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 | |
|---|---|---|---|---|---|---|
1901
CALL
LPL Financial
LPLA
$26.3B
| $1.05M | ﹤0.01% |
128
-238
| -65% | -$19K |
|
1902
CALL
Omega Healthcare
OHI
$15.4B
| $1.05M | ﹤0.01% |
251
-38
| -13% | -$1.48K |
|
1903
PUT
Upland Software
UPLD
$12M
| $1.04M | ﹤0.01% |
30
+26
| +650% | +$10.8K |
|
1904
PUT
Dillards
DDS
$8.87B
| $1.04M | ﹤0.01% |
158
+119
| +305% | +$7.61K |
|
|
SGI
1905
PUT
Somnigroup International
SGI
$15.1B
| $1.04M | ﹤0.01% |
540
+308
| +133% | +$5.91K |
|
|
ESPR
1906
CALL
DELISTED
Esperion Therapeutics
ESPR
| $1.04M | ﹤0.01% |
284
+191
| +205% | +$7.57K |
|
1907
EQT Corp
EQT
$33.2B
| $1.04M | ﹤0.01% |
97,821
+81,335
| +493% | +$1.05M |
|
1908
PUT
Howmet Aerospace
HWM
$116B
| $1.04M | ﹤0.01% |
522
+213
| +69% | +$4.2K |
|
1909
PUT
Alaska Air
ALK
$5.15B
| $1.04M | ﹤0.01% |
160
-23
| -13% | -$1.45K |
|
1910
CALL
WEC Energy
WEC
$37.7B
| $1.04M | ﹤0.01% |
109
+103
| +1,717% | +$9.28K |
|
1911
PUT
IDEX
IEX
$16.5B
| $1.03M | ﹤0.01% |
+63
| New | +$10.5K |
|
1912
PUT
Teradata
TDC
$2.68B
| $1.03M | ﹤0.01% |
333
+29
| +10% | +$978 |
|
1913
Ashland
ASH
$3.04B
| $1.03M | ﹤0.01% |
13,351
-3,720
| -22% | -$283K |
|
1914
PUT
Standex International
SXI
$3.68B
| $1.03M | ﹤0.01% |
141
+135
| +2,250% | +$9.36K |
|
|
MOMO
1915
Hello Group
MOMO
$869M
| $1.02M | ﹤0.01% |
33,077
+19,321
| +140% | +$656K |
|
1916
CALL
Editas Medicine
EDIT
$399M
| $1.02M | ﹤0.01% |
450
-113
| -20% | -$2.8K |
|
1917
CALL
Kinsale Capital Group
KNSL
$7.95B
| $1.02M | ﹤0.01% |
99
+19
| +24% | +$1.82K |
|
1918
PUT
West Pharmaceutical
WST
$23.1B
| $1.02M | ﹤0.01% |
72
-41
| -36% | -$5.64K |
|
1919
CALL
Flex
FLEX
$43.4B
| $1.02M | ﹤0.01% |
1,294
+1,031
| +392% | +$7.92K |
|
1920
CALL
MillerKnoll
MLKN
$1.5B
| $1.02M | ﹤0.01% |
221
+135
| +157% | +$5.93K |
|
|
HBI
1921
PUT
DELISTED
Hanesbrands
HBI
| $1.02M | ﹤0.01% |
664
+144
| +28% | +$2.19K |
|
1922
CALL
Nokia
NOK
$50.8B
| $1.02M | ﹤0.01% |
2,009
+962
| +92% | +$4.96K |
|
1923
CALL
Vermilion Energy
VET
$1.73B
| $1.01M | ﹤0.01% |
606
+535
| +754% | +$9.29K |
|
|
ALDR
1924
CALL
DELISTED
Alder Biopharmaceuticals
ALDR
| $1.01M | ﹤0.01% |
537
+501
| +1,392% | +$5.73K |
|
1925
CALL
HealthEquity
HQY
$7.91B
| $1.01M | ﹤0.01% |
177
-136
| -43% | -$9.03K |
|
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.