# EDGAR Filing Document

**Accession Number:** 0001040508
**File Stem:** 0001193125-25-278400
**Filing Date:** 2025-11
**Character Count:** 19455
**Document Hash:** 83f5df334c454c78d2b9e25ad943e2f0
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-25-278400.hdr.sgml**: 20251112

**ACCESSION NUMBER**: 0001193125-25-278400

**CONFORMED SUBMISSION TYPE**: 4

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20251107

**FILED AS OF DATE**: 20251112

**DATE AS OF CHANGE**: 20251112

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Bain Capital Partners XII, LLC
- **CENTRAL INDEX KEY:** 0001830424

**ORGANIZATION NAME:**
- **STATE OF INCORPORATION:** E9
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-39375
- **FILM NUMBER:** 251475091

**BUSINESS ADDRESS:**
- **STREET 1:** 200 CLARENDON STREET
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02116
- **BUSINESS PHONE:** 6175162000

**MAIL ADDRESS:**
- **STREET 1:** 200 CLARENDON STREET
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02116
**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** BAIN CAPITAL INVESTORS LLC
- **CENTRAL INDEX KEY:** 0001040508

**ORGANIZATION NAME:**
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-39375
- **FILM NUMBER:** 251475093

**BUSINESS ADDRESS:**
- **STREET 1:** 200 CLARENDON STREET
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02116
- **BUSINESS PHONE:** 617-516-2000

**MAIL ADDRESS:**
- **STREET 1:** 200 CLARENDON STREET
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02116
**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Bain Capital Fund XII, LP
- **CENTRAL INDEX KEY:** 0001706270

**ORGANIZATION NAME:**
- **STATE OF INCORPORATION:** E9
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-39375
- **FILM NUMBER:** 251475092

**BUSINESS ADDRESS:**
- **STREET 1:** 200 CLARENDON STREET
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02116
- **BUSINESS PHONE:** 6175162000

**MAIL ADDRESS:**
- **STREET 1:** 200 CLARENDON STREET
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02116
**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** BCPE Watson (DE) Aggregator GP, LLC
- **CENTRAL INDEX KEY:** 0001911154

**ORGANIZATION NAME:**
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-39375
- **FILM NUMBER:** 251475090

**BUSINESS ADDRESS:**
- **STREET 1:** 200 CLARENDON STREET
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02116
- **BUSINESS PHONE:** 6175162000

**MAIL ADDRESS:**
- **STREET 1:** 200 CLARENDON STREET
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02116
**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** BCPE Watson (DE) BML GP, LLC
- **CENTRAL INDEX KEY:** 0001910886

**ORGANIZATION NAME:**
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-39375
- **FILM NUMBER:** 251475088

**BUSINESS ADDRESS:**
- **STREET 1:** 200 CLARENDON STREET
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02116
- **BUSINESS PHONE:** 6175162000

**MAIL ADDRESS:**
- **STREET 1:** 200 CLARENDON STREET
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02116
**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** BCPE Watson (DE) BML, LP
- **CENTRAL INDEX KEY:** 0001910890

**ORGANIZATION NAME:**
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-39375
- **FILM NUMBER:** 251475087

**BUSINESS ADDRESS:**
- **STREET 1:** 200 CLARENDON STREET
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02116
- **BUSINESS PHONE:** 6175162000

**MAIL ADDRESS:**
- **STREET 1:** 200 CLARENDON STREET
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02116
**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** BCPE Watson (DE) Aggregator, LP
- **CENTRAL INDEX KEY:** 0001911143

**ORGANIZATION NAME:**
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-39375
- **FILM NUMBER:** 251475089

**BUSINESS ADDRESS:**
- **STREET 1:** 200 CLARENDON STREET
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02116
- **BUSINESS PHONE:** 6175162000

**MAIL ADDRESS:**
- **STREET 1:** 200 CLARENDON STREET
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02116
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** COHERENT CORP.
- **CENTRAL INDEX KEY:** 0000820318
- **STANDARD INDUSTRIAL CLASSIFICATION:** OPTICAL INSTRUMENTS & LENSES [3827]
- **ORGANIZATION NAME:** 08 Industrial Applications and Services
- **EIN:** 251214948
- **STATE OF INCORPORATION:** PA
- **FISCAL YEAR END:** 0630

**BUSINESS ADDRESS:**
- **STREET 1:** 375 SAXONBURG BLVD
- **CITY:** SAXONBURG
- **STATE:** PA
- **ZIP:** 16056
- **BUSINESS PHONE:** 724-352-4455

**MAIL ADDRESS:**
- **STREET 1:** 375 SAXONBURG BLVD
- **CITY:** SAXONBURG
- **STATE:** PA
- **ZIP:** 16056

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** II-VI INC
- **DATE OF NAME CHANGE:** 19920703

