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 | |
|---|---|---|---|---|---|---|
3101
BJs Wholesale Club
BJ
$11.9B
| $318K | ﹤0.01% |
+11,908
| New | +$319K |
|
3102
Baytex Energy
BTE
$3.08B
| $318K | ﹤0.01% |
109,334
+104,336
| +2,088% | +$320K |
|
|
CIVI
3103
CALL
DELISTED
Civitas Resources
CIVI
| $318K | ﹤0.01% |
107
+40
| +60% | +$1.33K |
|
|
IRBT
3104
DELISTED
iRobot
IRBT
| $318K | ﹤0.01% |
+2,898
| New | +$273K |
|
3105
NETSCOUT
NTCT
$2.86B
| $318K | ﹤0.01% |
12,599
+3,904
| +45% | +$106K |
|
3106
CALL
Ovintiv
OVV
$17.5B
| $318K | ﹤0.01% |
49
-1
| -2% | -$65 |
|
3107
PUT
RPM International
RPM
$13.7B
| $318K | ﹤0.01% |
49
-1
| -2% | -$64 |
|
3108
CALL
Skywest
SKYW
$4.11B
| $318K | ﹤0.01% |
54
-66
| -55% | -$3.91K |
|
3109
CALL
Zebra Technologies
ZBRA
$12.4B
| $318K | ﹤0.01% |
18
-22
| -55% | -$3.52K |
|
|
LLL
3110
CALL
DELISTED
L3 Technologies, Inc.
LLL
| $318K | ﹤0.01% |
15
-106
| -88% | -$22.1K |
|
|
PGTI
3111
PUT
DELISTED
PGT, Inc.
PGTI
| $317K | ﹤0.01% |
147
-13
| -8% | -$304 |
|
3112
PUT
Curtiss-Wright
CW
$27.7B
| $316K | ﹤0.01% |
23
+8
| +53% | +$1.05K |
|
3113
PUT
Gerdau
GGB
$9.44B
| $316K | ﹤0.01% |
946
-1,016
| -52% | -$3.27K |
|
3114
PUT
Heron Therapeutics
HRTX
$86.3M
| $316K | ﹤0.01% |
100
-680
| -87% | -$25.3K |
|
3115
PUT
Vermilion Energy
VET
$1.73B
| $316K | ﹤0.01% |
96
-18
| -16% | -$601 |
|
|
ARI
3116
CALL
Apollo Commercial Real Estate
ARI
$887M
| $315K | ﹤0.01% |
167
| – | – |
|
3117
CALL
Ceragon Networks
CRNT
$194M
| $315K | ﹤0.01% |
937
-49
| -5% | -$167 |
|
|
CPE
3118
PUT
DELISTED
Callon Petroleum Company
CPE
| $315K | ﹤0.01% |
26
-13
| -33% | -$1.45K |
|
|
RFP
3119
CALL
DELISTED
Resolute Forest Products Inc.
RFP
| $315K | ﹤0.01% |
244
+95
| +64% | +$1.19K |
|
3120
CALL
Pegasystems
PEGA
$4.41B
| $313K | ﹤0.01% |
100
-38
| -28% | -$1.15K |
|
|
3121
PUT
Pegasystems
PEGA
$4.41B
| $313K | ﹤0.01% |
100
-26
| -21% | -$786 |
|
|
REN
3122
DELISTED
Resolute Energy Corporaton
REN
| $313K | ﹤0.01% |
+8,281
| New | +$270K |
|
3123
PUT
FirstEnergy
FE
$28.9B
| $312K | ﹤0.01% |
84
-91
| -52% | -$3.33K |
|
3124
Cheniere Energy
LNG
$56.5B
| $312K | ﹤0.01% |
4,498
+2,042
| +83% | +$132K |
|
3125
CALL
Pentair
PNR
$10.2B
| $312K | ﹤0.01% |
73
+49
| +204% | +$2.13K |
|
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.