Q2 2026 13F · SEC CIK 2111996

Sunstone Asset Management, LP

Hedge fundFiled 2026-08-14 for Q2 2026. Open the filing ↗ · All SEC filings ↗

Reported 13F value: $92.4M
Reported positions: 57
Holdings vs S&P 500, 3 yrs: —
Assets under management: $220.2M

Sunstone Asset Management, LP is a hedge fund that reported 57 positions worth $92.4M in its Q2 2026 13F, filed 2026-08-14. Its largest holdings were Applied Matls Inc (AMAT, 5.9%), Mks Inc. (MKSI, 5.6%), Macom Tech Solutions Hldgs I (MTSI, 4.8%).

Sunstone Asset Management, LP holdings largest 50 of 57 positions.

Weights are shares of the filer's total reported 13F value, compared with Q1 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.

Sunstone Asset Management, LP 13F holdings
Stock	% of 13F value	Q1 2026	Shares	Share change	Reported value
AMATApplied Matls Inc	5.9%	3.4%	7,580	+1.1%	$5.5M
MKSIMks Inc.	5.6%	New	11,600	—	$5.2M
MTSIMacom Tech Solutions Hldgs I	4.8%	4.2%	11,661	-18.2%	$4.4M
GLWCorning Inc	4.7%	2.7%	17,052	+12.4%	$4.4M
DASHDoordash Inc	4.6%	3.1%	22,900	+45.9%	$4.2M
090043AF7Bill Holdings Inc	4.4%	New	4,660,000	—	$4.0M
SNPSSynopsys Inc	3.9%	3.9%	8,150	+9.7%	$3.6M
ASMLAsml Hldg NV	3.7%	New	1,700	—	$3.4M
SNOWSnowflake Inc	3.3%	1.4%	12,000	+66.7%	$3.1M
GSATGlobalstar Inc	2.9%	New	33,500	—	$2.7M
TDSTelephone & Data Sys Inc	2.8%	3.9%	70,604	+0.0%	$2.6M
APHAmphenol Corp	2.8%	2.4%	14,500	+0.0%	$2.6M
SESea Ltd	2.7%	1.5%	26,214	+92.6%	$2.5M
VVisa Inc	2.7%	2.9%	7,300	+0.0%	$2.5M
AMZNAmazon Com Inc	2.7%	New	10,300	—	$2.5M
ADIAnalog Devices Inc	2.6%	1.0%	6,000	+150.0%	$2.4M
91332UAB7Unity Software Inc	2.1%	New	2,000,000	—	$2.0M
ANETArista Networks Inc	1.9%	New	10,400	—	$1.8M
EQIXEquinix Inc	1.9%	2.7%	1,645	-21.1%	$1.7M
NTNXNutanix Inc	1.8%	1.6%	32,890	+0.0%	$1.7M
AMTAmerican Tower Corp	1.8%	2.3%	9,914	+0.0%	$1.6M
ORCLOracle Corp	1.7%	1.1%	10,500	+90.9%	$1.5M
CIENCiena Corp	1.6%	New	3,040	—	$1.5M
STXSeagate Technology Hldngs Pl	1.5%	New	1,480	—	$1.4M
86800UAB0Super Micro Computer Inc	1.5%	New	1,500,000	—	$1.4M
60937P906Mongodb Inc	1.5%	New	20,000	—	$1.4M
MRSHMarsh & Mclennan Cos	1.4%	3.0%	7,932	-39.6%	$1.3M
YYJOYY Inc	1.3%	1.4%	18,705	+0.0%	$1.2M
TERTeradyne Inc	1.2%	New	2,320	—	$1.1M
NOWServicenow Inc	1.2%	1.1%	11,230	+39.9%	$1.1M
KLACKla Corp	1.2%	1.9%	3,540	+268.8%	$1.1M
TWLOTwilio Inc	1.2%	1.9%	5,166	-55.3%	$1.1M
TCOMTrip Com Group Ltd	1.1%	0.6%	26,300	+171.1%	$1.0M
SONYSony Group Corp	1.1%	1.4%	49,626	+0.0%	$995K
NETCloudflare Inc	1.1%	New	4,046	—	$994K
COHRCoherent Corp	1.0%	New	2,400	—	$947K
GLDSpdr Gold Tr	1.0%	1.5%	2,560	+0.0%	$943K
90138F902Twilio Inc	1.0%	New	15,000	—	$939K
18915M907Cloudflare Inc	1.0%	New	13,800	—	$898K
833445909Snowflake Inc	0.9%	New	10,000	—	$828K
SHOPShopify Inc	0.9%	1.1%	7,190	+0.0%	$821K
OLEDUniversal Display Corp	0.9%	1.1%	9,217	+0.0%	$798K
ABNBAirbnb Inc	0.8%	2.8%	5,000	-70.1%	$716K
SBACSba Communications Corp	0.8%	New	4,000	—	$706K
GWREGuidewire Software Inc	0.6%	New	4,400	—	$541K
03831W908Applovin Corp	0.5%	New	5,000	—	$481K
ESTCElastic N V	0.4%	0.4%	6,600	+0.0%	$376K
771049903Roblox Corp	0.4%	New	40,000	—	$364K
SSentinelone Inc	0.4%	0.3%	20,000	+0.0%	$339K
RBLXRoblox Corp	0.3%	1.1%	5,900	-59.9%	$321K

