Portman Square Capital LLP
Registered adviserRegulatory profile
From Form ADV, the SEC filer profile, 13D/13G type codes and N-CEN, never from the name.
| Rosters | Regulatory AUM | Main clients |
|---|---|---|
| Jun 2026 to Nov 2026 | $4,581,447,405 | Pooled investment vehicles (100%) |
| Jun 2025 to May 2026 | $3,361,686,579 | Pooled investment vehicles (100%) |
| Jul 2024 to May 2025 | $4,153,366,509 | Pooled investment vehicles (100%) |
| Jul 2023 to Jun 2024 | $1,626,645,000 | Pooled investment vehicles (100%) |
| May 2023 to Jun 2023 | $693,350,916 | Pooled investment vehicles (100%) |
| Nov 2022 to Apr 2023 | $693,350,916 | Pooled investment vehicles (100%) |
In the firm's words
- Multi-asset:
Equity, FX, rates, credit and hybrid volatility strategies are used in combination to either run long volatility exposure or to generate “carry” with a capped downside exposure.
- Fixed income / rates:
Equity, FX, rates, credit and hybrid volatility strategies are used in combination to either run long volatility exposure or to generate “carry” with a capped downside exposure.
- Long/short hedge:
The strategy is market-neutral and structurally long volatility.
Portfolio style
Measured from the filed 13F common-share book for Jun 30, 2026, the newest measured quarter, never from the firm's own description.
Closest benchmark: the Nasdaq-100 as of 2026-06-30, active share 97.7%; sector active share 50.0% against the combined 13F book's sector weights.
Over time 15 measured quarters
How the bands are measured
Style bands measure the filed 13F common-share book each closed quarter, tested in this order. Unknown: under $10,000,000 of valued equity or 5 stocks. Index-like (100+ stocks): active share of 20% or less against the closest benchmark, which is the S&P 500, S&P MidCap 400, S&P SmallCap 600, Russell 1000, Russell 2000, Nasdaq-100 or Dow Jones Industrial Average (weighted by an index-tracking fund's reported holdings or the index's constituents nearest the quarter end, over the names resolved to companies, and only when those are 90%+ of its weight) or every 13F filer's combined book, or index series holding 80%+ of the registered fund assets it advises (N-CEN) and equal to 50%+ of its book. Systematic-like: 500+ stocks, 100%+ annual turnover and a top 10 weight of 25% or less. Concentrated: a top 10 weight of 60%+ or 12 or fewer effective positions. Diversified active: none of these. Turnover is the smaller of buys and sells over average equity value, summed over four quarters: low under 30%, high 100%+. Horizon is the value-weighted number of quarters each position has been held: short under 4, long 12+.
Clone Performance
Build a hypothetical price-return history from this filer's public 13F holdings.
View clone backtestPortfolio Concentration
56 tracked positions · as of Sep 30, 2026 · Δ vs Jun 30, 2026Portfolio Trend
Sector Breakdown
As of Sep 30, 2026| Sector | % Portfolio | Value |
|---|---|---|
| Consumer Cyclical | 26.6% | $446,265,691 |
| Technology | 23.4% | $392,125,388 |
| Communication Services | 12.9% | $216,741,598 |
| Financial Services | 12.9% | $216,222,198 |
| Industrials | 6.0% | $100,693,408 |
| Utilities | 5.1% | $86,228,283 |
| Unclassified | 4.8% | $80,898,096 |
| Basic Materials | 3.9% | $64,853,753 |
| Healthcare | 2.9% | $48,808,109 |
| Real Estate | 1.0% | $17,489,460 |
| Consumer Defensive | 0.4% | $7,163,851 |
Last Quarter's Activity
Export CSVAdded To
Positions the filer increased| Ticker | Company | Δ Shares | Shares | Value | Open |
|---|---|---|---|---|---|
| W | Wayfair Inc. | +336,502 | 745,851 | $76,494,478 | |
| RDDT | Reddit, Inc. | +164,901 | 478,773 | $68,196,426 | |
| ON | On Semiconductor Corp | +106,223 | 141,288 | $10,860,808 | |
| TTEK | Tetra Tech Inc | +50,949 | 164,358 | $5,415,596 | |
| ALB | Albemarle Corp | +32,851 | 55,493 | $5,870,049 | |
| UPST | Upstart Holdings, Inc. | +26,190 | 45,226 | $1,039,745 | |
| SO | Southern Co | +4,945 | 66,734 | $5,531,581 | |
