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 | |
|---|---|---|---|---|---|---|
|
NOAH
1876
Noah Holdings
NOAH
$588M
| $1.07M | ﹤0.01% |
+36,716
| New | +$1.17M |
|
1877
PUT
Textron
TXT
$16.6B
| $1.07M | ﹤0.01% |
219
| – | – |
|
1878
MGM Resorts International
MGM
$11.7B
| $1.07M | ﹤0.01% |
+38,651
| New | +$1.11M |
|
|
NVO
1879
Novo Nordisk
NVO
$216B
| $1.07M | ﹤0.01% |
+41,408
| New | +$1.05M |
|
1880
CALL
Martin Marietta Materials
MLM
$33.6B
| $1.07M | ﹤0.01% |
39
-25
| -39% | -$6.18K |
|
1881
PUT
Euronet Worldwide
EEFT
$3.02B
| $1.07M | ﹤0.01% |
73
-130
| -64% | -$20.1K |
|
1882
PUT
Regions Financial
RF
$26.3B
| $1.07M | ﹤0.01% |
675
-1,843
| -73% | -$27.9K |
|
|
BBBY
1883
DELISTED
Bed Bath & Beyond Inc
BBBY
| $1.06M | ﹤0.01% |
+100,015
| New | +$965K |
|
1884
PUT
GoDaddy
GDDY
$12.3B
| $1.06M | ﹤0.01% |
161
+40
| +33% | +$2.71K |
|
|
SDC
1885
CALL
DELISTED
SmileDirectClub, Inc. Class A Common Stock
SDC
| $1.06M | ﹤0.01% |
+765
| New | +$12.8K |
|
1886
PUT
First Bancorp
FBP
$4.4B
| $1.06M | ﹤0.01% |
1,063
+1,040
| +4,522% | +$10.6K |
|
1887
CALL
Keysight
KEYS
$54.5B
| $1.06M | ﹤0.01% |
109
-368
| -77% | -$34.1K |
|
1888
NovoCure
NVCR
$2.04B
| $1.06M | ﹤0.01% |
14,177
-4,090
| -22% | -$327K |
|
|
ESPR
1889
PUT
DELISTED
Esperion Therapeutics
ESPR
| $1.06M | ﹤0.01% |
289
-12
| -4% | -$475 |
|
1890
iShares Russell 2000 Value ETF
IWN
$14.4B
| $1.06M | ﹤0.01% |
8,872
-6,156
| -41% | -$727K |
|
|
HES
1891
DELISTED
Hess
HES
| $1.06M | ﹤0.01% |
+17,472
| New | +$1.09M |
|
1892
Lamar Advertising Co
LAMR
$16.2B
| $1.06M | ﹤0.01% |
12,899
+10,227
| +383% | +$807K |
|
1893
PUT
Visteon
VC
$2.77B
| $1.06M | ﹤0.01% |
128
+4
| +3% | +$267 |
|
1894
CALL
Alcon
ALC
$33.1B
| $1.05M | ﹤0.01% |
181
+146
| +417% | +$8.76K |
|
1895
PUT
Coherent
COHR
$55.2B
| $1.05M | ﹤0.01% |
300
+191
| +175% | +$7.28K |
|
1896
PUT
Interactive Brokers
IBKR
$40.9B
| $1.05M | ﹤0.01% |
784
-804
| -51% | -$10K |
|
|
HI
1897
CALL
DELISTED
Hillenbrand
HI
| $1.05M | ﹤0.01% |
341
+90
| +36% | +$2.85K |
|
|
HOME
1898
CALL
DELISTED
At Home Group Inc.
HOME
| $1.05M | ﹤0.01% |
1,094
+868
| +384% | +$5.93K |
|
|
DISH
1899
DELISTED
DISH Network Corp.
DISH
| $1.05M | ﹤0.01% |
30,875
-26,345
| -46% | -$943K |
|
1900
CALL
Arrowhead Research
ARWR
$12.1B
| $1.05M | ﹤0.01% |
372
+40
| +12% | +$1.18K |
|
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.