XOOMAR

Lightbridge (LTBR)

Lightbridge on one page: short interest, daily short volume, fails to deliver, planned sales, large holders, 13F holders, financials, earnings dates and insider trades. Listed on Nasdaq, classified by the SEC as industrial inorganic chemicals.

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4.1M

Short interest

settlement 2026-09-30

4.0

Days to cover

-4.3 days vs prior

64.8%

Short share of volume

2026-10-09

3,518

Fails to deliver

settlement 2026-09-14

Wed 4 Nov

Next earnings

estimated date

-$147K

Insider flow, 90 days

0 buys, 3 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 LTBR is 4,107,390 shares, down 369,965 shares over the last month. Over the last 48 readings it ranged from 112,736 shares (15 October 2024) to 4,895,179 shares (15 September 2026). At the reported average volume of 1.0M shares a day that is 4.0 days to cover.

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SettlementShares shortChangeAvg daily volumeDays to cover
2026-09-304,107,390-16.1%1,030,4753.99
2026-09-154,895,179+9.3%588,4098.32
2026-08-314,477,355-6.7%590,7827.58
2026-08-144,796,497+10.8%690,8836.94
2026-07-314,326,871+2.6%1,133,8923.82
2026-07-154,216,613+5.6%677,7546.22
2026-06-303,991,959-5.2%1,058,6473.77
2026-06-154,211,317+2.8%1,165,6513.61
2026-05-294,095,251+6.5%805,8685.08
2026-05-153,845,334-7.4%859,8694.47
2026-04-304,153,801+2.5%886,6964.68
2026-04-154,052,607+2.2%712,0285.69
2026-03-313,965,603-2.9%891,2754.45
2026-03-134,083,399+8.8%959,2124.26
2026-02-273,753,077+1.0%592,7396.33
2026-02-133,714,692-0.6%932,1083.99
2026-01-303,735,531-5.2%984,7883.79
2026-01-153,938,839-4.9%1,057,9773.72
2025-12-314,141,880+14.4%1,226,7943.38
2025-12-153,620,165+6.7%905,6494.00
2025-11-283,394,338-13.3%1,237,2972.74
2025-11-143,915,222+32.3%1,608,4292.43
2025-10-312,958,363+7.6%1,988,2231.49
2025-10-152,749,708-19.0%2,802,3191.00

Daily short volume

FINRA Reg SHO, the last 30 sessions. JSON

As of 9 October 2026, the short share of LTBR volume is 64.8%, up 9.0 points over the last five sessions. Over the last 30 readings it ranged from 34.8% (8 September 2026) to 74.3% (6 October 2026). The latest reading is 8.2 points above the 30-session average of 56.7%, on 190K shares reported.

DateShort volumeTotal volumeShort shareExempt
2026-10-09123K190K64.8%2,453
2026-10-08227K431K52.6%16,327
2026-10-07227K336K67.6%741
2026-10-06438K590K74.3%1,300
2026-10-05145K199K72.8%0
2026-10-0294K169K55.8%0
2026-10-0197K169K57.2%400
2026-09-30113K185K61.1%50
2026-09-29151K305K49.4%62
2026-09-2873K177K41.1%110
2026-09-25148K213K69.4%70
2026-09-2484K184K45.7%111
2026-09-2379K150K52.9%8
2026-09-22145K249K58.3%2
2026-09-21144K333K43.3%30
2026-09-18217K319K67.8%383
2026-09-17168K289K58.0%2,122
2026-09-16172K323K53.2%88
2026-09-15145K354K41.0%638
2026-09-14189K373K50.6%2,292
2026-09-11149K245K60.6%3,474
2026-09-10118K213K55.5%255
2026-09-09136K229K59.4%706
2026-09-08110K318K34.8%1,998
2026-09-0478K134K57.8%0
2026-09-0398K168K58.3%200
2026-09-02164K254K64.5%3
2026-09-01139K243K57.1%1,784
2026-08-31125K231K54.0%99
2026-08-28187K307K61.0%4,143

Fails to deliver

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

As of 14 September 2026, the fails-to-deliver balance in LTBR is 3,518 shares, up 985 shares over the last settlement date. Over the last 30 readings it ranged from 41 shares (9 September 2026) to 146,173 shares (3 August 2026). The latest reading sits at the bottom of that range.

