Synopsys, Inc.
MX ˙ BMV ˙ US8716071076
SecurityMX:SNPS / Synopsys, Inc.
InstitutionRobeco Institutional Asset Management B.V.
Latest Disclosed Ownership459,234 shares
Latest Disclosed Value $ 182,077,097
Robeco Institutional Asset Management B.V. reports 169.37% increase in ownership of SNPS / Synopsys, Inc.

On April 21, 2026 - Robeco Institutional Asset Management B.V. filed a 13F-HR form disclosing ownership of 459,234 shares of Synopsys, Inc. (MX:SNPS) valued at $182,077,097 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 23, 2026 disclosing 170,487 shares of Synopsys, Inc.. This represents a change in shares of 169.37% 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)
2026-04-21 2026-03-31 13F SYNOPSYS COM 871607107 459,234 288,747 169.37 182,077 127.37 0.2595
2026-01-23 2025-12-31 13F SYNOPSYS COM 871607107 170,487 117,175 219.79 80,081 204.46 0.1140
2025-10-22 2025-09-30 13F SYNOPSYS COM 871607107 53,312 -126,312 -70.32 26,304 -71.44 0.0381
2025-07-18 2025-06-30 13F SYNOPSYS COM 871607107 179,624 134,979 302.34 92,090 380.98 0.1489
2025-04-23 2025-03-31 13F SYNOPSYS COM 871607107 44,645 -3,633 -7.53 19,146 -18.29 0.0372
2025-01-23 2024-12-31 13F SYNOPSYS COM 871607107 48,278 -15,819 -24.68 23,432 -27.81 0.0444
2024-10-29 2024-09-30 13F SYNOPSYS COM 871607107 64,097 -3,674 -5.42 32,458 -19.51 0.0645
2024-07-23 2024-06-30 13F SYNOPSYS COM 871607107 67,771 -188,746 -73.58 40,328 -72.49 0.0868
2024-04-24 2024-03-31 13F SYNOPSYS COM 871607107 256,517 6,641 2.66 146,599 13.94 0.3186
2024-02-14 2023-12-31 13F/A-1 SYNOPSYS COM 871607107 249,876 -30,464 -10.87 128,664 0.00 0.3119
2024-02-08 2023-12-31 13F SYNOPSYS COM 871607107 118,494 -161,846 250 0.0468
2023-10-24 2023-09-30 13F SYNOPSYS COM 871607107 280,340 1,891 0.68 128,668 6.13 0.3439
2023-07-24 2023-06-30 13F SYNOPSYS COM 871607107 278,449 -24,368 -8.05 121,239 3.66 0.3179
2023-05-04 2023-03-31 13F SYNOPSYS COM 871607107 302,817 -6,339 -2.05 116,963 18.49 0.3188
2023-02-07 2022-12-31 13F SYNOPSYS COM 871607107 309,156 51,854 20.15 98,710 25.58 0.2845
2022-12-01 2022-09-30 13F/A-1 SYNOPSYS COM 871607107 257,302 39,442 18.10 78,606 18.80 0.2540
2022-10-27 2022-09-30 13F SYNOPSYS COM 871607107 257,302 39,442 78,606 0.2506
2022-12-01 2022-06-30 13F/A-1 SYNOPSYS COM 871607107 217,860 -446 -0.20 66,166 -9.06 0.2056
2022-07-27 2022-06-30 13F SYNOPSYS COM 871607107 217,860 -446 66,166 0.2027
2022-12-01 2022-03-31 13F/A-1 SYNOPSYS COM 871607107 218,306 14,898 7.32 72,756 -2.94 0.1714
2022-04-26 2022-03-31 13F SYNOPSYS COM 871607107 218,306 14,898 72,756 0.1693
2022-12-01 2021-12-31 13F/A-1 SYNOPSYS COM 871607107 203,408 -9,630 -4.52 74,957 17.51 0.1595
2022-01-31 2021-12-31 13F SYNOPSYS COM 871607107 203,408 -9,630 74,957 0.1575
2022-12-01 2021-09-30 13F/A-1 SYNOPSYS COM 871607107 213,038 -15,138 -6.63 63,787 1.37 0.1414
2021-10-20 2021-09-30 13F SYNOPSYS COM 871607107 213,038 -15,138 63,787 0.1396
2022-12-01 2021-06-30 13F/A-1 SYNOPSYS COM 871607107 228,176 -109,787 -32.48 62,923 -24.86 0.1395
2021-07-28 2021-06-30 13F SYNOPSYS COM 871607107 228,176 -109,787 62,923 0.1376
2022-12-01 2021-03-31 13F/A-1 SYNOPSYS COM 871607107 337,963 -102,829 -23.33 83,740 -26.72 0.2064
2021-04-23 2021-03-31 13F SYNOPSYS COM 871607107 337,963 -102,829 83,740 0.2035
2022-12-01 2020-12-31 13F/A-1 SYNOPSYS COM 871607107 440,792 -17,624 -3.84 114,271 16.49 0.3003
2021-01-28 2020-12-31 13F SYNOPSYS COM 871607107 440,792 -17,624 114,271 0.2966
2021-01-19 2020-09-30 13F/A-1 SYNOPSYS COM 871607107 458,416 11,788 2.64 98,093 12.63 0.3032
2020-10-29 2020-09-30 13F SYNOPSYS COM 871607107 458,416 11,788 98,093 302,943.1093
2021-01-19 2020-06-30 13F/A-1 SYNOPSYS COM 871607107 446,628 -77,119 -14.72 87,094 29.12 0.2958
