# EDGAR Filing Document

**Accession Number:** 0002109734
**File Stem:** 0002109734-26-000004
**Filing Date:** 2026-5
**Character Count:** 8262
**Document Hash:** b450e3d6209c356bf212f95fad728e97
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0002109734-26-000004.hdr.sgml**: 20260513

**ACCESSION NUMBER**: 0002109734-26-000004

**CONFORMED SUBMISSION TYPE**: 13F-HR

**PUBLIC DOCUMENT COUNT**: 2

**CONFORMED PERIOD OF REPORT**: 20260331

**FILED AS OF DATE**: 20260513

**DATE AS OF CHANGE**: 20260513

**EFFECTIVENESS DATE**: 20260513

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Stembrook Asset Management, LLC
- **CENTRAL INDEX KEY:** 0002109734

**ORGANIZATION NAME:**
- **EIN:** 208832801
- **STATE OF INCORPORATION:** NJ
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 13F-HR
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 028-26355
- **FILM NUMBER:** 26972053

**BUSINESS ADDRESS:**
- **STREET 1:** 212 MAPLE AVENUE
- **STREET 2:** SUITE 201
- **CITY:** RED BANK
- **STATE:** NJ
- **ZIP:** 07701
- **BUSINESS PHONE:** 201-484-0063

**MAIL ADDRESS:**
- **STREET 1:** 212 MAPLE AVENUE
- **STREET 2:** SUITE 201
- **CITY:** RED BANK
- **STATE:** NJ
- **ZIP:** 07701

### FORM 13F COVER PAGE

**Report for the Calendar Year or Quarter Ended:** 03-31-2026

**Check here if Amendment** [ ] **Amendment Number:** 

**This Amendment (Check only one.):** [ ] is a restatement.

[ ] adds new holdings entries.

**Institutional Investment Manager Filing this Report:**

**Name:** Stembrook Asset Management LLC<br>**Address:** 212 MAPLE AVENUE<br>SUITE 201<br>RED BANK, NJ 07701

**Form 13F File Number:** 028-26355

The institutional investment manager filing this report and the person by whom it is signed hereby represent that the person signing the report is authorized to submit it, that all information contained herein is true, correct and complete, and that it is understood that all required items, statements, schedules, lists, and tables, are considered integral parts of this form.

**Person Signing this Report on Behalf of Reporting Manager:**

**Name:** Thomas Kosinski<br>**Title:** Chief Compliance Officer<br>**Phone:** 201-484-0063

**Signature, Place, and Date of Signing:**

/s/ Thomas Kosinski  Red Bank, NJ  05-13-2026<br>[Signature]  [City, State]  [Date]

**Report Type (Check only one.):**

[x] **13F HOLDINGS REPORT.** (Check here if all holdings of this reporting manager are reported in this report.)

[ ] **13F NOTICE.** (Check here if no holdings are reported in this report, and all holdings are reported by other reporting manager(s).)

[ ] **13F COMBINATION REPORT.** (Check here if a portion of the holdings for this reporting manager are reported in this report and a portion are reported by other reporting manager(s).)

### Form 13F Summary Page

**Report Summary:**

**Number of Other Included Managers:** 0

**Form 13F Information Table Entry Total:** 48

**Form 13F Information Table Value Total:** $102127046

      (round to nearest dollar)

**List of Other Included Managers:**

Provide a numbered list of the name(s) and Form 13F file number(s) of all institutional investment managers with respect to which this report is filed, other than the manager filing this report.

[If there are no entries in this list, state “NONE” and omit the column headings and list entries.]

