Top Institutional Investors

THAMES CAPITAL MANAGEMENT LLC — 13F Holdings & Portfolio

CIK 1714267 · latest 13F-HR filed 2026-08-12

Backtest portfolio

THAMES CAPITAL MANAGEMENT LLC manages $1.22B in 13F-reported U.S. long-equity assets across 56 reported positions as of its 2026-06-30 13F-HR filing. Its largest disclosed positions are STT (4.71%), GE (4.50%), MU (4.31%). Quarter over quarter (versus its 2026-03-31 filing) the fund opened 24 new positions and exited 11; 23 existing positions rose in reported value and 4 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
$1.22B

Long-equity book

Holdings
56

Distinct positions

Period
2026-06-30

Filed 2026-08-12

Q/Q Activity
+24 / −11 / ↑23 / ↓4

vs 2026-03-31

Portfolio charts

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

Portfolio map

Q2 26
STT4.7% · +148%GE4.5% · +136%MU4.3% · -10%GEV4.2% · -14%VRT3.4% · -26%HUT3.3% · -17%AMD3.2% · newTSM3.0% · +0%NBIS3.0% · newMKSI2.9% · +17%NOK2.8% · newSNDK2.8% · -35%RIOT2.7% · newINTC2.6% · newKLAC2.4% · newALAB2.3% · newWULF2.2% · +39%NTRS2.2% · newAEIS2.2% · +84%APH2.1% · -2%FLEX2.0% · newNVDA1.9% · 0%AVGO1.9% · newFPS1.8% · newC1.8% · newKEEL1.7% · newAMAT1.7% · newCOHR1.5% · -16%AAPL1.5% · 0%MA1.5% · 0%SIMO1.4% · +14%VRNS1.3% · newV1.3% · 0%AGX1.3% · -46%AMKR1.3% · newFN1.2% · -24%CIFR1.2% · newAIP1.2% · 0%PENG1.2% · newMETA1.1% · 0%BKD1.0% · 0%JBL1.0% · +255%APLD0.9% · newLRCX0.8% · newFIX0.7% · -55%STRL0.6% · -42%CLS0.6% · 0%LITE0.6% · -32%MTSI0.6% · 0%AMZN0.6% · newTMO0.5% · 0%CEPO0.4% · newIREN0.4% · -28%LSCC0.4% · newQS0.4% · +55%ADI0.3% · new

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

5 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 = 36.6%

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

Firm Profile & Key People

As of the firm’s regulatory filing dated Mar 27, 2026.

Assets Under Management
$830.5M
Discretionary
$830.5M
Employees
6
Accounts
3
Address
103 EISENHOWER PARKWAY
3RD FLOOR
ROSELAND, NJ 07068
Phone
(973) 200-6725
Website
Name Title / Status Ownership Type
GENZER, JAY, SCOTT ControlMANAGING MEMBER AND PORTFOLIO MANAGER
since Jun 2016
75% or moreIndividual
DIMARTINO, STEVEN, FRANKCHIEF COMPLIANCE OFFICER AND CHIEF FINANCIAL OFFICER
since Sep 2016
Less than 5%Individual
Ownership & leadership changes · 2 filings with changes since Aug 14, 2017

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 25, 2021 filing
  • No longer listedBERLIN, JARED, (NMN) · MEMBER · Less than 5% · listed since Sep 2016
  • No longer listedKOUTSOURAKIS, DEMETRIOS, (NMN) · MEMBER · Less than 5% · listed since Sep 2016
Mar 27, 2018 filing
  • ChangedBERLIN, JARED, (NMN) · title MANAGING MEMBER → MEMBER
  • ChangedKOUTSOURAKIS, DEMETRIOS, (NMN) · title MANAGING MEMBER → MEMBER
Aug 14, 2017 filing (earliest on record)
  • ListedBERLIN, JARED, (NMN) · MANAGING MEMBER · Less than 5%
  • ListedDIMARTINO, STEVEN, FRANK · CHIEF COMPLIANCE OFFICER AND CHIEF FINANCIAL OFFICER · Less than 5%
  • ListedGENZER, JAY, SCOTT · MANAGING MEMBER AND PORTFOLIO MANAGER · 75% or more · control person
  • ListedKOUTSOURAKIS, DEMETRIOS, (NMN) · MANAGING MEMBER · Less than 5%

