-09-11	77K	146K	52.8%	67
2026-09-10	126K	188K	67.2%	8,838
2026-09-09	154K	294K	52.4%	7
2026-09-08	174K	264K	65.8%	9
2026-09-04	86K	198K	43.5%	774
2026-09-03	236K	374K	63.1%	5,999
2026-09-02	136K	347K	39.3%	0
2026-09-01	128K	403K	31.8%	0
2026-08-31	44K	130K	33.6%	0
2026-08-28	61K	150K	40.5%	5

Fails to deliver

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

As of 9 September 2026, the fails-to-deliver balance in SENS is 2,639 shares, up 2,609 shares over the last settlement date. Over the last 30 readings it ranged from 4 shares (8 June 2026) to 61,427 shares (2 June 2026). The latest reading sits at the bottom of that range.

Settlement	Shares failed	Price	Value
2026-09-09	2,639	$9.33	$25K
2026-09-08	30	$9.63	$289
2026-09-04	7,900	$9.90	$78K
2026-08-31	1,475	$9.33	$14K
2026-08-28	4,390	$9.40	$41K
2026-08-27	1,629	$9.34	$15K
2026-08-26	1,682	$9.52	$16K
2026-08-25	1,880	$9.38	$18K
2026-08-24	5,520	$9.71	$54K
2026-08-21	6,534	$8.82	$58K
2026-08-14	14	$7.73	$108
2026-08-13	578	$7.93	$5K
2026-08-12	562	$7.87	$4K
2026-08-11	63	$7.54	$475
2026-08-06	17,579	$5.18	$91K
2026-08-03	19,820	$5.03	$100K
2026-07-29	2,893	$4.91	$14K
2026-07-17	45	$5.14	$231
2026-07-13	10,040	$5.38	$54K
2026-06-25	6,285	$5.70	$36K
2026-06-17	586	$7.23	$4K
2026-06-15	1,215	$7.18	$9K
2026-06-12	75	$7.33	$550
2026-06-10	17,818	$7.43	$132K
2026-06-09	2,059	$7.13	$15K
2026-06-08	4	$6.67	$27
2026-06-02	61,427	$6.84	$420K
2026-06-01	1,429	$6.79	$10K
2026-05-29	12,667	$6.72	$85K
2026-05-22	213	$6.16	$1K

Insider trades

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

Insiders at SENS reported 1 open-market buy worth $125K in the last 90 days and no open-market sells. Latest filing: Steven Edelman (Director) on 2026-10-01.

Date	Insider	Title	Type	Shares	Price	Value	Owned after
2026-10-01	Steven Edelman	Director	Grant	1K	$9.96	$13K	92K
2026-10-01	ROEDER DOUGLAS A	Director	Grant	1K	$9.96	$15K	173K
2026-10-01	Prince Douglas S	Director	Grant	815	$9.96	$8K	70K
2026-10-01	Fiorentino Edward	Director	Grant	1K	$9.96	$14K	87K
2026-08-19	ROEDER DOUGLAS A	Director	Buy	14K	$8.98	$125K	171K
2026-07-01	Steven Edelman	Director	Grant	2K	$5.36	$13K	91K
2026-07-01	ROEDER DOUGLAS A	Director	Grant	3K	$5.36	$15K	157K
2026-07-01	Prince Douglas S	Director	Grant	2K	$5.36	$8K	69K
2026-07-01	Fiorentino Edward	Director	Grant	3K	$5.36	$14K	86K
2026-06-15	Goodnow Timothy T	President and CEO	Tax withholding	33K	$7.18	$234K	1.1M
2026-06-15	HANSEN BRIAN B	Chief Commercial Officer	Tax withholding	5K	$7.18	$39K	127K
2026-06-15	Horton Kenneth L	GC & Corp. Development Advisor	Tax withholding	10K	$7.18	$69K	286K
2026-06-15	JAIN Mukul	Chief Operating Officer	Tax withholding	16K	$7.18	$116K	501K
2026-06-15	Kaufman Francine	Chief Medical Officer	Tax withholding	4K	$7.18	$29K	177K
2026-06-15	Sullivan Frederick T.	Chief Financial Officer	Tax withholding	5K	$7.18	$39K	226K
2026-05-20	Steven Edelman	Director	Grant	10K	$0.00	$0	89K
2026-05-20	ROEDER DOUGLAS A	Director	Grant	10K	$0.00	$0	154K
2026-05-20	Prince Douglas S	Director	Grant	10K	$0.00	$0	68K
2026-05-20	Larkin Sharon	Director	Grant	10K	$0.00	$0	42K
2026-05-20	Fiorentino Edward	Director	Grant	10K	$0.00	$0	83K
2026-05-20	DeFalco Stephen P	Director	Grant	10K	$0.00	$0	111K
2026-05-19	Sullivan Frederick T.	Chief Financial Officer	Grant	90K	$0.00	$0	232K
2026-05-19	Kaufman Francine	Chief Medical Officer	Grant	63K	$0.00	$0	181K
2026-05-19	JAIN Mukul	Chief Operating Officer	Grant	271K	$0.00	$0	517K
2026-05-19	Horton Kenneth L	GC & Corp. Development Advisor	Grant	158K	$0.00	$0	295K
2026-05-19	HANSEN BRIAN B	Chief Commercial Officer	Grant	90K	$0.00	$0	132K
2026-05-19	Goodnow Timothy T	President and CEO	Grant	554K	$0.00	$0	1.2M
2026-05-15	Sullivan Frederick T.	Chief Financial Officer	Tax withholding	9K	$5.82	$52K	142K
2026-05-15	Kaufman Francine	Chief Medical Officer	Tax withholding	6K	$5.82	$35K	118K
2026-05-15	JAIN Mukul	Chief Operating Officer	Tax withholding	14K	$5.82	$80K	246K
2026-05-15	Horton Kenneth L	GC & Corp. Development Advisor	Tax withholding	7K	$5.82	$43K	137K
2026-05-15	Goodnow Timothy T	President and CEO	Tax withholding	29K	$5.82	$166K	623K
2026-05-12	ROEDER DOUGLAS A	Director	Buy	23K	$5.56	$126K	145K
2026-04-01	Steven Edelman	Director	Grant	2K	$6.65	$13K	79K
2026-04-01	ROEDER DOUGLAS A	Director	Grant	2K	$6.65	$15K	122K
2026-04-01	Prince Douglas S	Director	Grant	1K	$6.65	$8K	58K
2026-04-01	Fiorentino Edward	Director	Grant	2K	$6.65	$14K	73K
2026-03-13	ROEDER DOUGLAS A	Director	Buy	18K	$5.73	$100K	120K
2026-03-13	Goodnow Timothy T	President and CEO	Buy	17K	$5.79	$100K	651K
2026-01-02	Steven Edelman	Director	Grant	2K	$5.89	$13K	77K
2026-01-02	ROEDER DOUGLAS A	Director	Grant	3K	$5.89	$15K	102K
2026-01-02	Prince Douglas S	Director	Grant	1K	$5.89	$8K	57K
2026-01-02	Fiorentino Edward	Director	Grant	2K	$5.89	$14K	71K
2025-11-15	Sullivan Frederick T.	Chief Financial Officer	Tax withholding	6K	$6.26	$40K	151K
2025-11-15	Kaufman Francine	Chief Medical Officer	Tax withholding	5K	$6.26	$29K	124K
2025-11-15	JAIN Mukul	Chief Operating Officer	Tax withholding	10K	$6.26	$65K	260K
2025-11-15	Horton Kenneth L	GC & Corp. Development Advisor	Tax withholding	6K	$6.26	$38K	144K
2025-11-15	Goodnow Timothy T	President and CEO	Tax withholding	27K	$6.26	$169K	634K
2025-11-10	Steven Edelman	Director	Buy	10K	$6.55	$66K	75K
2025-11-07	Sullivan Frederick T.	Chief Financial Officer	Buy	5K	$5.88	$32K	157K

