Opthea Limited
Opthea Limited (OPT) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · OPT · as of Mar 31, 2025
Ownership Breakdown
6
Institutional Holders
▼ 5 vs Q4
$613,425
Total Inst. Value
▼ $20.58M vs Q4
155.27M
Shares Outstanding
freeFloat 63.12%
205,962
13F Shares Held
▼ 5.19M 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
OPT largest shareholders · institutional ownership
Q1 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
HSBC HOLDINGS PLC biological products, (no diagnostic substances) | 105.9K | 0.87% | 0.87% | $355.95M | May 14, 2025 | ▼ 36.6K |
MILLENNIUM MANAGEMENT LLC biological products, (no diagnostic substances) | 48.3K | 0.40% | 0.40% | $81.19M | May 15, 2025 | ▼ 12.8K |
TWIN LAKES CAPITAL MANAGEMENT, LLC biological products, (no diagnostic substances) | 33.2K | 0.27% | 0.27% | $113.06M | May 23, 2025 | ▲ 13.3K |
EP WEALTH ADVISORS, LLC biological products, (no diagnostic substances) | 10.0K | 0.08% | 0.08% | $34.10M | May 15, 2025 | NEW |
UBS GROUP AG biological products, (no diagnostic substances) | 7.8K | 0.06% | 0.06% | $26.51M | May 13, 2025 | ▼ 29.0K |
MORGAN STANLEY biological products, (no diagnostic substances) | 765 | 0.01% | 0.01% | $2.61M | May 15, 2025 | ▼ 2.6K |
ABC ARBITRAGE SA biological products, (no diagnostic substances) | 0 | 0.00% | 0.00% | $0 | May 9, 2025 | EXIT |
BAKER BROS. ADVISORS LP biological products, (no diagnostic substances) | 0 | 0.00% | 0.00% | $0 | May 15, 2025 | EXIT |
CITADEL ADVISORS LLC biological products, (no diagnostic substances) | 0 | 0.00% | 0.00% | $0 | May 15, 2025 | EXIT |
SUSQUEHANNA INTERNATIONAL GROUP, LLP biological products, (no diagnostic substances) | 0 | 0.00% | 0.00% | $0 | May 14, 2025 | EXIT |
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
1
Increased
+13.3K shares1
New Positions
first time holders4
Decreased
−80.9K shares6
Sold Out
fully exitedNet shares change (top 50)
67.6K
+13.3K / −80.9K
Net new holders
-8
1 new / 6 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
OPT insider trading · insider activity
Source: SEC Form 4
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
HARROLD JASON M President, Managed Vision Div. | Mar 6, 2006 | D-Return | 784 | $19.12 | $15.0K | 0 | Form 4 ↗ |
HARROLD JASON M President, Managed Vision Div. | Mar 6, 2006 | D-Return | 785 | $12.75 | $10.0K | 0 | Form 4 ↗ |
HARROLD JASON M President, Managed Vision Div. | Mar 6, 2006 | D-Return | 15,000 | $8.05 | $120.8K | 0 | Form 4 ↗ |
HARROLD JASON M President, Managed Vision Div. | Mar 6, 2006 | D-Return | 785 | $6.37 | $5.0K | 0 | Form 4 ↗ |
HARROLD JASON M President, Managed Vision Div. | Mar 6, 2006 | D-Return | 7,000 | $0.68 | $4.8K | 0 | Form 4 ↗ |
HARROLD JASON M President, Managed Vision Div. | Mar 6, 2006 | D-Return | 11,250 | $5.85 | $65.8K | 0 | Form 4 ↗ |
HARROLD JASON M President, Managed Vision Div. | Mar 6, 2006 | D-Return | 22,500 | $0.65 | $14.6K | 0 | Form 4 ↗ |
HARROLD JASON M President, Managed Vision Div. | Mar 6, 2006 | D-Return | 125,000 | $0.15 | $18.8K | 0 | Form 4 ↗ |
HARROLD JASON M President, Managed Vision Div. | Mar 6, 2006 | D-Return | 25,000 | $0.20 | $5.0K | 0 | Form 4 ↗ |
HARROLD JASON M President, Managed Vision Div. | Mar 6, 2006 | D-Return | 45,000 | $1.78 | $80.1K | 0 | 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
Opthea Limited (OPT) is primarily owned by institutional investors, who hold approximately 0.1% of total shares outstanding. Company insiders own approximately 36.88%, while retail and public investors account for the remaining 62.99%.
The largest institutional shareholder of Opthea Limited is HSBC HOLDINGS PLC, holding approximately 105,939 shares — equal to 0.87% of outstanding shares — as of March 31, 2025.
A total of 6 institutional investors currently hold OPT stock, with a combined institutional value of approximately $613,425 as of the most recent 13F filing period.
Frequently asked questions
OPT ownershipOpthea Limited (OPT) is primarily owned by institutional investors, who hold approximately 0.1% of shares. The largest shareholder is HSBC HOLDINGS PLC with a 0.87% stake. Company insiders hold 36.88%. Data sourced from SEC Form 13F as of March 31, 2025.