LIGHTBRIDGE CORP LTBR
COM · Common Stock · CUSIP 53224K302 · ISIN US53224K3023
- SectorMaterials
- IndustryIndustrial Inorganic Chemicals
- HeadquartersReston, VA
- FilingsSEC EDGAR
* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once ($7.6k this quarter). Holder counts are more reliable. Implied quarter-end price ≈ $8.79. Options: 6 managers hold calls ($3.2m notional), 7 hold puts ($3.2m).
Trends to Q2 2026
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q3 2022 | 30 |
| Q4 2022 | 25 |
| Q1 2023 | 26 |
| Q2 2023 | 27 |
| Q3 2023 | 30 |
| Q4 2023 | 27 |
| Q1 2024 | 28 |
| Q2 2024 | 25 |
| Q3 2024 | 34 |
| Q4 2024 | 47 |
| Q1 2025 | 61 |
| Q2 2025 | 91 |
| Q3 2025 | 110 |
| Q4 2025 | 119 |
| Q1 2026 | 135 |
| Q2 2026 | 130 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q3 2024 | 17 | 8 |
| Q4 2024 | 32 | 13 |
| Q1 2025 | 43 | 18 |
| Q2 2025 | 64 | 22 |
| Q3 2025 | 72 | 27 |
| Q4 2025 | 70 | 42 |
| Q1 2026 | 67 | 48 |
| Q2 2026 | 65 | 59 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q3 2025 | $47.0m | $15.1m | 0.32 |
| Q4 2025 | $8.9m | $6.7m | 0.75 |
| Q1 2026 | $5.0m | $4.7m | 0.94 |
| Q2 2026 | $3.2m | $3.2m | 1.02 |
Biggest buyers
| BlackRock, Inc. | Added | +480.2k |
| MILLENNIUM MANAGEMENT LLC | Added | +463.8k |
| STATE STREET CORP | Added | +448.1k |
| GEODE CAPITAL MANAGEMENT, LLC | Added | +153.0k |
| VANGUARD CAPITAL MANAGEMENT LLC | Added | +121.4k |
| D. E. Shaw & Co., Inc. | Added | +111.0k |
| Trexquant Investment LP | New | +109.0k |
| Pacer Advisors, Inc. | Added | +67.0k |
| Atom Investors LP | New | +49.0k |
| NORTHERN TRUST CORP | Added | +40.7k |
Biggest sellers
| BNP PARIBAS FINANCIAL MARKETS | Reduced | -942.1k |
| RENAISSANCE TECHNOLOGIES LLC | Reduced | -315.5k |
| Nuveen, LLC | Reduced | -196.4k |
| TWO SIGMA INVESTMENTS, LP | Reduced | -116.2k |
| MORGAN STANLEY | Reduced | -100.0k |
| UBS Group AG | Reduced | -94.9k |
| Balyasny Asset Management L.P. | Reduced | -83.4k |
| CITADEL ADVISORS LLC | Reduced | -58.1k |
| LOS ANGELES CAPITAL MANAGEMENT LLC | Reduced | -34.7k |
| ROYAL BANK OF CANADA | Reduced | -31.7k |
Biggest calls
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | $1.3m153.0k shares |
| IMC-Chicago, LLC | Reduced | $676.8k77.0k shares |
| CITADEL ADVISORS LLC | Added | $618.8k70.4k shares |
| JANE STREET GROUP, LLC | Added | $403.5k45.9k shares |
| SIMPLEX TRADING, LLC | Added | $85.3k9.7k shares |
| GROUP ONE TRADING LLC | Reduced | $37.8k4.3k shares |
Biggest puts
| CITADEL ADVISORS LLC | Added | $995.9k113.3k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | $830.7k94.5k shares |
| IMC-Chicago, LLC | Reduced | $510.7k58.1k shares |
| JANE STREET GROUP, LLC | New | $318.2k36.2k shares |
| Tidal Investments LLC | Added | $259.3k29.5k shares |
| GROUP ONE TRADING LLC | Reduced | $207.4k23.6k shares |
| SIMPLEX TRADING, LLC | Reduced | $105.5k12.0k shares |
Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.
Major shareholders (over 5%)
Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.
| Holder | Stake |
|---|---|
| STATE STREET CORP 13G · institution +1.2 pts · filed 2026-08-07 | 8.1% |
| BlackRock, Inc. 13G · institution +1.0 pts · filed 2026-07-29 | 7.2% |
Fell to 5% or below in the last year: VANGUARD GROUP INC (0.0%, 2026-03-27), AK Jensen Investment Management Ltd (3.9%, 2025-11-14)
Insider purchases and sales since 1 Apr 2026
Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.
