Xenetic Biosciences (XBIO)

Xenetic Biosciences 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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11K

Short interest

settlement 2026-10-15

1.0

Days to cover

unchanged vs prior

34.5%

Short share of volume

2026-11-02

500

Fails to deliver

settlement 2026-09-25

Thu 12 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 XBIO is 10,961 shares, down 11,504 shares over the last month. Over the last 48 readings it ranged from 529 shares (13 December 2024) to 93,447 shares (30 June 2025). At the reported average volume of 20K shares a day that is 1.0 days to cover.

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Settlement	Shares short	Change	Avg daily volume	Days to cover
2026-10-15	10,961	-14.8%	20,326	1.00
2026-09-30	12,868	-42.7%	277,145	1.00
2026-09-15	22,465	+10.6%	50,468	1.00
2026-08-31	20,320	-55.0%	31,148	1.00
2026-08-14	45,169	+299.3%	111,557	1.00
2026-07-31	11,313	-41.4%	16,846	1.00
2026-07-15	19,290	-18.2%	16,355	1.18
2026-06-30	23,589	+158.0%	19,757	1.19
2026-06-15	9,143	-44.2%	19,697	1.00
2026-05-29	16,388	+177.1%	8,366	1.96
2026-05-15	5,914	-18.6%	14,613	1.00
2026-04-30	7,266	-51.2%	16,053	1.00
2026-04-15	14,880	-27.8%	15,555	1.00
2026-03-31	20,598	-50.5%	25,310	1.00
2026-03-13	41,648	-17.1%	26,424	1.58
2026-02-27	50,255	-9.8%	16,143	3.11
2026-02-13	55,692	+245.0%	28,113	1.98
2026-01-30	16,141	+231.4%	34,180	1.00
2026-01-15	4,870	-23.8%	17,808	1.00
2025-12-31	6,390	-4.3%	34,425	1.00
2025-12-15	6,679	-66.1%	34,557	1.00
2025-11-28	19,690	+35.3%	62,016	1.00
2025-11-14	14,551	-35.5%	55,333	1.00
2025-10-31	22,549	-63.9%	105,157	1.00
2025-10-15	62,406	+269.1%	4,572,621	1.00
2025-09-30	16,909	-28.0%	9,829	1.72
2025-09-15	23,478	+6.7%	18,350	1.28
2025-08-29	21,995	+1.0%	11,703	1.88
2025-08-15	21,771	-50.0%	14,648	1.49
2025-07-31	43,583	+33.1%	68,260	1.00
2025-07-15	32,752	-65.0%	41,330	1.00
2025-06-30	93,447	+2578.3%	336,682	1.00
2025-06-13	3,489	-0.1%	6,905	1.00
2025-05-30	3,494	-10.6%	4,358	1.00
2025-05-15	3,906	-43.3%	11,944	1.00
2025-04-30	6,886	+74.4%	6,474	1.06
2025-04-15	3,948	+13.8%	9,559	1.00
2025-03-31	3,470	-23.5%	8,683	1.00
2025-03-14	4,534	-45.7%	4,904	1.00
2025-02-28	8,353	+28.3%	4,809	1.74
2025-02-14	6,512	-15.0%	4,873	1.34
2025-01-31	7,665	-21.8%	6,445	1.19
2025-01-15	9,801	-2.7%	8,152	1.20
2024-12-31	10,070	+1803.6%	12,968	1.00
2024-12-13	529	-93.5%	25,186	1.00
2024-11-29	8,100	-3.2%	30,269	1.00
2024-11-15	8,364	-43.6%	43,823	1.00
2024-10-31	14,832	-11.6%	11,484	1.29

Daily short volume

FINRA Reg SHO, the last 30 sessions. JSON

As of 2 November 2026, the short share of XBIO volume is 34.5%, down 43.6 points over the last five sessions. Over the last 30 readings it ranged from 2.5% (22 October 2026) to 80.3% (29 October 2026). The latest reading is 5.6 points below the 30-session average of 40.2%, on 17K shares reported.

Date	Short volume	Total volume	Short share	Exempt
2026-11-02	6K	17K	34.5%	0
2026-10-30	7K	18K	39.6%	0
2026-10-29	14K	17K	80.3%	0
2026-10-28	41K	77K	52.5%	0
2026-10-27	2K	5K	41.1%	0
2026-10-26	26K	33K	78.2%	5,691
2026-10-23	455	5K	9.6%	0
2026-10-22	368	15K	2.5%	0
2026-10-21	3K	5K	60.4%	0
2026-10-20	2K	7K	21.0%	0
2026-10-19	1K	7K	21.7%	0
2026-10-16	5K	9K	57.3%	561
2026-10-15	9K	23K	38.6%	100
2026-10-14	841	3K	32.4%	0
2026-10-13	7K	11K	66.6%	0
2026-10-12	3K	6K	47.3%	0
2026-10-09	2K	5K	40.8%	0
2026-10-08	2K	10K	17.9%	0
2026-10-07	2K	6K	37.0%	0
2026-10-06	6K	7K	79.5%	0
2026-10-05	2K	5K	38.8%	0
2026-10-02	5K	19K	28.6%	0
2026-10-01	3K	8K	34.7%	0
2026-09-30	7K	14K	54.3%	0
2026-09-29	4K	11K	38.9%	0
2026-09-28	4K	18K	20.2%	0
2026-09-25	9K	24K	37.9%	0
2026-09-24	9K	32K	29.4%	0
2026-09-23	9K	39K	22.3%	1,785
2026-09-22	28K	70K	40.7%	1,673

Fails to deliver

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

As of 25 September 2026, the fails-to-deliver balance in XBIO is 500 shares, up 499 shares over the last settlement date. Over the last 30 readings it ranged from 1 share (21 September 2026) to 8,735 shares (18 September 2026). The latest reading sits at the bottom of that range.

