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 | |
|---|---|---|---|---|---|---|
701
CALL
Hasbro
HAS
$12.4B
| $4.85M | 0.01% |
571
+241
| +73% | +$21K |
|
702
PUT
Helen of Troy
HELE
$625M
| $4.85M | 0.01% |
418
+346
| +481% | +$39.9K |
|
703
PUT
Cheniere Energy
LNG
$57B
| $4.84M | 0.01% |
708
-865
| -55% | -$56.9K |
|
704
PUT
Allstate
ALL
$65.5B
| $4.83M | 0.01% |
513
-165
| -24% | -$14.9K |
|
705
PUT
Affiliated Managers Group
AMG
$9.19B
| $4.83M | 0.01% |
451
-2
| -0.4% | -$212 |
|
706
PUT
Toyota
TM
$209B
| $4.83M | 0.01% |
409
+308
| +305% | +$37.3K |
|
707
PUT
StoneCo
STNE
$2.67B
| $4.83M | 0.01% |
+1,174
| New | +$31.9K |
|
708
CALL
Synopsys
SNPS
$71.5B
| $4.81M | 0.01% |
418
-225
| -35% | -$22.3K |
|
709
CALL
Suncor Energy
SU
$78.4B
| $4.81M | 0.01% |
1,482
+430
| +41% | +$14K |
|
710
PUT
American International
AIG
$41.4B
| $4.8M | 0.01% |
1,116
-1,524
| -58% | -$65.2K |
|
711
CALL
Incyte
INCY
$23.3B
| $4.8M | 0.01% |
558
-250
| -31% | -$20.3K |
|
712
CALL
First Solar
FSLR
$22.1B
| $4.78M | 0.01% |
905
+380
| +72% | +$19.1K |
|
713
CALL
Kroger
KR
$34.2B
| $4.77M | 0.01% |
1,941
+679
| +54% | +$18.6K |
|
714
CALL
Royal Caribbean
RCL
$76B
| $4.77M | 0.01% |
416
-649
| -61% | -$73.8K |
|
715
CALL
United States Oil Fund
USO
$2.5B
| $4.77M | 0.01% |
477
+234
| +96% | +$21.5K |
|
716
CALL
Norfolk Southern
NSC
$78.3B
| $4.76M | 0.01% |
255
-303
| -54% | -$52.4K |
|
717
CALL
Illinois Tool Works
ITW
$79.7B
| $4.75M | 0.01% |
331
+168
| +103% | +$23.2K |
|
|
WBC
718
PUT
DELISTED
WABCO HOLDINGS INC.
WBC
| $4.75M | 0.01% |
360
+325
| +929% | +$40K |
|
719
PUT
Liberty Global Class C
LBTYK
$3.37B
| $4.72M | 0.01% |
1,908
+519
| +37% | +$12.3K |
|
720
PUT
Invesco DB US Dollar Index Bullish Fund
UUP
$434M
| $4.72M | 0.01% |
1,812
+595
| +49% | +$15.3K |
|
721
CALL
Lumen
LUMN
$6.73B
| $4.7M | 0.01% |
3,921
-902
| -19% | -$12.5K |
|
722
MongoDB
MDB
$24.1B
| $4.7M | 0.01% |
31,935
+28,995
| +986% | +$2.98M |
|
723
CALL
Sherwin-Williams
SHW
$76.6B
| $4.69M | 0.01% |
327
+312
| +2,080% | +$43.4K |
|
724
PUT
Dollar General
DG
$25.4B
| $4.69M | 0.01% |
393
+39
| +11% | +$4.54K |
|
725
CALL
Estee Lauder
EL
$28.9B
| $4.68M | 0.01% |
283
+88
| +45% | +$12.9K |
|
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.