Submarine Buyer LLC - 24 Aug 2026 Form 4 Insider Report for Jersey Mike's Subs Inc. (JMKE)

Reporting relationship
10%+ Owner
Issuer ticker
JMKE
Reported as of
24 Aug 2026
Net transaction value
-$56,210,436
Source evidence Original filing metadata and source links for verification. 4 source fields
SEC form
4
Accepted by SEC
26 Aug 2026, 16:30:16 UTC
Prior SEC filing
04 Aug 2026
Source filing
View source filing
Reporting owner 1 detail
Reporting owner signature
/s/ See Exhibit 99.1

Key filing fact

Submarine Buyer LLC filed Form 4 for Jersey Mike's Subs Inc. (JMKE) on 26 Aug 2026.

Key facts

  • This page summarizes Submarine Buyer LLC's Form 4 filing for Jersey Mike's Subs Inc. (JMKE).
  • 5 reported transactions and 7 derivative rows are listed below.
  • Accepted by SEC: 26 Aug 2026, 16:30.

Change

  • Previous filing in this sequence was filed on 04 Aug 2026.
  • Current net transaction value: -$56,210,436.

Research use

  • This tells you what this filing adds before you inspect full transaction and derivative tables.
  • You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (7)

CIK 0002146176 Primary reporting owner

Submarine Buyer LLC

Relationship
10%+ Owner
Address
C/O BLACKSTONE INC., 345 PARK AVENUE, NEW YORK
Signature
/s/ See Exhibit 99.1
Signature date
26 Aug 2026
CIK 0002145545

Boardwalk II Aggregator L.P.

Relationship
10%+ Owner
Address
C/O BLACKSTONE INC., 345 PARK AVENUE, NEW YORK
Signature
/s/ See Exhibit 99.1
Signature date
26 Aug 2026
CIK 0002146115

Submarine Buyer Holdco LLC

Relationship
10%+ Owner
Address
C/O BLACKSTONE INC., 345 PARK AVENUE, NEW YORK
Signature
/s/ See Exhibit 99.1
Signature date
26 Aug 2026
CIK 0002138039

Boardwalk I Aggregator L.P.

Relationship
10%+ Owner
Address
C/O BLACKSTONE INC., 345 PARK AVENUE, NEW YORK
Signature
/s/ See Exhibit 99.1
Signature date
26 Aug 2026
CIK 0002138037

BCP 9 Holdings Manager L.L.C.

Relationship
10%+ Owner
Address
C/O BLACKSTONE INC., 345 PARK AVENUE, NEW YORK
Signature
/s/ See Exhibit 99.1
Signature date
26 Aug 2026
CIK 0002138051

Blackstone Management Associates IX L.P.

Relationship
10%+ Owner
Address
C/O BLACKSTONE INC., 345 PARK AVENUE, NEW YORK
Signature
/s/ See Exhibit 99.1
Signature date
26 Aug 2026
CIK 0002138050

BMA IX L.L.C.

Relationship
10%+ Owner
Address
C/O BLACKSTONE INC., 345 PARK AVENUE, NEW YORK
Signature
/s/ See Exhibit 99.1
Signature date
26 Aug 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

JMKE transaction

Class A Common Stock

Conversion of derivative security

Transaction value
Shares
+571,237
Change %
+398%
Price
Shares after
714,936
Date
24 Aug 2026
Ownership
See Footnotes
Footnotes
F1, F3, F5, F6, F7
JMKE transaction

Class A Common Stock

Conversion of derivative security

Transaction value
Shares
+571,237
Change %
+398%
Price
Shares after
714,936
Date
24 Aug 2026
Ownership
See Footnotes
Footnotes
F1, F3, F5, F6, F7
JMKE transaction

Class A Common Stock

Conversion of derivative security

Transaction value
Shares
+571,237
Change %
+398%
Price
Shares after
714,936
Date
24 Aug 2026
Ownership
See Footnotes
Footnotes
F1, F3, F5, F6, F7
JMKE transaction

Class A Common Stock

Conversion of derivative security

Transaction value
Shares
+571,237
Change %
+398%
Price
Shares after
714,936
Date
24 Aug 2026
Ownership
See Footnotes
Footnotes
F1, F3, F5, F6, F7
JMKE transaction

