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
|
+$83.1M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$37.2M |
| 3 |
Amgen
AMGN
|
+$30.5M |
| 4 |
Micron Technology
MU
|
+$28.8M |
| 5 |
Qualcomm
QCOM
|
+$18.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$29.5M |
| 2 |
Goldman Sachs
GS
|
+$27.8M |
| 3 |
Gilead Sciences
GILD
|
+$27.6M |
| 4 |
Booking.com
BKNG
|
+$25.4M |
| 5 |
AT&T
T
|
+$19.6M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 13.55% |
| 2 | Communication Services | 11.57% |
| 3 | Consumer Discretionary | 9.69% |
| 4 | Healthcare | 7.28% |
| 5 | Financials | 4.17% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1101
CALL
Texas Instruments
TXN
$260B
| $234K | 0.01% |
2,042
-310
| -13% | -$24.9K |
|
|
ZAYO
1102
DELISTED
Zayo Group Holdings, Inc.
ZAYO
| $234K | 0.01% |
7,595
-18,363
| -71% | -$601K |
|
1103
Edison International
EIX
$30.6B
| $233K | 0.01% |
+2,982
| New | +$239K |
|
1104
IPG Photonics
IPGP
$4.09B
| $233K | 0.01% |
1,611
-2,823
| -64% | -$379K |
|
1105
Red Robin
RRGB
$132M
| $233K | 0.01% |
+3,581
| New | +$227K |
|
1106
CALL
Yum! Brands
YUM
$40.6B
| $233K | 0.01% |
822
-55
| -6% | -$3.83K |
|
1107
PUT
EOG Resources
EOG
$77.5B
| $232K | 0.01% |
968
+256
| +36% | +$23.6K |
|
|
SWFT
1108
CALL
DELISTED
Swift Transportation Company
SWFT
| $232K | 0.01% |
650
+501
| +336% | +$12.1K |
|
1109
Ericsson
ERIC
$30.6B
| $231K | 0.01% |
32,287
-525
| -2% | -$3.56K |
|
|
JWN
1110
PUT
DELISTED
Nordstrom
JWN
| $231K | 0.01% |
922
+89
| +11% | +$4.05K |
|
1111
CALL
McKesson
MCK
$96.5B
| $231K | 0.01% |
334
+76
| +29% | +$11.5K |
|
1112
Robert Half
RHI
$3.87B
| $230K | 0.01% |
+4,812
| New | +$225K |
|
|
CZR
1113
CALL
DELISTED
Caesars Entertainment Corporation
CZR
| $230K | 0.01% |
1,146
+947
| +476% | +$10.6K |
|
1114
PUT
Herbalife
HLF
$1.22B
| $229K | 0.01% |
5,178
+190
| +4% | +$6.4K |
|
1115
PUT
Coca-Cola
KO
$349B
| $229K | 0.01% |
3,180
+1,688
| +113% | +$74.6K |
|
1116
CALL
Shopify
SHOP
$145B
| $229K | 0.01% |
8,560
+4,040
| +89% | +$34.2K |
|
|
SHLD
1117
CALL
DELISTED
Sears Holding Corporation
SHLD
| $229K | 0.01% |
2,263
+827
| +58% | +$7.73K |
|
|
WEB
1118
CALL
DELISTED
Web.com Group, Inc.
WEB
| $229K | 0.01% |
+571
| New | +$12.1K |
|
|
ESV
1119
PUT
DELISTED
Ensco Rowan plc
ESV
| $229K | 0.01% |
87
+46
| +112% | +$1.32K |
|
1120
PUT
Applied Optoelectronics
AAOI
$8.99B
| $227K | 0.01% |
1,961
+1,385
| +240% | +$80.9K |
|
1121
CALL
Energy Transfer Partners
ET
$70.3B
| $227K | 0.01% |
2,898
-875
| -23% | -$15.6K |
|
1122
TD Synnex
SNX
$19.8B
| $227K | 0.01% |
3,798
-262
| -6% | -$14.7K |
|
|
SBNY
1123
DELISTED
Signature Bank
SBNY
| $227K | 0.01% |
1,588
-8
| -0.5% | -$1.13K |
|
1124
PUT
Perrigo
PRGO
$1.4B
| $226K | 0.01% |
307
+4
| +1% | +$287 |
|
|
ATHN
1125
CALL
DELISTED
Athenahealth, Inc.
ATHN
| $226K | 0.01% |
146
+34
| +30% | +$4.25K |
|
Similar funds
Simplex Trading's Q2 2017 Portfolio in Review
As of Q2 2017, Simplex Trading held 7,527 positions worth $2.3B, down 0.39% from $2.31B the previous quarter. Its ten largest holdings account for 23% of the portfolio.
Simplex Trading withdrew a net $114M in Q2 2017, closing 1,474 positions and reducing 2,320 holdings. Its most notable exit was AT&T, an estimated $19.6M position sold in full.
By sector, the portfolio is most concentrated in Technology at 14% of assets, up from 9.7% a quarter earlier, followed by Communication Services and Consumer Discretionary.
Against the trend, Simplex Trading opened a new position in Amgen worth $32.3M.
- Simplex Trading's largest Q2 2017 buy was Amgen: 187,633 shares worth $32.3M.
- Simplex Trading added most to Amazon in Q2 2017, an estimated $83.1M increase.
- Simplex Trading's biggest Q2 2017 reduction was State Street SPDR S&P 500 ETF Trust, cutting an estimated $29.5M.
- Simplex Trading fully exited AT&T in Q2 2017, selling an estimated $19.6M.
- Simplex Trading's ten largest holdings make up 23% of its $2.3B portfolio in Q2 2017.
- Simplex Trading opened 1,408 new positions and closed 1,474 in Q2 2017.
- Simplex Trading's portfolio value fell 0.39% quarter-over-quarter to $2.3B.
Based on Simplex Trading's 13F filing for Q2 2017, filed 12 Jul 2017.