Lightbridge Corporation
Lightbridge Corporation (LTBR) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · LTBR · as of Sep 30, 2025
Ownership Breakdown
119
Institutional Holders
▲ 21 vs Q2
$252.13M
Total Inst. Value
▲ $136.57M vs Q2
25.91M
Shares Outstanding
freeFloat 93.28%
11.89M
13F Shares Held
▲ 3.25M vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
LTBR largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
BLACKROCK, INC. services-management consulting services | 1.49M | 6.70% | 6.70% | $31.62B | Nov 12, 2025 | ▲ 346.0K |
VANGUARD GROUP INC services-management consulting services | 1.49M | 6.68% | 6.68% | $31.55B | Nov 7, 2025 | ▲ 237.4K |
EXCHANGE TRADED CONCEPTS, LLC services-management consulting services | 713.7K | 3.21% | 3.21% | $15.14B | Oct 14, 2025 | ▲ 126.1K |
SUSQUEHANNA INTERNATIONAL GROUP, LLP services-management consulting services | 601.3K | 2.70% | 2.70% | $12.75B | Nov 14, 2025 | ▲ 578.5K |
TWO SIGMA INVESTMENTS, LP services-management consulting services | 592.0K | 2.66% | 2.66% | $12.56B | Nov 14, 2025 | ▲ 285.5K |
UBS GROUP AG services-management consulting services | 579.0K | 2.60% | 2.60% | $12.28B | Nov 13, 2025 | ▲ 222.4K |
AMERIPRISE FINANCIAL INC services-management consulting services | 563.5K | 2.53% | 2.53% | $11.95B | Nov 14, 2025 | NEW |
GEODE CAPITAL MANAGEMENT, LLC services-management consulting services | 526.6K | 2.37% | 2.37% | $11.17B | Nov 12, 2025 | ▲ 52.8K |
PEAK6 LLC services-management consulting services | 498.8K | 2.24% | 2.24% | $10.58B | Mar 31, 2026 | ▲ 292.7K |
BNP PARIBAS ARBITRAGE, SNC services-management consulting services | 498.4K | 2.24% | 2.24% | $10.57B | Nov 13, 2025 | ▲ 312.6K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
34
Increased
+4.31M shares6
New Positions
first time holders6
Decreased
−508.0K shares0
Sold Out
fully exitedNet shares change (top 50)
+3.80M
+4.31M / −508.0K
Net new holders
+34
6 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
LTBR insider trading · insider activity
Source: SEC Form 4
Insiders have been primarily selling shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
5
Buy transactions
8
Sell transactions
0.63
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
GOLDMAN LARRY CFO | Apr 3, 2026 | Tax Withhold | 9,013 | $11.09 | $100.0K | 319.8K | Form 4 ↗ |
MUSHAKOV ANDREY EVP, Nuclear Operations | Apr 3, 2026 | Tax Withhold | 8,597 | $11.09 | $95.3K | 380.5K | Form 4 ↗ |
GRAE SETH President and CEO | Apr 3, 2026 | Tax Withhold | 13,256 | $11.09 | $147.0K | 778.0K | Form 4 ↗ |
MUSHAKOV ANDREY EVP, Nuclear Operations | Jan 29, 2026 | Sale | 2,533 | $17.48 | $44.3K | 416.8K | Form 4 ↗ |
MUSHAKOV ANDREY EVP, Nuclear Operations | Jan 29, 2026 | Sale | 24,929 | $16.54 | $412.4K | 391.9K | Form 4 ↗ |
MUSHAKOV ANDREY EVP, Nuclear Operations | Jan 29, 2026 | Sale | 2,827 | $16.03 | $45.3K | 389.1K | Form 4 ↗ |
GOLDMAN LARRY CFO | Jan 14, 2026 | Sale | 2,519 | $18.00 | $45.3K | 335.2K | Form 4 ↗ |
GOLDMAN LARRY CFO | Jan 15, 2026 | Sale | 6,350 | $18.07 | $114.7K | 328.8K | Form 4 ↗ |
Funches Jesse L. director | Jan 9, 2026 | Sale | 1,449 | $16.96 | $24.6K | 74.0K | Form 4 ↗ |
Chakraborty Sweta director | Jan 6, 2026 | Sale | 1,245 | $15.68 | $19.5K | 49.0K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Lightbridge Corporation (LTBR) is primarily owned by institutional investors, who hold approximately 45.9% of total shares outstanding. Company insiders own approximately 6.72%, while retail and public investors account for the remaining 47.41%.
The largest institutional shareholder of Lightbridge Corporation is BLACKROCK, INC., holding approximately 1.49 million shares — equal to 6.70% of outstanding shares — as of September 30, 2025.
A total of 119 institutional investors currently hold LTBR stock, with a combined institutional value of approximately $252,130,795 as of the most recent 13F filing period.
Frequently asked questions
LTBR ownershipLightbridge Corporation (LTBR) is primarily owned by institutional investors, who hold approximately 45.9% of shares. The largest shareholder is BLACKROCK, INC. with a 6.70% stake. Company insiders hold 6.72%. Data sourced from SEC Form 13F as of September 30, 2025.