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 |
Alibaba
BABA
|
$48.9M |
| 2 |
Boeing
BA
|
$25.8M |
| 3 |
SPDR Gold Trust
GLD
|
$18.2M |
| 4 |
Biogen
BIIB
|
$15.8M |
| 5 |
FedEx
FDX
|
$13.6M |
Top Sells
| 1 |
Alphabet (Google) Class C
GOOG
|
$62.1M |
| 2 |
iShares Russell 2000 ETF
IWM
|
$36.4M |
| 3 |
Industrial Select Sector SPDR Fund
XLI
|
$17.5M |
| 4 |
Netflix
NFLX
|
$16.3M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
$14.6M |
Sector Composition
| 1 | Consumer Discretionary | 16.74% |
| 2 | Technology | 16.32% |
| 3 | Healthcare | 12.17% |
| 4 | Industrials | 12.14% |
| 5 | Communication Services | 7.05% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
|
CADE
226
DELISTED
Cadence Bancorporation
CADE
| $994K | ﹤0.01% |
56,726
-50,621
| -47% | -$887K |
|
227
Penumbra
PEN
$11B
| $992K | ﹤0.01% |
7,383
+3,017
| +69% | +$405K |
|
228
TransUnion
TRU
$17.5B
| $992K | ﹤0.01% |
+12,231
| New | +$992K |
|
229
Direxion Daily MSCI Brazil Bull 2X Shares
BRZU
$133M
| $991K | ﹤0.01% |
1,033
-67
| -6% | -$64.3K |
|
230
Direxion Daily Gold Miners Index Bear 2X Shares
DUST
$62.9M
| $990K | ﹤0.01% |
+481
| New | +$990K |
|
231
Direxion Daily Semiconductor Bull 3X Shares
SOXL
$11.4B
| $987K | ﹤0.01% |
87,045
-112,500
| -56% | -$1.28M |
|
|
AXE
232
DELISTED
Anixter International Inc
AXE
| $985K | ﹤0.01% |
+14,263
| New | +$985K |
|
233
Newmont
NEM
$83.7B
| $984K | ﹤0.01% |
25,951
-20,963
| -45% | -$795K |
|
234
Union Pacific
UNP
$131B
| $983K | ﹤0.01% |
+6,073
| New | +$983K |
|
|
CLDR
235
DELISTED
Cloudera, Inc.
CLDR
| $973K | ﹤0.01% |
109,841
-133,394
| -55% | -$1.18M |
|
236
Ionis Pharmaceuticals
IONS
$9.76B
| $972K | ﹤0.01% |
16,235
-6,948
| -30% | -$416K |
|
237
Middleby
MIDD
$7.32B
| $958K | ﹤0.01% |
+8,197
| New | +$958K |
|
238
Petrobras
PBR
$78.7B
| $947K | ﹤0.01% |
65,464
-109,164
| -63% | -$1.58M |
|
239
Radware
RDWR
$1.07B
| $944K | ﹤0.01% |
38,936
-32,784
| -46% | -$795K |
|
|
SGI
240
Somnigroup International Inc.
SGI
$18.3B
| $942K | ﹤0.01% |
+48,824
| New | +$942K |
|
241
Extra Space Storage
EXR
$31.3B
| $936K | ﹤0.01% |
+8,019
| New | +$936K |
|
242
iShares MSCI EAFE Min Vol Factor ETF
EFAV
$5.42B
| $932K | ﹤0.01% |
12,727
+8,470
| +199% | +$620K |
|
|
HUYA
243
Huya Inc
HUYA
$796M
| $929K | ﹤0.01% |
39,316
-908
| -2% | -$21.5K |
|
244
iRhythm Technologies
IRTC
$5.82B
| $926K | ﹤0.01% |
12,503
+12,196
| +3,973% | +$903K |
|
245
NCR Voyix
VYX
$1.84B
| $926K | ﹤0.01% |
47,860
+36,443
| +319% | +$705K |
|
246
Core Laboratories
CLB
$592M
| $925K | ﹤0.01% |
19,857
+12,303
| +163% | +$573K |
|
|
TEN
247
DELISTED
Tenneco Inc. Class A Voting Common Stock
TEN
| $925K | ﹤0.01% |
73,906
+29,587
| +67% | +$370K |
|
248
Molina Healthcare
MOH
$9.47B
| $923K | ﹤0.01% |
+8,414
| New | +$923K |
|
249
Honeywell
HON
$136B
| $922K | ﹤0.01% |
+5,454
| New | +$922K |
|
250
Moderna
MRNA
$9.78B
| $922K | ﹤0.01% |
57,951
+10,813
| +23% | +$172K |
|