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 | |
|---|---|---|---|---|---|---|
|
PRO
1926
CALL
DELISTED
PROS Holdings
PRO
| $1.08M | ﹤0.01% |
257
+182
| +243% | +$6.91K |
|
|
CBPO
1927
CALL
DELISTED
China Biologic Products Holdings, Inc.
CBPO
| $1.08M | ﹤0.01% |
119
-44
| -27% | -$3.6K |
|
|
HES
1928
DELISTED
Hess
HES
| $1.08M | ﹤0.01% |
+17,954
| New | +$988K |
|
|
PRFT
1929
PUT
DELISTED
Perficient Inc
PRFT
| $1.08M | ﹤0.01% |
395
+32
| +9% | +$843 |
|
1930
CALL
Exponent
EXPO
$2.98B
| $1.08M | ﹤0.01% |
187
+179
| +2,238% | +$9.67K |
|
1931
CALL
Nomad Foods
NOMD
$1.64B
| $1.08M | ﹤0.01% |
528
+391
| +285% | +$7.52K |
|
1932
CALL
Enphase Energy
ENPH
$4.84B
| $1.08M | ﹤0.01% |
1,169
+40
| +4% | +$304 |
|
1933
CALL
Ventas
VTR
$48.9B
| $1.08M | ﹤0.01% |
169
-77
| -31% | -$4.81K |
|
1934
Vanguard Real Estate ETF
VNQ
$39.9B
| $1.08M | ﹤0.01% |
12,400
+4,217
| +52% | +$348K |
|
1935
PUT
Century Communities
CCS
$2B
| $1.08M | ﹤0.01% |
449
-110
| -20% | -$2.5K |
|
|
NAV
1936
DELISTED
Navistar International
NAV
| $1.08M | ﹤0.01% |
+33,342
| New | +$1.11M |
|
1937
PUT
Gen Digital
GEN
$15.6B
| $1.07M | ﹤0.01% |
468
-372
| -44% | -$8.1K |
|
|
MNDT
1938
PUT
DELISTED
Mandiant, Inc. Common Stock
MNDT
| $1.07M | ﹤0.01% |
640
-605
| -49% | -$10.2K |
|
|
INXN
1939
CALL
DELISTED
Interxion Holding N.V.
INXN
| $1.07M | ﹤0.01% |
161
+148
| +1,138% | +$9.17K |
|
1940
CALL
KB Home
KBH
$3.48B
| $1.07M | ﹤0.01% |
444
+157
| +55% | +$3.48K |
|
1941
PUT
Acuity Brands
AYI
$9.88B
| $1.07M | ﹤0.01% |
89
-315
| -78% | -$39.2K |
|
1942
CALL
InterDigital
IDCC
$6.68B
| $1.07M | ﹤0.01% |
162
+111
| +218% | +$7.72K |
|
|
HA
1943
CALL
DELISTED
Hawaiian Holdings, Inc.
HA
| $1.07M | ﹤0.01% |
407
+294
| +260% | +$8.54K |
|
|
CTST
1944
CALL
DELISTED
CannTrust Holdings Inc. Common Share
CTST
| $1.07M | ﹤0.01% |
+1,375
| New | +$12.5K |
|
|
TVTY
1945
CALL
DELISTED
Tivity Health, Inc. Common Stock
TVTY
| $1.06M | ﹤0.01% |
607
+512
| +539% | +$10.9K |
|
1946
PUT
Celanese
CE
$5.09B
| $1.06M | ﹤0.01% |
108
+71
| +192% | +$6.98K |
|
1947
EQT Corp
EQT
$33.2B
| $1.06M | ﹤0.01% |
51,317
+24,460
| +91% | +$478K |
|
1948
PUT
Grand Canyon Education
LOPE
$3.71B
| $1.06M | ﹤0.01% |
93
+12
| +15% | +$1.24K |
|
1949
PUT
Shake Shack
SHAK
$2.3B
| $1.06M | ﹤0.01% |
180
-34
| -16% | -$1.74K |
|
1950
PUT
Sunoco
SUN
$14.2B
| $1.06M | ﹤0.01% |
341
+203
| +147% | +$6.04K |
|
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.