Valion Bio (VBIO)

Valion Bio on one page: short interest, daily short volume, fails to deliver, large holders, 13F holders, earnings dates and insider trades. Listed on Nasdaq.

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88K

Short interest

settlement 2026-09-30

1.0

Days to cover

unchanged vs prior

13.3%

Short share of volume

2026-10-23

5,055

Fails to deliver

settlement 2026-09-30

Fri 13 Nov

Next earnings

estimated date

Insider flow, 90 days

0 buys, 0 sells

As of 2026-10-23.

Short interest

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

As of 30 September 2026, short interest in VBIO is 87,968 shares, down 252,218 shares over the last month. Over the last 48 readings it ranged from 1 share (13 August 2021) to 1,646,299 shares (14 August 2026). The latest reading sits at the bottom of that range. At the reported average volume of 6.0M 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	87,968	+128.9%	5,958,426	1.00
2026-09-15	38,427	-88.7%	136,492	1.00
2026-08-31	340,186	-79.3%	786,030	1.00
2026-08-14	1,646,299	+96.5%	33,615,368	1.00
2026-07-31	837,868	+217.5%	1,312,092	1.00
2026-07-15	263,890	+70.0%	201,032	1.31
2026-06-30	155,235	-40.4%	252,050	1.00
2026-06-15	260,360	+73.8%	693,061	1.00
2026-05-29	149,795	-26.3%	76,109	1.97
2026-05-15	203,277	-17.3%	336,770	1.00
2026-04-30	245,772	+284.5%	325,146	1.00
2021-09-30	713	-93.7%	233,254	1.00
2021-09-15	11,380	-0.7%	243,495	1.00
2021-08-31	11,463	+1146200.0%	189,050	1.00
2021-08-13	1	+100.0%	283,385	1.00
2021-07-15	25,000	+977.1%	330,538	1.00
2021-06-30	2,321	+3364.2%	129,737	1.00
2021-06-15	67	+100.0%	84,916	1.00
2021-05-14	630	+100.0%	49,185	1.00
2021-04-15	4,784	+100.0%	34,986	1.00
2021-03-15	1,755	+288.3%	70,094	1.00
2021-02-26	452	+0.0%	47,609	1.00
2021-01-29	452	-92.9%	43,646	1.00
2021-01-15	6,328	+1300.0%	39,701	1.00
2020-12-31	452	-80.3%	121,535	1.00
2020-12-15	2,297	+408.2%	43,380	1.00
2020-11-30	452	+0.0%	27,518	1.00
2020-11-13	452	+0.0%	24,237	1.00
2020-10-30	452	+0.0%	22,057	1.00
2020-10-15	452	+0.0%	12,971	1.00
2020-09-30	452	+0.0%	13,055	1.00
2020-09-15	452	-0.2%	36,028	1.00
2020-08-31	453	+0.2%	34,051	1.00
2020-08-14	452	+0.0%	42,616	1.00
2020-07-31	452	+0.0%	28,875	1.00
2020-07-15	452	-53.1%	29,138	1.00
2020-06-30	964	-89.4%	40,421	1.00
2020-06-15	9,099	+1913.0%	60,296	1.00
2020-05-29	452	+0.0%	68,642	1.00
2020-05-15	452	-61.7%	17,592	1.00
2020-04-30	1,181	-79.7%	35,355	1.00
2020-04-15	5,829	+626.8%	55,541	1.00
2020-03-31	802	+0.0%	26,539	1.00
2020-03-13	802	+0.0%	83,896	1.00
2020-02-28	802	-0.1%	157,891	1.00
2020-02-14	803	-92.9%	10,603	1.00
2020-01-31	11,303	-57.0%	39,820	1.00
2020-01-15	26,303	+0.0%	29,516	1.00

Daily short volume

FINRA Reg SHO, the last 30 sessions. JSON

As of 23 October 2026, the short share of VBIO volume is 13.3%, down 4.3 points over the last five sessions. Over the last 30 readings it ranged from 13.3% (23 October 2026) to 78.9% (21 September 2026). The latest reading sits at the bottom of that range. The latest reading is 31.2 points below the 30-session average of 44.5%, on 16K shares reported.

