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Institutional investment manager
PORTMAN SQUARE CAPITAL LLP
CIK 0001966898
- Reported holdings value
- $1.77B
- Reported positions
- 87
- Report as of
- 2026-09-30
- Filed on
- 2026-10-15
Reported holdings & quarterly changes
Compared with Q2 2026. All security classes provided by the filing are included.
| IREN IREN LIMITED Q4982L109 | ORDINARY SHARES PUT · SH | 4,772,000 | $195.08M | 11.05% | +675,800 | +16.50% | Increased |
| BABA ALIBABA GROUP HLDG LTD 01609W102 | SPONSORED ADS PUT · SH | 1,566,200 | $168.43M | 9.54% | +385,300 | +32.63% | Increased |
| SMTC SEMTECH CORP 816850101 | COM PUT · SH | 756,400 | $134.9M | 7.64% | +715,800 | +1763.05% | Increased |
| W WAYFAIR INC 94419L101 | CL A PUT · SH | 988,400 | $101.37M | 5.74% | +418,900 | +73.56% | Increased |
| RDDT REDDIT INC 75734B100 | CL A PUT · SH | 619,300 | $88.21M | 5.00% | +207,200 | +50.28% | Increased |
| W WAYFAIR INC 94419L101 | CL A Share · SH | 745,851 | $76.49M | 4.33% | +336,502 | +82.20% | Increased |
| BABA ALIBABA GROUP HLDG LTD 01609W102 | SPONSORED ADS Share · SH | 683,622 | $73.52M | 4.16% | -12,096 | -1.74% | Reduced |
| RDDT REDDIT INC 75734B100 | CL A Share · SH | 478,773 | $68.2M | 3.86% | +164,901 | +52.54% | Increased |
| GLD SPDR GOLD TR 78463V107 | GOLD SHS CALL · SH | 120,000 | $45.7M | 2.59% | -230,000 | -65.71% | Reduced |
| AKAM AKAMAI TECHNOLOGIES INC 00971T101 | COM PUT · SH | 380,600 | $40.48M | 2.29% | -3,700 | -0.96% | Reduced |
| NET CLOUDFLARE INC 18915M107 | CL A COM PUT · SH | 113,100 | $39.28M | 2.22% | +48,600 | +75.35% | Increased |
| ALB ALBEMARLE CORP 012653101 | COM PUT · SH | 367,800 | $38.91M | 2.20% | +13,600 | +3.84% | Increased |
| LYV LIVE NATION ENTERTAINMENT IN 538034109 | COM PUT · SH | 213,000 | $36.06M | 2.04% | +201,000 | +1675.00% | Increased |
| NET CLOUDFLARE INC 18915M107 | CL A COM Share · SH | 75,939 | $26.37M | 1.49% | — | — | Newly reported |
| MCHP MICROCHIP TECHNOLOGY INC. 595017104 | COM PUT · SH | 316,500 | $24.61M | 1.39% | -210,600 | -39.95% | Reduced |
| PCG PG&E CORP 69331C108 | COM PUT · SH | 1,913,000 | $23.43M | 1.33% | -1,190,300 | -38.36% | Reduced |
| BA BOEING CO 097023105 | COM PUT · SH | 125,200 | $23.29M | 1.32% | — | — | Newly reported |
| ON ON SEMICONDUCTOR CORP 682189105 | COM PUT · SH | 298,500 | $22.95M | 1.30% | +21,200 | +7.65% | Increased |
| GPN GLOBAL PMTS INC 37940X102 | COM PUT · SH | 270,000 | $22.05M | 1.25% | -3,800 | -1.39% | Reduced |
| 30034WAD8 EVERGY INC 30034WAD8 | NOTE 4.500%12/1 Share · PRN | 15,800,000 | $20.25M | 1.15% | 0 | 0.00% | Unchanged |
| STX SEAGATE TECHNOLOGY HLDNGS PL G7997R103 | ORD SHS Share · SH | 21,086 | $19.45M | 1.10% | -4,081 | -16.22% | Reduced |
| GOOG ALPHABET INC 02079K107 | CAP STK CL C PUT · SH | 57,000 | $19.42M | 1.10% | — | — | Newly reported |
| TTEK TETRA TECH INC NEW 88162G103 | COM PUT · SH | 582,700 | $19.2M | 1.09% | -102,700 | -14.98% | Reduced |
| FE FIRSTENERGY CORP 337932107 | COM PUT · SH | 407,100 | $17.64M | 1.00% | -70,800 | -14.81% | Reduced |
| 337932AV9 FIRSTENERGY CORP 337932AV9 | NOTE 3.875% 1/1 Share · PRN | 16,600,000 | $17.16M | 0.97% | -8,000,000 | -32.52% | Reduced |
| GH GUARDANT HEALTH INC 40131M109 | COM PUT · SH | 94,800 | $16.91M | 0.96% | 0 | 0.00% | Unchanged |
| FLR FLUOR CORP 343412102 | COM PUT · SH | 339,400 | $16.25M | 0.92% | +43,700 | +14.78% | Increased |
| ITRI ITRON INC 465741106 | COM PUT · SH | 179,700 | $15.52M | 0.88% | -5,600 | -3.02% | Reduced |
| NEE NEXTERA ENERGY INC 65339F101 | COM PUT · SH | 196,400 | $14.88M | 0.84% | -1,132,500 | -85.22% | Reduced |
| ALNY ALNYLAM PHARMACEUTICALS INC 02043Q107 | COM PUT · SH | 59,700 | $14.73M | 0.83% | +13,500 | +29.22% | Increased |
| MP MP MATERIALS CORP 553368101 | COM CL A Share · SH | 301,468 | $14.26M | 0.81% | — | — | Newly reported |
| SO SOUTHERN CO 842587107 | COM PUT · SH | 167,100 | $13.85M | 0.78% | -713,100 | -81.02% | Reduced |
| SOFI SOFI TECHNOLOGIES INC 83406F102 | COM Share · SH | 784,273 | $12.33M | 0.70% | — | — | Newly reported |
