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 Mar 31, 2025
Ownership Breakdown
70
Institutional Holders
▲ 16 vs Q4
$29.58M
Total Inst. Value
▲ $19.19M vs Q4
25.91M
Shares Outstanding
freeFloat 93.28%
3.96M
13F Shares Held
▲ 1.77M vs Q4
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
Q1 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
VANGUARD GROUP INC services-management consulting services | 705.9K | 3.61% | 3.61% | $5.27B | May 9, 2025 | ▲ 103.4K |
SUSQUEHANNA INTERNATIONAL GROUP, LLP services-management consulting services | 671.3K | 3.43% | 3.43% | $5.01B | May 14, 2025 | ▲ 520.9K |
UBS GROUP AG services-management consulting services | 576.8K | 2.95% | 2.95% | $4.30B | May 13, 2025 | ▲ 492.3K |
SCULPTOR CAPITAL LP services-management consulting services | 373.0K | 1.91% | 1.91% | $2.78B | May 15, 2025 | ▲ 355.5K |
MORGAN STANLEY services-management consulting services | 288.1K | 1.47% | 1.47% | $2.15B | May 15, 2025 | ▲ 259.9K |
BLACKROCK, INC. services-management consulting services | 257.7K | 1.32% | 1.32% | $1.92B | May 2, 2025 | ▲ 191.2K |
GEODE CAPITAL MANAGEMENT, LLC services-management consulting services | 177.9K | 91.00% | 91.00% | $1.33B | May 13, 2025 | ▲ 6.1K |
JANE STREET GROUP, LLC services-management consulting services | 169.6K | 86.79% | 86.79% | $1.27B | May 19, 2025 | ▲ 134.5K |
SUSQUEHANNA INTERNATIONAL GROUP, LLP services-management consulting services | 169.6K | 86.76% | 86.76% | $1.27B | May 14, 2025 | ▲ 91.6K |
TORTOISE INVESTMENT MANAGEMENT, LLC services-management consulting services | 163.5K | 83.65% | 83.65% | $1.22B | Aug 7, 2025 | ▲ 93.2K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q1 2025 vs prior quarter
Q1 2025
28
Increased
+2.79M shares10
New Positions
first time holders9
Decreased
−346.6K shares0
Sold Out
fully exitedNet shares change (top 50)
+2.45M
+2.79M / −346.6K
Net new holders
+29
10 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 15.3% of total shares outstanding. Company insiders own approximately 6.72%, while retail and public investors account for the remaining 77.98%.
The largest institutional shareholder of Lightbridge Corporation is VANGUARD GROUP INC, holding approximately 705,851 shares — equal to 3.61% of outstanding shares — as of March 31, 2025.
A total of 70 institutional investors currently hold LTBR stock, with a combined institutional value of approximately $29,575,279 as of the most recent 13F filing period.
Frequently asked questions
LTBR ownershipLightbridge Corporation (LTBR) is primarily owned by institutional investors, who hold approximately 15.3% of shares. The largest shareholder is VANGUARD GROUP INC with a 3.61% stake. Company insiders hold 6.72%. Data sourced from SEC Form 13F as of March 31, 2025.