Top Institutional Investors

WESTERLY CAPITAL MANAGEMENT, LLC — 13F Holdings & Portfolio

CIK 1546172 · latest 13F-HR filed 2026-08-14

Backtest portfolio

WESTERLY CAPITAL MANAGEMENT, LLC manages $541.8M in 13F-reported U.S. long-equity assets across 46 reported positions as of its 2026-06-30 13F-HR filing. Its largest disclosed positions are QQQ (23.79%), COUR (6.33%), VIAV (5.07%). Quarter over quarter (versus its 2026-03-31 filing) the fund opened 16 new positions and exited 6; 11 existing positions rose in reported value and 16 fell.

AUM is the long-equity portion reported on Form 13F-HR. Excludes short positions, cash, foreign holdings, and non-13F assets. For informational purposes only — not investment advice.

Loading holdings…
AUM
$541.8M

Long-equity book

Holdings
46

Distinct positions

Period
2026-06-30

Filed 2026-08-14

Q/Q Activity
+16 / −6 / ↑11 / ↓16

vs 2026-03-31

Portfolio charts

Latest quarter's book, what changed, and how the portfolio has evolved across filings.

Portfolio map

Q2 26
QQQ23.8% · newCOUR6.3% · +258%VIAV5.1% · +35%ANET3.9% · newASAN3.9% · +138%HDSN3.6% · +6%HIPO3.4% · +29%ADBE2.8% · newFLR2.7% · +13%CRM2.7% · newENPH2.5% · -31%NOK2.5% · -44%CGNX2.3% · +36%NXDR2.0% · -12%LUMN2.0% · -36%SCOR1.8% · +46%NXT1.6% · newGWRE1.6% · newMTRX1.5% · -38%FRSH1.5% · -58%CALX1.4% · newAVEX1.3% · newAPH1.3% · newBL1.3% · -19%ORN1.3% · -6%ADTN1.3% · -38%AMBA1.3% · -38%CGNT1.2% · -39%CSCO1.2% · -76%RACE1.2% · newNVDA1.1% · newAADX1.1% · newTAC1.0% · -16%NFLX0.9% · newBE0.8% · -70%FIG0.8% · 0%SNOW0.7% · newFSLR0.7% · +50%ESTC0.5% · -67%GMTL0.5% · +19900%ANGI0.5% · -28%ARM0.3% · newAMPL0.3% · -60%HHS0.3% · +1%AVNW0.2% · newSPWR0.1% · +54%

Box size = position value; colour = change in share count vs the prior quarter (green added, red trimmed, blue new). Rows split across managers or share classes are combined. Click a box for the stock.

Sector mix

% of 13F value

Sectors from each company's SIC code; funds and ETFs grouped separately.

Biggest buys and sells

Q1 26 → Q2 26

Estimated from the change in shares held × the quarter-end price, so price moves alone don't count as buying. New and exited positions are included.

13F assets and positions

4 quarters

Total reported 13F value (bars) and number of positions (line) each quarter. Value changes include market moves.

Top positions over time

reported value

The eight largest current positions, valued at each quarter end.

Concentration

top 10 = 58.1%

Cumulative share of the portfolio held in the largest N positions.

Firm Profile & Key People

As of the firm’s regulatory filing dated Mar 31, 2026.

Assets Under Management
$488.9M
Discretionary
$488.9M
Employees
3
Accounts
3
Address
201 MISSION STREET, SUITE 580
SAN FRANCISCO, CA 94105
Phone
(415) 547-9000
Website
Name Title / Status Ownership Type
GALVIN, CHRISTOPHER, JAMES ControlMANAGING MEMBER
since Mar 2006
75% or moreIndividual
KAMPERIN, ANDERS, SUNE MATTI ControlCHIEF OPERATING OFFICER / CHIEF COMPLIANCE OFFICER
since Oct 2009
Less than 5%Individual
Ownership & leadership changes · 3 filings with changes since Apr 2, 2012

From the firm’s regulatory filings, newest first. Dates are filing dates: a filing that no longer lists someone does not say when they left.

