# EDGAR Filing Document

**Accession Number:** 0002055322
**File Stem:** 0000947871-25-001089
**Filing Date:** 2025-12
**Character Count:** 19856
**Document Hash:** 3c5fcc8a7c94be88a0cf7998200fbcf4
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000947871-25-001089.hdr.sgml**: 20251222

**ACCESSION NUMBER**: 0000947871-25-001089

**CONFORMED SUBMISSION TYPE**: SCHEDULE 13D/A

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20251222

**DATE AS OF CHANGE**: 20251222

**SUBJECT COMPANY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** QUANTUM CORP /DE/
- **CENTRAL INDEX KEY:** 0000709283
- **STANDARD INDUSTRIAL CLASSIFICATION:** COMPUTER STORAGE DEVICES [3572]
- **ORGANIZATION NAME:** 06 Technology
- **EIN:** 942665054
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 0331

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D/A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 005-35818
- **FILM NUMBER:** 251594430

**BUSINESS ADDRESS:**
- **STREET 1:** 224 AIRPORT PARKWAY
- **STREET 2:** SUITE 550
- **CITY:** SAN JOSE
- **STATE:** CA
- **ZIP:** 95110
- **BUSINESS PHONE:** 408 944 4000

**MAIL ADDRESS:**
- **STREET 1:** 224 AIRPORT PARKWAY
- **STREET 2:** SUITE 550
- **CITY:** SAN JOSE
- **STATE:** CA
- **ZIP:** 95110
**FILED BY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Dialectic Technology SPV LLC
- **CENTRAL INDEX KEY:** 0002055322

**ORGANIZATION NAME:**
- **EIN:** 332254869
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D/A

**BUSINESS ADDRESS:**
- **STREET 1:** 119 ROWAYTON AVENUE, 2ND FLOOR
- **CITY:** NORWALK
- **STATE:** CT
- **ZIP:** 06853
- **BUSINESS PHONE:** 212-230-3220

**MAIL ADDRESS:**
- **STREET 1:** 119 ROWAYTON AVENUE, 2ND FLOOR
- **CITY:** NORWALK
- **STATE:** CT
- **ZIP:** 06853

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

## SCHEDULE 13D

### Under the Securities Exchange Act of 1934

**(Amendment No. 1)**

**QUANTUM CORP /DE/**

*(Name of Issuer)*

**Common Stock**

*(Title of Class of Securities)*

**747906600**

*(CUSIP Number)*

**Dialectic Technology SPV LLC**<br>John Fichthorn<br>119 Rowayton Avenue<br>Rowayton CT 06853<br>212-230-3220

*(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)*

**12/18/2025**

*(Date of Event Which Requires Filing of this Statement)*

| **CUSIP No.** | **747906600** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Dialectic Technology SPV LLC** | Name of reporting person<br>**Dialectic Technology SPV LLC** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**OO** | Source of funds (See Instructions)<br>**OO** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**DELAWARE** | Citizenship or place of organization<br>**DELAWARE** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**8125119.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**8125119.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**8125119.00** | Aggregate amount beneficially owned by each reporting person<br>**8125119.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**37.2%** | Percent of class represented by amount in Row (11)<br>**37.2%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**IV** | Type of Reporting Person (See Instructions)<br>**IV** | |

---

**Comment for Reporting Person:** The amount listed in Rows 8, 10 and 11 consists of 2,653,308 shares of Common Stock of the Issuer, par value $0.01 per share ("Common Stock"), issuable on the exercise of the Forbearance Warrant (as defined herein) ("Warrant Shares") and 5,471,811 shares of Common Stock issuable on the conversion of the Convertible Notes (as defined herein) ("Convert Shares"). The Reporting Persons will not have the power to vote or dispose of (i) the Warrant Shares unless, and to the extent, Dialectic Technology SPV LLC ("Dialectic") exercises its right to acquire Warrant Shares in accordance with the terms of the Forbearance Warrant or (ii) the Convert Shares unless, and to the extent, the Convertible Notes are converted into Convert Shares in accordance with the terms of the Convertible Notes.

The percentage calculated in Row 13 is based on a total of 13,721,291 shares of Common Stock issued and outstanding as of November 11, 2025.

| **CUSIP No.** | **747906600** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Dialectic Technology Manager LLC** | Name of reporting person<br>**Dialectic Technology Manager LLC** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**OO** | Source of funds (See Instructions)<br>**OO** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**DELAWARE** | Citizenship or place of organization<br>**DELAWARE** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**8125119.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**8125119.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**8125119.00** | Aggregate amount beneficially owned by each reporting person<br>**8125119.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**37.2%** | Percent of class represented by amount in Row (11)<br>**37.2%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**IV** | Type of Reporting Person (See Instructions)<br>**IV** | |

---

**Comment for Reporting Person:** The amount listed in Rows 8, 10 and 11 consists of 2,653,308 Warrant Shares and 5,471,811 Convert Shares. The Reporting Persons will not have the power to vote or dispose of (i) the Warrant Shares unless, and to the extent, Dialectic exercises its right to acquire Warrant Shares in accordance with the terms of the Forbearance Warrant and (ii) the Convert Shares unless, and to the extent, the Convertible Notes are converted into Convert Shares in accordance with the terms of the Convertible Notes.

