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 | |
|---|---|---|---|---|---|---|
1826
PUT
CDW
CDW
$17.1B
| $1.12M | ﹤0.01% |
91
+48
| +112% | +$5.5K |
|
1827
CALL
Brookfield
BN
$102B
| $1.12M | ﹤0.01% |
852
+591
| +226% | +$10.7K |
|
|
UNIT
1828
CALL
Uniti Group
UNIT
$2.63B
| $1.11M | ﹤0.01% |
1,434
+231
| +19% | +$1.92K |
|
1829
CALL
Omnicell
OMCL
$1.86B
| $1.11M | ﹤0.01% |
154
+142
| +1,183% | +$10.4K |
|
1830
PUT
Philips
PHG
$25.4B
| $1.11M | ﹤0.01% |
303
-120
| -28% | -$4.42K |
|
1831
PUT
Sibanye-Stillwater
SBSW
$5.92B
| $1.11M | ﹤0.01% |
2,059
+1,857
| +919% | +$9.47K |
|
1832
PUT
CRISPR Therapeutics
CRSP
$4.58B
| $1.11M | ﹤0.01% |
271
-7
| -3% | -$334 |
|
|
RUTH
1833
CALL
DELISTED
Ruth's Hospitality Group, Inc.
RUTH
| $1.11M | ﹤0.01% |
544
+103
| +23% | +$2.15K |
|
1834
CRA International
CRAI
$1.1B
| $1.11M | ﹤0.01% |
26,424
+3,128
| +13% | +$127K |
|
1835
CALL
National Beverage
FIZZ
$2.87B
| $1.11M | ﹤0.01% |
500
-168
| -25% | -$3.63K |
|
1836
CALL
Simpson Manufacturing
SSD
$7.98B
| $1.11M | ﹤0.01% |
+160
| New | +$10.4K |
|
1837
CALL
Coty
COTY
$2.33B
| $1.11M | ﹤0.01% |
1,053
-305
| -22% | -$3.16K |
|
1838
CALL
Upbound Group
UPBD
$1.19B
| $1.11M | ﹤0.01% |
429
+261
| +155% | +$6.85K |
|
|
GMS
1839
PUT
DELISTED
GMS Inc
GMS
| $1.1M | ﹤0.01% |
385
+354
| +1,142% | +$8.67K |
|
1840
PUT
M&T Bank
MTB
$36.2B
| $1.1M | ﹤0.01% |
70
+50
| +250% | +$7.87K |
|
|
PVTL
1841
PUT
DELISTED
Pivotal Software, Inc.
PVTL
| $1.1M | ﹤0.01% |
741
+698
| +1,623% | +$8.54K |
|
1842
CALL
Delek US
DK
$3.87B
| $1.1M | ﹤0.01% |
304
+51
| +20% | +$1.88K |
|
1843
PUT
WD-40
WDFC
$3.1B
| $1.1M | ﹤0.01% |
60
+9
| +18% | +$1.62K |
|
1844
Green Plains
GPRE
$1.19B
| $1.1M | ﹤0.01% |
103,879
+88,172
| +561% | +$843K |
|
1845
PUT
Darden Restaurants
DRI
$22.5B
| $1.1M | ﹤0.01% |
93
-69
| -43% | -$8.42K |
|
|
VISN
1846
CALL
Vistance Networks Inc
VISN
$2.66B
| $1.1M | ﹤0.01% |
934
+314
| +51% | +$4.04K |
|
1847
CALL
Champion Homes
SKY
$4.48B
| $1.1M | ﹤0.01% |
365
+251
| +220% | +$7.26K |
|
|
BFYT
1848
DELISTED
Benefytt Technologies, Inc. Class A Common Stock
BFYT
| $1.1M | ﹤0.01% |
44,057
+33,238
| +307% | +$698K |
|
|
AERI
1849
CALL
DELISTED
Aerie Pharmaceuticals
AERI
| $1.1M | ﹤0.01% |
571
+549
| +2,495% | +$12.6K |
|
|
MDR
1850
PUT
DELISTED
McDermott International
MDR
| $1.1M | ﹤0.01% |
5,437
+4,220
| +347% | +$25.9K |
|
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.