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## FORM 4

### STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

[ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

[ ] Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>BAIN CAPITAL INVESTORS LLC<br><sub>(Last) (First) (Middle)</sub><br>200 CLARENDON STREET<br><sub>(Street)</sub><br>BOSTON, MA 02116<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2025-11-07 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[ ] Director [X] 10% Owner<br>[ ] Officer (give title below) [ ] Other (specify below)<br>_ _ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>COHERENT CORP. [ COHR ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[ ] Form filed by One Reporting Person<br>[X] Form filed by More than One Reporting Person |

---

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>Bain Capital Fund XII, LP<br><sub>(Last) (First) (Middle)</sub><br>200 CLARENDON STREET<br><sub>(Street)</sub><br>BOSTON, MA 02116<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2025-11-07 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[ ] Director [X] 10% Owner<br>[ ] Officer (give title below) [ ] Other (specify below)<br>_ _ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>COHERENT CORP. [ COHR ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[ ] Form filed by One Reporting Person<br>[X] Form filed by More than One Reporting Person |

---

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>Bain Capital Partners XII, LLC<br><sub>(Last) (First) (Middle)</sub><br>200 CLARENDON STREET<br><sub>(Street)</sub><br>BOSTON, MA 02116<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2025-11-07 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[ ] Director [X] 10% Owner<br>[ ] Officer (give title below) [ ] Other (specify below)<br>_ _ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>COHERENT CORP. [ COHR ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[ ] Form filed by One Reporting Person<br>[X] Form filed by More than One Reporting Person |

---

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>BCPE Watson (DE) Aggregator GP, LLC<br><sub>(Last) (First) (Middle)</sub><br>200 CLARENDON STREET<br><sub>(Street)</sub><br>BOSTON, MA 02116<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2025-11-07 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[ ] Director [X] 10% Owner<br>[ ] Officer (give title below) [ ] Other (specify below)<br>_ _ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>COHERENT CORP. [ COHR ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[ ] Form filed by One Reporting Person<br>[X] Form filed by More than One Reporting Person |

---

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>BCPE Watson (DE) Aggregator, LP<br><sub>(Last) (First) (Middle)</sub><br>200 CLARENDON STREET<br><sub>(Street)</sub><br>BOSTON, MA 02116<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2025-11-07 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[ ] Director [X] 10% Owner<br>[ ] Officer (give title below) [ ] Other (specify below)<br>_ _ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>COHERENT CORP. [ COHR ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[ ] Form filed by One Reporting Person<br>[X] Form filed by More than One Reporting Person |

---

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>BCPE Watson (DE) BML GP, LLC<br><sub>(Last) (First) (Middle)</sub><br>200 CLARENDON STREET<br><sub>(Street)</sub><br>BOSTON, MA 02116<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2025-11-07 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[ ] Director [X] 10% Owner<br>[ ] Officer (give title below) [ ] Other (specify below)<br>_ _ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>COHERENT CORP. [ COHR ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[ ] Form filed by One Reporting Person<br>[X] Form filed by More than One Reporting Person |

---

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>BCPE Watson (DE) BML, LP<br><sub>(Last) (First) (Middle)</sub><br>200 CLARENDON STREET<br><sub>(Street)</sub><br>BOSTON, MA 02116<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2025-11-07 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[ ] Director [X] 10% Owner<br>[ ] Officer (give title below) [ ] Other (specify below)<br>_ _ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>COHERENT CORP. [ COHR ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[ ] Form filed by One Reporting Person<br>[X] Form filed by More than One Reporting Person |

---

## Table I - Non-Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | 3. Transaction Code (V) | 3. Transaction Code (V) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | Code | V | Amount | (A) or (D) | Price | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| Common Stock | 2025-11-07 |  | C<sup>(1)(2)(3)</sup> |  | 7754252 | A | <sup>(1)(2)(3)</sup> | 7754252 | I | See footnotes<sup>(4)(5)</sup> |
| Common Stock | 2025-11-07 |  | S |  | 7500000 | D | $143.37 | 254252 | I | See footnotes<sup>(4)(5)</sup> |
| Common Stock | 2025-11-10 |  | J<sup>(6)</sup> |  | 254252 | D | <sup>(6)</sup> | 0 | I | See footnotes<sup>(4)(5)</sup> |

---

## Table II - Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | 4. Transaction Code (V) | 4. Transaction Code (V) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 6. Date Exercisable and Expiration Date | 6. Date Exercisable and Expiration Date | 7. Title and Amount of Underlying Securities | 7. Title and Amount of Underlying Securities | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | Code | V | (A) | (D) | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| Series B-1 Convertible Preferred Stock | <sup>(1)(2)(3)</sup> | 2025-11-07 |  | C |  |  | 54023 | <sup>(1)(2)(3)</sup> | <sup>(1)(2)(3)</sup> | Common Stock | 7754252 | <sup>(1)(2)(3)</sup> | 20977 | I | See footnotes<sup>(4)(5)</sup> |