2020-07-20 2020-06-30 13F SYNOPSYS COM 871607107 446,628 -77,119 87,094 295,525.4768
2021-01-19 2020-03-31 13F/A-1 SYNOPSYS COM 871607107 523,747 -98,890 -15.88 67,451 -22.18 0.2706
2020-04-30 2020-03-31 13F SYNOPSYS COM 871607107 523,747 -98,890 67,451 270,358.8196
2021-01-19 2019-12-31 13F/A-1 SYNOPSYS COM 871607107 622,637 -4,066 -0.65 86,672 0.76 0.2775
2020-02-06 2019-12-31 13F SYNOPSYS COM 871607107 622,637 -4,066 86,672 277,213.7270
2021-01-19 2019-09-30 13F/A-1 SYNOPSYS COM 871607107 626,703 51,494 8.95 86,017 16.21 0.3037
2019-10-17 2019-09-30 13F SYNOPSYS COM 871607107 626,703 51,494 86,017 303,245.2997
2021-01-19 2019-06-30 13F/A-1 SYNOPSYS COM 871607107 575,209 15,564 2.78 74,019 14.85 0.2614
2019-07-19 2019-06-30 13F SYNOPSYS COM 871607107 575,209 15,564 74,019 261,010.3550
2021-01-19 2019-03-31 13F/A-1 SYNOPSYS COM 871607107 559,645 -40,257 -6.71 64,448 27.58 0.2370
2019-05-02 2019-03-31 13F SYNOPSYS COM 871607107 559,645 -40,257 64,448 236,630.1296
2021-01-19 2018-12-31 13F/A-1 SYNOPSYS COM 871607107 599,902 -80,549 -11.84 50,516 -24.72 0.2268
2019-02-08 2018-12-31 13F SYNOPSYS COM 871607107 599,902 -80,549 50,516 226,435.4667
2021-01-19 2018-09-30 13F/A-1 SYNOPSYS COM 871607107 680,451 -29,676 -4.18 67,101 10.43 0.2657
2018-10-25 2018-09-30 13F SYNOPSYS COM 871607107 680,323 -29,804 67,088
2021-01-19 2018-06-30 13F/A-1 SYNOPSYS COM 871607107 710,127 -6,322 -0.88 60,764 1.89 0.2768
2018-08-03 2018-06-30 13F SYNOPSYS COM 871607107 710,127 -6,322 60,764
2021-01-19 2018-03-31 13F/A-1 SYNOPSYS COM 871607107 716,449 -645,945 -47.41 59,639 -48.64 0.2798
2018-05-07 2018-03-31 13F SYNOPSYS COM 871607107 716,449 -645,945 59,639 278,903.7049
2021-01-19 2017-12-31 13F/A-1 SYNOPSYS COM 871607107 1,362,394 18,545 1.38 116,130 7.32 0.6018
2018-01-25 2017-12-31 13F SYNOPSYS COM 871607107 1,362,394 18,545 116,130
2021-01-19 2017-09-30 13F/A-1 SYNOPSYS COM 871607107 1,343,849 16,003 1.21 108,214 11.74 0.6720
2017-10-17 2017-09-30 13F SYNOPSYS COM 871607107 1,343,849 16,003 108,214 670,423.6926
2021-01-19 2017-06-30 13F/A-1 SYNOPSYS COM 871607107 1,327,846 174,140 15.09 96,841 16.37 0.6238
2017-08-07 2017-06-30 13F SYNOPSYS COM 871607107 1,327,846 174,140 96,841 630,512.9024
2021-01-19 2017-03-31 13F/A-1 SYNOPSYS COM 871607107 1,153,706 95,561 9.03 83,218 33.62 0.5541
2017-05-15 2017-03-31 13F SYNOPSYS COM 871607107 1,153,706 95,561 83,218 552,728.9306
2017-02-09 2016-12-31 13F SYNOPSYS COM 871607107 1,058,145 248,368 30.67 62,281 29.59 0.4872
2016-11-07 2016-09-30 13F SYNOPSYS COM 871607107 809,777 277,402 52.11 48,060 66.92 0.3552
2016-07-22 2016-06-30 13F SYNOPSYS COM 871607107 532,375 0 0.00 28,792 11.65 0.2183
2016-05-16 2016-03-31 13F SYNOPSYS COM 871607107 532,375 -487,958 -47.82 25,787 -44.59 0.2069
2016-02-08 2015-12-31 13F SYNOPSYS COM 871607107 1,020,333 106,652 11.67 46,537 10.30 0.3980
2015-11-12 2015-09-30 13F SYNOPSYS COM 871607107 913,681 41,400 4.75 42,192 -4.50 0.3214
2015-08-17 2015-06-30 13F SYNOPSYS COM 871607107 872,281 -28,803 -3.20 44,180 5.85 0.3354
2015-04-24 2015-03-31 13F SYNOPSYS COM 871607107 901,084 28,932 3.32 41,737 10.09 0.3138
2015-02-12 2014-12-31 13F SYNOPSYS COM 871607107 872,152 4,050 0.47 37,912 10.02 0.2718
2014-11-10 2014-09-30 13F SYNOPSYS COM 871607107 868,102 9,554 1.11 34,459 3.39 0.2461
2014-08-13 2014-06-30 13F SYNOPSYS COM 871607107 858,548 -458,880 -34.83 33,328 -34.14 0.2385
2014-05-07 2014-03-31 13F SYNOPSYS COM 871607107 1,317,428 59,311 4.71 50,603 -0.86 0.3882
2014-02-04 2013-12-31 13F SYNOPSYS COM 871607107 1,258,117 -82,263 -6.14 51,041 1.00 0.4241
2013-11-12 2013-09-30 13F SYNOPSYS COM 871607107 1,340,380 1,104,724 468.79 50,534 499.74 0.4909
2013-08-27 2013-06-30 13F Synopsys COM 871607107 235,656 235,656 8,426 0.0852
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.