Synopsys, Inc.
MX ˙ BMV ˙ US8716071076
SecurityMX:SNPS / Synopsys, Inc.
InstitutionAssenagon Asset Management S.A.
Latest Disclosed Ownership1,760,256 shares
Latest Disclosed Value $ 697,906,299
Assenagon Asset Management S.A. reports 48.31% increase in ownership of SNPS / Synopsys, Inc.

On April 20, 2026 - Assenagon Asset Management S.A. filed a 13F-HR form disclosing ownership of 1,760,256 shares of Synopsys, Inc. (MX:SNPS) valued at $697,906,299 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 9, 2026 disclosing 1,186,879 shares of Synopsys, Inc.. This represents a change in shares of 48.31% during the quarter.

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)
2026-04-20 2026-03-31 13F SYNOPSYS COM 871607107 1,760,256 573,377 48.31 697,906 25.18 1.0595
2026-01-09 2025-12-31 13F SYNOPSYS COM 871607107 1,186,879 944,973 390.64 557,501 367.10 0.7675
2025-10-07 2025-09-30 13F SYNOPSYS COM 871607107 241,906 227,537 1,583.53 119,354 1,520.34 0.1632
2025-07-11 2025-06-30 13F SYNOPSYS COM 871607107 14,369 -89,441 -86.16 7,367 -83.45 0.0109
2025-04-15 2025-03-31 13F SYNOPSYS COM 871607107 103,810 -112,887 -52.09 44,519 -57.67 0.0743
2025-01-14 2024-12-31 13F SYNOPSYS COM 871607107 216,697 14,802 7.33 105,176 2.87 0.1696
2024-10-23 2024-09-30 13F SYNOPSYS COM 871607107 201,895 37,422 22.75 102,238 4.46 0.1882
2024-07-18 2024-06-30 13F SYNOPSYS COM 871607107 164,473 -2,375 -1.42 97,871 2.64 0.2179
2024-04-24 2024-03-31 13F SYNOPSYS COM 871607107 166,848 -7,065 -4.06 95,354 6.48 0.2257
2024-01-17 2023-12-31 13F SYNOPSYS COM 871607107 173,913 88,483 103.57 89,550 128.39 0.2377
2023-11-06 2023-09-30 13F SYNOPSYS COM 871607107 85,430 25,690 43.00 39,210 50.74 0.1214
2023-07-25 2023-06-30 13F SYNOPSYS COM 871607107 59,740 6,229 11.64 26,011 25.85 0.0900
2023-04-18 2023-03-31 13F SYNOPSYS COM 871607107 53,511 -174,677 -76.55 20,669 28,605.56 0.0734
2023-01-12 2022-12-31 13F SYNOPSYS COM 871607107 228,188 89,620 64.68 73 -99.83 0.2628
2022-10-27 2022-09-30 13F SYNOPSYS COM 871607107 138,568 59,000 74.15 42,334 75.19 0.1625
2022-07-27 2022-06-30 13F SYNOPSYS COM 871607107 79,568 -18,762 -19.08 24,165 -26.26 0.0896
2022-04-25 2022-03-31 13F SYNOPSYS COM 871607107 98,330 64,686 192.27 32,770 164.32 0.0910
2022-02-01 2021-12-31 13F SYNOPSYS COM 871607107 33,644 -256,481 -88.40 12,398 -85.73 0.0359
2021-10-19 2021-09-30 13F SYNOPSYS COM 871607107 290,125 -164,067 -36.12 86,866 -30.65 0.2778
2021-07-15 2021-06-30 13F SYNOPSYS COM 871607107 454,192 370,630 443.54 125,262 504.98 0.4252
2021-04-26 2021-03-31 13F SYNOPSYS COM 871607107 83,562 -44,559 -34.78 20,705 -37.66 0.0840
2021-02-01 2020-12-31 13F SYNOPSYS COM 871607107 128,121 -10,183 -7.36 33,214 12.23 0.1447
2020-10-07 2020-09-30 13F SYNOPSYS COM 871607107 138,304 138,304 29,594 0.1660
2020-07-21 2020-06-30 13F SYNOPSYS COM 871607107 0 -82,749 -100.00 0 -100.00
2020-04-17 2020-03-31 13F SYNOPSYS COM 871607107 82,749 -60,265 -42.14 10,657 -46.47 0.0853
2020-01-17 2019-12-31 13F SYNOPSYS COM 871607107 143,014 140,013 4,665.54 19,908 4,732.04 0.1252
2019-10-16 2019-09-30 13F SYNOPSYS COM 871607107 3,001 -94,022 -96.91 412 -96.70 0.0028
2019-08-12 2019-06-30 13F SYNOPSYS COM 871607107 97,023 -36,349 -27.25 12,486 -18.70 0.0938
2019-04-26 2019-03-31 13F SYNOPSYS COM 871607107 133,372 -369,748 -73.49 15,358 -63.76 0.1441
2019-01-23 2018-12-31 13F SYNOPSYS COM 871607107 503,120 275,301 120.84 42,383 88.66 0.4801
2018-10-29 2018-09-30 13F SYNOPSYS COM 871607107 227,819 -157,428 -40.86 22,465 -31.85 0.2217
2018-07-17 2018-06-30 13F SYNOPSYS COM 871607107 385,247 385,247 32,966 0.3805
2018-01-25 2017-12-31 13F SYNOPSYS COM 871607107 0 -425,182 -100.00 0 -100.00
2017-10-18 2017-09-30 13F SYNOPSYS COM 871607107 425,182 425,182 34,240 0.3180
2017-07-19 2017-06-30 13F SYNOPSYS COM 871607107 0 -63,018 -100.00 0 -100.00
2017-05-04 2017-03-31 13F SYNOPSYS COM 871607107 63,018 -743,622 -92.19 4,545 -90.43 0.0972
2017-02-27 2016-12-31 13F SYNOPSYS COM 871607107 806,640 806,640 47,479 0.8865
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.