# EDGAR Filing Document

**Accession Number:** 0001861795
**File Stem:** 0000899243-23-006421
**Filing Date:** 2023-2
**Character Count:** 19004
**Document Hash:** bdbde6b747edd1ed19f6bbaccb9ce1ed
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000899243-23-006421.hdr.sgml**: 20230228

**ACCESSION NUMBER**: 0000899243-23-006421

**CONFORMED SUBMISSION TYPE**: 4

**PUBLIC DOCUMENT COUNT**: 2

**CONFORMED PERIOD OF REPORT**: 20230227

**FILED AS OF DATE**: 20230228

**DATE AS OF CHANGE**: 20230228

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Spectrum VII Investment Managers' Fund, L.P.
- **CENTRAL INDEX KEY:** 0001626997
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-40815
- **FILM NUMBER:** 23686867

**BUSINESS ADDRESS:**
- **STREET 1:** ONE INTERNATIONAL PLACE
- **STREET 2:** 35TH FLOOR
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02110
- **BUSINESS PHONE:** 617-464-4600

**MAIL ADDRESS:**
- **STREET 1:** ONE INTERNATIONAL PLACE
- **STREET 2:** 35TH FLOOR
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02110
**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Spectrum VII Co-Investment Fund, L.P.
- **CENTRAL INDEX KEY:** 0001822087
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-40815
- **FILM NUMBER:** 23686866

**BUSINESS ADDRESS:**
- **STREET 1:** ONE INTERNATIONAL PLACE
- **STREET 2:** SUITE 3520
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02110
- **BUSINESS PHONE:** 617-464-4600

**MAIL ADDRESS:**
- **STREET 1:** ONE INTERNATIONAL PLACE
- **STREET 2:** SUITE 3520
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02110
**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Spectrum Equity Associates VII, L.P.
- **CENTRAL INDEX KEY:** 0001824228
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-40815
- **FILM NUMBER:** 23686865

**BUSINESS ADDRESS:**
- **STREET 1:** ONE INTERNATIONAL PLACE
- **STREET 2:** SUITE 3520
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02110
- **BUSINESS PHONE:** 617-464-4600

**MAIL ADDRESS:**
- **STREET 1:** ONE INTERNATIONAL PLACE
- **STREET 2:** SUITE 3520
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02110
**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** SE VII DHC AIV, L.P.
- **CENTRAL INDEX KEY:** 0001879386
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-40815
- **FILM NUMBER:** 23686869

**BUSINESS ADDRESS:**
- **STREET 1:** 140 NEW MONTGOMERY STREET, 20TH FLOOR
- **CITY:** SAN FRANCISCO
- **STATE:** CA
- **ZIP:** 94105
- **BUSINESS PHONE:** 415-464-4600

**MAIL ADDRESS:**
- **STREET 1:** 140 NEW MONTGOMERY STREET, 20TH FLOOR
- **CITY:** SAN FRANCISCO
- **STATE:** CA
- **ZIP:** 94105
**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** SEA VII Management, LLC
- **CENTRAL INDEX KEY:** 0001824265
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-40815
- **FILM NUMBER:** 23686870

**BUSINESS ADDRESS:**
- **STREET 1:** ONE INTERNATIONAL PLACE
- **STREET 2:** SUITE 3520
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02110
- **BUSINESS PHONE:** 617-464-4600

**MAIL ADDRESS:**
- **STREET 1:** ONE INTERNATIONAL PLACE
- **STREET 2:** SUITE 3520
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02110
**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** SE VII DHC AIV Feeder, L.P.
- **CENTRAL INDEX KEY:** 0001879377
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-40815
- **FILM NUMBER:** 23686868

**BUSINESS ADDRESS:**
- **STREET 1:** 140 NEW MONTGOMERY STREET, 20TH FLOOR
- **CITY:** SAN FRANCISCO
- **STATE:** CA
- **ZIP:** 94105
- **BUSINESS PHONE:** 415-464-4600

**MAIL ADDRESS:**
- **STREET 1:** 140 NEW MONTGOMERY STREET, 20TH FLOOR
- **CITY:** SAN FRANCISCO
- **STATE:** CA
- **ZIP:** 94105
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Definitive Healthcare Corp.
- **CENTRAL INDEX KEY:** 0001861795
- **STANDARD INDUSTRIAL CLASSIFICATION:** SERVICES-PREPACKAGED SOFTWARE [7372]
- **IRS NUMBER:** 000000000
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**BUSINESS ADDRESS:**
- **STREET 1:** 492 OLD CONNECTICUT PATH, SUITE 401
- **CITY:** FRAMINGHAM
- **STATE:** MA
- **ZIP:** 01701
- **BUSINESS PHONE:** 508-720-4224

