Grid Dynamics Holdings, Inc.
US ˙ NasdaqCM ˙ US39813G1094

SecurityGDYN / Grid Dynamics Holdings, Inc.
InstitutionCitigroup Inc
Latest Disclosed Ownership287,128 shares
Latest Disclosed Value $ 1,636,629
Citigroup Inc reports 419.30% increase in ownership of GDYN / Grid Dynamics Holdings, Inc.

On May 11, 2026 - Citigroup Inc filed a 13F-HR form disclosing ownership of 287,128 shares of Grid Dynamics Holdings, Inc. (US:GDYN) valued at $1,636,630 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 55,291 shares of Grid Dynamics Holdings, Inc.. This represents a change in shares of 419.30% during the quarter. The current value of the position is $2,021,381 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)
2026-05-11 2026-03-31 13F GRID DYNAMICS HLDGS CL A 39813G109 287,128 231,837 419.30 1,637 227.86 0.0004
2026-02-13 2025-12-31 13F GRID DYNAMICS HLDGS CL A 39813G109 55,291 -190,276 -77.48 499 -73.64 0.0002
2025-11-10 2025-09-30 13F GRID DYNAMICS HLDGS CL A 39813G109 245,567 65,138 36.10 1,893 -9.12 0.0008
2025-08-11 2025-06-30 13F GRID DYNAMICS HLDGS CL A 39813G109 180,429 3,315 1.87 2,084 -24.83 0.0010
2025-05-12 2025-03-31 13F GRID DYNAMICS HLDGS CL A 39813G109 177,114 76,868 76.68 2,772 24.32 0.0014
2025-02-12 2024-12-31 13F GRID DYNAMICS HLDGS CL A 39813G109 100,246 37,135 58.84 2,229 152.43 0.0013
2024-11-12 2024-09-30 13F GRID DYNAMICS HLDGS CL A 39813G109 63,111 28,685 83.32 884 144.60 0.0005
2024-08-12 2024-06-30 13F GRID DYNAMICS HLDGS CL A 39813G109 34,426 3,213 10.29 362 -5.74 0.0002
2024-05-10 2024-03-31 13F GRID DYNAMICS HLDGS CL A 39813G109 31,213 1,922 6.56 384 -1.79 0.0003
2024-02-09 2023-12-31 13F GRID DYNAMICS HLDGS CL A 39813G109 29,291 8,756 42.64 390 56.00 0.0003
2023-12-06 2023-09-30 13F/A-1 GRID DYNAMICS HLDGS CL A 39813G109 20,535 -17,254 -45.66 250 -28.37 0.0002
2023-11-09 2023-09-30 13F GRID DYNAMICS HLDGS CL A 39813G109 20,535 -17,254 250 0.0001
2023-08-10 2023-06-30 13F GRID DYNAMICS HLDGS CL A 39813G109 37,789 16,493 77.45 350 43.03 0.0002
2023-05-11 2023-03-31 13F GRID DYNAMICS HLDGS CL A 39813G109 21,296 2,408 12.75 244 15.64 0.0002
2023-02-09 2022-12-31 13F GRID DYNAMICS HLDGS CL A 39813G109 18,888 -5,757 -23.36 212 -54.13 0.0002
2022-11-10 2022-09-30 13F GRID DYNAMICS HLDGS CL A 39813G109 24,645 4,608 23.00 460 36.90 0.0003
2022-08-10 2022-06-30 13F GRID DYNAMICS HLDGS CL A 39813G109 20,037 -1,200 -5.65 336 12.75 0.0003
2022-05-12 2022-03-31 13F GRID DYNAMICS HLDGS CL A 39813G109 21,237 -73,372 -77.55 298 -91.70 0.0002
2022-02-10 2021-12-31 13F GRID DYNAMICS HLDGS CL A 39813G109 94,609 70,501 292.44 3,592 410.95 0.0019
2021-11-10 2021-09-30 13F GRID DYNAMICS HLDGS CL A 39813G109 24,108 18,082 300.07 703 672.53 0.0004
2021-08-10 2021-06-30 13F GRID DYNAMICS HLDGS CL A 39813G109 6,026 1,167 24.02 91 18.18 0.0001
2021-05-13 2021-03-31 13F GRID DYNAMICS HLDGS CL A 39813G109 4,859 -3,275 -40.26 77 -24.51 0.0000
2021-02-11 2020-12-31 13F GRID DYNAMICS HLDGS CL A 39813G109 8,134 7,091 679.87 102 1,175.00 0.0001
2020-11-12 2020-09-30 13F GRID DYNAMICS HLDGS CL A 39813G109 1,043 -1,925 -64.86 8 -60.00 0.0000
2020-08-12 2020-06-30 13F GRID DYNAMICS HLDGS CL A 39813G109 2,968 -4,930 -62.42 20 -68.25 0.0000
2020-05-12 2020-03-31 13F GRID DYNAMICS HLDGS COM CL A 39813G109 7,898 7,898 63 0.0001
2019-08-12 2019-06-30 13F CHASERG TECHNLGY ACQUISITN C UNIT 09/30/2023 16166A202 0 -50,000 -100.00 0 -100.00
2019-05-13 2019-03-31 13F CHASERG TECHNLGY ACQUISITN C UNIT 09/30/2023 16166A202 50,000 0 0.00 505 1.00 0.0005
2019-02-12 2018-12-31 13F CHASERG TECHNLGY ACQUISITN C UNIT 09/30/2023 16166A202 50,000 50,000 500 0.0005
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.