# EDGAR Filing Document

**Accession Number:** 0001966898
**File Stem:** 0001172661-26-001542
**Filing Date:** 2026-4
**Character Count:** 14225
**Document Hash:** 6a1809a09946c9c29c3aa717014b4478
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001172661-26-001542.hdr.sgml**: 20260427

**ACCESSION NUMBER**: 0001172661-26-001542

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

**PUBLIC DOCUMENT COUNT**: 2

**CONFORMED PERIOD OF REPORT**: 20260331

**FILED AS OF DATE**: 20260427

**DATE AS OF CHANGE**: 20260427

**EFFECTIVENESS DATE**: 20260427

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Portman Square Capital LLP
- **CENTRAL INDEX KEY:** 0001966898

**ORGANIZATION NAME:**
- **EIN:** 000000000
- **STATE OF INCORPORATION:** X0
- **FISCAL YEAR END:** 0331

**FILING VALUES:**
- **FORM TYPE:** 13F-HR
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 028-23143
- **FILM NUMBER:** 26901392

**BUSINESS ADDRESS:**
- **ADDRESS IS A NON US LOCATION:** YES
- **STREET 1:** 10 PORTMAN SQUARE
- **CITY:** LONDON
- **PROVINCE COUNTRY:** X0
- **ZIP:** W1H 6AZ
- **BUSINESS PHONE:** 44-203-627-6800

**MAIL ADDRESS:**
- **ADDRESS IS A NON US LOCATION:** YES
- **STREET 1:** 10 PORTMAN SQUARE
- **CITY:** LONDON
- **PROVINCE COUNTRY:** X0
- **ZIP:** W1H 6AZ

### 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:** Portman Square Capital LLP<br>**Address:** 10 Portman Square<br>London, X0 W1H 6AZ

**Form 13F File Number:** 028-23143

**CRD Number (if applicable):** 000319011

**SEC File Number (if applicable):** 801-126696

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:** Petros Toseland<br>**Title:** CCO<br>**Phone:** 44-203-627-6800

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

/s/ Petros Toseland  London, X0  04-27-2026<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:** 102

