Simplex Trading Portfolio holdings
Simplex Trading, founded in 2004 and headquartered in Chicago, Illinois, is a technology-driven proprietary trading firm specializing in market-making and liquidity provision, primarily in U.S. equity options and futures options. Leveraging advanced proprietary software and data-driven analysis, the firm optimizes trading strategies and develops innovative solutions to capitalize on financial market opportunities, maintaining a competitive edge through automation and a collaborative team of technologists and traders. With a workforce exceeding 300 and led by CEO Erik Swanson since 2014, Simplex operates with a low-ego, high-intelligence culture, focusing on minimal bureaucracy and rapid execution, while also making strategic venture capital investments in fintech startups. Recognized as a top workplace in Chicago by Built In’s 2025 awards, Simplex continues to evolve, blending cutting-edge technology with a commitment to market efficiency and growth.
Top Buys
| 1 |
Goldman Sachs
GS
|
+$38.4M |
| 2 |
Micron Technology
MU
|
+$23.7M |
| 3 |
NVIDIA
NVDA
|
+$23.6M |
| 4 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$21.7M |
| 5 |
Wells Fargo
WFC
|
+$20.4M |
Top Sells
| 1 |
Citigroup
C
|
+$21.6M |
| 2 |
Apple
AAPL
|
+$17.2M |
| 3 |
Invesco QQQ Trust
QQQ
|
+$13.3M |
| 4 |
Eli Lilly
LLY
|
+$9.69M |
| 5 |
Mastercard
MA
|
+$8.27M |
Sector Composition
| 1 | Technology | 14.2% |
| 2 | Communication Services | 13.46% |
| 3 | Consumer Discretionary | 12.76% |
| 4 | Healthcare | 12.43% |
| 5 | Financials | 10.75% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
326
Invesco CurrencyShares British Pound Sterling Trust
FXB
$91.2M
| $757K | 0.03% |
6,200
-405
| -6% | -$49.4K |
|
327
Pitney Bowes
PBI
$2B
| $754K | 0.03% |
+57,535
| New | +$754K |
|
328
Public Service Enterprise Group
PEG
$40.5B
| $754K | 0.03% |
+17,007
| New | +$754K |
|
329
InterDigital
IDCC
$8.75B
| $752K | 0.03% |
8,718
-6,641
| -43% | -$573K |
|
|
TERP
330
DELISTED
TerraForm Power, Inc
TERP
| $750K | 0.03% |
60,671
+13,055
| +27% | +$161K |
|
331
Methanex
MEOH
$3.06B
| $744K | 0.03% |
15,865
+10,446
| +193% | +$490K |
|
|
SRCL
332
DELISTED
Stericycle Inc
SRCL
| $743K | 0.03% |
8,964
-43
| -0.5% | -$3.56K |
|
333
Immersion
IMMR
$239M
| $735K | 0.03% |
84,900
+43,076
| +103% | +$373K |
|
334
RenaissanceRe
RNR
$11.4B
| $732K | 0.03% |
+5,065
| New | +$732K |
|
335
Service Corp International
SCI
$11.3B
| $731K | 0.03% |
+23,683
| New | +$731K |
|
|
LN
336
DELISTED
LINE Corporation
LN
| $731K | 0.03% |
19,007
-1,587
| -8% | -$61K |
|
337
Popular Inc
BPOP
$8.64B
| $718K | 0.03% |
+17,632
| New | +$718K |
|
338
S&P Global
SPGI
$155B
| $714K | 0.03% |
5,464
-2,228
| -29% | -$291K |
|
|
WWE
339
DELISTED
World Wrestling Entertainment
WWE
| $710K | 0.03% |
31,958
+27,438
| +607% | +$610K |
|
|
HRG
340
DELISTED
HRG Group, Inc.
HRG
| $708K | 0.03% |
36,667
+7,887
| +27% | +$152K |
|
341
SITE Centers
SITC
$467M
| $707K | 0.03% |
43,812
+36,932
| +537% | +$596K |
|
342
iShares Russell Mid-Cap Value ETF
IWS
$14.2B
| $706K | 0.03% |
8,515
+2,945
| +53% | +$244K |
|
343
iShares US Home Construction ETF
ITB
$3.32B
| $703K | 0.03% |
21,997
-1,238
| -5% | -$39.6K |
|
|
XIFR
344
XPLR Infrastructure, LP
XIFR
$947M
| $702K | 0.03% |
21,193
+17,697
| +506% | +$586K |
|
345
Digital Realty Trust
DLR
$58.4B
| $701K | 0.03% |
6,591
-5,116
| -44% | -$544K |
|
346
JB Hunt Transport Services
JBHT
$13.1B
| $698K | 0.03% |
+7,612
| New | +$698K |
|
|
P
347
DELISTED
Pandora Media Inc
P
| $698K | 0.03% |
59,151
+1,998
| +3% | +$23.6K |
|
|
WWAV
348
DELISTED
The WhiteWave Foods Company
WWAV
| $698K | 0.03% |
12,447
+10,535
| +551% | +$591K |
|
349
Invesco Senior Loan ETF
BKLN
$6.81B
| $697K | 0.03% |
+30,000
| New | +$697K |
|
350
OFG Bancorp
OFG
$2B
| $694K | 0.03% |
+58,837
| New | +$694K |
|