허드슨 테크놀로지스, Inc.
US ˙ NasdaqCM ˙ US4441441098

SecurityHDSN / Hudson Technologies, Inc.
InstitutionUBS Group AG
Latest Disclosed Ownership42,475 shares
Latest Disclosed Value $ 249,753
UBS Group AG reports 68.79% decrease in ownership of HDSN / Hudson Technologies, Inc.

On May 5, 2026 - UBS Group AG filed a 13F-HR form disclosing ownership of 42,475 shares of Hudson Technologies, Inc. (US:HDSN) valued at $249,753 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 29, 2026 disclosing 136,088 shares of Hudson Technologies, Inc.. This represents a change in shares of -68.79% during the quarter. The current value of the position is $233,612 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 Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-05 2026-03-31 13F HUDSON TECHNOLOGIES COM 444144109 42,475 -93,613 -68.79 250 -73.28 0.0000
2026-01-29 2025-12-31 13F HUDSON TECHNOLOGIES COM 444144109 136,088 2,268 1.69 932 -29.82 0.0000
2025-11-13 2025-09-30 13F HUDSON TECHNOLOGIES COM 444144109 133,820 25,862 23.96 1,329 51.60 0.0002
2025-08-14 2025-06-30 13F HUDSON TECHNOLOGIES COM 444144109 107,958 23,278 27.49 877 67.82 0.0002
2025-05-13 2025-03-31 13F HUDSON TECHNOLOGIES COM 444144109 84,680 29,673 53.94 522 70.59 0.0001
2025-02-14 2024-12-31 13F HUDSON TECHNOLOGIES COM 444144109 55,007 -851,757 -93.93 307 -95.95 0.0001
2024-11-14 2024-09-30 13F HUDSON TECHNOLOGIES COM 444144109 906,764 294,554 48.11 7,562 40.53 0.0016
2024-08-14 2024-06-30 13F HUDSON TECHNOLOGIES COM 444144109 612,210 541,137 761.38 5,381 588.11 0.0013
2024-05-13 2024-03-31 13F HUDSON TECHNOLOGIES COM 444144109 71,073 -3,958 -5.28 783 -22.73 0.0002
2024-02-09 2023-12-31 13F HUDSON TECHNOLOGIES COM 444144109 75,031 31,814 73.61 1,012 76.31 0.0003
2023-11-09 2023-09-30 13F HUDSON TECHNOLOGIES COM 444144109 43,217 437 1.02 575 39.66 0.0002
2023-08-11 2023-06-30 13F HUDSON TECHNOLOGIES COM 444144109 42,780 6,574 18.16 412 30.06 0.0001
2023-05-12 2023-03-31 13F HUDSON TECHNOLOGIES COM 444144109 36,206 8,392 30.17 316 12.46 0.0001
2023-02-08 2022-12-31 13F HUDSON TECHNOLOGIES COM 444144109 27,814 4,683 20.25 281 65.29 0.0001
2022-11-10 2022-09-30 13F HUDSON TECHNOLOGIES COM 444144109 23,131 20,178 683.31 170 672.73 0.0001
2022-08-10 2022-06-30 13F HUDSON TECHNOLOGIES COM 444144109 2,953 796 36.90 22 69.23 0.0000
2022-05-16 2022-03-31 13F HUDSON TECHNOLOGIES COM 444144109 2,157 32 1.51 13 44.44 0.0000
2022-02-14 2021-12-31 13F HUDSON TECHNOLOGIES COM 444144109 2,125 1,585 293.52 9 350.00 0.0000
2021-11-15 2021-09-30 13F HUDSON TECHNOLOGIES COM 444144109 540 -5,280 -90.72 2 -90.00 0.0000
2021-08-13 2021-06-30 13F HUDSON TECHNOLOGIES COM 444144109 5,820 -7,858 -57.45 20 -9.09 0.0000