**Form 13F Information Table Value Total:** $2596771574

      (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 |
| ADVANCED ENERGY INDS | COM | 007973100 |  | 18071760 | 56000 | SH | Put | SOLE |  | 56000 | 0 | 0 |
| AKAMAI TECHNOLOGIES INC | COM | 00971T101 |  | 39531370 | 344200 | SH | Put | SOLE |  | 344200 | 0 | 0 |
| ALBEMARLE CORP | COM | 012653101 |  | 15585179 | 86811 | SH |  | SOLE |  | 86811 | 0 | 0 |
| ALBEMARLE CORP | 7.25% DEP SHS A | 012653200 |  | 38962820 | 541000 | SH |  | SOLE |  | 541000 | 0 | 0 |
| ALBEMARLE CORP | COM | 012653101 |  | 66102946 | 368200 | SH | Put | SOLE |  | 368200 | 0 | 0 |
| ALIBABA GROUP HLDG LTD | SPONSORED ADS | 01609W102 |  | 37010700 | 295000 | SH | Put | SOLE |  | 295000 | 0 | 0 |
| ALNYLAM PHARMACEUTICALS INC | COM | 02043Q107 |  | 5599644 | 16924 | SH |  | SOLE |  | 16924 | 0 | 0 |
| ALNYLAM PHARMACEUTICALS INC | COM | 02043Q107 |  | 12539973 | 37900 | SH | Put | SOLE |  | 37900 | 0 | 0 |
| APOLLO GLOBAL MGMT INC | COM | 03769M106 |  | 779940 | 7000 | SH | Call | SOLE |  | 7000 | 0 | 0 |
| ARES MANAGEMENT CORPORATION | 6.75 SE B PFD | 03990B309 |  | 11409840 | 312000 | SH |  | SOLE |  | 312000 | 0 | 0 |
| ARES MANAGEMENT CORPORATION | CL A COM STK | 03990B101 |  | 33493700 | 307000 | SH | Put | SOLE |  | 307000 | 0 | 0 |
| BLACKLINE INC | COM | 09239B109 |  | 16287400 | 440200 | SH | Put | SOLE |  | 440200 | 0 | 0 |
| BLACKSTONE INC | COM | 09260D107 |  | 689940 | 6000 | SH | Call | SOLE |  | 6000 | 0 | 0 |
| BLUE OWL CAPITAL INC | COM CL A | 09581B103 |  | 273900 | 30000 | SH | Call | SOLE |  | 30000 | 0 | 0 |
| BOEING CO | DEP CONV PFD A | 097023204 |  | 23043880 | 356000 | SH |  | SOLE |  | 356000 | 0 | 0 |
| BOEING CO | COM | 097023105 |  | 61858524 | 310800 | SH | Put | SOLE |  | 310800 | 0 | 0 |
| BRIDGEBIO PHARMA INC | COM | 10806X102 |  | 4455600 | 60000 | SH | Put | SOLE |  | 60000 | 0 | 0 |
| BRIDGEBIO PHARMA INC | COM | 10806X102 |  | 9921136 | 133600 | SH | Call | SOLE |  | 133600 | 0 | 0 |
| CARLYLE GROUP INC | COM | 14316J108 |  | 677460 | 14000 | SH | Call | SOLE |  | 14000 | 0 | 0 |
| CLOUDFLARE INC | CL A COM | 18915M107 |  | 12999420 | 63000 | SH | Put | SOLE |  | 63000 | 0 | 0 |
| CLOUDFLARE INC | CL A COM | 18915M107 |  | 1501743 | 7278 | SH |  | SOLE |  | 7278 | 0 | 0 |
| COREWEAVE INC | COM CL A | 21873S108 |  | 42608500 | 550000 | SH | Put | SOLE |  | 550000 | 0 | 0 |
| ENOVIS CORPORATION | COM | 194014502 |  | 22718150 | 998600 | SH | Call | SOLE |  | 998600 | 0 | 0 |
| EVERGY INC | NOTE 4.500%12/1 | 30034WAD8 |  | 27005000 | 20000000 | PRN |  | SOLE |  | 20000000 | 0 | 0 |
| EVERGY INC | COM | 30034W106 |  | 15155200 | 185000 | SH | Put | SOLE |  | 185000 | 0 | 0 |
| FIRSTENERGY CORP | COM | 337932107 |  | 25578234 | 504900 | SH | Put | SOLE |  | 504900 | 0 | 0 |
| FLUOR CORP | COM | 343412102 |  | 18930570 | 405800 | SH | Put | SOLE |  | 405800 | 0 | 0 |
| FLUOR CORP | COM | 343412102 |  | 4657723 | 99844 | SH |  | SOLE |  | 99844 | 0 | 0 |
| GLOBAL PMTS INC | COM | 37940X102 |  | 18426740 | 273800 | SH | Put | SOLE |  | 273800 | 0 | 0 |
| GLOBAL PMTS INC | COM | 37940X102 |  | 14799270 | 219900 | SH | Call | SOLE |  | 219900 | 0 | 0 |
| GUARDANT HEALTH INC | DEBT 1.250% 2/1 | 40131MAD1 |  | 16828346 | 10000000 | PRN |  | SOLE |  | 10000000 | 0 | 0 |
| GUARDANT HEALTH INC | COM | 40131M109 |  | 9237000 | 100000 | SH | Put | SOLE |  | 100000 | 0 | 0 |
| HAMILTON LANE INC | CL A | 407497106 |  | 218680 | 2200 | SH | Call | SOLE |  | 2200 | 0 | 0 |