---

### Footnotes:

(1) On November 7, 2025, the Reporting Persons converted 54,023 shares of Series B-1 Convertible Preferred Stock ("Series B-1 Preferred Stock" and, together with the Series B-2 Convertible Preferred Stock, the "Series B Preferred Stock") into 7,754,253 shares of Common Stock.  Series B-1 Preferred Stock was issued on March 31, 2021 pursuant to the Statement with Respect to Shares setting forth the terms of the Series B Convertible Preferred Stock filed with the Pennsylvania Department of State Corporations Bureau and effective March 30, 2021 (the "Statement with Respect to Shares"). Subject to adjustments set forth in the Statement with Respect to Shares, from the issuance date of such share, dividends accrue daily on the applicable stated value of each share of the Series B Preferred Stock at 5% per annum with an initial stated value of $10,000 per share.

(2) Until the fourth anniversary of the applicable issuance date, all dividend payments are compounded and added to the applicable stated value on a quarterly basis (a "PIK Dividend"). Following the fourth anniversary of the applicable issuance date, dividends will be payable in the form of, at the Issuer's sole discretion, (i) cash, (ii) a PIK Dividend or (iii) any combination of both. Commencing on July 1, 2022, each share of Series B Preferred Stock became convertible, at the option of the holder, into a number of shares of the Issuer's common stock equal to the then-applicable stated value divided by the then-applicable conversion price. The conversion price of the Series B Preferred Stock is initially $85.00 per share, subject to adjustments set forth in the Statement with Respect to Shares.

(3) In addition, at any time after the third anniversary of the applicable issuance date, if the closing sale price of the Issuer's common stock exceeds 150% of the then-applicable conversion price for 20 trading days in any 30 consecutive trading day period, the Issuer may elect to convert all of the shares of the applicable series of Series B Preferred Stock into a number of shares of the Issuer's common stock equal to the then-applicable stated value divided by the then-applicable conversion price in accordance with the Statement with Respect to Shares.

(4) Directly held by BCPE Watson (DE) BML, LP ("BML"). BCPE Watson (DE) BML GP, LLC ("BML GP") is the general partner of BML. As a result, BML GP may be deemed to share voting and dispositive power with respect to the securities held by BML. BML GP disclaims beneficial ownership of such securities, except to the extent of its pecuniary interest therein.

(5) Bain Capital Investors, LLC ("BCI") is the manager of Bain Capital Partners XII, LLC ("Partners XII"), which is the general partner of Bain Capital Fund XII, L.P. ("Fund XII"). Fund XII is the sole member of BCPE Watson (DE) Aggregator GP, LLC ("Aggregator GP"), which is the general partner of BCPE Watson (DE) Aggregator, LP ("Aggregator"). Aggregator is the sole member of BML GP. As a result, each of BCI, Partners XII, Fund XII, Aggregator GP and Aggregator may be deemed to share voting and dispositive power with respect to the securities held by  BML. Each of BCI, Partners XII, Fund XII, Aggregator GP and Aggregator disclaims beneficial ownership of such securities, except to the extent of its pecuniary interest therein.

(6) On November 10, 2025, BML, distributed 254,252 shares of Common Stock to one or more members or partners of BML in connection with certain charitable gifts to be made by such members or partners or their direct or indirect owners.

**Signature:** Bain Capital Investors, LLC, By: /s/ Joseph Robbins, Title: Authorized Signatory  
**Date:** 2025-11-12

**Signature:** Bain Capital Fund XII, L.P., By: Bain Capital Partners XII, LLC, its general partner, By: Bain Capital Investors, LLC, its manager, By: /s/ Joseph Robbins, Title: Authorized Signatory  
**Date:** 2025-11-12

**Signature:** Bain Capital Partners XII, LLC, By: Bain Capital Investors, LLC, its manager, By: /s/ Joseph Robbins, Title: Authorized Signatory  
**Date:** 2025-11-12

**Signature:** BCPE Watson (DE) Aggregator GP, LLC, By: /s/ Joseph Robbins, Title: Authorized Signatory  
**Date:** 2025-11-12

**Signature:** BCPE Watson (DE) Aggregator, LP, By: BCPE Watson (DE) Aggregator GP, LLC, its general partner, By: /s/ Joseph Robbins, Title: Authorized Signatory  
**Date:** 2025-11-12

**Signature:** BCPE Watson (DE) BML GP, LLC, By: /s/ Joseph Robbins, Title: Authorized Signatory  
**Date:** 2025-11-12

**Signature:** BCPE Watson (DE) BML, LP, By: BCPE Watson (DE) BML GP, LLC, its general partner, By: /s/ Joseph Robbins, Title: Authorized Signatory  
**Date:** 2025-11-12

### Remarks:

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.

**Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.**