**NONE**

### FORM 13F INFORMATION TABLE

---

|  |  |  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| NAME OF ISSUER | TITLE OF CLASS | CUSIP | FIGI | VALUE (x$1000) | SHRS OR PRN AMT | SH/PRN | PUT/CALL | INVESTMENT DISCRETION | OTHER MANAGER | VOTING AUTHORITY | VOTING AUTHORITY | VOTING AUTHORITY |
| NAME OF ISSUER | TITLE OF CLASS | CUSIP | FIGI | VALUE (x$1000) | SHRS OR PRN AMT | SH/PRN | PUT/CALL | INVESTMENT DISCRETION | OTHER MANAGER | SOLE | SHARED | NONE |
| ABBVIE INC | COM | 00287Y109 |  | 308184 | 1417 | SH |  | SOLE |  | 0 | 0 | 1417 |
| ADVANCED MICRO DEVICES INC | COM | 007903107 |  | 273410 | 1344 | SH |  | SOLE |  | 0 | 0 | 1344 |
| ALPHABET INC | CAP STK CL A | 02079K305 |  | 1670724 | 5810 | SH |  | SOLE |  | 0 | 0 | 5810 |
| AMAZON COM INC | COM | 023135106 |  | 528381 | 2537 | SH |  | SOLE |  | 0 | 0 | 2537 |
| AMERICAN EXPRESS CO | COM | 025816109 |  | 310950 | 1028 | SH |  | SOLE |  | 0 | 0 | 1028 |
| APPLE INC | COM | 037833100 |  | 35455225 | 139703 | SH |  | SOLE |  | 0 | 0 | 139703 |
| AUTOMATIC DATA PROCESSING IN | COM | 053015103 |  | 205822 | 1013 | SH |  | SOLE |  | 0 | 0 | 1013 |
| BERKSHIRE HATHAWAY INC DEL | CL B NEW | 084670702 |  | 1379138 | 2878 | SH |  | SOLE |  | 0 | 0 | 2878 |
| CAPITAL ONE FINL CORP | COM | 14040H105 |  | 638505 | 3500 | SH |  | SOLE |  | 0 | 0 | 3500 |
| CHEVRON CORPORATION | COM | 166764100 |  | 275591 | 1332 | SH |  | SOLE |  | 0 | 0 | 1332 |
| CISCO SYS INC | COM | 17275R102 |  | 410684 | 5293 | SH |  | SOLE |  | 0 | 0 | 5293 |
| COCA COLA CO | COM | 191216100 |  | 232790 | 3061 | SH |  | SOLE |  | 0 | 0 | 3061 |
| ELI LILLY  CO | COM | 532457108 |  | 368828 | 401 | SH |  | SOLE |  | 0 | 0 | 401 |
| EXXON MOBIL CORP | COM | 30231G102 |  | 525777 | 3099 | SH |  | SOLE |  | 0 | 0 | 3099 |
| GENERAL DYNAMICS CORP | COM | 369550108 |  | 423191 | 1233 | SH |  | SOLE |  | 0 | 0 | 1233 |
| GERON CORP | COM | 374163103 |  | 29800 | 20000 | SH |  | SOLE |  | 0 | 0 | 20000 |
| INTEL CORP | COM | 458140100 |  | 231198 | 5239 | SH |  | SOLE |  | 0 | 0 | 5239 |
| INVESCO QQQ TR | UNIT SER 1 | 46090E103 |  | 2267164 | 3928 | SH |  | SOLE |  | 0 | 0 | 3928 |
| JOHNSON  JOHNSON | COM | 478160104 |  | 576634 | 2359 | SH |  | SOLE |  | 0 | 0 | 2359 |
| JPMORGAN CHASE  CO | COM | 46625H100 |  | 441240 | 1500 | SH |  | SOLE |  | 0 | 0 | 1500 |
| LOCKHEED MARTIN CORP | COM | 539830109 |  | 402524 | 666 | SH |  | SOLE |  | 0 | 0 | 666 |
| LOWES COS INC | COM | 548661107 |  | 341189 | 1444 | SH |  | SOLE |  | 0 | 0 | 1444 |
