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 |
Tesla
TSLA
|
$27.1M |
| 2 |
Netflix
NFLX
|
$24.7M |
| 3 |
SPDR Dow Jones Industrial Average ETF Trust
DIA
|
$20.1M |
| 4 |
TWX
Time Warner Inc
TWX
|
$18.3M |
| 5 |
Alibaba
BABA
|
$14.8M |
Top Sells
| 1 |
Amazon
AMZN
|
$71.9M |
| 2 |
Micron Technology
MU
|
$47.7M |
| 3 |
Alphabet (Google) Class C
GOOG
|
$26.3M |
| 4 |
Boeing
BA
|
$21M |
| 5 |
Citigroup
C
|
$19.6M |
Sector Composition
| 1 | Consumer Discretionary | 15.64% |
| 2 | Communication Services | 14.16% |
| 3 | Technology | 12.46% |
| 4 | Financials | 10.94% |
| 5 | Healthcare | 10.33% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
276
Ionis Pharmaceuticals
IONS
$9.68B
| $753K | 0.03% |
17,087
-3,643
| -18% | -$161K |
|
277
Olin
OLN
$2.86B
| $745K | 0.03% |
24,538
+6,646
| +37% | +$202K |
|
|
WPZ
278
DELISTED
Williams Partners L.P.
WPZ
| $743K | 0.03% |
+21,607
| New | +$743K |
|
279
Clearwater Paper
CLW
$353M
| $742K | 0.03% |
18,986
+18,955
| +61,145% | +$741K |
|
280
ProShares UltraPro S&P 500
UPRO
$4.52B
| $739K | 0.03% |
33,960
-221,688
| -87% | -$4.82M |
|
281
Motorola Solutions
MSI
$79.6B
| $732K | 0.03% |
+6,956
| New | +$732K |
|
282
Pacira BioSciences
PCRX
$1.19B
| $723K | 0.03% |
23,213
+8,475
| +58% | +$264K |
|
283
CF Industries
CF
$13.6B
| $716K | 0.03% |
+18,995
| New | +$716K |
|
284
Pegasystems
PEGA
$9.8B
| $716K | 0.03% |
23,616
+20,164
| +584% | +$611K |
|
285
TSMC
TSM
$1.28T
| $716K | 0.03% |
+16,365
| New | +$716K |
|
286
United Parks & Resorts
PRKS
$2.94B
| $712K | 0.03% |
48,028
+38,000
| +379% | +$563K |
|
287
Lazard
LAZ
$5.3B
| $710K | 0.03% |
13,519
+13,377
| +9,420% | +$703K |
|
288
Direxion Daily 20+ Year Treasury Bear 3X Shares
TMV
$159M
| $706K | 0.03% |
+14,554
| New | +$706K |
|
|
NFX
289
DELISTED
Newfield Exploration
NFX
| $706K | 0.03% |
28,918
+19,488
| +207% | +$476K |
|
290
VanEck Gold Miners ETF
GDX
$20.2B
| $703K | 0.03% |
32,005
-65,971
| -67% | -$1.45M |
|
291
Exact Sciences
EXAS
$10.2B
| $694K | 0.03% |
17,227
+8,503
| +97% | +$343K |
|
292
Children's Place
PLCE
$142M
| $694K | 0.03% |
5,135
+2,793
| +119% | +$377K |
|
293
PENN Entertainment
PENN
$2.91B
| $689K | 0.03% |
26,268
+19,185
| +271% | +$503K |
|
|
ZGNX
294
DELISTED
Zogenix, Inc.
ZGNX
| $688K | 0.03% |
+17,181
| New | +$688K |
|
295
Delek US
DK
$1.84B
| $684K | 0.03% |
+16,819
| New | +$684K |
|
296
Industrial Select Sector SPDR Fund
XLI
$23.2B
| $682K | 0.03% |
+9,187
| New | +$682K |
|
|
JOBS
297
DELISTED
51job, Inc.
JOBS
| $681K | 0.03% |
7,917
-3,417
| -30% | -$294K |
|
|
XEC
298
DELISTED
CIMAREX ENERGY CO
XEC
| $677K | 0.03% |
7,247
+1,071
| +17% | +$100K |
|
299
Covenant Logistics
CVLG
$597M
| $673K | 0.03% |
45,160
+34,792
| +336% | +$518K |
|
300
Kennedy-Wilson Holdings
KW
$1.21B
| $673K | 0.03% |
38,713
+487
| +1% | +$8.47K |
|