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 | |
|---|---|---|---|---|---|---|
|
SNBR
2976
PUT
DELISTED
Sleep Number
SNBR
| $371K | ﹤0.01% |
79
-402
| -84% | -$16.2K |
|
2977
PUT
BlueLinx
BXC
$453M
| $370K | ﹤0.01% |
139
+133
| +2,217% | +$3.78K |
|
2978
CALL
Equitable Holdings
EQH
$13.3B
| $370K | ﹤0.01% |
184
+153
| +494% | +$2.92K |
|
|
MAG
2979
CALL
DELISTED
MAG Silver
MAG
| $370K | ﹤0.01% |
348
+241
| +225% | +$2.23K |
|
2980
CALL
Mercer International
MERC
$44.7M
| $370K | ﹤0.01% |
274
+229
| +509% | +$3.15K |
|
2981
CALL
Range Resources
RRC
$8.85B
| $370K | ﹤0.01% |
330
-144
| -30% | -$1.56K |
|
|
TRTX
2982
CALL
TPG RE Finance Trust
TRTX
$662M
| $370K | ﹤0.01% |
189
+137
| +263% | +$2.7K |
|
2983
CALL
HealthEquity
HQY
$8.28B
| $369K | ﹤0.01% |
50
-40
| -44% | -$2.81K |
|
2984
CALL
Southern Copper
SCCO
$141B
| $369K | ﹤0.01% |
100
+81
| +426% | +$2.59K |
|
|
HDS
2985
DELISTED
HD Supply Holdings, Inc.
HDS
| $368K | ﹤0.01% |
+8,500
| New | +$354K |
|
2986
PUT
Avanos Medical
AVNS
$1.17B
| $367K | ﹤0.01% |
86
+78
| +975% | +$3.49K |
|
2987
PUT
Lindsay Corp
LNN
$1.17B
| $367K | ﹤0.01% |
38
+3
| +9% | +$272 |
|
2988
CALL
MACOM Technology Solutions
MTSI
$20.1B
| $367K | ﹤0.01% |
220
+114
| +108% | +$1.99K |
|
2989
YPF
YPF
$20B
| $367K | ﹤0.01% |
26,200
-4,809
| -16% | -$70.5K |
|
|
ARQL
2990
CALL
DELISTED
Arqule Inc
ARQL
| $367K | ﹤0.01% |
768
-855
| -53% | -$3.3K |
|
2991
Builders FirstSource
BLDR
$7.82B
| $366K | ﹤0.01% |
27,498
+17,263
| +169% | +$227K |
|
2992
PUT
Cooper-Standard Automotive
CPS
$508M
| $366K | ﹤0.01% |
78
+67
| +609% | +$4.31K |
|
2993
CALL
Equinor
EQNR
$91.4B
| $366K | ﹤0.01% |
167
-7
| -4% | -$158 |
|
2994
PUT
Teradata
TDC
$2.8B
| $366K | ﹤0.01% |
84
+56
| +200% | +$2.52K |
|
2995
B&G Foods
BGS
$291M
| $365K | ﹤0.01% |
+14,961
| New | +$392K |
|
|
AXE
2996
DELISTED
Anixter International Inc
AXE
| $365K | ﹤0.01% |
6,519
+2,749
| +73% | +$161K |
|
|
CRCM
2997
CALL
DELISTED
CARE.COM, INC.
CRCM
| $365K | ﹤0.01% |
185
+71
| +62% | +$1.59K |
|
2998
CALL
Cerus
CERS
$615M
| $364K | ﹤0.01% |
585
-64
| -10% | -$389 |
|
|
HZNP
2999
PUT
DELISTED
Horizon Therapeutics Public Limited Company Ordinary Shares
HZNP
| $364K | ﹤0.01% |
138
+128
| +1,280% | +$3.03K |
|
3000
PUT
CareDx
CDNA
$1.88B
| $362K | ﹤0.01% |
115
+91
| +379% | +$2.65K |
|
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.