| MARATHON PETE CORP | COM | 56585A102 |  | 624125 | 2556 | SH |  | SOLE |  | 0 | 0 | 2556 |
| MERCK  CO INC | COM | 58933Y105 |  | 245392 | 2040 | SH |  | SOLE |  | 0 | 0 | 2040 |
| MICROSOFT CORP | COM | 594918104 |  | 929127 | 2510 | SH |  | SOLE |  | 0 | 0 | 2510 |
| NVIDIA CORPORATION | COM | 67066G104 |  | 313397 | 1797 | SH |  | SOLE |  | 0 | 0 | 1797 |
| ORACLE CORP | COM | 68389X105 |  | 353653 | 2404 | SH |  | SOLE |  | 0 | 0 | 2404 |
| PARKER-HANNIFIN CORP | COM | 701094104 |  | 295430 | 330 | SH |  | SOLE |  | 0 | 0 | 330 |
| PFIZER INC | COM | 717081103 |  | 286164 | 10191 | SH |  | SOLE |  | 0 | 0 | 10191 |
| PHILIP MORRIS INTL INC | COM | 718172109 |  | 235775 | 1426 | SH |  | SOLE |  | 0 | 0 | 1426 |
| PROCTER  GAMBLE CO | COM | 742718109 |  | 223594 | 1548 | SH |  | SOLE |  | 0 | 0 | 1548 |
| PROGRESSIVE CORP | COM | 743315103 |  | 224025 | 1130 | SH |  | SOLE |  | 0 | 0 | 1130 |
| RTX CORPORATION | COM | 75513E101 |  | 272954 | 1415 | SH |  | SOLE |  | 0 | 0 | 1415 |
| S GLOBAL INC | COM | 78409V104 |  | 325811 | 766 | SH |  | SOLE |  | 0 | 0 | 766 |
| SCHWAB STRATEGIC TR | US SML CAP ETF | 808524607 |  | 231710 | 7968 | SH |  | SOLE |  | 0 | 0 | 7968 |
| SCHWAB STRATEGIC TR | INTL EQTY ETF | 808524805 |  | 376250 | 15202 | SH |  | SOLE |  | 0 | 0 | 15202 |
| SCHWAB STRATEGIC TR | US LRG CAP ETF | 808524201 |  | 557927 | 21760 | SH |  | SOLE |  | 0 | 0 | 21760 |
| STARBUCKS CORP | COM | 855244109 |  | 268770 | 3000 | SH |  | SOLE |  | 0 | 0 | 3000 |
| STATE STR SPDR S 500 ETF T | TR UNIT | 78462F103 |  | 17068824 | 26246 | SH |  | SOLE |  | 0 | 0 | 26246 |
| UMB FINL CORP | COM | 902788108 |  | 481501 | 4269 | SH |  | SOLE |  | 0 | 0 | 4269 |
| UNION PAC CORP | COM | 907818108 |  | 376789 | 1553 | SH |  | SOLE |  | 0 | 0 | 1553 |
| VANGUARD BD INDEX FDS | TOTAL BND MRKT | 921937835 |  | 8470662 | 115028 | SH |  | SOLE |  | 0 | 0 | 115028 |
| VANGUARD INDEX FDS | SM CP VAL ETF | 922908611 |  | 1379755 | 6351 | SH |  | SOLE |  | 0 | 0 | 6351 |
| VANGUARD INDEX FDS | EXTEND MKT ETF | 922908652 |  | 2998918 | 14572 | SH |  | SOLE |  | 0 | 0 | 14572 |
| VANGUARD INTL EQUITY INDEX F | FTSE EMR MKT ETF | 922042858 |  | 1290444 | 23875 | SH |  | SOLE |  | 0 | 0 | 23875 |
| VANGUARD MUN BD FDS | TAX EXEMPT BD | 922907746 |  | 7023814 | 140786 | SH |  | SOLE |  | 0 | 0 | 140786 |
| VANGUARD TAX-MANAGED FDS | VAN FTSE DEV MKT | 921943858 |  | 9446226 | 147413 | SH |  | SOLE |  | 0 | 0 | 147413 |
| WALMART INC | COM | 931142103 |  | 529060 | 4257 | SH |  | SOLE |  | 0 | 0 | 4257 |

---