**MAIL ADDRESS:**
- **STREET 1:** 492 OLD CONNECTICUT PATH, SUITE 401
- **CITY:** FRAMINGHAM
- **STATE:** MA
- **ZIP:** 01701

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** Definitive Healthcare
- **DATE OF NAME CHANGE:** 20210512

## Exhibit 99.1

```
<PRE>
                                                                    Exhibit 99.1

                                Explanatory Note

(1)      Represents the exchange of limited liability company units ("LLC
Units") of AIDH Topco, LLC ("Definitive OpCo"), a subsidiary of the Issuer,
together with the cancellation of an equal number of the Issuer's Class B Common
Stock for shares of the Issuer's Class A Common Stock on a one-for-one basis.
The LLC Units exchanged and an equal number of shares of Class B Common Stock
cancelled by each Spectrum Fund (as defined below) are as follows: (i) 2,511,224
by SE VII DHC AIV, L.P. ("SE VII DHC AIV"), (ii) 3,939 by Spectrum VII
Investment Managers' Fund, L.P. ("Spectrum VII Investment Managers' Fund") and
(iii) 2,301 by Spectrum VII Co-Investment Fund, L.P. ("Spectrum VII Co-
Investment Fund").

(2)      The Second Amended and Restated Limited Liability Company Agreement of
Definitive OpCo permits holders of LLC Units to exchange their LLC Units for
shares of Class A Common Stock on a one-for-one basis, subject to certain
exceptions, conditions and adjustments. At the time of any such exchange, an
equal number of shares of Class B Common Stock of the Issuer held by the
Reporting Persons, which have no economic value and entitle holders thereof to
one vote per share on all matters on which stockholders of the Issuer are
entitled to vote generally, are cancelled. The LLC Units have no expiration
date.

(3)      SEA VII Management, LLC ("Spectrum") manages the Spectrum Funds (as
defined below) that collectively own, following the reported transactions,
2,026,435 shares of Class A Common Stock of the Issuer and 19,458,380 shares of
Class B common stock of the Issuer, which are represented as follows: (i)
2,026,435 shares of Class A Common Stock held directly by SE VII DHC AIV Feeder,
L.P. ("Spectrum Feeder" and together with SE VII DHC AIV, Spectrum VII
Investment Managers' Fund and Spectrum VII Co-Investment Fund, the "Spectrum
Funds"), (ii) 19,413,693 shares of Class B Common Stock held directly by SE VII
DHC AIV; (iii) 28,209 shares of Class B Common Stock held directly by Spectrum
VII Investment Managers' Fund; and (iv) 16,478 shares of Class B Common Stock
held directly by Spectrum VII Co-Investment Fund. Spectrum is the general
partner of Spectrum Equity Associates VII, L.P., which in turn is the general
partner of each of the Spectrum Funds. Each Reporting Person disclaims Section
16 beneficial ownership of the shares reported herein except to the extent of
its pecuniary interest therein, if any, and the inclusion of these shares in
this report shall not be deemed an admission of beneficial ownership of any of
the reported shares for purposes of Section 16 or any other purpose.

(4)      Represents the sale of 2,710,803 shares of Class A Common Stock by SE
VII DHC AIV, 282,957 shares by Spectrum Feeder, 3,939 shares by Spectrum VII
Investment Managers' Fund, and 2,301 shares by Spectrum VII Co-Investment Fund.

</PRE>
```

