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 | |
|---|---|---|---|---|---|---|
126
CALL
RTX Corp
RTX
$262B
| $28.6M | 0.11% |
3,636
+199
| +6% | +$15.6K |
|
127
PUT
JD.com
JD
$41.1B
| $28.5M | 0.11% |
7,306
+2,004
| +38% | +$77.3K |
|
128
CALL
Qualcomm
QCOM
$183B
| $27.8M | 0.11% |
4,955
-2,557
| -34% | -$143K |
|
129
CALL
Union Pacific
UNP
$176B
| $27.1M | 0.11% |
1,911
-1,198
| -39% | -$167K |
|
130
CALL
Lowe's Companies
LOW
$115B
| $26.8M | 0.1% |
2,801
+464
| +20% | +$42K |
|
131
CALL
Wells Fargo
WFC
$266B
| $26.7M | 0.1% |
4,812
+2,056
| +75% | +$110K |
|
132
CALL
Deere & Co
DE
$158B
| $26.6M | 0.1% |
1,902
+624
| +49% | +$92K |
|
133
PUT
Applied Materials
AMAT
$448B
| $26.5M | 0.1% |
5,741
+2,829
| +97% | +$146K |
|
134
PUT
Nike
NKE
$63.7B
| $26.3M | 0.1% |
3,304
+822
| +33% | +$57.9K |
|
135
PUT
Blackrock
BLK
$163B
| $26.1M | 0.1% |
524
-182
| -26% | -$96.2K |
|
136
CALL
ProShares UltraShort Health Care
RXD
$3.35M
| $26.1M | 0.1% |
1,782
+1,071
| +151% | +$124K |
|
137
CALL
Verizon
VZ
$183B
| $26M | 0.1% |
5,168
+1,656
| +47% | +$80.2K |
|
138
CALL
United Parcel Service
UPS
$96.2B
| $25.8M | 0.1% |
2,429
-1,048
| -30% | -$118K |
|
139
PUT
AT&T
T
$155B
| $25.6M | 0.1% |
10,569
+1,940
| +22% | +$48.7K |
|
140
PUT
American Express
AXP
$240B
| $25.2M | 0.1% |
2,569
+948
| +58% | +$93.2K |
|
|
141
CALL
Nike
NKE
$63.7B
| $25M | 0.1% |
3,142
+19
| +0.6% | +$1.34K |
|
142
Boeing
BA
$161B
| $25M | 0.1% |
74,606
+62,446
| +514% | +$21.5M |
|
|
143
NVIDIA
NVDA
$5.02T
| $24.9M | 0.1% |
4,201,720
+3,868,080
| +1,159% | +$23.5M |
|
144
PUT
Johnson & Johnson
JNJ
$599B
| $24.8M | 0.1% |
2,045
-103
| -5% | -$12.8K |
|
145
CALL
3M
MMM
$89.1B
| $24.7M | 0.1% |
1,500
-115
| -7% | -$19.6K |
|
146
CALL
Intel
INTC
$530B
| $24.5M | 0.1% |
4,932
-3,718
| -43% | -$197K |
|
147
PUT
lululemon athletica
LULU
$13.2B
| $24.2M | 0.09% |
1,940
+1,428
| +279% | +$152K |
|
148
PUT
SLB Ltd
SLB
$69.7B
| $24.1M | 0.09% |
3,593
-517
| -13% | -$35.5K |
|
149
PUT
Target
TGT
$63.4B
| $23.9M | 0.09% |
3,139
-282
| -8% | -$20.8K |
|
150
CALL
Gilead Sciences
GILD
$165B
| $23.7M | 0.09% |
3,343
-715
| -18% | -$50.5K |
|
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.