Clearside Biomedical, Inc.
Clearside Biomedical, Inc. (CLSD) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · CLSD · as of Sep 30, 2025
Ownership Breakdown
26
Institutional Holders
▼ 18 vs Q2
$2.14M
Total Inst. Value
▼ $5.37M vs Q2
5.23M
Shares Outstanding
freeFloat 86.76%
540,692
13F Shares Held
▼ 8.85M 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
CLSD largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
VANGUARD GROUP INC pharmaceutical preparations | 222.0K | 4.24% | 4.24% | $881.21M | Nov 7, 2025 | NEW |
CARMIGNAC GESTION pharmaceutical preparations | 100.6K | 1.92% | 1.92% | $399.21M | Nov 13, 2025 | ▼ 1.41M |
GEODE CAPITAL MANAGEMENT, LLC pharmaceutical preparations | 52.7K | 1.01% | 1.01% | $209.42M | Nov 12, 2025 | NEW |
BLACKROCK, INC. pharmaceutical preparations | 41.7K | 79.63% | 79.63% | $165.46M | Nov 12, 2025 | NEW |
RENAISSANCE TECHNOLOGIES LLC pharmaceutical preparations | 25.2K | 48.24% | 48.24% | $100.23M | Nov 13, 2025 | NEW |
FIRST MANHATTAN CO. LLC. pharmaceutical preparations | 22.8K | 43.65% | 43.65% | $90.70M | Nov 14, 2025 | NEW |
STATE STREET CORP pharmaceutical preparations | 16.4K | 31.31% | 31.31% | $65.06M | Nov 14, 2025 | NEW |
GSA CAPITAL PARTNERS LLP pharmaceutical preparations | 12.9K | 24.62% | 24.62% | $51.00M | Nov 7, 2025 | NEW |
APOLLON WEALTH MANAGEMENT, LLC pharmaceutical preparations | 11.8K | 22.53% | 22.53% | $46.82M | Oct 17, 2025 | NEW |
NORTHERN TRUST CORP pharmaceutical preparations | 11.0K | 21.08% | 21.08% | $43.80M | Nov 14, 2025 | NEW |
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
0
Increased
+0 shares24
New Positions
first time holders2
Decreased
−1.41M shares24
Sold Out
fully exitedNet shares change (top 50)
1.41M
+0 / −1.41M
Net new holders
-2
24 new / 24 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
CLSD insider trading · insider activity
Source: SEC Form 4
Insiders have been net buyers of shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
4
Buy transactions
0
Sell transactions
0.00
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 |
|---|---|---|---|---|---|---|---|
WHITMORE BRADFORD T 10 percent owner | Aug 13, 2020 | Purchase | 50,000 | $1.65 | $82.6K | 2.95M | Form 4 ↗ |
WHITMORE BRADFORD T 10 percent owner | Aug 12, 2020 | Purchase | 300,000 | $1.63 | $489.1K | 2.90M | 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
Clearside Biomedical, Inc. (CLSD) is primarily owned by institutional investors, who hold approximately 10.3% of total shares outstanding. Company insiders own approximately 13.24%, while retail and public investors account for the remaining 76.43%.
The largest institutional shareholder of Clearside Biomedical, Inc. is VANGUARD GROUP INC, holding approximately 221,968 shares — equal to 4.24% of outstanding shares — as of September 30, 2025.
A total of 26 institutional investors currently hold CLSD stock, with a combined institutional value of approximately $2,137,412 as of the most recent 13F filing period.
Frequently asked questions
CLSD ownershipClearside Biomedical, Inc. (CLSD) is primarily owned by institutional investors, who hold approximately 10.3% of shares. The largest shareholder is VANGUARD GROUP INC with a 4.24% stake. Company insiders hold 13.24%. Data sourced from SEC Form 13F as of September 30, 2025.