SettlementShares failedPriceValue
2026-09-143,518$7.02$25K
2026-09-112,533$7.34$19K
2026-09-0941$7.89$323
2026-09-08404$7.58$3K
2026-09-03810$7.57$6K
2026-08-3114,557$7.55$110K
2026-08-2711,229$8.05$90K
2026-08-266,909$8.33$58K
2026-08-24909$8.22$7K
2026-08-2035,357$8.05$285K
2026-08-18507$8.15$4K
2026-08-171,367$8.45$12K
2026-08-141,511$8.72$13K
2026-08-124,260$9.06$39K
2026-08-073,084$9.15$28K
2026-08-052,088$8.93$19K
2026-08-03146,173$8.24$1.2M
2026-07-31275$8.44$2K
2026-07-291,650$7.90$13K
2026-07-2213,768$8.04$111K
2026-07-1352$8.42$438
2026-07-061,349$8.64$12K
2026-07-013,461$8.79$30K
2026-06-303,461$8.77$30K
2026-06-2959,912$8.66$519K
2026-06-262,875$8.91$26K
2026-06-242,784$9.31$26K
2026-06-16124,365$9.97$1.2M
2026-06-15179$9.40$2K
2026-06-12101,744$9.16$932K

Insider trades

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

Insiders at LTBR reported 3 open-market sells worth $147K in the last 90 days and no open-market buys. Latest filing: Goodman Sherri (Director) on 2026-10-01.

DateInsiderTitleTypeSharesPriceValueOwned after
2026-10-01Goodman SherriDirectorSell1K$6.29$7K69K
2026-09-01Chakraborty SwetaDirectorSell717$7.43$5K57K
2026-08-28MUSHAKOV ANDREYEVP & Chief Operating OfficerTax withholding7K$7.55$51K458K
2026-08-28Holcombe Scott RandallSVP & Chief Technology OfficerTax withholding103$7.55$7789K
2026-08-28Holcombe Scott RandallSVP & Chief Technology OfficerTax withholding4K$7.55$28K313K
2026-08-28GRAE SETHPresident and CEOTax withholding11K$7.55$83K872K
2026-08-28GOLDMAN LARRYCFOTax withholding7K$7.55$54K378K
2026-08-11Tobin Mark RobertDirectorSell15K$8.99$135K67K
2026-08-06MAGRAW DANIEL BDirectorGrant10K$0.00$055K
2026-08-06Tobin Mark RobertDirectorGrant10K$0.00$082K
2026-08-06MUSHAKOV ANDREYEVP & Chief Operating OfficerGrant84K$0.00$0464K
2026-08-06Holcombe Scott RandallSVP & Chief Technology OfficerGrant4K$0.00$09K
2026-08-06Holcombe Scott RandallSVP & Chief Technology OfficerGrant65K$0.00$0316K
2026-08-06Goodman SherriDirectorGrant10K$0.00$070K
2026-08-06GRAE SETHPresident and CEOGrant105K$0.00$0883K
2026-08-06GOLDMAN LARRYCFOGrant65K$0.00$0385K
2026-08-06Funches Jesse L.DirectorGrant10K$0.00$084K
2026-08-06Chakraborty SwetaDirectorGrant10K$0.00$058K
2026-07-01Goodman SherriDirectorSell1K$9.29$10K60K
2026-07-01Chakraborty SwetaDirectorSell1K$9.29$11K48K
2026-06-22Goodman SherriDirectorSell1K$9.58$11K61K
2026-04-03MUSHAKOV ANDREYEVP, Nuclear OperationsTax withholding9K$11.09$95K380K
2026-04-03GRAE SETHPresident and CEOTax withholding13K$11.09$147K778K
2026-04-03GOLDMAN LARRYCFOTax withholding9K$11.09$100K320K
2026-01-29MUSHAKOV ANDREYEVP, Nuclear OperationsSell3K$16.03$45K389K
2026-01-29MUSHAKOV ANDREYEVP, Nuclear OperationsSell25K$16.54$412K392K
2026-01-29MUSHAKOV ANDREYEVP, Nuclear OperationsSell3K$17.48$44K417K
2026-01-15GOLDMAN LARRYCFOSell6K$18.07$115K329K
2026-01-14GOLDMAN LARRYCFOSell3K$18.00$45K335K
2026-01-09Funches Jesse L.DirectorSell1K$16.96$25K74K
2026-01-06Chakraborty SwetaDirectorSell1K$15.68$20K49K
2026-01-02Tobin Mark RobertDirectorGrant11K$0.00$072K
2026-01-02MAGRAW DANIEL BDirectorGrant11K$0.00$045K
2026-01-02Goodman SherriDirectorGrant11K$0.00$062K
2026-01-02Funches Jesse L.DirectorGrant11K$0.00$075K
2026-01-02Chakraborty SwetaDirectorGrant11K$0.00$050K
2026-01-02Chakraborty SwetaDirectorSell2K$12.88$25K40K
2025-12-16GOLDMAN LARRYCFOSell5K$14.50$79K338K
2025-12-15MUSHAKOV ANDREYEVP, Nuclear OperationsTax withholding8K$14.49$117K419K
2025-12-15GRAE SETHPresident and CEOTax withholding13K$14.49$188K791K
2025-12-15GOLDMAN LARRYCFOTax withholding8K$14.49$123K343K
2025-12-05GOLDMAN LARRYCFOSell8K$17.50$141K352K
2025-12-04MUSHAKOV ANDREYEVP, Nuclear OperationsTax withholding12K$17.79$212K427K
2025-12-04GRAE SETHPresident and CEOTax withholding19K$17.79$340K804K
2025-12-04GOLDMAN LARRYCFOTax withholding13K$17.79$222K360K
2025-12-01MUSHAKOV ANDREYEVP, Nuclear OperationsGrant50K$0.00$0439K
2025-12-01GRAE SETHPresident and CEOGrant81K$0.00$0823K
2025-12-01GOLDMAN LARRYCFOGrant47K$0.00$0372K
2025-12-01Chakraborty SwetaDirectorSell2K$15.47$30K42K
2025-11-20MUSHAKOV ANDREYEVP, Nuclear OperationsTax withholding7K$14.53$98K389K

