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 | |
|---|---|---|---|---|---|---|
1126
CALL
Teladoc Health
TDOC
$1.56B
| $2.32M | 0.01% |
269
+30
| +13% | +$2.14K |
|
1127
CALL
Aflac
AFL
$63.3B
| $2.32M | 0.01% |
493
+195
| +65% | +$8.92K |
|
|
GTT
1128
PUT
DELISTED
GTT Communications, Inc.
GTT
| $2.32M | 0.01% |
534
+483
| +947% | +$20.6K |
|
1129
CALL
Ralph Lauren
RL
$22.1B
| $2.31M | 0.01% |
168
+6
| +4% | +$800 |
|
1130
PUT
TechnipFMC
FTI
$30.3B
| $2.31M | 0.01% |
992
+411
| +71% | +$9.32K |
|
1131
PUT
Viking Therapeutics
VKTX
$4.11B
| $2.31M | 0.01% |
1,324
+1,066
| +413% | +$12.7K |
|
1132
CALL
Toronto Dominion Bank
TD
$197B
| $2.3M | 0.01% |
379
-12
| -3% | -$715 |
|
1133
PUT
Ciena
CIEN
$57.7B
| $2.3M | 0.01% |
736
+174
| +31% | +$4.88K |
|
1134
PUT
KLA
KLAC
$286B
| $2.3M | 0.01% |
2,260
+1,550
| +218% | +$16.9K |
|
|
MIC
1135
PUT
DELISTED
Macquarie Infrastructure Holdings, LLC
MIC
| $2.3M | 0.01% |
498
+235
| +89% | +$10.7K |
|
1136
Macy's
M
$6.14B
| $2.29M | 0.01% |
+66,092
| New | +$2.46M |
|
1137
PUT
Howmet Aerospace
HWM
$115B
| $2.29M | 0.01% |
1,372
+775
| +130% | +$12.3K |
|
1138
PUT
Duke Energy
DUK
$101B
| $2.29M | 0.01% |
286
+155
| +118% | +$12.5K |
|
|
LNW
1139
CALL
DELISTED
Light & Wonder
LNW
| $2.29M | 0.01% |
901
+378
| +72% | +$13.7K |
|
1140
CALL
SPS Commerce
SPSC
$2.17B
| $2.28M | 0.01% |
460
+308
| +203% | +$13.8K |
|
1141
PUT
DXC Technology
DXC
$1.5B
| $2.28M | 0.01% |
248
+206
| +490% | +$18.2K |
|
1142
CALL
Marvell Technology
MRVL
$188B
| $2.28M | 0.01% |
1,181
+385
| +48% | +$7.92K |
|
|
WBC
1143
PUT
DELISTED
WABCO HOLDINGS INC.
WBC
| $2.28M | 0.01% |
193
-65
| -25% | -$7.85K |
|
|
WWE
1144
CALL
DELISTED
World Wrestling Entertainment
WWE
| $2.27M | 0.01% |
235
-643
| -73% | -$53.2K |
|
1145
PUT
Annaly Capital Management
NLY
$16.7B
| $2.27M | 0.01% |
555
+325
| +141% | +$13.6K |
|
|
ROCC
1146
PUT
DELISTED
Ranger Oil Corporation Class A Common Stock
ROCC
| $2.27M | 0.01% |
282
-185
| -40% | -$15.2K |
|
1147
CALL
Vulcan Materials
VMC
$35.7B
| $2.27M | 0.01% |
204
-29
| -12% | -$3.36K |
|
|
DNB
1148
DELISTED
Dun & Bradstreet
DNB
| $2.27M | 0.01% |
15,895
+8,651
| +119% | +$1.18M |
|
1149
PUT
Agilent Technologies
A
$39.5B
| $2.26M | 0.01% |
321
-476
| -60% | -$31.5K |
|
1150
Assurant
AIZ
$13.6B
| $2.26M | 0.01% |
20,943
+1,053
| +5% | +$111K |
|
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.