Coherent Corp.
MX ˙ BMV ˙ US19247G1076
SecurityMX:COHR / Coherent Corp.
InstitutionZweig-DiMenna Associates LLC
Latest Disclosed Ownership116,750 shares
Latest Disclosed Value $ 27,811,018
Zweig-DiMenna Associates LLC reports 51.82% increase in ownership of COHR / Coherent Corp.

On May 5, 2026 - Zweig-DiMenna Associates LLC filed a 13F-HR form disclosing ownership of 116,750 shares of Coherent Corp. (MX:COHR) valued at $27,811,018 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 76,900 shares of Coherent Corp.. This represents a change in shares of 51.82% 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)
2026-05-05 2026-03-31 13F COHERENT COM 19247G107 116,750 39,850 51.82 27,811 95.95 3.8507
2026-02-10 2025-12-31 13F COHERENT COM 19247G107 76,900 76,900 14,193 0.8809
2024-07-24 2024-06-30 13F COHERENT COM 19247G107 0 -159,808 -100.00 0 -100.00
2024-04-29 2024-03-31 13F COHERENT COM 19247G107 159,808 0 0.00 9,688 39.26 0.8460
2024-01-25 2023-12-31 13F COHERENT COM 19247G107 159,808 88,034 122.65 6,956 197.01 0.7846
2023-10-25 2023-09-30 13F COHERENT COM 19247G107 71,774 16,049 28.80 2,343 -17.54 0.2776
2023-07-26 2023-06-30 13F COHERENT COM 19247G107 55,725 29,635 113.59 2,841 186.00 0.3550
2023-04-28 2023-03-31 13F COHERENT COM 19247G107 26,090 -32,602 -55.55 994 -51.80 0.1344
2023-02-07 2022-12-31 13F COHERENT COM 19247G107 58,692 0 0.00 2,060 0.73 0.3001
2022-10-28 2022-09-30 13F COHERENT COM 19247G107 58,692 58,692 2,045 0.4452
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.