| 69331C306 PG&E CORP 69331C306 | PFD CONV SER A Share · SH | 381,000 | $12.05M | 0.68% | 0 | 0.00% | Unchanged |
| WGO WINNEBAGO INDS INC 974637100 | COM CALL · SH | 451,000 | $11.89M | 0.67% | -130,900 | -22.50% | Reduced |
| 595017302 MICROCHIP TECHNOLOGY INC. 595017302 | DEP SHS REPSTG Share · SH | 175,500 | $11.73M | 0.66% | -274,500 | -61.00% | Reduced |
| ON ON SEMICONDUCTOR CORP 682189105 | COM Share · SH | 141,288 | $10.86M | 0.61% | +106,223 | +302.93% | Increased |
| ENOV ENOVIS CORPORATION 194014502 | COM CALL · SH | 553,000 | $10.1M | 0.57% | -10,800 | -1.92% | Reduced |
| 76954AAD5 RIVIAN AUTOMOTIVE INC 76954AAD5 | NOTE 3.625%10/1 Share · PRN | 10,000,000 | $10.08M | 0.57% | — | — | Newly reported |
| COMP COMPASS INC 20464U100 | CL A PUT · SH | 1,100,000 | $9.77M | 0.55% | — | — | Newly reported |
| 91232N207 UNITED STS OIL FD LP 91232N207 | UNITS PUT · SH | 66,200 | $9.64M | 0.55% | -8,800 | -11.73% | Reduced |
| TYL TYLER TECHNOLOGIES INC 902252105 | COM PUT · SH | 29,800 | $9.49M | 0.54% | — | — | Newly reported |
| RIVN RIVIAN AUTOMOTIVE INC 76954A103 | COM CL A PUT · SH | 630,000 | $9.41M | 0.53% | — | — | Newly reported |
| CRWV COREWEAVE INC 21873S108 | COM CL A PUT · SH | 90,000 | $7.84M | 0.44% | — | — | Newly reported |
| O REALTY INCOME CORP 756109104 | COM PUT · SH | 142,200 | $7.72M | 0.44% | 0 | 0.00% | Unchanged |
| KWEB KRANESHARES TRUST 500767306 | CSI CHI INTERNET CALL · SH | 299,500 | $7.34M | 0.42% | +199,500 | +199.50% | Increased |
| SOFI SOFI TECHNOLOGIES INC 83406F102 | COM PUT · SH | 457,600 | $7.19M | 0.41% | — | — | Newly reported |
| SPB SPECTRUM BRANDS HOLDINGS INC 84790A105 | COM PUT · SH | 90,100 | $7.16M | 0.41% | — | — | Newly reported |
| BL BLACKLINE INC 09239B109 | COM PUT · SH | 268,100 | $7.11M | 0.40% | -171,700 | -39.04% | Reduced |
| AKAM AKAMAI TECHNOLOGIES INC 00971T101 | COM Share · SH | 66,442 | $7.07M | 0.40% | -111,635 | -62.69% | Reduced |
1–50 of 114 reported positions and changes
How to read this table
This table shows the institution’s holdings reported to the SEC for the selected quarter and changes compared with the previous quarter.
- Security / CUSIP
- The security’s ticker symbol, such as AAPL, alongside its CUSIP, a unique security identifier. If no ticker is available, the security may be identified by its CUSIP only.
- Class / Position
- The security type or share class as stated in the filing, such as common stock (COM) or a specific class of shares.
- Shares / Units
- The number of shares or units the institution reported holding.
- Value (USD)
- The total value of the position in US dollars as of the reporting date.
- Weight
- The position’s share of the total reported holdings value. For example, a 12.55% weight means AAPL accounts for approximately 12.55% of that reported value.
- Share change
- The change in the number of shares compared with the previous quarter. A plus sign (+) indicates an increase; a minus sign (−) indicates a decrease.
- Change %
- The percentage change in the number of shares compared with the previous quarter. For example, +52.25% means the reported share count increased by approximately 52.25%.
- Reported activity
- Increased: the reported quantity rose. Reduced: it fell. Unchanged: it stayed the same. Newly reported: the position appears in the current filing but not in the previous one. No longer reported: it appeared in the previous filing but not in the current one.
Important: These changes compare quantities reported in filings; they do not necessarily document the exact timing of purchases or sales. In particular, “Newly reported” does not necessarily mean the security was purchased during that quarter.
Source: FMP Ultimate / SEC Form 13F. Report as of 2026-09-30; filed 2026-10-15. Changes compare reported quantities, not confirmed transactions. “Newly reported” and “No longer reported” do not establish exact purchase or sale dates. 13F covers reportable securities, not the institution’s total assets under management.