Q3 2026 13F · SEC CIK 1966898

Portman Square Capital LLP

Hedge fundFiled 2026-10-15 for Q3 2026. Open the filing ↗ · All SEC filings ↗

Reported 13F value: $410.5M
Reported positions: 35
Holdings vs S&P 500, 3 yrs: —
Assets under management: $4.6B

Portman Square Capital LLP is a hedge fund that reported 35 positions worth $410.5M in its Q3 2026 13F, filed 2026-10-15. Its largest holdings were Wayfair Inc (W, 18.6%), Alibaba Group Hldg Ltd (BABA, 17.9%), Reddit Inc (RDDT, 16.6%).

Portman Square Capital LLP holdings all 35 positions.

Weights are shares of the filer's total reported 13F value, compared with Q2 2026. Share changes may reflect splits; weight changes also reflect price moves. A 13F shows long US-listed positions only, up to 135 days after the fact.

Portman Square Capital LLP 13F holdings
Stock	% of 13F value	Q2 2026	Shares	Share change	Reported value
WWayfair Inc	18.6%	7.2%	745,851	+82.2%	$76.5M
BABAAlibaba Group Hldg Ltd	17.9%	12.7%	683,622	-1.7%	$73.5M
RDDTReddit Inc	16.6%	10.3%	478,773	+52.5%	$68.2M
NETCloudflare Inc	6.4%	New	75,939	—	$26.4M
STXSeagate Technology Hldngs Pl	4.7%	4.6%	21,086	-16.2%	$19.4M
MPMp Materials Corp	3.5%	New	301,468	—	$14.3M
SOFISofi Technologies Inc	3.0%	New	784,273	—	$12.3M
69331C306Pg&e Corp	2.9%	3.0%	381,000	+0.0%	$12.0M
MCHPPMicrochip Technology Inc.	2.9%	6.6%	175,500	-61.0%	$11.7M
ONOn Semiconductor Corp	2.6%	0.6%	141,288	+302.9%	$10.9M
AKAMAkamai Technologies Inc	1.7%	4.0%	66,442	-62.7%	$7.1M
ALNYAlnylam Pharmaceuticals Inc	1.7%	1.4%	28,637	+14.5%	$7.1M
TLTIshares Tr	1.7%	New	90,000	—	$7.0M
097023204Boeing Co	1.4%	New	100,000	—	$5.9M
ALBAlbemarle Corp	1.4%	0.6%	55,493	+145.1%	$5.9M
FLRFluor Corp Com	1.4%	New	119,530	—	$5.7M
SOSouthern Co	1.3%	1.1%	66,734	+8.0%	$5.5M
TTEKTetra Tech Inc New	1.3%	0.6%	164,358	+44.9%	$5.4M
GLDSpdr Gold Tr	1.3%	1.9%	14,000	-48.1%	$5.3M
GOOGNAlphabet Inc	1.2%	New	100,000	—	$4.9M
NOVTUNovanta Inc	1.0%	2.7%	69,500	-66.9%	$4.2M
65339F655NextEra Energy 7.375 15-Feb-2029 PEPS	0.7%	3.7%	66,000	-83.9%	$2.8M
NEENextera Energy Inc	0.7%	5.4%	35,878	-88.9%	$2.7M
PPLCPpl Corp	0.7%	6.8%	60,000	-91.8%	$2.7M
KWEBKraneshares Trust	0.6%	0.8%	100,000	-42.9%	$2.5M
XLPSelect Sector Spdr Tr	0.6%	New	30,000	—	$2.4M
012653200Albemarle Corp	0.5%	5.7%	41,000	-92.4%	$1.9M
ARES-PAAres Management Corporation	0.4%	1.0%	40,250	-71.3%	$1.5M
UPSTUpstart Hldgs Inc	0.3%	0.1%	45,226	+137.6%	$1.0M
FXIIshares Tr	0.2%	0.2%	30,000	+0.0%	$1.0M
AEISAdvanced Energy Inds Inc	0.2%	0.1%	3,175	+156.0%	$895K
ITRIItron Inc	0.2%	New	9,813	—	$847K
HPEHewlett Packard Enterprise C	0.1%	0.1%	8,723	+29.7%	$557K
PPLPpl Corp	0.1%	0.4%	9,909	-82.6%	$326K
LCIDLucid Group Inc	0.0%	0.3%	16,252	-92.8%	$66K

What Portman Square Capital LLP bought and sold in Q3 2026, against Q2 2026.