Officers and directors buying vs selling
Number of people, by quarter (10% owners not included)
Numbers
| Quarter | Buying | Bought | Selling | Sold | Sold under a plan |
|---|---|---|---|---|---|
| Q4 2024 | 0 | — | 1 | $25.9k | — |
| Q1 2025 | 0 | — | 3 | $1.4m | $1.0m |
| Q2 2025 | 0 | — | 6 | $1.6m | $1.1m |
| Q3 2025 | 0 | — | 4 | $1.2m | $887.9k |
| Q4 2025 | 0 | — | 5 | $2.7m | $2.7m |
| Q1 2026 | 0 | — | 4 | $731.2k | $731.2k |
| Q2 2026 | 0 | — | 1 | $10.7k | $10.7k |
| Q3 2026 | 0 | — | 3 | $161.2k | $26.3k |
| Date | Insider | Trade | Value |
|---|---|---|---|
| 2026-09-01 | Chakraborty Sweta Director | Sold plan | $5.3k717 shares |
| 2026-08-11 | Tobin Mark Robert Director | Sold | $134.8k15.0k shares |
| 2026-07-01 | Chakraborty Sweta Director | Sold plan | $10.6k1.1k shares |
| 2026-07-01 | Goodman Sherri Director | Sold plan | $10.4k1.1k shares |
| 2026-06-22 | Goodman Sherri Director | Sold plan | $10.7k1.1k shares |
Their holding: how much the trade added to or took from the insider's holding (direct, or the trust or fund named). The same trade is sometimes reported by more than one insider, such as a fund and the director who represents it; totals count it once. A value is left blank where the reported price is far from the market price (usually a typo).
Holders, Q2 2026
| Manager | Shares | Change |
|---|---|---|
| STATE STREET CORP 0.00% of their portfolio | 2.8m $24.9m | Added +448.1k |
| BlackRock, Inc. 0.00% of their portfolio | 2.6m $22.6m | Added +480.2k |
| VANGUARD CAPITAL MANAGEMENT LLC 0.00% of their portfolio | 1.5m $13.1m | Added +121.4k |
| EXCHANGE TRADED CONCEPTS, LLC 0.05% of their portfolio | 1.1m $9.8m | Added +35.6k |
| GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 876.8k $7.7m | Added +153.0k |
| MILLENNIUM MANAGEMENT LLC 0.00% of their portfolio | 698.9k $6.1m | Added +463.8k |
| UBS Group AG 0.00% of their portfolio | 542.5k $4.8m | Reduced -94.9k |
| BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio | 471.9k $4.1m | Reduced -942.1k |
| RENAISSANCE TECHNOLOGIES LLC 0.00% of their portfolio | 338.4k $3.0m | Reduced -315.5k |
| NORTHERN TRUST CORP 0.00% of their portfolio | 293.4k $2.6m | Added +40.7k |
| Pacer Advisors, Inc. 0.01% of their portfolio | 231.4k $2.0m | Added +67.0k |
| VANGUARD PORTFOLIO MANAGEMENT LLC 0.00% of their portfolio | 230.5k $2.0m | Added +15.5k |
| VANGUARD FIDUCIARY TRUST CO 0.00% of their portfolio | 221.6k $1.9m | Reduced -5.7k |
| Tortoise Investment Management, LLC 0.14% of their portfolio | 215.9k $1.9m | Unchanged |
| D. E. Shaw & Co., Inc. 0.00% of their portfolio | 166.5k $1.5m | Added +111.0k |
| Trexquant Investment LP 0.01% of their portfolio | 109.0k $957.8k | New |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio | 105.0k $923.1k | Added +19.2k |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.00% of their portfolio | 95.7k $840.8k | Added +7.6k |
| MORGAN STANLEY 0.00% of their portfolio | 89.9k $789.9k | Reduced -100.0k |
| Bank of New York Mellon Corp 0.00% of their portfolio | 85.5k $751.6k | Added +21.7k |
| Themes Management Co LLC 0.49% of their portfolio | 84.8k $745.3k | Added +19.1k |
| Nuveen, LLC 0.00% of their portfolio | 82.5k $725.0k | Reduced -196.4k |
| MARSHALL WACE, LLP 0.00% of their portfolio | 81.9k $719.7k | Reduced -23.5k |
