Milestone Scientific (MLSS)

Milestone Scientific on one page: short interest, daily short volume, fails to deliver, 13F holders and insider trades. Listed on NYSE, classified by the SEC as orthopedic, prosthetic & surgical appliances & supplies.

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86K

Short interest

settlement 2026-09-30

1.1

Days to cover

-0.1 days vs prior

28.4%

Short share of volume

2026-10-09

1,176

Fails to deliver

settlement 2026-09-10

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 MLSS is 86,335 shares, up 7,776 shares over the last month. Over the last 48 readings it ranged from 69,824 shares (15 November 2024) to 2,534,259 shares (30 April 2026). The latest reading sits at the bottom of that range. At the reported average volume of 78K shares a day that is 1.1 days to cover.

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Settlement	Shares short	Change	Avg daily volume	Days to cover
2026-09-30	86,335	-5.4%	78,348	1.10
2026-09-15	91,288	+16.2%	72,974	1.25
2026-08-31	78,559	-62.5%	124,982	1.00
2026-08-14	209,361	+84.5%	258,844	1.00
2026-07-31	113,456	-31.8%	112,769	1.01
2026-07-15	166,249	-36.7%	126,822	1.31
2026-06-30	262,594	+25.3%	274,995	1.00
2026-06-15	209,599	-60.4%	159,503	1.31
2026-05-29	528,755	-50.4%	234,852	2.25
2026-05-15	1,065,762	-58.0%	700,745	1.52
2026-04-30	2,534,259	+333.2%	1,375,163	1.84
2026-04-15	584,975	+622.4%	10,334,318	1.00
2026-03-31	80,981	-36.8%	256,810	1.00
2026-03-13	128,116	-22.6%	90,506	1.42
2026-02-27	165,430	-40.4%	83,153	1.99
2026-02-13	277,361	-6.9%	222,967	1.24
2026-01-30	297,988	-24.2%	316,680	1.00
2026-01-15	393,000	-25.9%	339,155	1.16
2025-12-31	530,422	-39.7%	655,607	1.00
2025-12-15	879,004	-52.9%	327,483	2.68
2025-11-28	1,866,821	-16.8%	642,590	2.91
2025-11-14	2,242,712	+1364.7%	5,787,922	1.00
2025-10-31	153,115	-1.5%	175,861	1.00
2025-10-15	155,395	-23.3%	231,716	1.00

Daily short volume

FINRA Reg SHO, the last 30 sessions. JSON

As of 9 October 2026, the short share of MLSS volume is 28.4%, down 3.6 points over the last five sessions. Over the last 30 readings it ranged from 2.3% (1 October 2026) to 68.3% (17 September 2026). The latest reading is in line with the 30-session average of 28.8%, on 33K shares reported.

Date	Short volume	Total volume	Short share	Exempt
2026-10-09	9K	33K	28.4%	2,400
2026-10-08	10K	34K	30.2%	0
2026-10-07	2K	20K	10.6%	0
2026-10-06	6K	44K	14.1%	0
2026-10-05	64K	201K	32.0%	18
2026-10-02	76K	236K	32.0%	300
2026-10-01	225	10K	2.3%	0
2026-09-30	6K	10K	66.5%	0
2026-09-29	26K	104K	25.1%	0
2026-09-28	3K	22K	13.8%	500
2026-09-25	3K	8K	33.9%	38
2026-09-24	2K	22K	11.5%	100
2026-09-23	3K	22K	13.2%	0
2026-09-22	53K	86K	61.4%	0
2026-09-21	7K	61K	12.0%	0
2026-09-18	4K	43K	10.0%	0
2026-09-17	42K	62K	68.3%	0
2026-09-16	22K	50K	44.0%	0
2026-09-15	2K	9K	17.5%	0
2026-09-14	3K	14K	18.3%	0
2026-09-11	13K	33K	38.7%	0
2026-09-10	28K	89K	30.9%	0
2026-09-09	12K	79K	15.2%	0
2026-09-08	21K	57K	36.2%	0
2026-09-04	2K	29K	8.6%	0
2026-09-03	23K	38K	60.1%	0
2026-09-02	19K	48K	40.2%	0
2026-09-01	14K	44K	31.4%	0
2026-08-31	5K	15K	36.9%	0
2026-08-28	3K	13K	21.9%	0

Fails to deliver

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

As of 10 September 2026, the fails-to-deliver balance in MLSS is 1,176 shares, up 730 shares over the last settlement date. Over the last 30 readings it ranged from 19 shares (7 August 2026) to 4,292,594 shares (16 April 2026). The latest reading sits at the bottom of that range.