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

3 holders report 5% or more of SENS in their latest filing, all on Schedule 13G (passive). The largest reported stake is Sessa Capital IM, L.P. at 9.9% of the class (12,437,532 shares), filed 2026-08-14 for an event on 2026-06-30.

Filed	Form	Holder	Shares	Of class	Event
2026-08-14	13G	Sessa Capital IM, L.P.investment adviser, partnership	12.4M	9.9%	2026-06-30
2026-08-14	13G	John Petryparent holding company, individual	12.4M	9.9%	2026-06-30
2026-07-30	13G	BlackRock, Inc.parent holding company	2.8M	6.6%	2026-06-30

13F holders

Tracked managers holding SENS at their latest 13F. JSON

3 of the 30 tracked managers held SENS at their latest 13F, $746K in total at quarter-end prices. Millennium Management is the largest at $450K (0.0% of its portfolio) as of 2026-06-30. Over the prior quarter 1 added shares and 2 cut.

Fund	Quarter	Shares	Value	Of portfolio	Change in shares
Millennium Management	2026-06-30	79K	$450K	0.00%	-481K
Citadel Advisors	2026-06-30	34K	$192K	0.00%	-43K
Two Sigma Investments	2026-06-30	18K	$104K	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

Senseonics Holdings 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 Senseonics Holdings (SENS), SEC CIK 1616543, listed on Nasdaq, classified by the SEC as industrial instruments for measurement, display, and control. 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 2026-09-09.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
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 2026-08-06.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 2026-10-01.JSON and CSV
Company record: EDGAR filing index for CIK 1616543Ticker, 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 industrial instruments for measurement, display, and control

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Datasets

Frequently Asked Questions

How much of SENS is sold short?

5,370,986 shares were held short at the 2026-09-30 settlement, 6.3 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 SENS's daily short volume?

On 2026-10-09, 89,030 of the 178,979 SENS shares reported to FINRA were sold short, 49.7% of the day's reported volume. Short volume is a flow for one day, not a position.

Does SENS have fails to deliver?

The SEC's latest file shows 2,639 SENS shares failed to deliver at settlement 2026-09-09. Fails are reported per settlement date and published twice a month with a lag.

Are SENS insiders buying or selling?

Insiders at SENS reported 1 open-market buy worth $125K in the last 90 days and no open-market sells. Latest filing: Steven Edelman (Director) on 2026-10-01.

Who owns 5% or more of SENS?

Which tracked 13F managers own SENS?

3 of the 30 tracked 13F managers held SENS shares at their latest filing, $746K in all. The largest: Izzy Englander's Millennium Management (79K shares, $450K), Ken Griffin's Citadel Advisors (34K shares, $192K), Two Sigma Investments (18K shares, $104K).

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