| Inspire Investing, LLC 0.03% of their portfolio | 77.4k $680.8k | Added +28.1k |
| Geneos Wealth Management Inc. 0.01% of their portfolio | 72.7k $638.9k | Added +450 |
| Foundations Investment Advisors, LLC 0.01% of their portfolio | 70.4k $618.7k | Unchanged |
| BOOTHBAY FUND MANAGEMENT, LLC 0.01% of their portfolio | 64.8k $569.9k | Reduced -27.0k |
| Tempo Wealth, LLC 0.08% of their portfolio | 63.8k $560.4k | Reduced -4.6k |
| AQR CAPITAL MANAGEMENT LLC 0.00% of their portfolio | 57.0k $501.4k | Added +40.2k |
| JONES FINANCIAL COMPANIES LLLP 0.00% of their portfolio | 51.0k $441.7k | Added +16.7k |
| Atom Investors LP 0.04% of their portfolio | 49.0k $430.5k | New |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 43.5k $382.4k | Added +13.4k |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 43.0k $378.3k | Added +7.0k |
| RHUMBLINE ADVISERS 0.00% of their portfolio | 42.0k $369.4k | Added +9.8k |
| Balyasny Asset Management L.P. 0.00% of their portfolio | 41.6k $365.5k | Reduced -83.4k |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.00% of their portfolio | 40.0k $352.0k | Added +15.7k |
| GOLDMAN SACHS GROUP INC 0.00% of their portfolio | 39.7k $349.2k | Reduced -22.3k |
| ExodusPoint Capital Management, LP 0.00% of their portfolio | 35.9k $315.1k | New |
| DEUTSCHE BANK AG\ 0.00% of their portfolio | 33.6k $294.9k | Added +12.0k |
| BENJAMIN EDWARDS INC 0.00% of their portfolio | 33.3k $292.3k | New |
| Pilgrim Partners Asia Pte Ltd 0.13% of their portfolio | 33.0k $290.1k | Reduced -22.0k |
| Universal- Beteiligungs- und Servicegesellschaft mbH 0.00% of their portfolio | 32.0k $281.3k | Unchanged |
| Rockefeller Capital Management L.P. 0.00% of their portfolio | 31.7k $278.3k | Added +10.0k |
| Tidal Investments LLC 0.00% of their portfolio | 30.9k $272.0k | Added +18.0k |
| IMC-Chicago, LLC 0.00% of their portfolio | 30.0k $263.8k | Reduced -5.9k |
| DUDLEY CAPITAL MANAGEMENT, LLC 0.11% of their portfolio | 30.0k $263.7k | Unchanged |
| Rathbones Group PLC 0.00% of their portfolio | 28.9k $253.6k | Reduced -28.9k |
| Mariner, LLC 0.00% of their portfolio | 28.7k $251.9k | Added +3.7k |
| MILESTONE ASSET MANAGEMENT, LLC 0.04% of their portfolio | 27.5k $241.7k | New |
| TWO SIGMA INVESTMENTS, LP 0.00% of their portfolio | 26.5k $232.5k | Reduced -116.2k |
| LPL Financial LLC 0.00% of their portfolio | 25.9k $227.7k | Reduced -31.1k |
| Cetera Investment Advisers 0.00% of their portfolio | 25.6k $224.9k | Reduced -422 |
| CITADEL ADVISORS LLC 0.00% of their portfolio | 25.2k $221.1k | Reduced -58.1k |
| LeConte Wealth Management, LLC 0.12% of their portfolio | 24.6k $216.1k | Reduced -2.4k |
| MetLife Investment Management, LLC 0.00% of their portfolio | 24.4k $214.3k | Added +8.9k |
| ROYAL BANK OF CANADA 0.00% of their portfolio | 23.2k $203.0k | Reduced -31.7k |
| ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio | 21.8k $232.4k | New |
| AMERICAN CENTURY COMPANIES INC 0.00% of their portfolio | 21.2k $186.3k | New |
| Virtu Financial LLC 0.01% of their portfolio | 19.6k $173.0k | Reduced -16.7k |
| Creative Planning 0.00% of their portfolio | 18.3k $160.6k | New |
| Squarepoint Ops LLC 0.00% of their portfolio | 17.8k $156.1k | New |