Settlement	Shares failed	Price	Value
2026-09-10	1,176	$0.42	$494
2026-08-20	446	$0.47	$210
2026-08-14	22,620	$0.55	$12K
2026-08-13	257	$0.53	$136
2026-08-07	19	$0.47	$9
2026-08-03	9,048	$0.40	$4K
2026-06-30	1,524	$0.32	$488
2026-06-09	469	$0.38	$178
2026-06-03	61,461	$0.39	$24K
2026-05-19	177	$0.33	$58
2026-05-15	19,956	$0.34	$7K
2026-05-06	42,422	$0.40	$17K
2026-05-04	29,351	$0.34	$10K
2026-04-28	48,453	$0.34	$16K
2026-04-27	857	$0.32	$274
2026-04-24	124	$0.32	$40
2026-04-22	51,652	$0.32	$17K
2026-04-21	1,347	$0.29	$391
2026-04-17	387,862	$0.27	$105K
2026-04-16	4,292,594	$0.27	$1.2M
2026-04-15	104,005	$0.29	$30K
2026-02-06	1,352	$0.26	$352
2026-01-09	397	$0.29	$115
2025-12-30	4,152	$0.29	$1K
2025-12-24	1,929	$0.29	$559
2025-12-16	427	$0.35	$149
2025-12-15	25,981	$0.39	$10K
2025-12-12	696	$0.36	$251
2025-12-11	230	$0.34	$78
2025-12-08	9,611	$0.35	$3K

Insider trades

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

No open-market insider trades were reported for MLSS in the last 90 days. The most recent filings are listed below. Latest filing: BP4 S.r.l. (10% owner) on 2025-10-24.

Date	Insider	Title	Type	Shares	Price	Value	Owned after
2025-10-24	BP4 S.r.l.	10% owner	Sell	100K	$0.44	$44K	8.9M
2025-10-23	BP4 S.r.l.	10% owner	Sell	80K	$0.43	$34K	9.0M
2025-10-22	BP4 S.r.l.	10% owner	Sell	14K	$0.45	$6K	9.1M
2025-10-21	BP4 S.r.l.	10% owner	Sell	40K	$0.44	$18K	9.1M
2025-10-20	BP4 S.r.l.	10% owner	Sell	24K	$0.45	$11K	9.1M
2025-10-14	BP4 S.r.l.	10% owner	Sell	30K	$0.54	$16K	9.2M
2025-10-13	BP4 S.r.l.	10% owner	Sell	10K	$0.55	$6K	9.2M
2025-10-10	BP4 S.r.l.	10% owner	Sell	10K	$0.55	$6K	9.2M
2025-10-08	BP4 S.r.l.	10% owner	Sell	30K	$0.47	$14K	9.2M
2025-10-07	BP4 S.r.l.	10% owner	Sell	10K	$0.45	$5K	9.2M
2025-10-03	BP4 S.r.l.	10% owner	Sell	10K	$0.45	$5K	9.2M
2025-10-03	BP4 S.r.l.	10% owner	Sell	9K	$0.45	$4K	9.2M
2025-09-11	BP4 S.r.l.	10% owner	Sell	10K	$0.59	$6K	9.3M
2025-07-17	BP4 S.r.l.	10% owner	Sell	10K	$0.64	$6K	9.3M
2025-07-08	BP4 S.r.l.	10% owner	Sell	11K	$0.69	$8K	9.3M
2025-07-07	BP4 S.r.l.	10% owner	Sell	31K	$0.68	$21K	9.3M
2025-07-03	BP4 S.r.l.	10% owner	Sell	51K	$0.67	$34K	9.4M
2025-06-30	BP4 S.r.l.	10% owner	Sell	649	$0.65	$422	9.4M
2025-06-27	BP4 S.r.l.	10% owner	Sell	10K	$0.73	$7K	9.4M
2025-06-25	BP4 S.r.l.	10% owner	Sell	1K	$0.77	$1K	9.4M
2025-06-24	BP4 S.r.l.	10% owner	Sell	10K	$0.81	$8K	9.4M
2025-06-23	BP4 S.r.l.	10% owner	Sell	6K	$0.86	$5K	9.4M
2025-06-18	BP4 S.r.l.	10% owner	Sell	2K	$0.88	$1K	9.4M
2025-06-16	BP4 S.r.l.	10% owner	Sell	10K	$0.90	$9K	9.4M
2025-06-11	BP4 S.r.l.	10% owner	Sell	24K	$0.90	$21K	9.5M
2025-06-10	BP4 S.r.l.	TenPercentOwner	Sell	30K	$0.91	$27K	9.5M
2025-06-09	BP4 S.r.l.	TenPercentOwner	Sell	20K	$0.91	$18K	9.5M
2025-06-06	BP4 S.r.l.	TenPercentOwner	Sell	60K	$0.90	$54K	9.5M
2025-06-05	BP4 S.r.l.	TenPercentOwner	Sell	27K	$0.91	$24K	9.6M
2025-06-04	BP4 S.r.l.	TenPercentOwner	Sell	6K	$0.91	$5K	9.6M
2025-06-03	BP4 S.r.l.	TenPercentOwner	Sell	8K	$0.94	$8K	9.6M
2025-06-02	BP4 S.r.l.	TenPercentOwner	Sell	10K	$0.95	$10K	9.6M
2025-05-30	BP4 S.r.l.	TenPercentOwner	Sell	12K	$0.93	$11K	9.6M
2025-05-29	BP4 S.r.l.	TenPercentOwner	Sell	3K	$0.96	$3K	9.7M
2025-05-28	BP4 S.r.l.	TenPercentOwner	Sell	14K	$0.96	$14K	9.7M
2024-12-19	McGeehan Michael	Director	Sell	20K	$0.78	$16K	575K
2024-10-22	OSSER LEONARD	Director	Sell	108K	$0.93	$100K	4.6M
2024-09-24	McGeehan Michael	Director	Sell	209	$1.00	$209	595K
2024-09-20	McGeehan Michael	Director	Sell	2K	$1.00	$2K	594K
2024-09-19	McGeehan Michael	Director	Sell	1K	$1.00	$1K	595K
2024-08-28	Trombetta Giandomenico	Director	Grant	112K	$0.89	$100K	10.4M
2024-08-28	OSSER LEONARD	Director	Grant	112K	$0.89	$100K	4.7M
2024-08-28	GOLDMAN NEAL I	Director	Grant	135K	$0.89	$120K	1.9M
2024-08-28	McGeehan Michael	Director	Grant	124K	$0.89	$110K	596K
2024-08-28	CASAMENTO BENEDETTA I	Director	Grant	135K	$0.89	$120K	404K
2024-08-21	OSSER LEONARD	Director	Sell	142K	$0.95	$135K	4.6M
2024-04-23	GOLDMAN NEAL I	Director	Grant	22K	$0.55	$12K	1.8M
2024-04-22	GOLDMAN NEAL I	Director	Grant	56K	$0.54	$30K	1.7M
2023-12-11	GOLDMAN NEAL I	Director	Grant	125K	$0.63	$79K	1.7M
2023-10-23	Trombetta Giandomenico	Director	Disposition	1K	$0.97	$1K	10.3M

