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 |
Alphabet (Google) Class C
GOOG
|
+$41.4M |
| 2 |
Berkshire Hathaway Class B
BRK.B
|
+$12.3M |
| 3 |
SPDR S&P 500 ETF Trust
SPY
|
+$9.89M |
| 4 |
Alibaba
BABA
|
+$9.66M |
| 5 |
Intel
INTC
|
+$9.11M |
Top Sells
| 1 |
Apple
AAPL
|
+$36.8M |
| 2 |
Gilead Sciences
GILD
|
+$31.2M |
| 3 |
Booking.com
BKNG
|
+$29M |
| 4 |
Amazon
AMZN
|
+$25.6M |
| 5 |
Baidu
BIDU
|
+$12.9M |
Sector Composition
| 1 | Communication Services | 13.31% |
| 2 | Consumer Discretionary | 13.07% |
| 3 | Healthcare | 12.41% |
| 4 | Technology | 11.91% |
| 5 | Financials | 8.28% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
1201
ACI Worldwide
ACIW
$5.18B
| $13K | ﹤0.01% |
637
+484
| +316% | +$9.88K |
|
1202
Accuray
ARAY
$177M
| $13K | ﹤0.01% |
+1,480
| New | +$13K |
|
1203
Equinor
EQNR
$61.2B
| $13K | ﹤0.01% |
+747
| New | +$13K |
|
1204
Frontline
FRO
$5.17B
| $13K | ﹤0.01% |
+1,221
| New | +$13K |
|
1205
Green Dot
GDOT
$751M
| $13K | ﹤0.01% |
858
-4,800
| -85% | -$72.7K |
|
1206
Geron
GERN
$810M
| $13K | ﹤0.01% |
3,519
-3,481
| -50% | -$12.9K |
|
1207
Immersion
IMMR
$221M
| $13K | ﹤0.01% |
1,447
+801
| +124% | +$7.2K |
|
1208
LivePerson
LPSN
$86M
| $13K | ﹤0.01% |
+1,276
| New | +$13K |
|
1209
Live Nation Entertainment
LYV
$40.3B
| $13K | ﹤0.01% |
+543
| New | +$13K |
|
1210
OneSpan
OSPN
$588M
| $13K | ﹤0.01% |
640
-2,000
| -76% | -$40.6K |
|
1211
FreightCar America
RAIL
$162M
| $13K | ﹤0.01% |
+437
| New | +$13K |
|
1212
Rigel Pharmaceuticals
RIGL
$681M
| $13K | ﹤0.01% |
374
+373
| +37,300% | +$13K |
|
1213
VanEck Steel ETF
SLX
$82.3M
| $13K | ﹤0.01% |
+424
| New | +$13K |
|
1214
Taylor Morrison
TMHC
$6.88B
| $13K | ﹤0.01% |
+627
| New | +$13K |
|
1215
ProShares Ultra Real Estate
URE
$60.8M
| $13K | ﹤0.01% |
+238
| New | +$13K |
|
|
PACW
1216
DELISTED
PacWest Bancorp
PACW
| $13K | ﹤0.01% |
286
+221
| +340% | +$10K |
|
|
RAD
1217
DELISTED
Rite Aid Corporation
RAD
| $13K | ﹤0.01% |
80
-1,655
| -95% | -$269K |
|
|
TA
1218
DELISTED
TravelCenters of America LLC
TA
| $13K | ﹤0.01% |
149
+125
| +521% | +$10.9K |
|
|
NUAN
1219
DELISTED
Nuance Communications, Inc.
NUAN
| $13K | ﹤0.01% |
1,048
-1,924
| -65% | -$23.9K |
|
|
XONE
1220
DELISTED
The ExOne Company
XONE
| $13K | ﹤0.01% |
1,023
-7,581
| -88% | -$96.3K |
|
|
CORE
1221
DELISTED
Core Mark Holding Co., Inc.
CORE
| $13K | ﹤0.01% |
+418
| New | +$13K |
|
|
LEAF
1222
DELISTED
Leaf Group Ltd.
LEAF
| $13K | ﹤0.01% |
2,424
-7,400
| -75% | -$39.7K |
|
|
JE
1223
DELISTED
Just Energy Group Inc
JE
| $13K | ﹤0.01% |
89
+63
| +242% | +$9.2K |
|
|
CALL
1224
DELISTED
magicJack VocalTec Ltd
CALL
| $13K | ﹤0.01% |
1,910
-13,104
| -87% | -$89.2K |
|
|
SKUL
1225
DELISTED
SKULLCANDY INC
SKUL
| $13K | ﹤0.01% |
+1,177
| New | +$13K |
|