| Invesco Ltd. 0.00% of their portfolio | 17.7k $155.9k | Added +4.4k |
| CITIGROUP INC 0.00% of their portfolio | 15.9k $139.5k | Added +14.3k |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. 0.00% of their portfolio | 15.8k $138.7k | Added +2.0k |
| WELLINGTON MANAGEMENT GROUP LLP 0.00% of their portfolio | 15.5k $135.9k | Added +1.8k |
| EntryPoint Capital, LLC 0.03% of their portfolio | 15.3k $134.2k | New |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 15.1k $132.5k | Added +2.3k |
| EAGLE GLOBAL ADVISORS LLC 0.00% of their portfolio | 14.0k $123.1k | Unchanged |
| RAYMOND JAMES FINANCIAL INC 0.00% of their portfolio | 13.1k $115.6k | Added +830 |
| Vanguard Global Advisers, LLC 0.00% of their portfolio | 13.0k $114.0k | Unchanged |
| GROUP ONE TRADING LLC 0.00% of their portfolio | 12.6k $110.8k | Reduced -8.6k |
| Graham Capital Management, L.P. 0.00% of their portfolio | 12.2k $107.2k | Reduced -18.2k |
| Powell Investment Advisors, LLC 0.03% of their portfolio | 11.7k $102.4k | Unchanged |
| INTECH INVESTMENT MANAGEMENT LLC 0.00% of their portfolio | 10.4k $91.1k | Reduced -1.2k |
| Kestra Advisory Services, LLC 0.00% of their portfolio | 10.2k $89.7k | Reduced -198 |
| Russell Investments Group, Ltd. 0.00% of their portfolio | 9.0k $79.3k | Added +7.1k |
| BARCLAYS PLC 0.00% of their portfolio | 8.3k $73.3k | Added +2.5k |
| Police & Firemen's Retirement System of New Jersey 0.00% of their portfolio | 8.0k $70.7k | Unchanged |
| NewEdge Advisors, LLC 0.00% of their portfolio | 8.0k $70.3k | Unchanged |
| NEW YORK STATE COMMON RETIREMENT FUND 0.00% of their portfolio | 6.7k $59.0k | Unchanged |
| Zurcher Kantonalbank (Zurich Cantonalbank) 0.00% of their portfolio | 5.5k $48.7k | Added +387 |
| Stone House Investment Management, LLC 0.01% of their portfolio | 4.9k $42.8k | Unchanged |
| TrinityBridge Ltd 0.00% of their portfolio | 4.2k $37.0k | Unchanged |
| LOS ANGELES CAPITAL MANAGEMENT LLC 0.00% of their portfolio | 4.0k $35.3k | Reduced -34.7k |
| Arax Advisory Partners 0.00% of their portfolio | 3.7k $32.8k | New |
| Integrated Wealth Concepts LLC 0.00% of their portfolio | 3.5k $30.6k | New |
| Legal & General Group Plc 0.00% of their portfolio | 3.3k $29.2k | Added +927 |
| Ameritas Investment Partners, Inc. 0.00% of their portfolio | 3.1k $27.3k | Added +1.2k |
| OSAIC HOLDINGS, INC. 0.00% of their portfolio | 3.0k $26.6k | Reduced -1.4k |
| WOLFF WIESE MAGANA LLC 0.01% of their portfolio | 3.0k $26.4k | Unchanged |
| SBI Securities Co., Ltd. 0.00% of their portfolio | 3.0k $26.1k | Added +552 |
| Quantbot Technologies LP 0.00% of their portfolio | 2.7k $23.6k | Added +1.9k |
| Tower Research Capital LLC (TRC) 0.00% of their portfolio | 2.5k $21.7k | Reduced -3.0k |
| SIMPLEX TRADING, LLC 0.00% of their portfolio | 2.0k $17.6k | Reduced -4.3k |
| PNC Financial Services Group, Inc. 0.00% of their portfolio | 1.2k $10.7k | Added +718 |
| HUNTINGTON NATIONAL BANK 0.00% of their portfolio | 1.0k $9.1k | Unchanged |
| Ancora Advisors LLC 0.00% of their portfolio | 1.0k $8.8k | Unchanged |
| SHP Wealth Management 0.00% of their portfolio | 763 $6.7k | Unchanged |
| NATIONAL BANK OF CANADA /FI/ 0.00% of their portfolio | 750 $6.6k | Reduced -1.0k |
| Essential Partners LLC 0.00% of their portfolio | 684 $6.0k | Reduced -83 |