Mar 29, 2023 filing
  • ChangedKAMPERIN, ANDERS, SUNE MATTI · title CHIEF COMPLIANCE OFFICER / CHIEF OPERATING OFFICER / CHIEF OPERATING OFFICER / CHIEF COMPLIANCE OFFICER → CHIEF OPERATING OFFICER / CHIEF COMPLIANCE OFFICER
Jun 30, 2022 filing
  • ChangedKAMPERIN, ANDERS, SUNE MATTI · title CHIEF OPERATING OFFICER → CHIEF COMPLIANCE OFFICER / CHIEF OPERATING OFFICER / CHIEF OPERATING OFFICER / CHIEF COMPLIANCE OFFICER; now a control person
Jan 19, 2016 filing
  • No longer listedTARANTINO, JAMES, W. · MANAGING MEMBER · 50–75% · control person · listed since Mar 2006
  • ChangedGALVIN, CHRISTOPHER, JAMES · ownership 50–75% → 75% or more
Apr 2, 2012 filing (earliest on record)
  • ListedGALVIN, CHRISTOPHER, JAMES · MANAGING MEMBER · 50–75% · control person
  • ListedKAMPERIN, ANDERS, SUNE MATTI · CHIEF OPERATING OFFICER · Less than 5%
  • ListedTARANTINO, JAMES, W. · MANAGING MEMBER · 50–75% · control person

Quarter-over-quarter changes

Changes in reported position value vs the prior 13F, so price moves count too, not just shares bought or sold.

Top Adds (vs prior quarter)

Show all 11 →

Top Trims

Show all 16 →

New Positions

Show all 16 →

Exited Positions

Show all 6 →

WESTERLY CAPITAL MANAGEMENT, LLC Holdings (2026-06-30)

Rows tagged Call or Put are options positions, not stock. Per SEC Form 13F-HR, Value shows the notional value of the underlying (shares covered × underlying price), not the option premium. Shares is the number of underlying shares covered (divide by 100 for contract count).

