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 | |
|---|---|---|---|---|---|---|
1701
CALL
Sun Communities
SUI
$15B
| $1.29M | ﹤0.01% |
87
+57
| +190% | +$8.05K |
|
1702
Capri Holdings
CPRI
$1.77B
| $1.29M | ﹤0.01% |
38,875
-6,541
| -14% | -$210K |
|
1703
PUT
DTE Energy
DTE
$31.1B
| $1.29M | ﹤0.01% |
114
+92
| +418% | +$10.2K |
|
1704
PUT
Fortinet
FTNT
$112B
| $1.29M | ﹤0.01% |
840
-985
| -54% | -$16K |
|
|
TSG
1705
PUT
DELISTED
The Stars Group Inc.
TSG
| $1.29M | ﹤0.01% |
861
+311
| +57% | +$4.83K |
|
1706
Snap-on
SNA
$20.9B
| $1.29M | ﹤0.01% |
+8,234
| New | +$1.27M |
|
1707
PUT
STMicroelectronics
STM
$46B
| $1.29M | ﹤0.01% |
666
-34
| -5% | -$624 |
|
1708
PUT
W.P. Carey
WPC
$17.1B
| $1.29M | ﹤0.01% |
147
+135
| +1,125% | +$11.5K |
|
|
CTRA
1709
PUT
DELISTED
Coterra Energy
CTRA
| $1.29M | ﹤0.01% |
733
+243
| +50% | +$4.66K |
|
1710
CALL
Texas Roadhouse
TXRH
$12.7B
| $1.29M | ﹤0.01% |
245
+72
| +42% | +$3.82K |
|
|
STI
1711
PUT
DELISTED
SunTrust Banks, Inc.
STI
| $1.29M | ﹤0.01% |
187
+56
| +43% | +$3.58K |
|
1712
CALL
America Movil
AMX
$78.1B
| $1.28M | ﹤0.01% |
865
+794
| +1,118% | +$11.4K |
|
1713
Canadian Solar
CSIQ
$906M
| $1.28M | ﹤0.01% |
68,029
+21,517
| +46% | +$468K |
|
1714
Fastenal
FAST
$54B
| $1.28M | ﹤0.01% |
+78,550
| New | +$1.22M |
|
1715
PUT
Goodyear
GT
$2.07B
| $1.28M | ﹤0.01% |
890
+481
| +118% | +$6.41K |
|
1716
CALL
Cars.com
CARS
$641M
| $1.28M | ﹤0.01% |
1,426
-95
| -6% | -$1.28K |
|
1717
CALL
Innoviva
INVA
$1.58B
| $1.28M | ﹤0.01% |
1,212
-1,431
| -54% | -$17.1K |
|
1718
PUT
ArcelorMittal
MT
$50.4B
| $1.27M | ﹤0.01% |
895
-48
| -5% | -$737 |
|
1719
CALL
Macerich
MAC
$7.32B
| $1.27M | ﹤0.01% |
403
-209
| -34% | -$6.59K |
|
1720
Freeport-McMoran
FCX
$90B
| $1.27M | ﹤0.01% |
132,774
+79,688
| +150% | +$818K |
|
|
KEM
1721
PUT
DELISTED
KEMET Corporation
KEM
| $1.26M | ﹤0.01% |
694
-153
| -18% | -$2.89K |
|
1722
CALL
Labcorp
LH
$24.3B
| $1.26M | ﹤0.01% |
87
-187
| -68% | -$27.3K |
|
|
RETA
1723
CALL
DELISTED
Reata Pharmaceuticals, Inc. Class A Common Stock
RETA
| $1.26M | ﹤0.01% |
157
+131
| +504% | +$11.1K |
|
|
RDUS
1724
CALL
DELISTED
Radius Health, Inc.
RDUS
| $1.26M | ﹤0.01% |
489
+84
| +21% | +$2.06K |
|
1725
PUT
EQT Corp
EQT
$33.2B
| $1.25M | ﹤0.01% |
1,176
+799
| +212% | +$10.3K |
|
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.