Date	Short volume	Total volume	Short share	Exempt
2026-10-23	2K	16K	13.3%	0
2026-10-22	12K	75K	16.7%	0
2026-10-21	23K	78K	30.0%	0
2026-10-20	16K	31K	49.7%	5,112
2026-10-19	19K	82K	22.9%	2,700
2026-10-16	22K	123K	17.6%	2,031
2026-10-15	338K	984K	34.4%	45,181
2026-10-14	29K	49K	60.0%	11,069
2026-10-13	38K	104K	36.5%	18,334
2026-10-12	59K	152K	38.8%	5,672
2026-10-09	29K	56K	52.3%	0
2026-10-08	34K	73K	46.5%	0
2026-10-07	22K	61K	36.2%	0
2026-10-06	23K	59K	38.7%	5,338
2026-10-05	49K	128K	38.4%	13,128
2026-10-02	87K	128K	67.7%	21,139
2026-10-01	180K	350K	51.5%	43,105
2026-09-30	7.8M	12.9M	60.4%	1,816,758
2026-09-29	146K	221K	65.8%	19,428
2026-09-28	48K	111K	43.1%	15,520
2026-09-25	274K	437K	62.7%	86,405
2026-09-24	1.7M	3.0M	55.2%	345,081
2026-09-23	735K	1.4M	53.3%	10,982
2026-09-22	158K	294K	53.6%	0
2026-09-21	59K	75K	78.9%	0
2026-09-18	13K	35K	36.6%	0
2026-09-17	59K	116K	50.5%	0
2026-09-16	25K	49K	51.8%	0
2026-09-15	4K	13K	31.8%	0
2026-09-14	38K	93K	40.6%	0

Fails to deliver

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

As of 30 September 2026, the fails-to-deliver balance in VBIO is 5,055 shares, up 1,047 shares over the last settlement date. Over the last 30 readings it ranged from 6 shares (8 September 2026) to 12,648,615 shares (13 August 2026). The latest reading sits at the bottom of that range.

Settlement	Shares failed	Price	Value
2026-09-30	5,055	$2.83	$14K
2026-09-29	4,008	$2.70	$11K
2026-09-28	18,065	$3.03	$55K
2026-09-25	82,866	$3.48	$288K
2026-09-24	13,658	$2.73	$37K
2026-09-23	7,910	$2.49	$20K
2026-09-21	1,064	$2.12	$2K
2026-09-14	5,233	$2.26	$12K
2026-09-10	161	$2.40	$386
2026-09-08	6	$2.77	$17
2026-09-04	12	$2.80	$34
2026-09-03	4,121	$3.12	$13K
2026-09-02	861	$3.07	$3K
2026-09-01	4,254	$3.57	$15K
2026-08-27	9,687	$0.16	$2K
2026-08-26	252,838	$0.16	$40K
2026-08-25	406,108	$0.17	$69K
2026-08-24	5,010	$0.12	$601
2026-08-20	134,092	$0.13	$17K
2026-08-19	115,194	$0.16	$18K
2026-08-18	689,626	$0.18	$124K
2026-08-17	1,107,492	$0.19	$210K
2026-08-14	119,094	$0.17	$20K
2026-08-13	12,648,615	$0.23	$2.9M
2026-08-12	21,933	$0.31	$7K
2026-08-11	87,651	$0.29	$25K
2026-08-10	151,570	$0.29	$44K
2026-08-07	255,813	$0.27	$69K
2026-08-06	224,739	$0.29	$65K
2026-08-05	236,035	$0.33	$78K

Insider trades

SEC Form 4, newest first. JSON

No open-market insider trades were reported for VBIO in the last 90 days. The most recent filings are listed below. Latest filing: Wolf Lisa G (COO & CFO) on 2026-09-18.