# Issuer Symbol CUSIP Value Weight Shares Type
1 INVESCO QQQ TRUST SERIES 1 P @ 680 AUG 26 QQQ 46090E953 $128.9M 23.79% 175,000 SH
2 COURSERA INC COUR 22266M104 $34.3M 6.33% 6,085,000 SH
3 VIAVI SOLUTIONS INC VIAV 925550105 $27.5M 5.07% 575,000 SH
4 ARISTA NETWORKS INC ANET 040413205 $21.2M 3.92% 125,000 SH
5 ASANA INC - CL A ASAN 04342Y104 $21.2M 3.91% 3,030,000 SH
6 HUDSON TECHNOLOGIES INC(NAS) HDSN 444144109 $19.4M 3.58% 3,380,000 SH
7 HIPPO HOLDINGS INC HIPO 433539202 $18.2M 3.36% 645,000 SH
8 ADOBE INC ADBE 00724F101 $15.0M 2.76% 73,000 SH
9 FLUOR CORP FLR 343412102 $14.8M 2.74% 283,000 SH
10 SALESFORCE INC CRM 79466L302 $14.4M 2.66% 92,000 SH
11 ENPHASE ENERGY INC(NMS) ENPH 29355A107 $13.5M 2.50% 275,000 SH
12 NOKIA CORP-SPON ADR NOK 654902204 $13.3M 2.45% 1,000,000 SH
13 COGNEX CORP(NSM) CGNX 192422103 $12.3M 2.27% 170,000 SH
14 NEXTDOOR HOLDINGS INC NXDR 65345M108 $11.0M 2.03% 4,850,000 SH
15 LUMEN TECHNOLOGIES INC LUMN 550241103 $10.8M 1.98% 1,400,000 SH
16 COMSCORE INC(NSM) SCOR 20564W204 $9.7M 1.79% 1,310,961 SH
17 NEXTPOWER INC-CL A NXT 65290E101 $8.9M 1.65% 75,000 SH
18 GUIDEWIRE SOFTWARE INC GWRE 40171V100 $8.6M 1.59% 70,000 SH
19 MATRIX SERVICE CO MTRX 576853105 $8.2M 1.51% 595,930 SH
20 FRESHWORKS INC-CL A FRSH 358054104 $8.1M 1.49% 800,000 SH
21 CALIX INC CALX 13100M509 $7.7M 1.41% 205,000 SH
22 AEVEX CORP-CL A AVEX 00835T107 $7.1M 1.31% 340,000 SH
23 AMPHENOL CORP-CL A(NYS) APH 032095101 $7.1M 1.30% 40,000 SH
24 BLACKLINE INC BL 09239B109 $7.0M 1.30% 250,000 SH
25 ORION GROUP HOLDINGS INC ORN 68628V308 $7.0M 1.29% 415,000 SH
26 ADTRAN HOLDINGS INC ADTN 00486H105 $7.0M 1.28% 500,000 SH
27 AMBARELLA INC(NSM) AMBA G037AX101 $6.9M 1.27% 80,000 SH
28 COGNYTE SOFTWARE LTD CGNT M25133105 $6.7M 1.23% 760,000 SH
29 CISCO SYSTEMS INC CSCO 17275R102 $6.5M 1.19% 55,000 SH
30 FERRARI NV RACE N3167Y103 $6.3M 1.17% 17,000 SH
31 NVIDIA CORP NVDA 67066G104 $6.0M 1.11% 30,000 SH
32 APPLIED AEROSPACE & DEFENSE AADX 03815J107 $5.7M 1.05% 250,000 SH
33 TRANSALTA CORP(NYS) TAC 89346D107 $5.5M 1.02% 400,000 SH
34 NETFLIX INC NFLX 64110L106 $5.0M 0.92% 70,000 SH
35 BLOOM ENERGY CORP- A BE 093712107 $4.5M 0.84% 15,000 SH
36 FIGMA INC-CL A FIG 316841105 $4.5M 0.83% 250,000 SH
37 SNOWFLAKE INC P @ 220 SEP 26 SNOW 833445959 $3.8M 0.70% 15,000 SH
38 FIRST SOLAR INC(NSM) FSLR 336433107 $3.5M 0.65% 15,000 SH
39 ELASTIC NV ESTC N14506104 $2.9M 0.53% 50,000 SH
40 GUARDIAN METAL RESOURCES GMTL 401382106 $2.8M 0.52% 200,000 SH
41 ANGI INC ANGI 00183L201 $2.6M 0.48% 440,921 SH
42 ARM HOLDINGS PLC P @ 300 AUG 26 ARM 042068955 $1.8M 0.33% 5,000 SH
43 AMPLITUDE INC-CLASS A AMPL 03213A104 $1.5M 0.28% 200,000 SH
44 HARTE-HANKS INC(NMS) HHS 416196202 $1.4M 0.25% 635,000 SH
45 AVIAT NETWORKS INC AVNW 05366Y201 $1.1M 0.20% 50,000 SH
46 SUNPOWER INC SPWR 20460L104 $687.3K 0.13% 1,000,000 SH
Filing History
Period Filed AUM Holdings Accession
2026-06-30 2026-08-14 $541.8M 46 0002073679-26-000089
2026-03-31 2026-05-15 $367.8M 37 0002073679-26-000057
2025-12-31 2026-02-17 $455.3M 41 0002073679-26-000027
2025-09-30 2025-11-14 $319.1M 44 0001546172-25-000011
Filer Information
Address
201 MISSION STREET
SUITE 580
SAN FRANCISCO, CA 94105
Phone
(415) 547-9000
Filing Manager
WESTERLY CAPITAL MANAGEMENT, LLC
SAN FRANCISCO, CA
Signatory
ANDERS KAMPERIN
CHIEF OPERATING OFFICER AND CHIEF COMPLIANCE OFFICER