New positions

NET Cloudflare Inc6.4% of 13F
MP Mp Materials Corp3.5% of 13F
SOFI Sofi Technologies Inc3.0% of 13F
TLT Ishares Tr1.7% of 13F
Boeing Co1.4% of 13F
FLR Fluor Corp Com1.4% of 13F
GOOGN Alphabet Inc1.2% of 13F
XLP Select Sector Spdr Tr0.6% of 13F

Added to

ON On Semiconductor Corp+302.9% shares
AEIS Advanced Energy Inds Inc+156.0% shares
ALB Albemarle Corp+145.1% shares
UPST Upstart Hldgs Inc+137.6% shares
W Wayfair Inc+82.2% shares
RDDT Reddit Inc+52.5% shares
TTEK Tetra Tech Inc New+44.9% shares
HPE Hewlett Packard Enterprise C+29.7% shares

Reduced

LCID Lucid Group Inc-92.8% shares
Albemarle Corp-92.4% shares
PPLC Ppl Corp-91.8% shares
NEE Nextera Energy Inc-88.9% shares
NextEra Energy 7.375 15-Feb-2029 PEPS-83.9% shares
PPL Ppl Corp-82.6% shares
ARES-PA Ares Management Corporation-71.3% shares
NOVTU Novanta Inc-66.9% shares

Sold out

SOMN Southern Cowas 11.7%
ORCL Oracle Corpwas 1.6%
WDC Western Digital Corp Comwas 1.3%
NEE-PQ Nextera Energy Incwas 1.0%
Hewlett Packard Enterprise Cwas 0.8%
PCG Pg&e Corpwas 0.7%
NEE-PQ Nextera Energy Incwas 0.5%
ZTO Zto Express Cayman Incwas 0.3%

Share counts compared with the Q2 2026 13F; a split also changes share counts.

How the holdings did against the S&P 500.

1 year: —
3 years: —
5 years: —

A portfolio of the filer's 20 largest 13F positions, weighted by value, bought the trading day after each 13F was filed and held until the next one was: what copying this filer could have earned. 13Fs show long US-listed positions only, so this is an estimate of the stock picks, not the fund's reported returns.

Reported 13F value by quarter.

13F value by quarter
Quarter	13F value	Positions
Q3 2026	$410.5M	35
Q2 2026	$527.2M	36
Q1 2026	$576.2M	39
Q4 2025	$350.6M	34
Q3 2025	$643.8M	27
Q2 2025	$629.1M	36
Q1 2025	$548.5M	52
Q4 2024	$373.3M	57
Q3 2024	$178.1M	75
Q2 2024	$128.3M	86
Q1 2024	$97.3M	83
Q4 2023	$201.1M	117

Questions about Portman Square Capital LLP's portfolio

What stocks does Portman Square Capital LLP own?

Portman Square Capital LLP's latest 13F, for Q3 2026 and filed Oct 15, 2026, lists 35 positions worth $410.5M. The largest are Wayfair Inc (W) at 18.6%, Alibaba Group Hldg Ltd (BABA) at 17.9%, Reddit Inc (RDDT) at 16.6%, Cloudflare Inc (NET) at 6.4% and Seagate Technology Hldngs Pl (STX) at 4.7%.

What did Portman Square Capital LLP buy last quarter?

In Q3 2026, Portman Square Capital LLP added a new position in Cloudflare Inc (NET), a new position in Mp Materials Corp (MP), a new position in Sofi Technologies Inc (SOFI), a new position in Ishares Tr (TLT), a new position in Boeing Co, On Semiconductor Corp (ON) (+302.9% shares), Advanced Energy Inds Inc (AEIS) (+156.0% shares) and Albemarle Corp (ALB) (+145.1% shares), compared with its Q2 2026 filing.

What did Portman Square Capital LLP sell last quarter?

In Q3 2026, Portman Square Capital LLP sold all of Southern Co (SOMN), sold all of Oracle Corp (ORCL), sold all of Western Digital Corp Com (WDC), sold all of Nextera Energy Inc (NEE-PQ), sold all of Hewlett Packard Enterprise C, Lucid Group Inc (LCID) (-92.8% shares), Albemarle Corp (-92.4% shares) and Ppl Corp (PPLC) (-91.8% shares), compared with its Q2 2026 filing.

When is Portman Square Capital LLP's next 13F filing due?

13F filings are due 45 days after each quarter ends. Portman Square Capital LLP's filing for the quarter ending Dec 31, 2026 is due by Feb 14, 2027; this page updates the day after it is published.

How much money does Portman Square Capital LLP manage?

Portman Square Capital LLP reported $4.6B of regulatory assets under management on its latest SEC Form ADV. Its 13F, which covers only US-listed stocks and options, totals $410.5M.