2021-05-12 2021-03-31 13F HUDSON TECHNOLOGIES COM 444144109 13,678 13,278 3,319.50 22 0.0000
2021-02-11 2020-12-31 13F HUDSON TECHNOLOGIES COM 444144109 400 -43,247 -99.08 0 -100.00
2020-11-12 2020-09-30 13F HUDSON TECHNOLOGIES COM 444144109 43,647 895 2.09 50 16.28 0.0000
2020-07-31 2020-06-30 13F HUDSON TECHNOLOGIES COM 444144109 42,752 -8,409 -16.44 43 22.86 0.0000
2020-05-01 2020-03-31 13F HUDSON TECHNOLOGIES COM 444144109 51,161 -5,071 -9.02 35 -36.36 0.0000
2020-02-14 2019-12-31 13F HUDSON TECHNOLOGIES COM 444144109 56,232 37,571 201.33 55 292.86 0.0000
2019-11-14 2019-09-30 13F HUDSON TECHNOLOGIES COM 444144109 18,661 17,811 2,095.41 14 1,300.00 0.0000
2019-08-14 2019-06-30 13F HUDSON TECHNOLOGIES COM 444144109 850 0 0.00 1 -50.00 0.0000
2019-05-14 2019-03-31 13F HUDSON TECHNOLOGIES COM 444144109 850 -2,958 -77.68 2 -50.00 0.0000
2019-02-14 2018-12-31 13F HUDSON TECHNOLOGIES COM 444144109 3,808 2,520 195.65 4 300.00 0.0000
2018-11-14 2018-09-30 13F HUDSON TECHNOLOGIES COM 444144109 1,288 -1,167 -47.54 1 -80.00 0.0000
2018-08-14 2018-06-30 13F HUDSON TECHNOLOGIES COM 444144109 2,455 805 48.79 5 -37.50 0.0000
2018-05-15 2018-03-31 13F HUDSON TECHNOLOGIES COM 444144109 1,650 -1,794 -52.09 8 -61.90 0.0000
2018-02-14 2017-12-31 13F HUDSON TECHNOLOGIES COM 444144109 3,444 -72,220 -95.45 21 -96.45 0.0000
2017-11-14 2017-09-30 13F HUDSON TECHNOLOGIES COM 444144109 75,664 22,730 42.94 591 32.21 0.0003
2017-11-14 2017-06-30 13F/A-1 HUDSON TECHNOLOGIES COM 444144109 52,934 42,280 396.85 447 538.57 0.0002
2017-08-14 2017-06-30 13F HUDSON TECHNOLOGIES COM 444144109 52,934 42,280 447
2017-11-14 2017-03-31 13F/A-1 HUDSON TECHNOLOGIES COM 444144109 10,654 -34,480 -76.39 70 -80.66 0.0000
2017-05-12 2017-03-31 13F HUDSON TECHNOLOGIES COM 444144109 10,654 -34,480 70
2017-02-14 2016-12-31 13F HUDSON TECHNOLOGIES COM 444144109 45,134 6,800 17.74 362 41.96 0.0002
2016-11-14 2016-09-30 13F HUDSON TECHNOLOGIES COM 444144109 38,334 3,264 9.31 255 102.38 0.0002
2016-08-12 2016-06-30 13F HUDSON TECHNOLOGIES COM 444144109 35,070 -2,300 -6.15 126 3.28 0.0001
2016-05-12 2016-03-31 13F HUDSON TECHNOLOGIES COM 444144109 37,370 2,886 8.37 122 19.61 0.0001
2016-02-16 2015-12-31 13F HUDSON TECHNOLOGIES COM 444144109 34,484 -2,299 -6.25 102 -6.42 0.0001
2015-11-13 2015-09-30 13F HUDSON TECHNOLOGIES COM 444144109 36,783 5,960 19.34 109 0.93 0.0001
2015-08-14 2015-06-30 13F HUDSON TECHNOLOGIES COM 444144109 30,823 -1,310 -4.08 108 -19.40 0.0001
2015-05-14 2015-03-31 13F HUDSON TECHNOLOGIES COM 444144109 32,133 3,649 12.81 134 25.23 0.0001
2015-02-17 2014-12-31 13F HUDSON TECHNOLOGIES COM 444144109 28,484 28,484 107 0.0001
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.