| ALNY | Alnylam Pharmaceuticals, Inc. | +3,621 | 28,637 | $7,065,893 | |
| HPE | Hewlett Packard Enterprise Co | +1,995 | 8,723 | $557,312 | |
| AEIS | Advanced Energy Industries Inc | +1,935 | 3,175 | $894,778 | |
| No positions match the current search. | |||||
Trimmed
Positions the filer reduced| Ticker | Company | Δ Shares | Shares | Value | Open |
|---|---|---|---|---|---|
| PPLC | PPL Corp | −670,000 | 60,000 | $2,700,600 | |
| NEE | Nextera Energy Inc | −286,874 | 35,878 | $2,717,399 | |
| MCHPP | Microchip Technology Inc | −274,500 | 175,500 | $11,686,545 | |
| LCID | Lucid Group, Inc. | −208,802 | 16,252 | $66,145 | |
| NOVTU | Novanta Inc | −140,500 | 69,500 | $4,221,430 | |
| AKAM | Akamai Technologies Inc | −111,635 | 66,442 | $7,066,106 | |
| — | −75,000 | 100,000 | $0 | ||
| PPL | PPL Corp | −47,123 | 9,909 | $325,907 | |
| GLD | Spdr Gold Trust | −13,000 | 14,000 | $5,331,760 | |
| BABA | Alibaba Group Holding Ltd | −12,096 | 683,622 | $73,516,709 | |
| STX | Seagate Technology Holdings plc | −4,081 | 21,086 | $19,448,461 | |
| No positions match the current search. | |||||
New Positions
Positions the filer opened this quarter| Ticker | Company | Shares | Value | Open |
|---|---|---|---|---|
| NET | Cloudflare, Inc. | 75,939 | $26,372,095 | |
| MP | MP Materials Corp. | 301,468 | $14,256,421 | |
| SOFI | SoFi Technologies, Inc. | 784,273 | $12,328,771 | |
| TLT | iShares 20+ Year Treasury Bond ETF | 90,000 | $7,000,200 | |
| FLR | Fluor Corp | 119,530 | $5,723,096 | |
| GOOGN | Alphabet Inc. | 100,000 | $4,849,000 | |
| ITRI | Itron, Inc. | 9,813 | $847,254 | |
| — | 30,000 | $0 | ||
| No positions match the current search. | ||||
Sold Out
Positions the filer fully exited| Ticker | Company | Shares | Value | Open |
|---|---|---|---|---|
| SOMN | Southern Co | 1,236,000 | $61,478,640 | |
| ORCL | Oracle Corp | 58,020 | $8,502,831 | |
| WDC | Western Digital Corp | 10,430 | $6,661,849 | |
| PCG | PG&E Corp | 230,773 | $3,881,601 | |
| ZTO | ZTO Express (Cayman) Inc. | 71,243 | $1,594,418 | |
| STWD | Starwood Property Trust, Inc. | 81,810 | $1,340,047 | |
| XRX | Xerox Holdings Corp | 16,807 | $52,605 | |
| No positions match the current search. | ||||
| Ticker | Company | Type | Shares | Value (USD) | % of Portfolio | History |
|---|---|---|---|---|---|---|
| BABA |
Alibaba Group Holding Ltd
PUT
+ SHARES
Consumer Cyclical
|
Added | 2,249,822 | $241,945,857 | 14.42% | |
| IREN |
IREN Ltd
PUT
Financial Services
|
Added | 4,772,000 | $195,079,360 | 11.63% | |
| W |
Wayfair Inc.
PUT
+ SHARES
Consumer Cyclical
|
Added | 1,734,251 | $177,864,782 | 10.60% | |
| RDDT |
Reddit, Inc.
PUT
+ SHARES
Communication Services
|
Added | 1,098,073 | $156,409,518 | 9.32% | |
| SMTC |
Semtech Corp
PUT
Technology
|
Added | 756,400 | $134,903,940 | 8.04% | |
| NET |
Cloudflare, Inc.
PUT
+ SHARES
Technology
|
Added | 189,039 | $65,649,463 | 3.91% | |
| GLD |
Spdr Gold Trust
CALL
+ SHARES
|
Reduced | 134,000 | $51,032,560 | 3.04% | |
| AKAM |
Akamai Technologies Inc
PUT
+ SHARES
Technology
|
Reduced | 447,042 | $47,542,916 | 2.83% | |
| ALB |
Albemarle Corp
PUT
+ SHARES
Basic Materials
|
Added | 423,293 | $44,775,933 | 2.67% | |
| LYV |
Live Nation Entertainment, Inc.
PUT
Communication Services
|
Added | 213,000 | $36,060,900 | 2.15% | |
| ON |
On Semiconductor Corp
PUT
+ SHARES
Technology
|
Added | 439,788 | $33,806,503 | 2.02% | |
| TTEK |
Tetra Tech Inc
PUT
+ SHARES
Industrials
|
Reduced | 747,058 | $24,615,561 | 1.47% | |
| MCHP |
Microchip Technology Inc
PUT
Technology
|
Reduced | 316,500 | $24,614,205 | 1.47% | |
| GPN |
Global Payments Inc
PUT
CALL
Industrials
|
Reduced | 299,700 | $24,476,499 | 1.46% | |
| PCG |
PG&E Corp
PUT
Utilities
|
Reduced | 1,913,000 | $23,434,250 | 1.40% | |
| BA |
Boeing Co
PUT
Industrials
|
NEW | 125,200 | $23,293,460 | 1.39% | |
| FLR |
Fluor Corp
PUT
+ SHARES
Industrials
|
Added | 458,930 | $21,973,568 | 1.31% | |
| ALNY |
Alnylam Pharmaceuticals, Inc.