Class A Common Stock

Conversion of derivative security

Transaction value
Shares
+571,237
Change %
+398%
Price
Shares after
714,936
Date
24 Aug 2026
Ownership
See Footnotes
Footnotes
F1, F3, F5, F6, F7
JMKE transaction

Class A Common Stock

Conversion of derivative security

Transaction value
Shares
+571,237
Change %
+398%
Price
Shares after
714,936
Date
24 Aug 2026
Ownership
See Footnotes
Footnotes
F1, F3, F5, F6, F7
JMKE transaction

Class A Common Stock

Conversion of derivative security

Transaction value
Shares
+571,237
Change %
+398%
Price
Shares after
714,936
Date
24 Aug 2026
Ownership
See Footnotes
Footnotes
F1, F3, F5, F6, F7
JMKE transaction

Class A Common Stock

Sale

Transaction value
$12,481,528
Shares
-571,237
Change %
-80%
Price
$21.85
Shares after
143,699
Date
25 Aug 2026
Ownership
See Footnotes
Footnotes
F2, F3, F5, F6, F7
JMKE transaction

Class A Common Stock

Sale

Transaction value
$12,481,528
Shares
-571,237
Change %
-80%
Price
$21.85
Shares after
143,699
Date
25 Aug 2026
Ownership
See Footnotes
Footnotes
F2, F3, F5, F6, F7
JMKE transaction

Class A Common Stock

Sale

Transaction value
$12,481,528
Shares
-571,237
Change %
-80%
Price
$21.85
Shares after
143,699
Date
25 Aug 2026
Ownership
See Footnotes
Footnotes
F2, F3, F5, F6, F7
JMKE transaction

Class A Common Stock

Sale

Transaction value
$12,481,528
Shares
-571,237
Change %
-80%
Price
$21.85
Shares after
143,699
Date
25 Aug 2026
Ownership
See Footnotes
Footnotes
F2, F3, F5, F6, F7
JMKE transaction

Class A Common Stock

Sale

Transaction value
$12,481,528
Shares
-571,237
Change %
-80%
Price
$21.85
Shares after
143,699
Date
25 Aug 2026
Ownership
See Footnotes
Footnotes
F2, F3, F5, F6, F7
JMKE transaction

Class A Common Stock

Sale

Transaction value
$12,481,528
Shares
-571,237
Change %
-80%
Price
$21.85
Shares after
143,699
Date
25 Aug 2026
Ownership
See Footnotes
Footnotes
F2, F3, F5, F6, F7
JMKE transaction

Class A Common Stock

Sale

Transaction value
$12,481,528
Shares
-571,237
Change %
-80%
Price
$21.85
Shares after
143,699
Date
25 Aug 2026
Ownership
See Footnotes
Footnotes
F2, F3, F5, F6, F7
JMKE transaction

Class A Common Stock

Sale

Transaction value
$43,728,908
Shares
-2,001,323
Change %
-1.1%
Price
$21.85
Shares after
187,137,212
Date
25 Aug 2026
Ownership
See Footnotes
Footnotes
F2, F4, F5, F6, F7
JMKE transaction

Class A Common Stock

Sale

Transaction value
$43,728,908
Shares
-2,001,323
Change %
-1.1%
Price
$21.85
Shares after
187,137,212
Date
25 Aug 2026
Ownership
See Footnotes
Footnotes
F2, F4, F5, F6, F7
JMKE transaction

Class A Common Stock

Sale

Transaction value
$43,728,908
Shares
-2,001,323
Change %
-1.1%
Price
$21.85
Shares after
187,137,212
Date
25 Aug 2026
Ownership
See Footnotes
Footnotes
F2, F4, F5, F6, F7
JMKE transaction

Class A Common Stock

Sale

Transaction value
$43,728,908
Shares
-2,001,323
Change %
-1.1%
Price
$21.85
Shares after
187,137,212
Date
25 Aug 2026
Ownership
See Footnotes
Footnotes
F2, F4, F5, F6, F7
JMKE transaction

Class A Common Stock

Sale

Transaction value
$43,728,908
Shares
-2,001,323
Change %
-1.1%
Price
$21.85
Shares after
187,137,212
Date
25 Aug 2026
Ownership
See Footnotes
Footnotes
F2, F4, F5, F6, F7
JMKE transaction