The percentage calculated in Row 13 is based on a total of 13,721,291 shares of Common Stock issued and outstanding as of November 11, 2025.

| **CUSIP No.** | **747906600** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**JOHN FICHTHORN** | Name of reporting person<br>**JOHN FICHTHORN** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**OO** | Source of funds (See Instructions)<br>**OO** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**X1** | Citizenship or place of organization<br>**X1** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**15271.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**8125119.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**15271.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**8125119.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**8140390.00** | Aggregate amount beneficially owned by each reporting person<br>**8140390.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**37.3%** | Percent of class represented by amount in Row (11)<br>**37.3%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**IN** | Type of Reporting Person (See Instructions)<br>**IN** | |

---

**Comment for Reporting Person:** The amount listed in Rows 8 and 10 consists of 2,653,308 Warrant Shares and 5,471,811 Convert Shares. The Reporting Persons will not have the power to vote or dispose of (i) the Warrant Shares unless, and to the extent, Dialectic exercises its right to acquire Warrant Shares in accordance with the terms of the Forbearance Warrant and (ii) the Convert Shares unless, and to the extent, the Convertible Notes are converted into Convert Shares in accordance with the terms of the Convertible Notes.

The amount listed in Rows 7 and 9 consists of 10,866 shares of Common Stock directly held by Mr. Fichthorn; and 4,405 restricted stock units ("RSUs") issued to Mr. Fichthorn on May 1, 2025 in his capacity as a director of the Issuer.

The percentage calculated in Row 13 is based on a total of 13,721,291 shares of Common Stock issued and outstanding as of November 11, 2025.

**Item 1. Security and Issuer**

**(a) Title of Class of Securities:**
Common Stock

**(b) Name of Issuer:**
QUANTUM CORP /DE/

**(c) Address of Issuer's Principal Executive Offices:**
10770 E. Briarwood Avenue, Centennial, CO, 80112

This Amendment No. 1 (this "Amendment" or "Amendment No. 1") amends and supplements the Statement on Schedule 13D originally filed by the Reporting Persons with the Securities and Exchange Commission (the "SEC") on October 10, 2025 (the "Original Statement"), which relates to the Common Stock of Quantum Corporation (the "Issuer"). Except as otherwise described herein, the information contained in the Original Statement remains in effect. Capitalized terms used but not defined in this Amendment shall have the respective meanings set forth with respect thereto in the Original Statement.

**Item 4. Purpose of Transaction**

Item 4 of the Original Statement is hereby amended by deleting the heading "Convertible Notes" and the two paragraphs thereunder and replacing them with the following:

Consummation of Debt Exchange, Convertible Notes, Indenture and Note Registration Rights Agreement

On December 16, 2025, the Issuer's stockholders approved the Debt Exchange, the Forbearance Warrant Excess Shares Issuance and the Additional Notes Issuance.

On December 18, 2025, the Issuer and Dialectic consummated the transactions contemplated by the Transaction Agreement, including the Debt Exchange.  Upon the Closing, (a) the Issuer issued to Dialectic, on a dollar-for-dollar basis, Convertible Notes in an aggregate principal amount of $54,718,114 for the amounts then outstanding and owing by the Issuer to Dialectic under the Term Loans (including principal, any prepayment penalties and exit fees, but excluding any accrued and unpaid interest thereon) and (b) entered into the Indenture governing the Convertible Notes with U.S. Bank Trust Company, National Association, as trustee and collateral agent.

The Convertible Notes mature December 18, 2028 (the "Maturity Date") and have an interest rate of 10.00% per annum, payable in kind, compounded annually, and are secured by all of the assets of the Issuer currently securing the Term Loans. The initial conversion price of the Convertible Notes equals $10.00 per share (the "Conversion Price") of Common Stock, subject to adjustment for stock splits and similar events, and includes antidilution protections in favor of Dialectic as described in the Indenture. The Conversion Price is subject to adjustment on the last day of the three calendar quarters immediately following the Closing (each, a "Reset Price Date") to the greater of (a) $4.00 per share and (b) the lesser of (i) the then Conversion Price and (ii) the 30-day Daily VWAP (as defined in the Indenture) of the Common Stock immediately preceding the Reset Price Date.  Based on the Conversion Price as of the Closing Date, the Convertible Notes were convertible into 5,471,811 shares of Common Stock.

