Clearside Biomedical, Inc.
CLSDDelisted Dec 8, 2025- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0001539029
Clearside Biomedical, Inc. was delisted on Dec 8, 2025; its insiders filed their last Form 4 on Feb 24, 2025; 26 institutions reported holding it in 13F filings for Q3 2025, worth $2.18M in total; no superinvestor held it.
Open-market trades, last 90 days
Open-market purchases (P) and sales (S) by Clearside Biomedical, Inc. insiders, counted by Form 4 filing. Trades with a flagged price and duplicate filings are left out.
- Open-market buys
- 0 filings
- Open-market sells
- 0 filings
- Insiders trading
- 0
- Net value
- $0
- Purchases minus sales
Insider roster
Directors, officers and 10% owners who have filed a Form 4 for Clearside Biomedical, Inc., current and former, most recent filer first. Last reported holding is the position after the last non-derivative trade in their latest filing.
| Name | Title | Last reported holding | Last filing | Filings, past year |
|---|---|---|---|---|
| Thorp Clay | Director | 176,141 | Feb 24, 2025 | 0 |
| Lasezkay George M | CEO | 466,577 | Jan 10, 2025 | 0 |
| Deignan Charles A. | Chief Financial Officer | 384,662 | Jan 10, 2025 | 0 |
| Chong Ngai Hang Victor | Chief Medical Officer | 100,000 | Jan 10, 2025 | 0 |
| Yerxa Benjamin R | Director | 17,957 | Jun 21, 2024 | 0 |
| Shaffer Christy L | Director | – | Jun 21, 2024 | 0 |
| Edwards Jeffrey L | Director | – | Jun 21, 2024 | 0 |
| Hutson Nancy J | Director | 93,000 | Jun 21, 2024 | 0 |
| Croarkin Richard | Director | – | Jun 21, 2024 | 0 |
| Humphries William D. | Director | 51,040 | Jun 21, 2024 | 0 |
| Gibney Anthony S | Director | 100,000 | Jun 21, 2024 | 0 |
| Whitmore Bradford T | 10% Owner | 4,495,034 | Feb 9, 2024 | 0 |
| Ciulla Thomas | Chief Medical Officer | 291,890 | Jan 20, 2023 | 0 |
Insider trades
Each row adds up one type of transaction in one Form 4 filing. Only open-market purchases (P) and sales (S) are shown by default; use the filters to see grants, option exercises and other codes.
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| Feb 24, 2025 (view filing) | Feb 24 | Same day | Thorp ClayDirector | PPurchase | +15.0K | $0.92 | +$13.8K | +9.3%176.1K after | |
| Nov 4, 2024 (view filing) | Nov 1 | 3 days | Chong Ngai Hang VictorChief Medical Officer | PPurchase | +36.5K | $1.00 | +$36.5K | +57.5%100.0K after | |
| Jun 24, 2024 (view filing) | Jun 24 | Same day | Chong Ngai Hang VictorChief Medical Officer | PPurchase | +23.5K | $1.06 | +$24.9K | +58.8%63.5K after | |
| May 15, 2024 (view filing) | May 15 | Same day | Yerxa Benjamin RDirector | PPurchase | +7.81K | $1.31 | +$10.2K | +77.0%18.0K after | |
| Apr 19, 2024 (view filing) | Apr 17-18 | 2 days | Gibney Anthony SDirector | PPurchase | +100.0K | $1.30 | +$129.7K | New position100.0K after | 2 lots |
| Mar 20, 2024 (view filing) | Mar 20 | Same day | Chong Ngai Hang VictorCHIEF MEDICAL OFFICER | PPurchase | +30.0K | $1.60 | +$48.0K | New position30.0K after | |
| Feb 9, 2024 (view filing) | Feb 7 | 2 days | Whitmore Bradford T10% Owner | PPurchase | +444.4K | $1.35 | +$600.0K | +11.0%4.50M after | |