Class A Common Stock

Sale

Transaction value
$43,728,908
Shares
-2,001,323
Change %
-1.1%
Price
$21.85
Shares after
187,137,212
Date
25 Aug 2026
Ownership
See Footnotes
Footnotes
F2, F4, F5, F6, F7
JMKE transaction

Class A Common Stock

Sale

Transaction value
$43,728,908
Shares
-2,001,323
Change %
-1.1%
Price
$21.85
Shares after
187,137,212
Date
25 Aug 2026
Ownership
See Footnotes
Footnotes
F2, F4, F5, F6, F7
JMKE transaction

Class B Common Stock

Other

Transaction value
Shares
-571,237
Change %
-1.1%
Price
Shares after
53,270,810
Date
25 Aug 2026
Ownership
See Footnotes
Footnotes
F3, F5, F6, F7, F8
JMKE transaction

Class B Common Stock

Other

Transaction value
Shares
-571,237
Change %
-1.1%
Price
Shares after
53,270,810
Date
25 Aug 2026
Ownership
See Footnotes
Footnotes
F3, F5, F6, F7, F8
JMKE transaction

Class B Common Stock

Other

Transaction value
Shares
-571,237
Change %
-1.1%
Price
Shares after
53,270,810
Date
25 Aug 2026
Ownership
See Footnotes
Footnotes
F3, F5, F6, F7, F8
JMKE transaction

Class B Common Stock

Other

Transaction value
Shares
-571,237
Change %
-1.1%
Price
Shares after
53,270,810
Date
25 Aug 2026
Ownership
See Footnotes
Footnotes
F3, F5, F6, F7, F8
JMKE transaction

Class B Common Stock

Other

Transaction value
Shares
-571,237
Change %
-1.1%
Price
Shares after
53,270,810
Date
25 Aug 2026
Ownership
See Footnotes
Footnotes
F3, F5, F6, F7, F8
JMKE transaction

Class B Common Stock

Other

Transaction value
Shares
-571,237
Change %
-1.1%
Price
Shares after
53,270,810
Date
25 Aug 2026
Ownership
See Footnotes
Footnotes
F3, F5, F6, F7, F8
JMKE transaction

Class B Common Stock

Other

Transaction value
Shares
-571,237
Change %
-1.1%
Price
Shares after
53,270,810
Date
25 Aug 2026
Ownership
See Footnotes
Footnotes
F3, F5, F6, F7, F8

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

JMKE transaction Derivative

Common Units of Jersey Mike's HoldCo, LLC

Conversion of derivative security

Transaction value
Shares
-571,237
Change %
-1.1%
Price
$0.000000*
Shares after
53,270,810
Date
24 Aug 2026
Ownership
See Footnotes
Underlying class
Class A Common Stock
Underlying amount
571,237
Exercise price
Footnotes
F1, F3, F5, F6, F7
JMKE transaction Derivative

Common Units of Jersey Mike's HoldCo, LLC

Conversion of derivative security

Transaction value
Shares
-571,237
Change %
-1.1%
Price
$0.000000*
Shares after
53,270,810
Date
24 Aug 2026
Ownership
See Footnotes
Underlying class
Class A Common Stock
Underlying amount
571,237
Exercise price
Footnotes
F1, F3, F5, F6, F7
JMKE transaction Derivative

Common Units of Jersey Mike's HoldCo, LLC

Conversion of derivative security

Transaction value
Shares
-571,237
Change %
-1.1%
Price
$0.000000*
Shares after
53,270,810
Date
24 Aug 2026
Ownership
See Footnotes
Underlying class
Class A Common Stock
Underlying amount
571,237
Exercise price
Footnotes
F1, F3, F5, F6, F7
JMKE transaction Derivative

Common Units of Jersey Mike's HoldCo, LLC

Conversion of derivative security

Transaction value
Shares
-571,237
Change %
-1.1%
Price
$0.000000*
Shares after
53,270,810
Date
24 Aug 2026
Ownership
See Footnotes
Underlying class
Class A Common Stock
Underlying amount
571,237
Exercise price
Footnotes
F1, F3, F5, F6, F7
JMKE transaction Derivative

