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 |
Apple
AAPL
|
+$34.5M |
| 2 |
Micron Technology
MU
|
+$33.9M |
| 3 |
Berkshire Hathaway Class B
BRK.B
|
+$30.8M |
| 4 |
NVIDIA
NVDA
|
+$23.5M |
| 5 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$22.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
TWX
Time Warner Inc
TWX
|
+$34.8M |
| 2 |
Amazon
AMZN
|
+$31.2M |
| 3 |
Tesla
TSLA
|
+$17.6M |
| 4 |
Netflix
NFLX
|
+$15.5M |
| 5 |
Advanced Micro Devices
AMD
|
+$12.9M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 1.23% |
| 2 | Consumer Discretionary | 0.92% |
| 3 | Communication Services | 0.73% |
| 4 | Financials | 0.62% |
| 5 | Industrials | 0.6% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
3876
STMicroelectronics
STM
$44.7B
| $143K | ﹤0.01% |
6,497
+1,925
| +42% | +$44.7K |
|
3877
USA Compression Partners
USAC
$3.75B
| $143K | ﹤0.01% |
8,512
+7,614
| +848% | +$136K |
|
|
ECHO
3878
CALL
DELISTED
Echo Global Logistics, Inc.
ECHO
| $143K | ﹤0.01% |
49
+9
| +23% | +$257 |
|
|
OCLR
3879
PUT
DELISTED
Oclaro Inc.
OCLR
| $143K | ﹤0.01% |
+161
| New | +$1.41K |
|
3880
Kadant
KAI
$3.72B
| $142K | ﹤0.01% |
1,480
+232
| +19% | +$22.3K |
|
3881
CALL
Neurogene
NGNE
$663M
| $142K | ﹤0.01% |
27
+26
| +2,600% | +$6.78K |
|
3882
PUT
Tennant Co
TNC
$1.5B
| $142K | ﹤0.01% |
+18
| New | +$1.35K |
|
|
AAC
3883
PUT
DELISTED
AAC Holdings
AAC
| $142K | ﹤0.01% |
152
+71
| +88% | +$776 |
|
|
NTP
3884
DELISTED
Nam Tai Property Inc.
NTP
| $142K | ﹤0.01% |
13,008
+3,680
| +39% | +$44.3K |
|
|
PRMW
3885
DELISTED
Primo Water Corporation
PRMW
| $142K | ﹤0.01% |
+8,121
| New | +$120K |
|
3886
Liberty Media Series A
FWONA
$23.3B
| $141K | ﹤0.01% |
4,190
+3,137
| +298% | +$90.5K |
|
3887
CALL
National CineMedia
NCMI
$371M
| $141K | ﹤0.01% |
17
+6
| +55% | +$407 |
|
3888
Viking Therapeutics
VKTX
$3.93B
| $141K | ﹤0.01% |
14,954
+7,157
| +92% | +$47.6K |
|
|
SJR
3889
DELISTED
Shaw Communications Inc.
SJR
| $141K | ﹤0.01% |
6,956
+3,172
| +84% | +$64.8K |
|
|
AZUL
3890
CALL
DELISTED
Azul
AZUL
| $140K | ﹤0.01% |
86
+82
| +2,050% | +$2.06K |
|
3891
CALL
Carlisle Companies
CSL
$14.1B
| $140K | ﹤0.01% |
+13
| New | +$1.38K |
|
3892
Molina Healthcare
MOH
$10.5B
| $140K | ﹤0.01% |
+1,436
| New | +$125K |
|
3893
PTC Therapeutics
PTCT
$6.25B
| $140K | ﹤0.01% |
+4,161
| New | +$130K |
|
3894
RB Global
RBA
$21.7B
| $140K | ﹤0.01% |
4,132
+3,648
| +754% | +$123K |
|
3895
Sprouts Farmers Market
SFM
$7.31B
| $140K | ﹤0.01% |
6,374
-3,200
| -33% | -$72.4K |
|
3896
PUT
VirnetX Holding Corp
VHC
$54.4M
| $140K | ﹤0.01% |
21
+5
| +31% | +$325 |
|
|
TEN
3897
Tsakos Energy Navigation Ltd
TEN
$1.18B
| $140K | ﹤0.01% |
7,563
+7,387
| +4,197% | +$133K |
|
|
AT
3898
PUT
DELISTED
Atlantic Power Corporation
AT
| $140K | ﹤0.01% |
638
+518
| +432% | +$1.14K |
|
3899
CALL
Alliance Resource Partners
ARLP
$3.33B
| $139K | ﹤0.01% |
76
-49
| -39% | -$883 |
|
3900
CALL
Icahn Enterprises
IEP
$5.26B
| $139K | ﹤0.01% |
24
-16
| -40% | -$1.08K |
|
Similar funds
Simplex Trading's Q2 2018 Portfolio in Review
As of Q2 2018, Simplex Trading held 8,400 positions worth $25.5B, up 1,022% from $2.27B the previous quarter. Its ten largest holdings account for 29% of the portfolio.
Simplex Trading's Q2 2018 filing shows 2,282 new, 2,314 increased, 2,591 reduced and 1,035 closed positions. Its largest new stake was Alphabet (Google) Class C: 291,860 shares worth $16.3M. The largest sale was Time Warner Inc, an estimated $34.8M.
By sector, the portfolio is most concentrated in Technology at 1.2% of assets, down from 6.2% a quarter earlier, followed by Consumer Discretionary and Communication Services.
- Simplex Trading's largest Q2 2018 buy was Alphabet (Google) Class C: 291,860 shares worth $16.3M.
- Simplex Trading added most to Apple in Q2 2018, an estimated $34.5M increase.
- Simplex Trading's biggest Q2 2018 reduction was Amazon, cutting an estimated $31.2M.
- Simplex Trading fully exited Time Warner Inc in Q2 2018, selling an estimated $34.8M.
- Simplex Trading's ten largest holdings make up 29% of its $25.5B portfolio in Q2 2018.
- Simplex Trading opened 2,282 new positions and closed 1,035 in Q2 2018.
- Simplex Trading's portfolio value rose 1,022% quarter-over-quarter to $25.5B.
Based on Simplex Trading's 13F filing for Q2 2018, filed 30 Jul 2018.