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 |
Invesco QQQ Trust
QQQ
|
+$86.9M |
| 2 |
Walt Disney
DIS
|
+$25.5M |
| 3 |
Baidu
BIDU
|
+$12.3M |
| 4 |
Alphabet (Google) Class A
GOOGL
|
+$12.3M |
| 5 |
RHT
Red Hat Inc
RHT
|
+$11.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$66M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$60.3M |
| 3 |
Alphabet (Google) Class C
GOOG
|
+$33.9M |
| 4 |
Apple
AAPL
|
+$21.1M |
| 5 |
State Street Financial Select Sector SPDR ETF
XLF
|
+$18.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Communication Services | 0.58% |
| 2 | Technology | 0.42% |
| 3 | Healthcare | 0.34% |
| 4 | Consumer Discretionary | 0.29% |
| 5 | Industrials | 0.21% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
126
PUT
Philip Morris
PM
$304B
| $37.8M | 0.11% |
4,280
+3,153
| +280% | +$254K |
|
127
PUT
Wynn Resorts
WYNN
$9.88B
| $37.8M | 0.11% |
3,166
-205
| -6% | -$24.5K |
|
128
PUT
Shopify
SHOP
$153B
| $37.7M | 0.1% |
18,260
+5,340
| +41% | +$94.3K |
|
129
CALL
Procter & Gamble
PG
$349B
| $37.3M | 0.1% |
3,584
-578
| -14% | -$56.3K |
|
130
PUT
UnitedHealth
UNH
$393B
| $36.6M | 0.1% |
1,482
-1,156
| -44% | -$295K |
|
131
PUT
Twilio
TWLO
$27.9B
| $36.4M | 0.1% |
2,817
+1,382
| +96% | +$156K |
|
132
PUT
Nike
NKE
$62.3B
| $36M | 0.1% |
4,276
+1,299
| +44% | +$107K |
|
133
CALL
Biogen
BIIB
$29.6B
| $36M | 0.1% |
1,523
+641
| +73% | +$202K |
|
134
CALL
Berkshire Hathaway Class B
BRK.B
$1.05T
| $35.7M | 0.1% |
1,777
-2,361
| -57% | -$477K |
|
135
CALL
3M
MMM
$89.3B
| $35.1M | 0.1% |
2,021
+502
| +33% | +$84.5K |
|
136
CALL
AbbVie
ABBV
$451B
| $35M | 0.1% |
4,348
+1,034
| +31% | +$84.6K |
|
137
PUT
Caterpillar
CAT
$414B
| $34.9M | 0.1% |
2,573
-929
| -27% | -$123K |
|
138
Netflix
NFLX
$290B
| $34.8M | 0.1% |
976,930
+5,300
| +0.5% | +$184K |
|
139
CALL
FedEx
FDX
$76.1B
| $34.8M | 0.1% |
1,917
-3,877
| -67% | -$685K |
|
140
CALL
Verizon
VZ
$185B
| $34.7M | 0.1% |
5,867
+748
| +15% | +$42.4K |
|
141
PUT
PepsiCo
PEP
$185B
| $34.1M | 0.09% |
2,779
-143
| -5% | -$16.3K |
|
142
PUT
Roku
ROKU
$21.3B
| $34M | 0.09% |
5,270
-2,268
| -30% | -$121K |
|
143
CALL
Intel
INTC
$527B
| $32.2M | 0.09% |
5,989
-241
| -4% | -$12.2K |
|
144
CALL
lululemon athletica
LULU
$12.9B
| $32.1M | 0.09% |
1,957
+1,116
| +133% | +$163K |
|
145
PUT
Advanced Micro Devices
AMD
$908B
| $32M | 0.09% |
12,541
+201
| +2% | +$4.56K |
|
146
CALL
Tilray
TLRY
$525M
| $31.1M | 0.09% |
475
+262
| +123% | +$200K |
|
147
PUT
SLB Ltd
SLB
$71B
| $31M | 0.09% |
7,118
-1,397
| -16% | -$60.4K |
|
148
PUT
Oracle
ORCL
$364B
| $30.9M | 0.09% |
5,758
-3,616
| -39% | -$184K |
|
149
PUT
Lam Research
LRCX
$401B
| $30.7M | 0.09% |
17,130
+11,840
| +224% | +$198K |
|
150
PUT
Cisco
CSCO
$445B
| $29.6M | 0.08% |
5,483
+152
| +3% | +$7.38K |
|
Similar funds
Simplex Trading's Q1 2019 Portfolio in Review
As of Q1 2019, Simplex Trading held 8,479 positions worth $36B, up 5.5% from $34.1B the previous quarter. Its ten largest holdings account for 35% of the portfolio.
Simplex Trading's Q1 2019 filing shows 1,472 new, 3,049 increased, 2,419 reduced and 1,324 closed positions. Its largest new stake was Walt Disney: 228,471 shares worth $25.4M. The largest sale was Amazon, an estimated $66M.
By sector, the portfolio is most concentrated in Communication Services at 0.58% of assets, up from 0.49% a quarter earlier, followed by Technology and Healthcare.
- Simplex Trading's largest Q1 2019 buy was Walt Disney: 228,471 shares worth $25.4M.
- Simplex Trading added most to Invesco QQQ Trust in Q1 2019, an estimated $86.9M increase.
- Simplex Trading's biggest Q1 2019 reduction was iShares Russell 2000 ETF, cutting an estimated $60.3M.
- Simplex Trading fully exited Amazon in Q1 2019, selling an estimated $66M.
- Simplex Trading's ten largest holdings make up 35% of its $36B portfolio in Q1 2019.
- Simplex Trading opened 1,472 new positions and closed 1,324 in Q1 2019.
- Simplex Trading's portfolio value rose 5.5% quarter-over-quarter to $36B.
Based on Simplex Trading's 13F filing for Q1 2019, filed 18 Apr 2019.