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 | |
|---|---|---|---|---|---|---|
1151
PUT
Progressive
PGR
$124B
| $2.57M | 0.01% |
357
-177
| -33% | -$12.1K |
|
1152
CALL
Albemarle
ALB
$13.5B
| $2.56M | 0.01% |
313
-119
| -28% | -$9.73K |
|
1153
Ralph Lauren
RL
$22.2B
| $2.56M | 0.01% |
19,728
-11,099
| -36% | -$1.32M |
|
|
BBL
1154
CALL
DELISTED
BHP Group Plc American Depositary Shares (Each representing two Ordinary Shares)
BBL
| $2.56M | 0.01% |
530
+339
| +177% | +$15.2K |
|
1155
PUT
Regenxbio
RGNX
$623M
| $2.56M | 0.01% |
446
+439
| +6,271% | +$21.7K |
|
1156
PUT
Wingstop
WING
$3.68B
| $2.55M | 0.01% |
336
+260
| +342% | +$17.7K |
|
|
KL
1157
CALL
DELISTED
Kirkland Lake Gold Ltd Ordinary
KL
| $2.55M | 0.01% |
840
+527
| +168% | +$16.7K |
|
1158
CALL
EPAM Systems
EPAM
$4.69B
| $2.55M | 0.01% |
151
+117
| +344% | +$17.5K |
|
1159
PUT
Philips
PHG
$25.4B
| $2.55M | 0.01% |
805
+175
| +28% | +$5.21K |
|
1160
CALL
Leidos
LDOS
$14.1B
| $2.55M | 0.01% |
398
+372
| +1,431% | +$22.5K |
|
1161
PUT
UBS Group
UBS
$170B
| $2.55M | 0.01% |
2,106
+1,334
| +173% | +$16.9K |
|
|
COHR
1162
PUT
DELISTED
Coherent Inc
COHR
| $2.55M | 0.01% |
180
+101
| +128% | +$12.8K |
|
1163
CALL
GoDaddy
GDDY
$12.3B
| $2.55M | 0.01% |
339
+211
| +165% | +$14.8K |
|
1164
PUT
Nu Skin
NUS
$247M
| $2.54M | 0.01% |
531
+525
| +8,750% | +$31.8K |
|
|
VRNT
1165
CALL
DELISTED
Verint Systems
VRNT
| $2.53M | 0.01% |
828
+795
| +2,409% | +$20.2K |
|
1166
CALL
Waste Management
WM
$95.9B
| $2.52M | 0.01% |
243
+161
| +196% | +$15.7K |
|
|
ICPT
1167
CALL
DELISTED
Intercept Pharmaceuticals, Inc.
ICPT
| $2.52M | 0.01% |
225
-60
| -21% | -$6.56K |
|
1168
iShares MSCI South Korea ETF
EWY
$21.7B
| $2.51M | 0.01% |
41,252
-2,001
| -5% | -$124K |
|
1169
CALL
Viasat
VSAT
$9.79B
| $2.51M | 0.01% |
324
+32
| +11% | +$2.23K |
|
|
EQM
1170
CALL
DELISTED
EQM Midstream Partners, LP
EQM
| $2.51M | 0.01% |
+543
| New | +$23.7K |
|
1171
PUT
Invesco S&P SmallCap Low Volatility ETF
XSLV
$249M
| $2.51M | 0.01% |
1,106
-43
| -4% | -$2K |
|
1172
PUT
Marvell Technology
MRVL
$174B
| $2.5M | 0.01% |
1,259
+672
| +114% | +$12.6K |
|
1173
CALL
Western Union
WU
$2.57B
| $2.5M | 0.01% |
1,354
+739
| +120% | +$13.3K |
|
1174
CALL
ProShares Ultra S&P500
SSO
$7.82B
| $2.5M | 0.01% |
2,944
-5,216
| -64% | -$71.1K |
|
|
MDCO
1175
CALL
DELISTED
Medicines Co
MDCO
| $2.5M | 0.01% |
894
+212
| +31% | +$5K |
|
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.