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
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$148M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$67.3M |
| 3 |
Meta Platforms (Facebook)
META
|
+$63.2M |
| 4 |
Goldman Sachs
GS
|
+$23.9M |
| 5 |
Citigroup
C
|
+$23.1M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Berkshire Hathaway Class B
BRK.B
|
+$47.5M |
| 2 |
Apple
AAPL
|
+$46M |
| 3 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$44.5M |
| 4 |
Micron Technology
MU
|
+$29.1M |
| 5 |
Adobe
ADBE
|
+$22.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 1.13% |
| 2 | Communication Services | 0.89% |
| 3 | Technology | 0.68% |
| 4 | Industrials | 0.51% |
| 5 | Healthcare | 0.44% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1076
PUT
Kimberly-Clark
KMB
$35.6B
| $2.46M | 0.01% |
217
-253
| -54% | -$28.4K |
|
1077
PUT
Alcoa
AA
$11.9B
| $2.46M | 0.01% |
610
-135
| -18% | -$5.87K |
|
1078
CALL
Ambarella
AMBA
$3.09B
| $2.46M | 0.01% |
637
-255
| -29% | -$9.88K |
|
1079
PUT
Tanger
SKT
$4.72B
| $2.46M | 0.01% |
1,074
+814
| +313% | +$19.2K |
|
1080
PUT
Dillards
DDS
$8.76B
| $2.45M | 0.01% |
321
+8
| +3% | +$649 |
|
1081
PUT
International Flavors & Fragrances
IFF
$18.8B
| $2.45M | 0.01% |
176
+157
| +826% | +$20.6K |
|
1082
PUT
Teleflex
TFX
$5.81B
| $2.45M | 0.01% |
92
-103
| -53% | -$26.7K |
|
|
IMMU
1083
PUT
DELISTED
Immunomedics Inc
IMMU
| $2.45M | 0.01% |
1,175
-295
| -20% | -$6.99K |
|
1084
PUT
Jazz Pharmaceuticals
JAZZ
$16B
| $2.44M | 0.01% |
145
+21
| +17% | +$3.61K |
|
|
NTRI
1085
CALL
DELISTED
NutriSystem, Inc.
NTRI
| $2.43M | 0.01% |
657
+644
| +4,954% | +$24.9K |
|
|
LOGM
1086
PUT
DELISTED
LogMein, Inc.
LOGM
| $2.43M | 0.01% |
273
-38
| -12% | -$3.44K |
|
1087
PUT
PTC
PTC
$13.1B
| $2.43M | 0.01% |
229
-179
| -44% | -$17.5K |
|
1088
PUT
Cracker Barrel
CBRL
$1.16B
| $2.43M | 0.01% |
165
+118
| +251% | +$17.7K |
|
1089
PUT
Capri Holdings
CPRI
$1.78B
| $2.43M | 0.01% |
354
+61
| +21% | +$4.27K |
|
|
JOYY
1090
JOYY Inc
JOYY
$3.66B
| $2.42M | 0.01% |
+32,380
| New | +$2.72M |
|
1091
United Rentals
URI
$71.4B
| $2.42M | 0.01% |
14,778
+11,604
| +366% | +$1.81M |
|
1092
PUT
ManpowerGroup
MAN
$2.32B
| $2.42M | 0.01% |
281
+263
| +1,461% | +$23.4K |
|
|
BRSL
1093
Brightstar Lottery PLC
BRSL
$1.9B
| $2.41M | 0.01% |
122,122
+99,527
| +440% | +$2.17M |
|
1094
PUT
Pultegroup
PHM
$23.7B
| $2.41M | 0.01% |
973
+258
| +36% | +$7.31K |
|
|
PPLI
1095
People Inc
PPLI
$3.14B
| $2.41M | 0.01% |
62,204
-4,393
| -7% | -$143K |
|
1096
PUT
C.H. Robinson
CHRW
$24.2B
| $2.41M | 0.01% |
246
+32
| +15% | +$3K |
|
1097
CALL
Live Nation Entertainment
LYV
$41B
| $2.41M | 0.01% |
442
+357
| +420% | +$18.1K |
|
1098
CALL
Axalta
AXTA
$6.78B
| $2.4M | 0.01% |
825
+590
| +251% | +$17.7K |
|
1099
CALL
Stellantis
STLA
$16.7B
| $2.4M | 0.01% |
1,371
+898
| +190% | +$15.9K |
|
1100
Yelp
YELP
$1.35B
| $2.39M | 0.01% |
+48,620
| New | +$2.12M |
|
Similar funds
Simplex Trading's Q3 2018 Portfolio in Review
As of Q3 2018, Simplex Trading held 8,699 positions worth $31.1B, up 22% from $25.5B the previous quarter. Its ten largest holdings account for 34% of the portfolio.
Simplex Trading's Q3 2018 filing shows 1,336 new, 3,066 increased, 2,755 reduced and 1,315 closed positions. Its largest new stake was Invesco QQQ Trust: 371,806 shares worth $69.1M. The largest sale was Berkshire Hathaway Class B, an estimated $47.5M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 1.1% of assets, up from 0.92% a quarter earlier, followed by Communication Services and Technology.
- Simplex Trading's largest Q3 2018 buy was Invesco QQQ Trust: 371,806 shares worth $69.1M.
- Simplex Trading added most to Amazon in Q3 2018, an estimated $148M increase.
- Simplex Trading's biggest Q3 2018 reduction was Apple, cutting an estimated $46M.
- Simplex Trading fully exited Berkshire Hathaway Class B in Q3 2018, selling an estimated $47.5M.
- Simplex Trading's ten largest holdings make up 34% of its $31.1B portfolio in Q3 2018.
- Simplex Trading opened 1,336 new positions and closed 1,315 in Q3 2018.
- Simplex Trading's portfolio value rose 22% quarter-over-quarter to $31.1B.
Based on Simplex Trading's 13F filing for Q3 2018, filed 23 Oct 2018.