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 |
Amazon
AMZN
|
$84.3M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
$37M |
| 3 |
Amgen
AMGN
|
$32.3M |
| 4 |
Micron Technology
MU
|
$29.4M |
| 5 |
Qualcomm
QCOM
|
$18M |
Top Sells
| 1 |
SPDR S&P 500 ETF Trust
SPY
|
$29.8M |
| 2 |
Gilead Sciences
GILD
|
$29.3M |
| 3 |
Goldman Sachs
GS
|
$27.7M |
| 4 |
Booking.com
BKNG
|
$26M |
| 5 |
AT&T
T
|
$20.8M |
Sector Composition
| 1 | Technology | 20.65% |
| 2 | Communication Services | 17.64% |
| 3 | Consumer Discretionary | 14.77% |
| 4 | Healthcare | 11.1% |
| 5 | Financials | 6.35% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
201
Ashland
ASH
$2.51B
| $1.09M | 0.05% |
+16,580
| New | +$1.09M |
|
202
Planet Fitness
PLNT
$8.77B
| $1.09M | 0.05% |
+46,633
| New | +$1.09M |
|
|
EGN
203
DELISTED
Energen
EGN
| $1.09M | 0.05% |
21,989
+18,682
| +565% | +$922K |
|
204
Gaming and Leisure Properties
GLPI
$13.7B
| $1.08M | 0.05% |
28,597
+21,913
| +328% | +$825K |
|
|
MXIM
205
DELISTED
Maxim Integrated Products
MXIM
| $1.07M | 0.05% |
+23,821
| New | +$1.07M |
|
206
Coty
COTY
$3.81B
| $1.06M | 0.05% |
+56,429
| New | +$1.06M |
|
|
LN
207
DELISTED
LINE Corporation
LN
| $1.06M | 0.05% |
30,367
+11,360
| +60% | +$395K |
|
|
MBLY
208
DELISTED
Mobileye N.V.
MBLY
| $1.05M | 0.05% |
16,754
-80,644
| -83% | -$5.06M |
|
|
PF
209
DELISTED
Pinnacle Foods, Inc.
PF
| $1.05M | 0.05% |
17,691
-10,078
| -36% | -$598K |
|
210
Aptiv
APTV
$17.5B
| $1.05M | 0.05% |
+11,955
| New | +$1.05M |
|
211
Anywhere Real Estate
HOUS
$724M
| $1.03M | 0.04% |
31,812
+10,534
| +50% | +$342K |
|
212
Diamondback Energy
FANG
$40.2B
| $1.03M | 0.04% |
11,563
+1,527
| +15% | +$135K |
|
|
TERP
213
DELISTED
TerraForm Power, Inc
TERP
| $1.01M | 0.04% |
84,205
+23,534
| +39% | +$282K |
|
|
CHL
214
DELISTED
China Mobile Limited
CHL
| $1.01M | 0.04% |
+18,966
| New | +$1.01M |
|
215
Evolent Health
EVH
$1.11B
| $998K | 0.04% |
39,374
-3,797
| -9% | -$96.2K |
|
|
COL
216
DELISTED
Rockwell Collins
COL
| $995K | 0.04% |
+9,478
| New | +$995K |
|
217
Take-Two Interactive
TTWO
$44.2B
| $991K | 0.04% |
13,506
-3,452
| -20% | -$253K |
|
218
United Therapeutics
UTHR
$18.1B
| $985K | 0.04% |
+7,593
| New | +$985K |
|
219
KraneShares CSI China Internet ETF
KWEB
$8.55B
| $976K | 0.04% |
+20,391
| New | +$976K |
|
220
Hormel Foods
HRL
$14.1B
| $968K | 0.04% |
28,389
+19,060
| +204% | +$650K |
|
221
iShares US Medical Devices ETF
IHI
$4.35B
| $965K | 0.04% |
+34,764
| New | +$965K |
|
222
Fabrinet
FN
$13.2B
| $963K | 0.04% |
22,578
+16,572
| +276% | +$707K |
|
223
Lumen
LUMN
$4.87B
| $962K | 0.04% |
+40,295
| New | +$962K |
|
224
Petrobras
PBR
$78.7B
| $958K | 0.04% |
119,924
-475,087
| -80% | -$3.8M |
|
|
AXDX
225
DELISTED
Accelerate Diagnostics
AXDX
| $956K | 0.04% |
+3,498
| New | +$956K |
|