Synopsys, Inc.
US ˙ NasdaqGS ˙ US8716071076

SecuritySNPS / Synopsys, Inc.
InstitutionFirst Manhattan Co
Latest Disclosed Ownership848,592 shares
Latest Disclosed Value $ 336,449,800
First Manhattan Co reports 8.16% increase in ownership of SNPS / Synopsys, Inc.

On May 15, 2026 - First Manhattan Co filed a 13F-HR form disclosing ownership of 848,592 shares of Synopsys, Inc. (US:SNPS) valued at $336,449,756 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 784,551 shares of Synopsys, Inc.. This represents a change in shares of 8.16% during the quarter. The current value of the position is $422,615,788 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)
2026-05-15 2026-03-31 13F SYNOPSYS COM 871607107 848,592 64,041 8.16 336,450 -8.70 0.9330
2026-02-17 2025-12-31 13F SYNOPSYS COM 871607107 784,551 103,560 15.21 368,519 9.68 0.9676
2025-11-14 2025-09-30 13F SYNOPSYS COM 871607107 680,991 631,673 1,280.82 335,994 1,228.88 0.8874
2025-08-14 2025-06-30 13F SYNOPSYS COM 871607107 49,318 48,572 6,510.99 25,284 7,826.02 0.0714
2025-05-15 2025-03-31 13F SYNOPSYS COM 871607107 746 -5 -0.67 320 -12.36 0.0009
2025-02-14 2024-12-31 13F SYNOPSYS COM 871607107 751 -4 -0.53 365 -4.71 0.0011
2024-11-14 2024-09-30 13F SYNOPSYS COM 871607107 755 189 33.39 382 13.69 0.0011
2024-08-15 2024-06-30 13F/A-1 SYNOPSYS COM 871607107 566 -1,960 -77.59 337 -76.72 0.0011
2024-08-14 2024-06-30 13F SYNOPSYS COM 871607107 566 -1,960 337 0.0011
2024-05-15 2024-03-31 13F SYNOPSYS COM 871607107 2,526 1,605 174.27 1,444 204.43 0.0047
2024-02-13 2023-12-31 13F SYNOPSYS COM 871607107 921 514 126.29 474 154.84 0.0016
2023-11-14 2023-09-30 13F SYNOPSYS COM 871607107 407 -25 -5.79 187 -1.06 0.0007
2023-08-14 2023-06-30 13F SYNOPSYS COM 871607107 432 0 0.00 188 13.25 0.0007
2023-05-15 2023-03-31 13F SYNOPSYS COM 871607107 432 0 0.00 167 21.17 0.0006
2023-02-14 2022-12-31 13F SYNOPSYS COM 871607107 432 25 6.14 138 10.48 0.0005
2022-11-14 2022-09-30 13F SYNOPSYS COM 871607107 407 0 0.00 124 0.81 0.0005
2022-08-15 2022-06-30 13F SYNOPSYS COM 871607107 407 0 0.00 123 -8.89 0.0005
2022-05-16 2022-03-31 13F SYNOPSYS COM 871607107 407 0 0.00 135 -9.40 0.0004
2022-02-14 2021-12-31 13F SYNOPSYS COM 871607107 407 0 0.00 149 23.14 0.0005
2021-11-15 2021-09-30 13F SYNOPSYS COM 871607107 407 -22 -5.13 121 2.54 0.0004
2021-08-16 2021-06-30 13F SYNOPSYS COM 871607107 429 22 5.41 118 18.00 0.0004
2021-05-14 2021-03-31 13F SYNOPSYS COM 871607107 407 0 0.00 100 -4.76 0.0004
2021-02-16 2020-12-31 13F SYNOPSYS COM 871607107 407 0 0.00 105 20.69 0.0005
2020-11-12 2020-09-30 13F SYNOPSYS COMMON 871607107 407 0 0.00 87 10.13 0.0004
2020-08-14 2020-06-30 13F SYNOPSYS COMMON 871607107 407 0 0.00 79 51.92 0.0005
2020-05-06 2020-03-31 13F SYNOPSYS COMMON 871607107 407 407 52 0.0003
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.