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 |
Alibaba
BABA
|
+$50.3M |
| 2 |
Boeing
BA
|
+$24.3M |
| 3 |
SPDR Gold Trust
GLD
|
+$18.3M |
| 4 |
Biogen
BIIB
|
+$15.9M |
| 5 |
FedEx
FDX
|
+$15.1M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Alphabet (Google) Class C
GOOG
|
+$60.3M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$36.4M |
| 3 |
Netflix
NFLX
|
+$19M |
| 4 |
State Street Industrial Select Sector SPDR ETF
XLI
|
+$17.3M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$14.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 0.49% |
| 2 | Technology | 0.48% |
| 3 | Healthcare | 0.35% |
| 4 | Industrials | 0.35% |
| 5 | Communication Services | 0.21% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1851
CALL
CDW
CDW
$17.1B
| $1.1M | ﹤0.01% |
89
+14
| +19% | +$1.6K |
|
|
CRON
1852
PUT
Cronos Group
CRON
$1.05B
| $1.09M | ﹤0.01% |
1,209
-229
| -16% | -$2.93K |
|
1853
PUT
Encompass Health
EHC
$11.2B
| $1.09M | ﹤0.01% |
217
-26
| -11% | -$1.31K |
|
1854
CALL
Flowserve
FLS
$9.25B
| $1.09M | ﹤0.01% |
234
+207
| +767% | +$9.77K |
|
1855
CALL
Fair Isaac
FICO
$28.7B
| $1.09M | ﹤0.01% |
36
-21
| -37% | -$7.11K |
|
1856
PUT
Toll Brothers
TOL
$14B
| $1.09M | ﹤0.01% |
266
-408
| -61% | -$15K |
|
1857
PUT
SLM Corp
SLM
$4.57B
| $1.09M | ﹤0.01% |
+1,235
| New | +$11.1K |
|
1858
PUT
Dana Inc
DAN
$2.91B
| $1.09M | ﹤0.01% |
753
-122
| -14% | -$1.9K |
|
1859
PUT
Flex
FLEX
$43.4B
| $1.09M | ﹤0.01% |
1,377
-274
| -17% | -$2.11K |
|
|
GOOS
1860
CALL
Canada Goose Holdings
GOOS
$868M
| $1.09M | ﹤0.01% |
247
-200
| -45% | -$8.36K |
|
1861
PUT
BioMarin Pharmaceuticals
BMRN
$11.5B
| $1.08M | ﹤0.01% |
161
-114
| -41% | -$8.78K |
|
1862
Keysight
KEYS
$54.5B
| $1.08M | ﹤0.01% |
+11,146
| New | +$1.03M |
|
1863
CALL
World Acceptance Corp
WRLD
$950M
| $1.08M | ﹤0.01% |
85
+83
| +4,150% | +$11.7K |
|
1864
PUT
FirstEnergy
FE
$28.9B
| $1.08M | ﹤0.01% |
224
+104
| +87% | +$4.71K |
|
1865
TechnipFMC
FTI
$30.6B
| $1.08M | ﹤0.01% |
60,090
+58,324
| +3,303% | +$1.09M |
|
1866
CALL
Monster Beverage
MNST
$91.4B
| $1.08M | ﹤0.01% |
372
+156
| +72% | +$4.73K |
|
1867
PUT
Omega Healthcare
OHI
$15.4B
| $1.08M | ﹤0.01% |
258
+56
| +28% | +$2.18K |
|
1868
Healthpeak Properties
DOC
$15.4B
| $1.08M | ﹤0.01% |
30,205
+28,476
| +1,647% | +$961K |
|
1869
CALL
East-West Bancorp
EWBC
$17.9B
| $1.08M | ﹤0.01% |
243
+148
| +156% | +$6.5K |
|
1870
Eagle Materials
EXP
$6.6B
| $1.08M | ﹤0.01% |
11,956
-9,480
| -44% | -$813K |
|
1871
CALL
State Street SPDR Portfolio Europe ETF
SPEU
$712M
| $1.07M | ﹤0.01% |
280
-94
| -25% | -$3.13K |
|
1872
CALL
Fluor
FLR
$7.29B
| $1.07M | ﹤0.01% |
561
+176
| +46% | +$4.2K |
|
1873
Liberty Global Class C
LBTYK
$3.27B
| $1.07M | ﹤0.01% |
45,139
-35,859
| -44% | -$934K |
|
1874
CALL
Lincoln National
LNC
$7.91B
| $1.07M | ﹤0.01% |
178
+61
| +52% | +$3.65K |
|
1875
PUT
Boyd Gaming
BYD
$6.47B
| $1.07M | ﹤0.01% |
448
-281
| -39% | -$7.11K |
|
Similar funds
Simplex Trading's Q3 2019 Portfolio in Review
As of Q3 2019, Simplex Trading held 8,410 positions worth $35.2B, down 4.1% from $36.6B the previous quarter. Its ten largest holdings account for 33% of the portfolio.
Simplex Trading's Q3 2019 filing shows 1,312 new, 3,129 increased, 2,596 reduced and 1,163 closed positions. Its largest new stake was SPDR Gold Trust: 131,281 shares worth $18.2M. The largest sale was Alphabet (Google) Class C, an estimated $60.3M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 0.49% of assets, up from 0.26% a quarter earlier, followed by Technology and Healthcare.
- Simplex Trading's largest Q3 2019 buy was SPDR Gold Trust: 131,281 shares worth $18.2M.
- Simplex Trading added most to Alibaba in Q3 2019, an estimated $50.3M increase.
- Simplex Trading's biggest Q3 2019 reduction was Alphabet (Google) Class C, cutting an estimated $60.3M.
- Simplex Trading fully exited iShares Russell 2000 ETF in Q3 2019, selling an estimated $36.4M.
- Simplex Trading's ten largest holdings make up 33% of its $35.2B portfolio in Q3 2019.
- Simplex Trading opened 1,312 new positions and closed 1,163 in Q3 2019.
- Simplex Trading's portfolio value fell 4.1% quarter-over-quarter to $35.2B.
Based on Simplex Trading's 13F filing for Q3 2019, filed 15 Oct 2019.