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 | |
|---|---|---|---|---|---|---|
151
PUT
AbbVie
ABBV
$448B
| $29.6M | 0.08% |
3,671
+1,499
| +69% | +$123K |
|
152
CALL
Wells Fargo
WFC
$262B
| $29.5M | 0.08% |
6,113
-972
| -14% | -$47.8K |
|
|
RDS.A
153
PUT
DELISTED
Royal Dutch Shell PLC ADS Class A
RDS.A
| $29.3M | 0.08% |
4,633
+785
| +20% | +$48.5K |
|
|
154
PUT
Wells Fargo
WFC
$262B
| $29.1M | 0.08% |
6,029
+396
| +7% | +$19.5K |
|
155
CALL
Target
TGT
$62.6B
| $28.9M | 0.08% |
3,596
+118
| +3% | +$8.62K |
|
156
CALL
Starbucks
SBUX
$119B
| $28.5M | 0.08% |
3,835
-1,850
| -33% | -$127K |
|
157
PUT
3M
MMM
$89.1B
| $28.3M | 0.08% |
1,631
-751
| -32% | -$126K |
|
158
CALL
Amgen
AMGN
$198B
| $27.9M | 0.08% |
1,471
+452
| +44% | +$86.3K |
|
159
PUT
Bank of America
BAC
$433B
| $27.8M | 0.08% |
+10,069
| New | +$285K |
|
160
CALL
Gilead Sciences
GILD
$162B
| $27.8M | 0.08% |
4,273
-6,696
| -61% | -$445K |
|
161
CALL
Blackrock
BLK
$164B
| $27.4M | 0.08% |
642
-95
| -13% | -$39.9K |
|
|
WBA
162
CALL
DELISTED
Walgreens Boots Alliance
WBA
| $27.2M | 0.08% |
4,305
+1,761
| +69% | +$120K |
|
|
JJT
163
CALL
DELISTED
iPath Series B Bloomberg Tin Subindex Total ReturnSM ETN
JJT
| $27.2M | 0.08% |
9,369
+8,454
| +924% | +$446K |
|
164
PUT
Eli Lilly
LLY
$1.04T
| $26.7M | 0.07% |
2,061
+556
| +37% | +$67.6K |
|
165
PUT
AT&T
T
$160B
| $26.3M | 0.07% |
11,102
-4,537
| -29% | -$104K |
|
|
UCD
166
CALL
DELISTED
PROSHARES ULTRA BLOOMBERG COMMODITY
UCD
| $26.2M | 0.07% |
6,768
-4,669
| -41% | -$18.1M |
|
|
ALXN
167
PUT
DELISTED
Alexion Pharmaceuticals
ALXN
| $26.1M | 0.07% |
1,931
+1,385
| +254% | +$172K |
|
168
CALL
Intuitive Surgical
ISRG
$121B
| $26.1M | 0.07% |
1,371
-960
| -41% | -$171K |
|
|
TWTR
169
CALL
DELISTED
Twitter, Inc.
TWTR
| $25.8M | 0.07% |
7,853
-5,518
| -41% | -$175K |
|
170
CALL
American Airlines Group
AAL
$9.75B
| $25.6M | 0.07% |
8,071
-2,178
| -21% | -$73.2K |
|
|
171
Walt Disney
DIS
$166B
| $25.4M | 0.07% |
+228,471
| New | +$25.5M |
|
172
PUT
Intel
INTC
$516B
| $25M | 0.07% |
4,648
-1,394
| -23% | -$70.7K |
|
173
PUT
Ulta Beauty
ULTA
$20.8B
| $24.8M | 0.07% |
710
-115
| -14% | -$34.8K |
|
174
CALL
Twilio
TWLO
$27.8B
| $24.7M | 0.07% |
1,913
+86
| +5% | +$9.69K |
|
175
CALL
Philip Morris
PM
$303B
| $24.6M | 0.07% |
2,784
-225
| -7% | -$18.1K |
|
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.