PUT
+ SHARES
Healthcare
|
Added | 88,337 | $21,796,271 | 1.30% | |
| MP |
MP Materials Corp.
PUT
+ SHARES
Basic Materials
|
NEW | 424,568 | $20,077,820 | 1.20% | |
| SOFI |
SoFi Technologies, Inc.
PUT
+ SHARES
Financial Services
|
NEW | 1,241,873 | $19,522,243 | 1.16% | |
| STX |
Seagate Technology Holdings plc
Technology
|
Reduced | 21,086 | $19,448,461 | 1.16% | |
| GOOG |
Alphabet Inc.
PUT
Communication Services
|
NEW | 57,000 | $19,422,180 | 1.16% | |
| SO |
Southern Co
PUT
+ SHARES
Utilities
|
Reduced | 233,834 | $19,382,500 | 1.16% | |
| FE |
Firstenergy Corp
PUT
Utilities
|
Reduced | 407,100 | $17,639,643 | 1.05% | |
| NEE |
Nextera Energy Inc
PUT
+ SHARES
Utilities
|
Reduced | 232,278 | $17,592,735 | 1.05% | |
| GH |
Guardant Health, Inc.
PUT
Healthcare
|
Held | 94,800 | $16,908,528 | 1.01% | |
| ITRI |
Itron, Inc.
PUT
+ SHARES
Technology
|
Added | 189,513 | $16,362,552 | 0.98% | |
| TLT |
iShares 20+ Year Treasury Bond ETF
PUT
+ SHARES
|
Added | 165,000 | $12,833,700 | 0.77% | |
| WGO |
Winnebago Industries Inc
CALL
Consumer Cyclical
|
Reduced | 451,000 | $11,892,870 | 0.71% | |
| MCHPP |
Microchip Technology Inc
Technology
|
Reduced | 175,500 | $11,686,545 | 0.70% | |
| ENOV |
Enovis CORP
CALL
Healthcare
|
Reduced | 553,000 | $10,103,310 | 0.60% | |
| COMP |
Compass, Inc.
PUT
Real Estate
|
NEW | 1,100,000 | $9,768,000 | 0.58% | |
| USO |
United States Oil Fund, LP
PUT
|
Reduced | 66,200 | $9,642,692 | 0.57% | |
| TYL |
Tyler Technologies Inc
PUT
Technology
|
NEW | 29,800 | $9,494,280 | 0.57% | |
| RIVN |
Rivian Automotive, Inc.
PUT
Consumer Cyclical
|
NEW | 630,000 | $9,412,200 | 0.56% | |
| CRWV |
CoreWeave, Inc.
PUT
Technology
|
NEW | 90,000 | $7,840,800 | 0.47% | |
| O |
Realty Income Corp
PUT
Real Estate
|
Held | 142,200 | $7,721,460 | 0.46% | |
| FXI |
iShares China Large-Cap ETF
CALL
+ SHARES
|
Reduced | 217,200 | $7,389,144 | 0.44% | |
| SPB |
Spectrum Brands Holdings, Inc.
PUT
Consumer Defensive
|
Reduced | 90,100 | $7,163,851 | 0.43% | |
| BL |
Blackline, Inc.
PUT
Technology
|
Reduced | 268,100 | $7,112,693 | 0.42% | |
| SYNA |
SYNAPTICS Inc
PUT
Technology
|
Reduced | 56,200 | $5,698,399 | 0.34% | |
| ZTO |
ZTO Express (Cayman) Inc.
PUT
Industrials
|
Reduced | 280,100 | $5,439,542 | 0.32% | |
| LCID |
Lucid Group, Inc.
PUT
+ SHARES
Consumer Cyclical
|
Added | 1,265,352 | $5,149,982 | 0.31% | |
| GOOGN |
Alphabet Inc.
Communication Services
|
NEW | 100,000 | $4,849,000 | 0.29% | |
| NOVTU |
Novanta Inc
Technology
|
Reduced | 69,500 | $4,221,430 | 0.25% | |
| PPL |
PPL Corp
PUT
+ SHARES
Utilities
|
Reduced | 94,309 | $3,101,823 | 0.18% | |
| PPLC |
PPL Corp
Utilities
|
Reduced | 60,000 | $2,700,600 | 0.16% | |
| HPE |
Hewlett Packard Enterprise Co
PUT
+ SHARES
Technology
|
Reduced | 37,223 | $2,378,177 | 0.14% | |
| EVRG |
Evergy, Inc.
PUT
Utilities
|
Reduced | 30,300 | $2,376,732 | 0.14% | |
| NOVT |
Novanta Inc
PUT
Technology
|
Reduced | 9,600 | $1,365,024 | 0.08% |
Showing the top 50 of 56 positions. Create a free account to see every position, past quarters, search, filters and CSV export.
Covers the securities this platform tracks: U.S.-listed common stock and the put/call positions reported on it. A 13F can also report security types outside that coverage — preferred shares, bonds, warrants, untracked share classes — so the filing's own declared total can exceed the figures above. The source filing is linked at the top of this table.