Settlement	Shares failed	Price	Value
2026-09-25	500	$2.47	$1K
2026-09-21	1	$2.77	$3
2026-09-18	8,735	$2.46	$21K
2026-09-17	2,974	$2.19	$7K
2026-09-02	852	$4.23	$4K
2026-08-06	73	$2.89	$211
2026-08-04	696	$2.66	$2K
2026-07-31	430	$2.48	$1K
2026-07-20	43	$2.93	$126
2026-07-17	31	$2.81	$87
2026-07-16	185	$2.90	$537
2026-07-15	344	$3.00	$1K
2026-07-07	97	$2.92	$283
2026-07-06	60	$2.83	$170
2026-06-30	130	$2.85	$371
2026-06-29	145	$2.95	$428
2026-06-11	22	$3.00	$66
2026-06-09	762	$3.15	$2K
2026-06-08	857	$3.05	$3K
2026-06-02	85	$3.31	$281
2026-05-29	3,852	$3.09	$12K
2026-05-27	7,482	$3.05	$23K
2026-05-26	7,773	$3.04	$24K
2026-05-19	143	$2.87	$410
2026-05-18	76	$2.98	$226
2026-04-16	190	$3.38	$642
2026-04-08	480	$3.20	$2K
2026-04-02	433	$2.82	$1K
2026-03-30	117	$2.72	$318
2026-03-23	1,441	$3.26	$5K

Insider trades

SEC Form 4, newest first. JSON

No open-market insider trades were reported for XBIO in the last 90 days. The most recent filings are listed below. Latest filing: PARSLOW JAMES F (Interim CEO and CFO) on 2026-04-21.

Date	Insider	Title	Type	Shares	Price	Value	Owned after
2026-04-21	PARSLOW JAMES F	Interim CEO and CFO	Grant	100K	$0.00	$0	100K

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 XBIO in their latest filing, all on Schedule 13G (passive). The largest reported stake is Renaissance Technologies LLC at 6.0% of the class (137,440 shares), filed 2026-05-14 for an event on 2026-03-31.

Filed	Form	Holder	Shares	Of class	Event
2026-09-18	13G	MJL Manager LLCinvestment adviser	0	0.0%	2026-09-16
2026-09-18	13G	Michael Liuindividual	0	0.0%	2026-09-16
2026-05-14	13G/Ano. 1	Renaissance Technologies LLCinvestment adviser	137K	6.0%	2026-03-31
2026-05-14	13G/Ano. 1	Renaissance Technologies Holdings Corporationparent holding company	137K	6.0%	2026-03-31

13F holders

Tracked managers holding XBIO at their latest 13F. JSON

1 of the 30 tracked managers held XBIO at their latest 13F, $342K in total at quarter-end prices. Renaissance Technologies is the largest at $342K (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	117K	$342K	0.00%	-20K

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

Xenetic Biosciences 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 Xenetic Biosciences (XBIO), SEC CIK 1534525, 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 2026-10-15.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 2026-09-25.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 2026-09-18.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 2026-08-07.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 2026-04-21.JSON and CSV
Company record: EDGAR filing index for CIK 1534525Ticker, 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 XBIO is sold short?

10,961 shares were held short at the 2026-10-15 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 XBIO's daily short volume?

On 2026-11-02, 5,867 of the 16,989 XBIO shares reported to FINRA were sold short, 34.5% of the day's reported volume. Short volume is a flow for one day, not a position.

Does XBIO have fails to deliver?

The SEC's latest file shows 500 XBIO shares failed to deliver at settlement 2026-09-25. Fails are reported per settlement date and published twice a month with a lag.

Are XBIO insiders buying or selling?

No open-market insider trades were reported for XBIO in the last 90 days. The most recent filings are listed below. Latest filing: PARSLOW JAMES F (Interim CEO and CFO) on 2026-04-21.

Who owns 5% or more of XBIO?

Which tracked 13F managers own XBIO?

1 of the 30 tracked 13F managers held XBIO shares at their latest filing, $342K in all. The largest: Renaissance Technologies (117K shares, $342K).

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

Xenetic Biosciences (XBIO)

Short interest

Daily short volume

Fails to deliver

Insider trades

Large holders (13D and 13G)

13F holders

Xenetic Biosciences in the regulatory record

Source and updates

How to read it

Other company pages

Datasets

Frequently Asked Questions