Why insider trading matters?

When insiders buy shares on the open market, this can thus be regarded as a strong endorsement by those that know the company the best -- they are literally betting their own money on the company's future. Insider selling, however, is not necessarily meaningful in any way, as there is a range of reasons for insiders to liquidate (some) of the shares they own.

- Seeking Alpha
Aldeyra Therapeutics, Inc. (ALDX)
Sector: Healthcare; Industry: Biotechnology

Aldeyra Therapeutics, Inc., a biotechnology company, develops and commercializes medicines for immune-mediated ocular and systemic diseases. The company's lead product candidate is reproxalap, an ophthalmic solution, which is in Phase III clinical trial for the treatment of dry eye diseases and allergic conjunctivitis. It also develops ADX-2191, a dihydrofolate reductase inhibitor which is in phase 3 for the prevention of proliferative vitreoretinopathy, a sight-threatening retinal disease.


Trade Date Insider Title Buy/Sell #Shares Price Value Option
2021-01-19 PERCEPTIVE ADVISORS LLC 10%-Owner Buy 1,368,421 $9.50 $13,000,000 No
2021-01-08 PERCEPTIVE ADVISORS LLC 10%-Owner Buy 1,050,000 $8.76 $9,202,668 No
2020-07-09 PERCEPTIVE ADVISORS LLC 10%-Owner Buy 3,200,000 $4.25 $13,600,000 No
2020-03-16 DOUGLAS RICHARD Director Buy 40,000 $2.75 $110,000 No
2019-12-16 Brady Todd C President and CEO Buy 20,000 $5.10 $101,908 No
2019-09-30 Brady Todd C President and CEO Buy 8,710 $5.68 $49,483 No
2019-09-23 Brady Todd C President and CEO Buy 8,680 $5.81 $50,433 No
2019-09-18 Brady Todd C President and CEO Buy 14,288 $5.91 $84,465 No
2019-09-17 Bronstein Ben Director Buy 1,700 $5.85 $9,945 No
2019-09-16 Brady Todd C President and CEO Buy 21,547 $5.91 $127,449 No
2019-09-13 DOUGLAS RICHARD Director Buy 5,000 $6.00 $30,000 No
2019-09-16 Brady Todd C President and CEO Buy 13,000 $5.85 $75,990 No
2019-09-12 JOYCE MARTIN JOSEPH Director Buy 1,700 $5.86 $9,964 No
2019-09-12 DOUGLAS RICHARD Director Buy 20,000 $5.89 $117,805 No
2019-09-10 Brady Todd C President and CEO Buy 20,000 $5.14 $102,824 No
2019-09-10 DOUGLAS RICHARD Director Buy 20,000 $5.00 $99,963 No
2019-09-06 Clark David J Chief Medical Officer Buy 5,000 $5.06 $25,311 No
2019-09-05 Reed Joshua Chief Financial Officer Buy 3,200 $4.71 $15,072 No
2019-09-05 McMullin David Chief Commerical Officer Buy 4,329 $4.68 $20,260 No
2019-03-26 TREU JESSE I Director Sell 96,743 $10.01 $968,397 No
2017-09-19 PERCEPTIVE ADVISORS LLC 10%-Owner Buy 200,000 $7.25 $1,450,000 No
2017-06-30 PERCEPTIVE ADVISORS LLC 10%-Owner Buy 296,007 $4.60 $1,361,632 No
2017-02-17 DOUGLAS RICHARD Director Buy 40,000 $4.50 $180,000 No
2017-02-17 Brady Todd C President and CEO Buy 22,223 $4.50 $100,004 No
2017-02-17 Bronstein Ben Director Buy 4,444 $4.50 $19,998 No
2017-02-17 JOYCE MARTIN JOSEPH Director Buy 4,444 $4.50 $19,998 No
2017-02-17 Tulipano Stephen J Chief Financial Officer Buy 3,333 $4.50 $14,998 No
2017-02-14 PERCEPTIVE ADVISORS LLC 10%-Owner Buy 893,025 $4.50 $4,018,612 No
2016-05-26 PERCEPTIVE ADVISORS LLC 10%-Owner Buy 700,000 $5.00 $3,500,000 No
2015-10-28 PERCEPTIVE ADVISORS LLC 10%-Owner Buy 45,100 $6.50 $293,150 No

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