Date	Insider	Title	Type	Shares	Price	Value	Owned after
2026-09-18	Wolf Lisa G	COO & CFO	Tax withholding	2	$2.12	$4	27
2026-09-18	Wolf Lisa G	COO & CFO	Exercise or conversion	4	price not stated in the filing	not stated	29
2026-06-18	Wolf Lisa G	Chief Financial Officer	Exercise or conversion	92	price not stated in the filing	not stated	618
2026-05-18	Handley Michael K	Chief Executive Officer	Exercise or conversion	2K	price not stated in the filing	not stated	11K

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

13 holders report 5% or more of VBIO in their latest filing, all on Schedule 13G (passive). The largest reported stake is NOMIS BAY LTD. at 10.0% of the class (440,242 shares), filed 2026-07-17 for an event on 2026-06-08.

Filed	Form	Holder	Shares	Of class	Event
2026-09-04	13G/Ano. 2	3i, LPpartnership	133K	9.9%	2026-09-04
2026-09-04	13G/Ano. 2	3i Management LLCother entity	133K	9.9%	2026-09-04
2026-09-04	13G/Ano. 2	Maier J. Tarlowindividual	133K	9.9%	2026-09-04
2026-09-04	13G/Ano. 2	Tumim Stone Capital, LLCother entity	0	0.0%	2026-09-04
2026-07-17	13G	NOMIS BAY LTD.corporation	440K	10.0%	2026-06-08
2026-07-17	13G	NOMIS BAY OPPORTUNITY LTD.corporation	440K	10.0%	2026-06-08
2026-07-17	13G	EOM Management Ltd.investment adviser, corporation	440K	10.0%	2026-06-08
2026-07-17	13G	Jason Jagessarindividual	440K	10.0%	2026-06-08
2026-07-17	13G	Chaja Carlebachparent holding company, individual	440K	10.0%	2026-06-08
2026-07-17	13G	James Keyesindividual	440K	10.0%	2026-06-08
2026-07-17	13G	Murchinson Ltd.investment adviser, corporation	440K	10.0%	2026-06-08
2026-07-17	13G	Marc Bistricerparent holding company, individual	440K	10.0%	2026-06-08
2026-07-17	13G	BPY Ltd.corporation	440K	10.0%	2026-06-08
2026-05-08	13G/Ano. 1	Maier Joshua Tarlowindividual	308K	9.9%	2026-03-31

13F holders

Tracked managers holding VBIO at their latest 13F. JSON

1 of the 30 tracked managers held VBIO at their latest 13F, $39K in total at quarter-end prices. Citadel Advisors is the largest at $39K (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	74K	$39K	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

Valion Bio 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 Valion Bio (VBIO), SEC CIK 1787740, 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 2026-10-23.JSON and CSV
Fails to deliver: SEC fails-to-deliver dataSource: SEC.Twice a month, a few weeks after the half month ends. Latest 2026-09-30.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 2026-09-04.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 2026-05-14.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 2026-09-18.JSON and CSV
Company record: EDGAR filing index for CIK 1787740Ticker, 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 VBIO is sold short?

87,968 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 VBIO's daily short volume?

On 2026-10-23, 2,126 of the 15,952 VBIO shares reported to FINRA were sold short, 13.3% of the day's reported volume. Short volume is a flow for one day, not a position.

Does VBIO have fails to deliver?

The SEC's latest file shows 5,055 VBIO shares failed to deliver at settlement 2026-09-30. Fails are reported per settlement date and published twice a month with a lag.

Are VBIO insiders buying or selling?

No open-market insider trades were reported for VBIO in the last 90 days. The most recent filings are listed below. Latest filing: Wolf Lisa G (COO & CFO) on 2026-09-18.

Who owns 5% or more of VBIO?

Which tracked 13F managers own VBIO?

1 of the 30 tracked 13F managers held VBIO shares at their latest filing, $39K in all. The largest: Ken Griffin's Citadel Advisors (74K shares, $39K).

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

Valion Bio (VBIO)

Short interest

Daily short volume

Fails to deliver

Insider trades

Large holders (13D and 13G)

13F holders

Valion Bio in the regulatory record

Source and updates

How to read it

Other company pages

Datasets

Frequently Asked Questions