At the Issuer's option, all outstanding principal amount, accrued and unpaid interest and premium, if any, of any Convertible Notes outstanding on the Maturity Date shall be exchanged into shares of Common Stock at an exchange price equal to 80% of the Market Price, defined as the average of the Daily VWAP for each of the five lowest consecutive trading days during the 20 consecutive trading days ending on (and including) the trading day immediately prior to the Maturity Date. Following the six-month anniversary of Closing, if certain conditions are met, the Issuer may elect to require the exchange of a portion of the total outstanding amount of any Convertible Notes into shares of Common Stock at the then outstanding Conversion Price.

The Indenture contains certain affirmative and negative covenants substantially consistent with the Fifteenth Term Loan Amendment, as well as a covenant requiring the Issuer to maintain minimum liquidity of $3.75 million as of the last day of the first quarter of 2026, $5.0 million as of the last day of the second quarter of 2026, $6.25 million as of the last day of the third quarter of 2026 and $7.5 million as of the last day of the fourth quarter of 2026 and each quarter thereafter.

In addition, at the Closing, the Issuer and Dialectic entered into a registration rights agreement (the "Note Registration Rights Agreement") pursuant to which, among other things, the Issuer will provide Dialectic (or any assignee of the Convertible Notes) with certain demand and piggyback registration rights with respect to the shares of Common Stock issuable upon any conversion of the Convertible Notes.

In connection with the issuance of the Convertible Notes, on December 22, 2025, Dialectic delivered to the Issuer a waiver of the limitation on exercise of the Forbearance Warrant that would prevent exercise of the Forbearance Warrant to the extent that Dialectic, its affiliates and any other persons whose beneficial ownership of Common Stock would be aggregated with Dialectic's for purposes of Section 13(d) of the Securities Exchange Act of 1934 would beneficially own in excess of 4.99% or, under certain circumstances, 19.99% of the total number of issued and outstanding shares of Common Stock.  Such waiver will be effective on February 21, 2026, from and after which date the Forbearance Warrant will be exercisable in full without regard to such limitation.

**Item 5. Interest in Securities of the Issuer**

**(a)**
See rows (11) and (13) of the cover page to this Schedule 13D for the aggregate number of shares of Common Stock and percentage of Common Stock that would be beneficially owned by each Reporting Person upon (i) the exercise in full (and for cash, not on a net-exercise basis) of the Forbearance Warrant and (ii) the conversion of the Convertible Notes. The aggregate percentage of Common Stock reported beneficially owned by each Reporting Person upon exercise of the Forbearance Warrant and full conversion of the Convertible Notes is based upon 13,721,291 shares of Common Stock outstanding as of November 11, 2025, as reported in the Issuer's Quarterly Report on Form 10-Q filed with the SEC on November 13, 2025.

**(b)**
See rows (7) through (10) of the cover page to this Schedule 13D for the shares of Common Stock as to which each Reporting Person would have the sole or shared power to vote or direct the vote and sole or shared power to dispose or to direct the disposition upon (i) the exercise in full (and for cash, not on a net-exercise basis) of the Forbearance Warrant and (ii) the conversion of the Convertible Notes.

Dialectic would directly hold any Common Stock beneficially owned by it upon any exercise of the Forbearance Warrant and the conversion of the Convertible Notes. Dialectic Manager, as the manager of Dialectic, and Mr. Fichthorn, as the Manager of Dialectic Manager, may each be deemed to have the shared power to direct the voting and disposition of shares of Common Stock owned by Dialectic and, consequently, Mr. Fichthorn and Dialectic Manager may each be deemed to possess indirect beneficial ownership of such shares upon (i) any exercise by Dialectic of the Forbearance Warrant and (ii) the conversion of the Convertible Notes. Mr. Fichthorn and Dialectic Manager disclaim beneficial ownership of such shares for all other purposes.

Without giving effect to any exercise of the Forbearance Warrant or conversion of the Convertible Notes, Mr. Fichthorn directly holds and has the sole power to vote and dispose of 10,866 shares of Common Stock and 4,405 RSUs.

**(c)**
Except as described in Item 4 of this Amendment, no transactions in shares of Common Stock have been effected by the Reporting Persons during the past sixty (60) days.

**Item 6. Contracts, Arrangements, Understandings or Relationships With Respect to Securities of the Issuer.**

Item 6 of the Original Statement is hereby amended by adding the following to the end thereof:

The information set forth in Item 4 of Amendment No. 1 is incorporated herein by reference.

The foregoing descriptions are qualified in their entirety by reference to the full text of the Indenture and the Note Registration Rights Agreement, copies of which are filed as Exhibits 99.5 and 99.6, respectively, and are incorporated by reference in this Item 6.

### SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** Dialectic Technology SPV LLC

**Signature:** /s/ John Fichthorn

**Name/Title:** John Fichthorn / Authorized Signatory

**Date:** 12/22/2025

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** Dialectic Technology Manager LLC

**Signature:** /s/ John Fichthorn

**Name/Title:** John Fichthorn / Manager

**Date:** 12/22/2025

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** JOHN FICHTHORN

**Signature:** /s/ John Fichthorn

**Name/Title:** John Fichthorn

**Date:** 12/22/2025