What Sunstone Asset Management, LP bought and sold in Q2 2026, against Q1 2026.

New positions

MKSI Mks Inc.5.6% of 13F
Bill Holdings Inc4.4% of 13F
ASML Asml Hldg NV3.7% of 13F
GSAT Globalstar Inc2.9% of 13F
AMZN Amazon Com Inc2.7% of 13F
Unity Software Inc2.1% of 13F
ANET Arista Networks Inc1.9% of 13F
CIEN Ciena Corp1.6% of 13F

Added to

KLAC Kla Corp+268.8% shares
TCOM Trip Com Group Ltd+171.1% shares
ADI Analog Devices Inc+150.0% shares
SE Sea Ltd+92.6% shares
ORCL Oracle Corp+90.9% shares
SNOW Snowflake Inc+66.7% shares
DASH Doordash Inc+45.9% shares
NOW Servicenow Inc+39.9% shares

Reduced

ABNB Airbnb Inc-70.1% shares
RBLX Roblox Corp-59.9% shares
TWLO Twilio Inc-55.3% shares
MRSH Marsh & Mclennan Cos-39.6% shares
EQIX Equinix Inc-21.1% shares
MTSI Macom Tech Solutions Hldgs I-18.2% shares

Left the top 50

Share counts compared with the Q1 2026 13F; a split also changes share counts. The latest filing lists more than 50 positions, so a position that left the top 50 may still be held.

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
Q2 2026	$92.4M	57
Q1 2026	$75.9M	50
Q4 2025	$61.9M	43

Questions about Sunstone Asset Management, LP's portfolio

What stocks does Sunstone Asset Management, LP own?

Sunstone Asset Management, LP's latest 13F, for Q2 2026 and filed Aug 14, 2026, lists 57 positions worth $92.4M. The largest are Applied Matls Inc (AMAT) at 5.9%, Mks Inc. (MKSI) at 5.6%, Macom Tech Solutions Hldgs I (MTSI) at 4.8%, Corning Inc (GLW) at 4.7% and Doordash Inc (DASH) at 4.6%.

What did Sunstone Asset Management, LP buy last quarter?

In Q2 2026, Sunstone Asset Management, LP added a new position in Mks Inc. (MKSI), a new position in Bill Holdings Inc, a new position in Asml Hldg NV (ASML), a new position in Globalstar Inc (GSAT), a new position in Amazon Com Inc (AMZN), Kla Corp (KLAC) (+268.8% shares), Trip Com Group Ltd (TCOM) (+171.1% shares) and Analog Devices Inc (ADI) (+150.0% shares), compared with its Q1 2026 filing.

What did Sunstone Asset Management, LP sell last quarter?

In Q2 2026, Sunstone Asset Management, LP cut from its top 50 Nvidia Corporation (NVDA), cut from its top 50 Mongodb Inc (MDB), cut from its top 50 Palo Alto Networks Inc (PANW), cut from its top 50 Advanced Micro Devices Inc (AMD), cut from its top 50 Microsoft Corp (MSFT), Airbnb Inc (ABNB) (-70.1% shares), Roblox Corp (RBLX) (-59.9% shares) and Twilio Inc (TWLO) (-55.3% shares), compared with its Q1 2026 filing.

When is Sunstone Asset Management, LP's next 13F filing due?

13F filings are due 45 days after each quarter ends. Sunstone Asset Management, LP's filing for the quarter ending Sep 30, 2026 is due by Nov 14, 2026; this page updates the day after it is published.

How much money does Sunstone Asset Management, LP manage?

Sunstone Asset Management, LP reported $220.2M of regulatory assets under management on its latest SEC Form ADV. Its 13F, which covers only US-listed stocks and options, totals $92.4M.