Common Units of Jersey Mike's HoldCo, LLC

Conversion of derivative security

Transaction value
Shares
-571,237
Change %
-1.1%
Price
$0.000000*
Shares after
53,270,810
Date
24 Aug 2026
Ownership
See Footnotes
Underlying class
Class A Common Stock
Underlying amount
571,237
Exercise price
Footnotes
F1, F3, F5, F6, F7
JMKE transaction Derivative

Common Units of Jersey Mike's HoldCo, LLC

Conversion of derivative security

Transaction value
Shares
-571,237
Change %
-1.1%
Price
$0.000000*
Shares after
53,270,810
Date
24 Aug 2026
Ownership
See Footnotes
Underlying class
Class A Common Stock
Underlying amount
571,237
Exercise price
Footnotes
F1, F3, F5, F6, F7
JMKE transaction Derivative

Common Units of Jersey Mike's HoldCo, LLC

Conversion of derivative security

Transaction value
Shares
-571,237
Change %
-1.1%
Price
$0.000000*
Shares after
53,270,810
Date
24 Aug 2026
Ownership
See Footnotes
Underlying class
Class A Common Stock
Underlying amount
571,237
Exercise price
Footnotes
F1, F3, F5, F6, F7
* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 8 footnotes

Footnote F1

Pursuant to the terms of an exchange agreement, dated as of July 29, 2026, holders have the right to exchange their common units of Jersey Mike's HoldCo, LLC ("Common Units") for shares of Class A common stock ("Class A Common Stock") of Jersey Mike's Subs Inc. (the "Issuer") on a one-for-one basis, subject to customary conversion rate adjustments for stock splits, stock dividends and reclassifications. These exchange rights do not expire.

Footnote F2

This amount represents the $23.00 secondary public offering price per share of Class A Common Stock of the Issuer, less the underwriting discount of $1.15 per share sold by the Reporting Persons in connection with the underwriters' exercise of their over-allotment option relating to the Issuer's initial public offering.

Footnote F3

Reflects securities of the Issuer held directly by Submarine Buyer LLC. Submarine Buyer Holdco LLC is the sole member of Submarine Buyer LLC. Boardwalk I Aggregator L.P. is the managing member of Submarine Buyer Holdco LLC.

Footnote F4

Reflects securities of the Issuer held directly by Boardwalk II Aggregator L.P.

Footnote F5

BCP 9 Holdings Manager L.L.C. is the general partner of Boardwalk I Aggregator L.P. and Boardwalk II Aggregator L.P. Blackstone Management Associates IX L.P. is the managing member of BCP 9 Holdings Manager L.L.C. BMA IX L.L.C. is the general partner of Blackstone Management Associates IX L.P. Blackstone Holdings II L.P. is the managing member of BMA IX L.L.C. Blackstone Holdings I/II GP L.L.C. is the general partner of Blackstone Holdings II L.P. Blackstone Inc. is the sole member of Blackstone Holdings I/II GP L.L.C. The sole holder of the Series II preferred stock of Blackstone Inc. is Blackstone Group Management L.L.C. Blackstone Group Management L.L.C. is wholly-owned by Blackstone's senior managing directors and controlled by its founder, Stephen A. Schwarzman.

Footnote F6

Each of the Reporting Persons (other than to the extent it directly holds securities reported herein) disclaims beneficial ownership of the securities held by the other Reporting Persons, except to the extent of such Reporting Person's pecuniary interest therein, and, pursuant to Rule 16a-1(a)(4) under the Securities Exchange Act of 1934, as amended, each of the Reporting Persons (other than to the extent it directly holds securities reported herein) states that the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership of all of the reported securities for purposes of Section 16 or for any other purpose.

Footnote F7

Information with respect to each of the Reporting Persons is given solely by such Reporting Person, and no Reporting Person has responsibility for the accuracy or completeness of information supplied by another Reporting Person.

Footnote F8

Shares of the Issuer's Class B common stock ("Class B Common Stock") have no economic value and have one vote per share. One share of Class B Common Stock is issued for each Common Unit held. Upon the sale of the Common Units, an equivalent number of shares of Class B Common Stock were automatically cancelled.

SEC remarks

Because no more than 10 reporting persons can file any one Form 4 through the Securities and Exchange Commission's EDGAR system, certain affiliates of the Reporting Persons have filed separate Forms 4.

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