Woodstock Corp ownership in ALDX / Aldeyra Therapeutics, Inc.

Aldeyra Therapeutics, Inc.

US ˙ NasdaqCM ˙ US01438T1060

Security	ALDX / Aldeyra Therapeutics, Inc.
Institution	Woodstock Corp
Latest Disclosed Ownership	266,756 shares
Latest Disclosed Value	$ 450,818

On April 8, 2026 - Woodstock Corp filed a 13F-HR form disclosing ownership of 266,756 shares of Aldeyra Therapeutics, Inc. (US:ALDX) valued at $450,818 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 14, 2026 disclosing 266,756 shares of Aldeyra Therapeutics, Inc.. This represents a change in shares of 0.00% during the quarter. The current value of the position is $496,166 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)

File Date	Effective Date	Form	Security	Class	ID	Reported Shares	ΔShares	ΔShares (%)	Reported Value (x1000)	ΔValue (%)	Alloc (%)
2026-04-08	2026-03-31	13F	Aldeyra Therapeutics	COMMON STOCK	01438T106	266,756	0	0.00	451	-67.41	0.0401
2026-01-14	2025-12-31	13F	Aldeyra Therapeutics	COMMON STOCK	01438T106	266,756	0	0.00	1,382	-0.79	0.1186
2025-10-07	2025-09-30	13F	Aldeyra Therapeutics	COMMON STOCK	01438T106	266,756	0	0.00	1,392	36.34	0.1207
2025-07-09	2025-06-30	13F	Aldeyra Therapeutics	COMMON STOCK	01438T106	266,756	43,662	19.57	1,022	-20.36	0.0939
2025-04-09	2025-03-31	13F	Aldeyra Therapeutics	COMMON STOCK	01438T106	223,094	28,175	14.45	1,283	31.89	0.1267
2025-01-15	2024-12-31	13F	Aldeyra Therapeutics	COMMON STOCK	01438T106	194,919	14,113	7.81	973	-0.21	0.0937
2024-10-11	2024-09-30	13F	Aldeyra Therapeutics	COMMON STOCK	01438T106	180,806	0	0.00	975	62.88	0.0938
2024-07-08	2024-06-30	13F	Aldeyra Therapeutics	COMMON STOCK	01438T106	180,806	10,091	5.91	598	7.17	0.0609
2024-04-09	2024-03-31	13F	Aldeyra Therapeutics	COMMON STOCK	01438T106	170,715	54,011	46.28	558	36.43	0.0578
2024-01-08	2023-12-31	13F	Aldeyra Therapeutics	COMMON STOCK	01438T106	116,704	-20,475	-14.93	410	-55.35	0.0474
2023-10-10	2023-09-30	13F	Aldeyra Therapeutics	COMMON STOCK	01438T106	137,179	0	0.00	916	-20.35	0.1149
2023-07-07	2023-06-30	13F	Aldeyra Therapeutics	COMMON STOCK	01438T106	137,179	0	0.00	1,151	-15.57	0.1358
2023-04-06	2023-03-31	13F	Aldeyra Therapeutics	COMMON STOCK	01438T106	137,179	0	0.00	1,362	42.77	0.1737
2023-01-10	2022-12-31	13F	Aldeyra Therapeutics	COMMON STOCK	01438T106	137,179	8,000	6.19	955	38.26	0.1269
2022-10-11	2022-09-30	13F	Aldeyra Therapeutics	COMMON STOCK	01438T106	129,179	24,445	23.34	690	65.07	0.1027
2022-07-11	2022-06-30	13F	Aldeyra Therapeutics	COMMON STOCK	01438T106	104,734	33,736	47.52	418	32.28	0.0580
2022-04-07	2022-03-31	13F	Aldeyra Therapeutics	COMMON STOCK	01438T106	70,998	70,998		316		0.0370
2022-01-07	2021-12-31	13F	Aldeyra Therapeutics	COMMON STOCK	01438T106	0	-148,072	-100.00	0	-100.00
2021-10-05	2021-09-30	13F	Aldeyra Therapeutics	COMMON STOCK	01438T106	148,072	0	0.00	1,300	-22.53	0.1516
2021-07-06	2021-06-30	13F	Aldeyra Therapeutics	COMMON STOCK	01438T106	148,072	0	0.00	1,678	-4.60	0.1974
2021-04-05	2021-03-31	13F	Aldeyra Therapeutics	COMMON STOCK	01438T106	148,072	0	0.00	1,759	73.13	0.2236
2021-01-06	2020-12-31	13F	Aldeyra Therapeutics	COMMON STOCK	01438T106	148,072	0	0.00	1,016	-7.38	0.1360
2020-10-02	2020-09-30	13F	Aldeyra Therapeutics	COMMON STOCK	01438T106	148,072	0	0.00	1,097	77.80	0.1772
2020-07-07	2020-06-30	13F	Aldeyra Therapeutics	COMMON STOCK	01438T106	148,072	14,286	10.68	617	86.97	0.1052
2020-04-03	2020-03-31	13F	Aldeyra Therapeutics	COMMON STOCK	01438T106	133,786	0	0.00	330	-57.53	0.0672
2020-01-13	2019-12-31	13F	Aldeyra Therapeutics	COMMON STOCK	01438T106	133,786	34,945	35.35	777	49.14	0.1266
2019-10-02	2019-09-30	13F	Aldeyra Therapeutics	COMMON STOCK	01438T106	98,841	0	0.00	521	-12.14	0.0908
2019-07-03	2019-06-30	13F	Aldeyra Therapeutics	COMMON STOCK	01438T106	98,841	0	0.00	593	-33.59	0.1035
2019-04-05	2019-03-31	13F	Aldeyra Therapeutics	COMMON STOCK	01438T106	98,841	8,756	9.72	893	19.39	0.1600
2019-01-08	2018-12-31	13F	Aldeyra Therapeutics	COMMON STOCK	01438T106	90,085	22,326	32.95	748	-20.00	0.1501
2018-10-03	2018-09-30	13F	Aldeyra Therapeutics	COMMON STOCK	01438T106	67,759	0	0.00	935	73.47	0.1580
2018-07-23	2018-06-30	13F	Aldeyra Therapeutics	COMMON STOCK	01438T106	67,759	0	0.00	539	6.10	0.0992
2018-04-19	2018-03-31	13F	Aldeyra Therapeutics	COMMON STOCK	01438T106	67,759	9,516	16.34	508	28.28	0.0961
2018-01-24	2017-12-31	13F	Aldeyra Therapeutics	COMMON STOCK	01438T106	58,243	9,850	20.35	396	13.79	0.0730
2017-10-06	2017-09-30	13F	Aldeyra Therapeutics	COMMON STOCK	01438T106	48,393	48,393		348		0.0663

Legend

Shares: The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value: The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price: The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class: This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred

Allocation (%): The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation: The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%): The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis: The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss: This is the market value of the position as of the effective date minus the cost basis.