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 | |
|---|---|---|---|---|---|---|
951
Automatic Data Processing
ADP
$96.7B
| $303K | 0.01% |
+2,777
| New | +$297K |
|
952
PUT
BlackBerry
BB
$5.08B
| $302K | 0.01% |
1,371
-159
| -10% | -$1.5K |
|
953
PUT
Deere & Co
DE
$165B
| $302K | 0.01% |
2,628
-133
| -5% | -$16.4K |
|
|
RDUS
954
DELISTED
Radius Health, Inc.
RDUS
| $302K | 0.01% |
7,841
+5,730
| +271% | +$225K |
|
|
ESRX
955
CALL
DELISTED
Express Scripts Holding Company
ESRX
| $300K | 0.01% |
1,346
-779
| -37% | -$48.4K |
|
956
PUT
Berkshire Hathaway Class B
BRK.B
$1.06T
| $299K | 0.01% |
2,229
-161
| -7% | -$28.5K |
|
957
CALL
Estee Lauder
EL
$28.6B
| $299K | 0.01% |
1,123
+790
| +237% | +$81.1K |
|
958
CALL
Mondelez International
MDLZ
$76.8B
| $298K | 0.01% |
4,319
+1,245
| +41% | +$52.9K |
|
959
Myriad Genetics
MYGN
$539M
| $298K | 0.01% |
8,244
-35,695
| -81% | -$1.02M |
|
960
CALL
Blackrock
BLK
$162B
| $297K | 0.01% |
190
-133
| -41% | -$56.8K |
|
961
Olin
OLN
$2.69B
| $297K | 0.01% |
+8,698
| New | +$271K |
|
962
CALL
Procter & Gamble
PG
$340B
| $297K | 0.01% |
3,372
+1,093
| +48% | +$99.5K |
|
963
State Street SPDR S&P Dividend ETF
SDY
$21.6B
| $297K | 0.01% |
+3,256
| New | +$292K |
|
|
NSM
964
DELISTED
Nationstar Mortgage Holdings
NSM
| $297K | 0.01% |
15,995
+2,664
| +20% | +$46.5K |
|
|
TWX
965
CALL
DELISTED
Time Warner Inc
TWX
| $297K | 0.01% |
1,336
-1,270
| -49% | -$129K |
|
966
CALL
Cigna
CI
$75.7B
| $296K | 0.01% |
275
-155
| -36% | -$27.6K |
|
967
LSB Industries
LXU
$873M
| $294K | 0.01% |
+48,239
| New | +$289K |
|
968
Tronox
TROX
$1.02B
| $294K | 0.01% |
13,962
+3,341
| +31% | +$66.3K |
|
|
LNCE
969
DELISTED
Snyders-Lance, Inc.
LNCE
| $294K | 0.01% |
7,729
+6,072
| +366% | +$219K |
|
|
REN
970
DELISTED
Resolute Energy Corporaton
REN
| $293K | 0.01% |
9,876
-19,301
| -66% | -$573K |
|
971
Abeona Therapeutics
ABEO
$362M
| $292K | 0.01% |
685
+488
| +248% | +$131K |
|
972
Adecoagro
AGRO
$1.56B
| $292K | 0.01% |
27,110
+12,595
| +87% | +$126K |
|
973
PUT
Target
TGT
$61.1B
| $291K | 0.01% |
1,688
+240
| +17% | +$13.4K |
|
|
UFS
974
DELISTED
DOMTAR CORPORATION (New)
UFS
| $291K | 0.01% |
6,722
-1,103
| -14% | -$44K |
|
|
TRCO
975
DELISTED
TRIBUNE MEDIA COMPANY CLASS A
TRCO
| $291K | 0.01% |
7,124
-4,124
| -37% | -$168K |
|
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.