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 23 →

Top Trims

Show all 4 →

New Positions

Show all 24 →

Exited Positions

Show all 11 →

THAMES 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 STATE STR CORP STT 857477103 $57.2M 4.71% 337,558 SH
2 GE AEROSPACE GE 369604301 $54.7M 4.50% 146,383 SH
3 MICRON TECHNOLOGY INC MU 595112103 $52.4M 4.31% 45,388 SH
4 GE VERNOVA INC GEV 36828A101 $50.9M 4.19% 43,318 SH
5 VERTIV HOLDINGS CO VRT 92537N108 $40.9M 3.37% 122,240 SH
6 HUT 8 CORP HUT 44812J104 $40.6M 3.34% 351,973 SH
7 ADVANCED MICRO DEVICES INC AMD 007903107 $38.9M 3.20% 66,972 SH
8 TAIWAN SEMICONDUCTOR MANUFAC TSM 874039100 $36.8M 3.02% 77,008 SH
9 NEBIUS GROUP N.V. NBIS N97284108 $36.7M 3.02% 132,768 SH
10 MKS INC. MKSI 55306N104 $35.3M 2.90% 79,395 SH
11 NOKIA CORP NOK 654902204 $33.9M 2.79% 2,550,584 SH
12 SANDISK CORP SNDK 80004C200 $33.7M 2.77% 14,808 SH
13 RIOT PLATFORMS INC RIOT 767292105 $32.9M 2.71% 1,201,609 SH
14 INTEL CORP INTC 458140100 $31.2M 2.57% 223,725 SH
15 KLA CORP KLAC 482480100 $28.6M 2.35% 94,720 SH
16 ASTERA LABS INC ALAB 04626A103 $27.9M 2.29% 57,733 SH
17 TERAWULF INC WULF 88080T104 $26.9M 2.21% 1,090,203 SH
18 NORTHERN TR CORP NTRS 665859104 $26.2M 2.15% 150,619 SH
19 ADVANCED ENERGY INDS AEIS 007973100 $26.2M 2.15% 70,220 SH
20 AMPHENOL CORP APH 032095101 $25.1M 2.06% 142,139 SH
21 FLEX LTD FLEX Y2573F102 $24.2M 1.99% 149,474 SH
22 NVIDIA CORPORATION NVDA 67066G104 $23.2M 1.91% 116,169 SH
23 BROADCOM INC AVGO 11135F101 $22.8M 1.88% 60,391 SH
24 FORGENT POWER SOLUTIONS INC FPS 34631F102 $22.3M 1.83% 398,912 SH
25 CITIGROUP INC C 172967424 $21.4M 1.76% 153,039 SH
26 KEEL INFRASTRUCTURE CORP KEEL 486917107 $20.8M 1.71% 3,622,886 SH
27 APPLIED MATLS INC AMAT 038222105 $20.3M 1.67% 28,138 SH
28 COHERENT CORP COHR 19247G107 $18.1M 1.49% 45,883 SH
29 APPLE INC AAPL 037833100 $17.9M 1.47% 61,806 SH
30 MASTERCARD INCORPORATED MA 57636Q104 $17.8M 1.46% 34,663 SH
31 SILICON MOTION TECHNOLOGY CO SIMO 82706C108 $17.6M 1.45% 52,823 SH
32 VARONIS SYS INC VRNS 922280102 $16.0M 1.32% 381,281 SH
33 VISA INC V 92826C839 $15.7M 1.29% 45,662 SH
34 ARGAN INC AGX 04010E109 $15.6M 1.28% 19,514 SH
35 AMKOR TECHNOLOGY INC AMKR 031652100 $15.3M 1.26% 177,301 SH
36 FABRINET FN G3323L100 $14.7M 1.21% 26,114 SH
37 CIPHER DIGITAL INC CIFR 17253J106 $14.6M 1.20% 595,538 SH
38 ARTERIS INC AIP 04302A104 $14.3M 1.17% 293,973 SH
39 PENGUIN SOLUTIONS INC PENG 706915105 $14.1M 1.16% 185,128 SH
40 META PLATFORMS INC META 30303M102 $14.0M 1.15% 24,794 SH
41 BROOKDALE SR LIVING INC BKD 112463104 $12.2M 1.00% 757,710 SH
42 JABIL INC JBL 466313103 $12.1M 1.00% 31,457 SH
43 APPLIED DIGITAL CORP APLD 038169207 $10.7M 0.88% 288,167 SH
44 LAM RESEARCH CORP LRCX 512807306 $9.7M 0.80% 22,365 SH
45 COMFORT SYS USA INC FIX 199908104 $9.0M 0.74% 4,561 SH
46 STERLING INFRASTRUCTURE INC STRL 859241101 $7.6M 0.62% 9,002 SH
47 CELESTICA INC CLS 15101Q207 $7.2M 0.59% 19,655 SH
48 LUMENTUM HLDGS INC LITE 55024U109 $7.1M 0.59% 8,324 SH
49 MACOM TECH SOLUTIONS HLDGS I MTSI 55405Y100 $6.8M 0.56% 17,960 SH
50 AMAZON COM INC AMZN 023135106 $6.7M 0.55% 28,290 SH
Filing History
Period Filed AUM Holdings Accession
2026-06-30 2026-08-12 $1.22B 56 0001714267-26-000003
2026-03-31 2026-05-12 $557.9M 43 0001714267-26-000002
2025-12-31 2026-02-10 $687.8M 48 0001714267-26-000001
2025-09-30 2025-10-28 $700.8M 58 0001714267-25-000009
2022-03-31 2022-05-11 $474.1M 44 0001714267-22-000005
Filer Information
Address
103 EISENHOWER PARKWAY
3RD FLOOR
ROSELAND, NJ 07068
Phone
(973) 200-6725
Filing Manager
THAMES CAPITAL MANAGEMENT LLC
Roseland, NJ
Signatory
Steven DiMartino
Chief Financial Officer