| Feb 9, 2024 (view filing) | Feb 7 | 2 days | Whitmore Bradford T10% Owner | PPurchase | +444.4K | $0.00 | $0 | –444.4K after | Derivative |
| Jan 19, 2024 (view filing) | Jan 19 | Same day | Lasezkay George MCEO | SSale | −18.0K | $1.27 | −$22.9K | −3.7%466.6K after | |
| Jan 19, 2024 (view filing) | Jan 19 | Same day | Deignan Charles A.Chief Financial Officer | SSale | −12.9K | $1.28 | −$16.5K | −3.2%384.7K after | |
| Nov 1, 2023 (view filing) | Oct 30-Nov 1 | 2 days | Whitmore Bradford T10% Owner | PPurchase | +135.8K | $0.7346 | +$99.7K | +3.5%4.05M after | 3 lots |
| Oct 4, 2023 (view filing) | Oct 3 | 1 day | Hutson Nancy JDirector | PPurchase | +10.0K | $0.86 | +$8.60K | +12.0%93.0K after | |
| Sep 25, 2023 (view filing) | Sep 25 | Same day | Thorp ClayDirector | PPurchase | +10.0K | $0.86 | +$8.60K | +32.8%40.5K after | |
| Jan 20, 2023 (view filing) | Jan 20 | Same day | Ciulla ThomasChief Medical Officer | SSale | −13.7K | $1.47 | −$20.1K | −4.5%291.9K after | |
| Jan 20, 2023 (view filing) | Jan 19 | 1 day | Lasezkay George MCEO | SSale | −20.0K | $1.46 | −$29.2K | −4.0%484.6K after | |
| Jan 20, 2023 (view filing) | Jan 19 | 1 day | Deignan Charles A.Chief Financial Officer | SSale | −14.0K | $1.50 | −$21.0K | −3.7%363.5K after | |
| Jan 11, 2023 (view filing) | Jan 10 | 1 day | Ciulla ThomasChief Medical Officer | SSale | −2.17K | $1.62 | −$3.52K | −0.7%305.6K after | |
| Dec 21, 2022 (view filing) | Dec 21 | Same day | Thorp ClayDirector | PPurchase | +14.0K | $1.02 | +$14.3K | +84.7%30.5K after | |
| Dec 19, 2022 (view filing) | Feb 10, 2021 | 677 days | Thorp ClayDirector | SSale | −32.9K | $4.43 | −$145.6K | −0.7%4.95M after | Amended |
| Nov 21, 2022 (view filing) | Nov 17 | 4 days | Hutson Nancy JDirector | PPurchase | +30.0K | $1.33 | +$39.9K | +56.6%83.0K after | |
| Jan 20, 2022 (view filing) | Jan 19 | 1 day | Ciulla ThomasChief Medical Officer | SSale | −9.05K | $2.13 | −$19.3K | −3.0%295.3K after | From original |
| Jan 20, 2022 (view filing) | Jan 19 | 1 day | Deignan Charles A.Chief Financial Officer | SSale | −8.83K | $2.09 | −$18.5K | −2.5%351.4K after | From original |
| Jan 20, 2022 (view filing) | Jan 19 | 1 day | Lasezkay George MCEO | SSale | −10.8K | $2.12 | −$22.9K | −2.1%504.6K after | |
| Jan 13, 2022 (view filing) | Jan 11 | 2 days | Lasezkay George MCEO | SSale | −5.10K | $2.46 | −$12.5K | −1.2%417.9K after | |
| Sep 23, 2021 (view filing) | Sep 21 | 2 days | Ciulla ThomasChief Medical Officer | SSale | −2.56K | $6.40 | −$16.4K | −1.0%255.6K after | |
| Sep 23, 2021 (view filing) | Sep 21 | 2 days | Lasezkay George MCEO | SSale | −3.52K | $6.46 | −$22.8K | −0.8%423.0K after | |
| Sep 23, 2021 (view filing) | Sep 21 | 2 days | Deignan Charles A.Chief Financial Officer | SSale | −2.80K | $6.41 | −$17.9K | −0.9%316.4K after | |
| Sep 1, 2021 (view filing) | Aug 30-Sep 1 | 2 days | Whitmore Bradford T10% Owner | SSale | −420.3K | $6.95 | −$2.92M | −14.8%2.42M after | 3 lots |
| Aug 17, 2021 (view filing) | Aug 16 | 1 day | Hutson Nancy JDirector | PPurchase | +3.00K | $5.68 | +$17.0K | +30.0%13.0K after |