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.

Planned sales (Form 144)

Newest first. JSON

11 Form 144 notices on file for LTBR worth $3.5M at the prices reported; 1 in the last 90 days worth $135K. Latest: Tobin Mark Robert filed on 2026-08-11 to sell 15,000 shares ($135K) from 2026-08-11.

FiledSellerSharesMarket valueOf outstandingSale fromBroker
2026-08-11Tobin Mark RobertDirector15K$135K0.047%2026-08-11Jefferies LLC
2026-01-29MUSHAKOV ANDREYOfficer30K$502K0.094%2026-01-29Jefferies LLC
2026-01-14GOLDMAN LARRYOfficer3K$48K0.008%2026-01-14Stifel Nicolaus & Company Inc
2026-01-06Chakraborty SwetaDirector1K$20K0.004%2026-01-06Stifel Nicolaus & Company Inc
2025-12-16GOLDMAN LARRYOfficer8K$142K0.025%2025-12-16Stifel Nicolaus & Company Inc
2025-12-05GOLDMAN LARRYOfficer12K$210K0.037%2025-12-05Stifel Nicolaus & Company Inc
2025-12-01Chakraborty SwetaDirector4K$60K0.012%2025-12-01Stifel Nicolaus & Company Inc
2025-11-20GOLDMAN LARRYOfficer5K$69K0.014%2025-11-20Stifel Nicolaus & Company Inc
2025-10-10MUSHAKOV ANDREYOfficer25K$393K0.097%2025-10-10Stifel Nicolaus & Company Inc
2025-10-10GRAE SETHOfficer61K$1.6M0.234%2025-10-10Stifel Nicolaus & Company Inc
2025-09-22MUSHAKOV ANDREYOfficer18K$353K0.068%2025-09-22Stifel Nicolaus & Company Inc

Large holders (13D and 13G)

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

3 holders report 5% or more of LTBR in their latest filing, all on Schedule 13G (passive). The largest reported stake is STATE STREET CORPORATION at 8.1% of the class (2,829,502 shares), filed 2026-08-07 for an event on 2026-06-30.

FiledFormHolderSharesOf classEvent
2026-08-0713GSTATE STREET CORPORATIONparent holding company2.8M8.1%2026-06-30
2026-08-0713GSSGA FUNDS MANAGEMENT, INC.investment adviser2.2M6.4%2026-06-30
2026-07-2913G/Ano. 1BlackRock, Inc.parent holding company2.5M7.2%2026-06-30
2026-03-2713G/Ano. 1The Vanguard Groupinvestment adviser00.0%2026-03-13
2025-11-1413G/Ano. 2AK Jensen Investment Management Ltdnon-US institution, other entity1.2M3.9%2025-09-30

13F holders

Tracked managers holding LTBR at their latest 13F. JSON

6 of the 30 tracked managers held LTBR at their latest 13F, $11.5M in total at quarter-end prices. Millennium Management is the largest at $6.1M (0.0% of its portfolio) as of 2026-06-30. Over the prior quarter 3 added shares and 3 cut.

FundQuarterSharesValueOf portfolioChange in shares
Millennium Management2026-06-30699K$6.1M0.00%+464K
Renaissance Technologies2026-06-30338K$3.0M0.00%-316K
D. E. Shaw & Co.2026-06-30167K$1.5M0.00%+111K
AQR Capital Management2026-06-3057K$501K0.00%+40K
Two Sigma Investments2026-06-3026K$233K0.00%-116K
Citadel Advisors2026-06-3025K$221K0.00%-58K

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.