### 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>SEA VII Management, LLC<br><sub>(Last) (First) (Middle)</sub><br>140 NEW MONTGOMERY STREET, 20TH FLOOR<br><sub>(Street)</sub><br>SAN FRANCISCO, CA 94105<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2023-02-27 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[X] Director [X] 10% Owner<br>[ ] Officer (give title below) [ ] Other (specify below)<br>_ _ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>Definitive Healthcare Corp. [ DH ] | **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>SE VII DHC AIV, L.P.<br><sub>(Last) (First) (Middle)</sub><br>140 NEW MONTGOMERY STREET,<br>20TH FLOOR<br><sub>(Street)</sub><br>SAN FRANCISCO, CA 94105<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2023-02-27 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[X] Director [X] 10% Owner<br>[ ] Officer (give title below) [ ] Other (specify below)<br>_ _ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>Definitive Healthcare Corp. [ DH ] | **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>SE VII DHC AIV Feeder, L.P.<br><sub>(Last) (First) (Middle)</sub><br>140 NEW MONTGOMERY STREET,<br>20TH FLOOR<br><sub>(Street)</sub><br>SAN FRANCISCO, CA 94105<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2023-02-27 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[X] Director [X] 10% Owner<br>[ ] Officer (give title below) [ ] Other (specify below)<br>_ _ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>Definitive Healthcare Corp. [ DH ] | **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>Spectrum VII Investment Managers' Fund, L.P.<br><sub>(Last) (First) (Middle)</sub><br>140 NEW MONTGOMERY STREET,<br>20TH FLOOR<br><sub>(Street)</sub><br>SAN FRANCISCO, CA 94105<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2023-02-27 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[X] Director [X] 10% Owner<br>[ ] Officer (give title below) [ ] Other (specify below)<br>_ _ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>Definitive Healthcare Corp. [ DH ] | **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>Spectrum VII Co-Investment Fund, L.P.<br><sub>(Last) (First) (Middle)</sub><br>140 NEW MONTGOMERY STREET,<br>20TH FLOOR<br><sub>(Street)</sub><br>SAN FRANCISCO, CA 94105<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2023-02-27 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[X] Director [X] 10% Owner<br>[ ] Officer (give title below) [ ] Other (specify below)<br>_ _ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>Definitive Healthcare Corp. [ DH ] | **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>Spectrum Equity Associates VII, L.P.<br><sub>(Last) (First) (Middle)</sub><br>140 NEW MONTGOMERY STREET,<br>20TH FLOOR<br><sub>(Street)</sub><br>SAN FRANCISCO, CA 94105<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2023-02-27 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[X] Director [X] 10% Owner<br>[ ] Officer (give title below) [ ] Other (specify below)<br>_ _ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>Definitive Healthcare Corp. [ DH ] | **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 |
| Class B Common Stock | 2023-02-27 |  | J<sup>(1)(2)</sup> |  | 2517464 | D | <sup>(1)(2)</sup> | 19458380 | I | See note<sup>(3)</sup> |
| Class A Common Stock | 2023-02-27 |  | C<sup>(1)(2)</sup> |  | 2517464 | A | <sup>(1)(2)</sup> | 5026435 | I | See note<sup>(3)</sup> |
| Class A Common Stock | 2023-02-27 |  | S |  | 3000000<sup>(4)</sup> | D | $11.12 | 2026435 | I | See note<sup>(3)</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 |
| LLC Units of AIDH Topco, LLC | <sup>(2)</sup> | 2023-02-27 |  | C<sup>(1)(2)</sup> |  |  | 2517464 | <sup>(2)</sup> | <sup>(2)</sup> | Class A Common Stock | 2517464<sup>(2)</sup> | <sup>(1)(2)</sup> | 19458380 | I | See note<sup>(3)</sup> |

---

### Footnotes:

(1) See Exhibit 99.1 for the text of footnote (1).

(2) See Exhibit 99.1 for the text of footnote (2).

(3) See Exhibit 99.1 for the text of footnote (3).

(4) See Exhibit 99.1 for the text of footnote (4).

**Remarks:**
Christopher T. Mitchell, a Managing Director of Spectrum and Jeffrey C. Haywood, a Managing Director of Spectrum (together, the "Spectrum Directors"), each serve on the board of directors of the Issuer, and have been deputized to represent the Reporting Persons on the board of directors. By virtue of the Spectrum Directors' representation, for purposes of Section 16 of the Securities Exchange Act of 1934, each of the Reporting Persons may be deemed directors by deputization of the Issuer. The Spectrum Directors have filed separate Section 16 reports disclosing securities of the Issuer that they may be deemed to beneficially own for Section 16 purposes.

**Signature:** SEA VII MANAGEMENT, LLC, By: /s/ Carolina A. Picazo, Chief Administrative Officer & Chief Compliance Officer  
**Date:** 2023-02-28

**Signature:** SE VII DHC AIV, L.P., By: Spectrum Equity Associates VII, L.P., its general partner, By: SEA VII Management, LLC, its general partner, By: /s/Carolina A. Picazo, its Chief Administrative Officer & Chief Compliance Officer  
**Date:** 2023-02-28

**Signature:** SE VII DHC AIV FEEDER, L.P., By: Spectrum Equity Associates VII, L.P., its general partner, By: SEA Management, LLC, its general partner, By: /s/ Carolina A. Picazo, Chief Administrative Officer & Chief Compliance Officer  
**Date:** 2023-02-28

**Signature:** SPECTRUM VII INVESTMENT MANAGERS' FUND, L.P., By: SEA Management, LLC, its general partner, By: /s/ Carolina A. Picazo, Chief Administrative Officer & Chief Compliance Officer  
**Date:** 2023-02-28

**Signature:** SPECTRUM VII CO-INVESTMENT FUND, L.P., By: /s/ Carolina A. Picazo, Chief Administrative Officer & Chief Compliance Officer  
**Date:** 2023-02-28

**Signature:** SPECTRUM EQUITY ASSOCIATES VII, L.P., By: SEA Management, LLC, its general partner, By: /s/ Carolina A. Picazo, Chief Administrative Officer & Chief Compliance Officer  
**Date:** 2023-02-28

### 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.**