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 | |
|---|---|---|---|---|---|---|
3001
CALL
B&G Foods
BGS
$291M
| $351K | ﹤0.01% |
186
+65
| +54% | +$1.25K |
|
3002
CALL
Carlyle Secured Lending
CGBD
$710M
| $351K | ﹤0.01% |
244
+209
| +597% | +$3.07K |
|
3003
CALL
Funko
FNKO
$342M
| $351K | ﹤0.01% |
171
-248
| -59% | -$5.74K |
|
3004
CALL
Hewlett Packard
HPE
$63.8B
| $351K | ﹤0.01% |
232
-422
| -65% | -$6K |
|
3005
Meta Platforms (Facebook)
META
$1.51T
| $351K | ﹤0.01% |
+1,973
| New | +$375K |
|
3006
Children's Place
PLCE
$52.9M
| $351K | ﹤0.01% |
4,562
-1,028
| -18% | -$90.6K |
|
3007
CALL
Invesco S&P SmallCap Low Volatility ETF
XSLV
$248M
| $351K | ﹤0.01% |
125
+108
| +635% | +$5.21K |
|
3008
CALL
Cincinnati Financial
CINF
$28.5B
| $350K | ﹤0.01% |
30
+9
| +43% | +$990 |
|
|
AFTY
3009
PUT
DELISTED
Pacer CSOP FTSE China A50 ETF
AFTY
| $350K | ﹤0.01% |
209
+114
| +120% | +$1.94K |
|
|
AIMT
3010
DELISTED
Aimmune Therapeutics
AIMT
| $350K | ﹤0.01% |
+16,732
| New | +$342K |
|
3011
PUT
Pinnacle West Capital
PNW
$12.8B
| $349K | ﹤0.01% |
36
-63
| -64% | -$5.93K |
|
3012
CALL
ATI
ATI
$26.3B
| $348K | ﹤0.01% |
172
+146
| +562% | +$3.09K |
|
3013
Cheniere Energy
CQP
$30.5B
| $348K | ﹤0.01% |
+7,663
| New | +$340K |
|
3014
CALL
Mativ Holdings
MATV
$455M
| $348K | ﹤0.01% |
93
+52
| +127% | +$1.79K |
|
3015
PUT
Sonic Automotive
SAH
$3.25B
| $348K | ﹤0.01% |
+111
| New | +$3K |
|
3016
PUT
Urban Outfitters
URBN
$6.22B
| $348K | ﹤0.01% |
124
-68
| -35% | -$1.59K |
|
|
ARNA
3017
DELISTED
Arena Pharmaceuticals Inc
ARNA
| $348K | ﹤0.01% |
7,624
+6,997
| +1,116% | +$393K |
|
|
BLD
3018
CALL
DELISTED
TopBuild
BLD
| $347K | ﹤0.01% |
36
-180
| -83% | -$15.9K |
|
3019
Nutrien
NTR
$32.4B
| $347K | ﹤0.01% |
+6,966
| New | +$355K |
|
|
SNBR
3020
PUT
DELISTED
Sleep Number
SNBR
| $347K | ﹤0.01% |
84
+44
| +110% | +$1.88K |
|
3021
Dominion Energy
D
$61.8B
| $346K | ﹤0.01% |
4,281
-70,601
| -94% | -$5.46M |
|
|
MDRX
3022
CALL
DELISTED
Veradigm Inc. Common Stock
MDRX
| $345K | ﹤0.01% |
315
+312
| +10,400% | +$3.2K |
|
|
WUBA
3023
CALL
DELISTED
58.com Inc
WUBA
| $345K | ﹤0.01% |
70
-263
| -79% | -$14.6K |
|
|
GES
3024
CALL
DELISTED
Guess Inc
GES
| $344K | ﹤0.01% |
186
+139
| +296% | +$2.31K |
|
|
GOOS
3025
Canada Goose Holdings
GOOS
$891M
| $344K | ﹤0.01% |
7,829
-18,772
| -71% | -$785K |
|
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.