Financials

SEC XBRL, as filed. JSON

In Q2 FY 2026 (quarter ended 2026-06-30) Lightbridge reported revenue of $0, and net loss of $5.8M (-0.18 diluted EPS). In FY 2025 it generated -$14.3M of operating cash flow.

Cash
$192.1M
Equity
$238.6M
Total assets
$240.6M
Shares outstanding
37,458,091

Quarterly, last 8 quarters

QuarterPeriod endRevenueNet incomeMarginDiluted EPS
Q2 FY 20262026-06-30$0-$5.8Mn/a-0.18
Q1 FY 20262026-03-31$0-$6.3Mn/a-0.20
Q4 FY 2025derived2025-12-31n/a-$7.2Mn/an/a
Q3 FY 20252025-09-30n/a-$4.1Mn/a-0.16
Q2 FY 20252025-06-30$0-$3.5Mn/a-0.16
Q1 FY 20252025-03-31$0-$4.8Mn/a-0.24
Q4 FY 2024derived2024-12-31$0-$3.9Mn/an/a
Q3 FY 20242024-09-30$0-$2.7Mn/a-0.19

Fiscal years, with buybacks and dividends

Fiscal yearEndsRevenueNet incomeOperating cash flowCapexBuybacksDividends
FY 20252025-12-31$0-$19.6M-$14.3Mn/an/an/a
FY 20242024-12-31$0-$11.8M-$9.5Mn/an/an/a
FY 20232023-12-31$0-$7.9M-$6.5Mn/an/an/a
FY 20222022-12-31$0-$7.5M-$6.8Mn/an/an/a
FY 20212021-12-31$0-$7.8M-$11.0Mn/an/an/a

Quarters are the three-month figures the company reports; a fourth quarter marked derived is the fiscal year less the three reported quarters, since companies report it only inside the 10-K. Fiscal years are the annual figures. Buybacks are the cash the company paid to repurchase its common stock in the year, not the amount authorized. Balance sheet lines are as of 2026-06-30; shares outstanding as of 2026-07-28 from the cover page.

What this page is

Lightbridge 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 Lightbridge (LTBR), SEC CIK 1084554, listed on Nasdaq, classified by the SEC as industrial inorganic chemicals. 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
Planned sales
SEC EDGAR Form 144Source: SEC.New notices appear shortly after the SEC posts them; a notice is filed on or before the sale. Latest 2026-08-11.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 2026-08-07.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
Financials
SEC EDGAR 10-K and 10-Q filingsSource: SEC.Weekly; values are as filed in the 10-Q and 10-K. 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 2026-08-05.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 1084554Ticker, 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 LTBR is sold short?
4,107,390 shares were held short at the 2026-09-30 settlement, 4.0 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 LTBR's daily short volume?
On 2026-10-09, 123,312 of the 190,202 LTBR shares reported to FINRA were sold short, 64.8% of the day's reported volume. Short volume is a flow for one day, not a position.
Does LTBR have fails to deliver?
The SEC's latest file shows 3,518 LTBR shares failed to deliver at settlement 2026-09-14. Fails are reported per settlement date and published twice a month with a lag.
Are LTBR insiders buying or selling?
Insiders at LTBR reported 3 open-market sells worth $147K in the last 90 days and no open-market buys. Latest filing: Goodman Sherri (Director) on 2026-10-01.
Have LTBR insiders filed to sell?
11 Form 144 notices on file for LTBR worth $3.5M at the prices reported; 1 in the last 90 days worth $135K. Latest: Tobin Mark Robert filed on 2026-08-11 to sell 15,000 shares ($135K) from 2026-08-11.
Who owns 5% or more of LTBR?
3 holders report 5% or more of LTBR in their latest filing, all on Schedule 13G (passive). The largest reported stake is STATE STREET CORPORATION at 8.1% of the class (2,829,502 shares), filed 2026-08-07 for an event on 2026-06-30.
What did LTBR report last quarter?
In Q2 FY 2026 (quarter ended 2026-06-30) Lightbridge reported revenue of $0, and net loss of $5.8M (-0.18 diluted EPS). In FY 2025 it generated -$14.3M of operating cash flow.
Which tracked 13F managers own LTBR?
6 of the 30 tracked 13F managers held LTBR shares at their latest filing, $11.5M in all. The largest: Izzy Englander's Millennium Management (699K shares, $6.1M), Renaissance Technologies (338K shares, $3.0M), D. E. Shaw & Co. (167K shares, $1.5M), Cliff Asness's AQR Capital Management (57K shares, $501K), Two Sigma Investments (26K shares, $233K), Ken Griffin's Citadel Advisors (25K shares, $221K).

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