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 |
Amazon
AMZN
|
+$45.9M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$30.1M |
| 3 |
TWX
Time Warner Inc
TWX
|
+$25.8M |
| 4 |
Booking.com
BKNG
|
+$22.5M |
| 5 |
Alphabet (Google) Class C
GOOG
|
+$17.7M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$43.6M |
| 2 |
Amgen
AMGN
|
+$33.2M |
| 3 |
Baidu
BIDU
|
+$19.3M |
| 4 |
Alphabet (Google) Class A
GOOGL
|
+$17.3M |
| 5 |
Micron Technology
MU
|
+$17.1M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 14.31% |
| 2 | Technology | 13.17% |
| 3 | Communication Services | 11.81% |
| 4 | Healthcare | 4.06% |
| 5 | Financials | 3.84% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
COUP
1026
DELISTED
Coupa Software Incorporated
COUP
| $263K | 0.01% |
+8,446
| New | +$258K |
|
1027
PUT
Devon Energy
DVN
$52.2B
| $261K | 0.01% |
1,016
-91
| -8% | -$2.95K |
|
1028
CALL
L3Harris
LHX
$55.8B
| $261K | 0.01% |
577
+437
| +312% | +$52.4K |
|
1029
PUT
Philip Morris
PM
$298B
| $261K | 0.01% |
2,111
-391
| -16% | -$45.5K |
|
1030
Ventas
VTR
$47.6B
| $261K | 0.01% |
+4,019
| New | +$271K |
|
1031
Cboe Global Markets
CBOE
$29.8B
| $260K | 0.01% |
2,422
-4,703
| -66% | -$463K |
|
1032
Hyatt Hotels
H
$17.3B
| $260K | 0.01% |
4,211
-10,531
| -71% | -$609K |
|
1033
PUT
Illumina
ILMN
$29.8B
| $260K | 0.01% |
407
+53
| +15% | +$9.87K |
|
1034
Liberty Latin America Class A
LILA
$1.5B
| $260K | 0.01% |
17,123
+2,411
| +16% | +$39K |
|
1035
CALL
Eli Lilly
LLY
$1.06T
| $260K | 0.01% |
793
-68
| -8% | -$5.58K |
|
1036
CALL
Rush Enterprises Class A
RUSHA
$5.93B
| $260K | 0.01% |
803
+654
| +439% | +$11.7K |
|
|
EMWP
1037
CALL
DELISTED
Eros Media World PLC
EMWP
| $259K | 0.01% |
39
+37
| +1,850% | +$8.29K |
|
1038
CALL
Autohome
ATHM
$2.45B
| $256K | 0.01% |
163
-199
| -55% | -$11.4K |
|
1039
CALL
Halozyme
HALO
$9.59B
| $256K | 0.01% |
871
-389
| -31% | -$5.27K |
|
1040
QuidelOrtho
QDEL
$1.13B
| $256K | 0.01% |
5,845
+5,457
| +1,406% | +$190K |
|
1041
CALL
Bath & Body Works
BBWI
$3.9B
| $255K | 0.01% |
1,363
-361
| -21% | -$12.1K |
|
1042
PUT
Morgan Stanley
MS
$338B
| $255K | 0.01% |
2,983
-2,689
| -47% | -$125K |
|
1043
Wabtec
WAB
$50.3B
| $254K | 0.01% |
+3,366
| New | +$259K |
|
1044
PUT
Invesco CurrencyShares Euro Currency Trust
FXE
$331M
| $252K | 0.01% |
1,269
+375
| +42% | +$42.6K |
|
1045
Assembly Biosciences
ASMB
$500M
| $251K | 0.01% |
599
-436
| -42% | -$134K |
|
1046
PUT
Occidental Petroleum
OXY
$57.3B
| $251K | 0.01% |
970
-201
| -17% | -$12.2K |
|
1047
Texas Capital Bancshares
TCBI
$4.31B
| $251K | 0.01% |
2,936
+2,873
| +4,560% | +$223K |
|
1048
CALL
McKesson
MCK
$96.5B
| $250K | 0.01% |
641
+307
| +92% | +$47.9K |
|
1049
United States Gasoline Fund
UGA
$144M
| $250K | 0.01% |
+8,890
| New | +$239K |
|
|
NETI
1050
DELISTED
Eneti Inc.
NETI
| $249K | 0.01% |
3,809
-7,824
| -67% | -$542K |
|
Similar funds
Simplex Trading's Q3 2017 Portfolio in Review
As of Q3 2017, Simplex Trading held 7,357 positions worth $2.45B, up 6.4% from $2.3B the previous quarter. Its ten largest holdings account for 24% of the portfolio.
Simplex Trading's Q3 2017 filing shows 1,313 new, 2,078 increased, 2,339 reduced and 1,500 closed positions. Its largest new stake was iShares Russell 2000 ETF: 214,170 shares worth $31.7M. The largest sale was State Street SPDR S&P 500 ETF Trust, an estimated $43.6M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 14% of assets, up from 9.7% a quarter earlier, followed by Technology and Communication Services.
- Simplex Trading's largest Q3 2017 buy was iShares Russell 2000 ETF: 214,170 shares worth $31.7M.
- Simplex Trading added most to Amazon in Q3 2017, an estimated $45.9M increase.
- Simplex Trading's biggest Q3 2017 reduction was Baidu, cutting an estimated $19.3M.
- Simplex Trading fully exited State Street SPDR S&P 500 ETF Trust in Q3 2017, selling an estimated $43.6M.
- Simplex Trading's ten largest holdings make up 24% of its $2.45B portfolio in Q3 2017.
- Simplex Trading opened 1,313 new positions and closed 1,500 in Q3 2017.
- Simplex Trading's portfolio value rose 6.4% quarter-over-quarter to $2.45B.
Based on Simplex Trading's 13F filing for Q3 2017, filed 25 Oct 2017.