| HEWLETT PACKARD ENTERPRISE C | COM | 42824C109 |  | 79330158 | 3331800 | SH | Put | SOLE |  | 3331800 | 0 | 0 |
| HEWLETT PACKARD ENTERPRISE C | 7.625 MAND CONV | 42824C208 |  | 14320900 | 220000 | SH |  | SOLE |  | 220000 | 0 | 0 |
| HEWLETT PACKARD ENTERPRISE C | COM | 42824C109 |  | 4488280 | 188504 | SH |  | SOLE |  | 188504 | 0 | 0 |
| IREN LIMITED | ORDINARY SHARES | Q4982L109 |  | 6049254 | 176466 | SH |  | SOLE |  | 176466 | 0 | 0 |
| ITRON INC | COM | 465741106 |  | 16608439 | 185300 | SH | Put | SOLE |  | 185300 | 0 | 0 |
| JAZZ INVESTMENTS I LTD | NOTE 3.125% 9/1 | 472145AH4 |  | 17731250 | 12500000 | PRN |  | SOLE |  | 12500000 | 0 | 0 |
| JAZZ PHARMACEUTICALS PLC | SHS USD | G50871105 |  | 10019650 | 53000 | SH | Put | SOLE |  | 53000 | 0 | 0 |
| KKR  CO INC | COM | 48251W104 |  | 647500 | 7000 | SH | Call | SOLE |  | 7000 | 0 | 0 |
| KRANESHARES TRUST | CSI CHI INTERNET | 500767306 |  | 3980200 | 140000 | SH |  | SOLE |  | 140000 | 0 | 0 |
| KRANESHARES TRUST | CSI CHI INTERNET | 500767306 |  | 9239750 | 325000 | SH | Call | SOLE |  | 325000 | 0 | 0 |
| LIVE NATION ENTERTAINMENT IN | COM | 538034109 |  | 36144870 | 237000 | SH | Put | SOLE |  | 237000 | 0 | 0 |
| LUCID GROUP INC | COM NEW | 549498202 |  | 4398190 | 461510 | SH |  | SOLE |  | 461510 | 0 | 0 |
| LUCID GROUP INC | COM NEW | 549498202 |  | 8820015 | 925500 | SH | Put | SOLE |  | 925500 | 0 | 0 |
| MICROCHIP TECHNOLOGY INC. | COM | 595017104 |  | 52838058 | 817800 | SH | Put | SOLE |  | 817800 | 0 | 0 |
| MICROCHIP TECHNOLOGY INC. | DEP SHS REPSTG | 595017302 |  | 67462625 | 1175000 | SH |  | SOLE |  | 1175000 | 0 | 0 |
| NEBIUS GROUP N.V. | SHS CLASS A | N97284108 |  | 66333768 | 639300 | SH | Put | SOLE |  | 639300 | 0 | 0 |
| NEBIUS GROUP N.V. | SHS CLASS A | N97284108 |  | 3640627 | 35087 | SH |  | SOLE |  | 35087 | 0 | 0 |
| NEXTERA ENERGY INC | UNIT 11/01/2027 | 65339F119 |  | 2672655 | 51000 | SH |  | SOLE |  | 51000 | 0 | 0 |
| NEXTERA ENERGY INC | COM | 65339F101 |  | 202998528 | 2185600 | SH | Put | SOLE |  | 2185600 | 0 | 0 |
| NEXTERA ENERGY INC | UNIT 06/01/2027 | 65339F663 |  | 5654000 | 100000 | SH |  | SOLE |  | 100000 | 0 | 0 |
| NEXTERA ENERGY INC | COM | 65339F101 |  | 35795673 | 385397 | SH |  | SOLE |  | 385397 | 0 | 0 |
| NEXTERA ENERGY INC | UNIT 02/15/2029 | 65339F655 |  | 28974250 | 575000 | SH |  | SOLE |  | 575000 | 0 | 0 |
| NOVANTA INC | COM | 67000B104 |  | 27354276 | 231600 | SH | Put | SOLE |  | 231600 | 0 | 0 |
| NOVANTA INC | UNIT 11/01/2028 | 67000B203 |  | 51410155 | 960000 | SH |  | SOLE |  | 960000 | 0 | 0 |
| ON SEMICONDUCTOR CORP | COM | 682189105 |  | 27969264 | 451700 | SH | Put | SOLE |  | 451700 | 0 | 0 |
| ON SEMICONDUCTOR CORP | COM | 682189105 |  | 5952617 | 96134 | SH |  | SOLE |  | 96134 | 0 | 0 |
| ORACLE CORP | COM | 68389X105 |  | 66935050 | 455000 | SH | Put | SOLE |  | 455000 | 0 | 0 |
| ORACLE CORP | COM | 68389X105 |  | 9853869 | 66983 | SH |  | SOLE |  | 66983 | 0 | 0 |
| OSI SYSTEMS INC | NOTE 2.250% 8/0 | 671044AF2 |  | 10746750 | 7000000 | PRN |  | SOLE |  | 7000000 | 0 | 0 |
| OSI SYSTEMS INC | COM | 671044105 |  | 10062829 | 37900 | SH | Put | SOLE |  | 37900 | 0 | 0 |
| PG CORP | PFD CONV SER A | 69331C306 |  | 16469104 | 381000 | SH |  | SOLE |  | 381000 | 0 | 0 |
| PG CORP | COM | 69331C108 |  | 66823981 | 3803300 | SH | Put | SOLE |  | 3803300 | 0 | 0 |
| PG CORP | COM | 69331C108 |  | 5530562 | 314773 | SH |  | SOLE |  | 314773 | 0 | 0 |
| PPL CORP | UNIT 02/15/2029 | 69351T866 |  | 78267150 | 1530000 | SH |  | SOLE |  | 1530000 | 0 | 0 |