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.

13F holders

Tracked managers holding MLSS at their latest 13F. JSON

1 of the 30 tracked managers held MLSS at their latest 13F, $18K in total at quarter-end prices. Renaissance Technologies is the largest at $18K (0.0% of its portfolio) as of 2026-06-30. Over the prior quarter 0 added shares and 1 cut.

Fund	Quarter	Shares	Value	Of portfolio	Change in shares
Renaissance Technologies	2026-06-30	56K	$18K	0.00%	-26K

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

Milestone Scientific 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 Milestone Scientific (MLSS), SEC CIK 855683, listed on NYSE, classified by the SEC as orthopedic, prosthetic & surgical appliances & supplies. 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 2026-09-10.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
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 2025-10-24.JSON and CSV
Company record: EDGAR filing index for CIK 855683Ticker, 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 orthopedic, prosthetic & surgical appliances & supplies

Other company pages

Datasets

Frequently Asked Questions

How much of MLSS is sold short?

86,335 shares were held short at the 2026-09-30 settlement, 1.1 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 MLSS's daily short volume?

On 2026-10-09, 9,305 of the 32,760 MLSS shares reported to FINRA were sold short, 28.4% of the day's reported volume. Short volume is a flow for one day, not a position.

Does MLSS have fails to deliver?

The SEC's latest file shows 1,176 MLSS shares failed to deliver at settlement 2026-09-10. Fails are reported per settlement date and published twice a month with a lag.

Are MLSS insiders buying or selling?

No open-market insider trades were reported for MLSS in the last 90 days. The most recent filings are listed below. Latest filing: BP4 S.r.l. (10% owner) on 2025-10-24.

Which tracked 13F managers own MLSS?

1 of the 30 tracked 13F managers held MLSS shares at their latest filing, $18K in all. The largest: Renaissance Technologies (56K shares, $18K).

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