| PPL CORP | COM | 69351T106 |  | 67805000 | 1775000 | SH | Put | SOLE |  | 1775000 | 0 | 0 |
| REALTY INCOME CORP | COM | 756109104 |  | 566160 | 9254 | SH |  | SOLE |  | 9254 | 0 | 0 |
| REALTY INCOME CORP | COM | 756109104 |  | 18555894 | 303300 | SH | Put | SOLE |  | 303300 | 0 | 0 |
| REDDIT INC | CL A | 75734B100 |  | 34551190 | 256600 | SH | Put | SOLE |  | 256600 | 0 | 0 |
| REDDIT INC | CL A | 75734B100 |  | 7351890 | 54600 | SH |  | SOLE |  | 54600 | 0 | 0 |
| SHIFT4 PMTS INC | 6 SER A CNV PREF | 82452J307 |  | 8487800 | 155000 | SH |  | SOLE |  | 155000 | 0 | 0 |
| SHIFT4 PMTS INC | CL A | 82452J109 |  | 8632302 | 197400 | SH | Put | SOLE |  | 197400 | 0 | 0 |
| SOFI TECHNOLOGIES INC | COM | 83406F102 |  | 599518 | 37753 | SH |  | SOLE |  | 37753 | 0 | 0 |
| SOUTHERN CO | COM | 842587107 |  | 95236284 | 986700 | SH | Put | SOLE |  | 986700 | 0 | 0 |
| SOUTHERN CO | COM | 842587107 |  | 4283075 | 44375 | SH |  | SOLE |  | 44375 | 0 | 0 |
| SOUTHERN CO | UNIT 12/15/2028 | 842587842 |  | 69178557 | 1336000 | SH |  | SOLE |  | 1336000 | 0 | 0 |
| SPDR GOLD TR | GOLD SHS | 78463V107 |  | 15490440 | 36000 | SH |  | SOLE |  | 36000 | 0 | 0 |
| SPDR GOLD TR | GOLD SHS | 78463V107 |  | 336701925 | 782500 | SH | Call | SOLE |  | 782500 | 0 | 0 |
| SPDR GOLD TR | GOLD SHS | 78463V107 |  | 21514500 | 50000 | SH | Put | SOLE |  | 50000 | 0 | 0 |
| SPECTRUM BRANDS HOLDINGS INC | COM | 84790A105 |  | 21343520 | 289600 | SH | Call | SOLE |  | 289600 | 0 | 0 |
| STARWOOD PPTY TR INC | NOTE 6.750% 7/1 | 85571BBA2 |  | 8162000 | 8000000 | PRN |  | SOLE |  | 8000000 | 0 | 0 |
| STARWOOD PPTY TR INC | COM | 85571B105 |  | 1134677 | 65893 | SH |  | SOLE |  | 65893 | 0 | 0 |
| STARWOOD PPTY TR INC | COM | 85571B105 |  | 25847220 | 1501000 | SH | Put | SOLE |  | 1501000 | 0 | 0 |
| SYNAPTICS INC | COM | 87157D109 |  | 10246852 | 146300 | SH | Put | SOLE |  | 146300 | 0 | 0 |
| SYNAPTICS INC | COM | 87157D109 |  | 2333873 | 33322 | SH |  | SOLE |  | 33322 | 0 | 0 |
| TETRA TECH INC NEW | COM | 88162G103 |  | 4339117 | 144061 | SH |  | SOLE |  | 144061 | 0 | 0 |
| TETRA TECH INC NEW | COM | 88162G103 |  | 20647260 | 685500 | SH | Put | SOLE |  | 685500 | 0 | 0 |
| TPG INC | COM CL A | 872657101 |  | 607650 | 15000 | SH | Call | SOLE |  | 15000 | 0 | 0 |
| UGI CORP NEW | COM | 902681105 |  | 35564130 | 976500 | SH | Put | SOLE |  | 976500 | 0 | 0 |
| UNITED STS OIL FD LP | UNITS | 91232N207 |  | 14455600 | 113600 | SH | Call | SOLE |  | 113600 | 0 | 0 |
| UNITED STS OIL FD LP | UNITS | 91232N207 |  | 17980425 | 141300 | SH | Put | SOLE |  | 141300 | 0 | 0 |
| UPSTART HLDGS INC | COM | 91680M107 |  | 302927 | 11810 | SH |  | SOLE |  | 11810 | 0 | 0 |
| VOYAGER TECHNOLOGIES INC | COM CL A | 92892B103 |  | 671293 | 28700 | SH |  | SOLE |  | 28700 | 0 | 0 |
| WAYFAIR INC | CL A | 94419L101 |  | 13691153 | 182039 | SH |  | SOLE |  | 182039 | 0 | 0 |
| WAYFAIR INC | CL A | 94419L101 |  | 564075 | 7500 | SH | Put | SOLE |  | 7500 | 0 | 0 |
| WEC ENERGY GROUP INC | COM | 92939U106 |  | 13313550 | 115000 | SH | Put | SOLE |  | 115000 | 0 | 0 |
| WINNEBAGO INDS INC | COM | 974637100 |  | 18200427 | 587300 | SH | Call | SOLE |  | 587300 | 0 | 0 |
| XEROX HOLDINGS CORP | COM NEW | 98421M106 |  | 21681 | 16807 | SH |  | SOLE |  | 16807 | 0 | 0 |
| ZTO EXPRESS CAYMAN INC | SPONSORED ADS A | 98980A105 |  | 13878738 | 551400 | SH | Put | SOLE |  | 551400 | 0 | 0 |
| ZTO EXPRESS CAYMAN INC | SPONSORED ADS A | 98980A105 |  | 2026336 | 80506 | SH |  | SOLE |  | 80506 | 0 | 0 |

---