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 | |
|---|---|---|---|---|---|---|
2126
CALL
Virtu Financial
VIRT
$5.2B
| $66K | ﹤0.01% |
399
+226
| +131% | +$3.68K |
|
2127
Vanguard Growth ETF
VUG
$216B
| $66K | ﹤0.01% |
3,150
+2,940
| +1,400% | +$61.6K |
|
2128
CALL
Zimmer Biomet
ZBH
$17.7B
| $66K | ﹤0.01% |
80
-263
| -77% | -$31.2K |
|
|
LL
2129
PUT
DELISTED
LL Flooring Holdings, Inc.
LL
| $66K | ﹤0.01% |
406
+241
| +146% | +$6.05K |
|
|
NYMX
2130
PUT
DELISTED
Nymox Pharmaceutical Corp
NYMX
| $66K | ﹤0.01% |
1,291
-337
| -21% | -$1.38K |
|
|
XONE
2131
PUT
DELISTED
The ExOne Company
XONE
| $66K | ﹤0.01% |
224
+213
| +1,936% | +$2.52K |
|
|
WES
2132
PUT
DELISTED
Western Gas Partners Lp
WES
| $66K | ﹤0.01% |
51
-53
| -51% | -$3.01K |
|
2133
PUT
First Majestic Silver
AG
$8.05B
| $65K | ﹤0.01% |
1,068
+887
| +490% | +$7.46K |
|
2134
CALL
Cboe Global Markets
CBOE
$29.8B
| $65K | ﹤0.01% |
86
-136
| -61% | -$11.6K |
|
2135
Constellium
CSTM
$3.96B
| $65K | ﹤0.01% |
+9,484
| New | +$61.8K |
|
2136
CALL
Carvana
CVNA
$43.3B
| $65K | ﹤0.01% |
+375
| New | +$1.03K |
|
2137
PUT
Goodyear
GT
$2.07B
| $65K | ﹤0.01% |
1,003
+400
| +66% | +$13.8K |
|
2138
Jones Lang LaSalle
JLL
$15.1B
| $65K | ﹤0.01% |
521
-168
| -24% | -$19.3K |
|
2139
CALL
Nutanix
NTNX
$14.9B
| $65K | ﹤0.01% |
392
+177
| +82% | +$3.09K |
|
2140
PUT
Bank OZK
OZK
$5.49B
| $65K | ﹤0.01% |
214
+146
| +215% | +$6.94K |
|
2141
CALL
Banco Santander
SAN
$194B
| $65K | ﹤0.01% |
715
+281
| +65% | +$1.75K |
|
2142
PUT
Tenet Healthcare
THC
$20.1B
| $65K | ﹤0.01% |
885
-1,060
| -54% | -$18.5K |
|
2143
CALL
Upbound Group
UPBD
$1.19B
| $65K | ﹤0.01% |
163
+10
| +7% | +$113 |
|
2144
Invesco DB US Dollar Index Bullish Fund
UUP
$434M
| $65K | ﹤0.01% |
2,627
-15,444
| -85% | -$392K |
|
2145
CALL
Valmont Industries
VMI
$9.44B
| $65K | ﹤0.01% |
153
+141
| +1,175% | +$21.2K |
|
|
NM
2146
PUT
DELISTED
Navios Maritime Holdings Inc.
NM
| $65K | ﹤0.01% |
51
+21
| +70% | +$308 |
|
|
EMAN
2147
DELISTED
eMagin Corporation
EMAN
| $65K | ﹤0.01% |
26,853
+21,889
| +441% | +$53.9K |
|
|
AUY
2148
PUT
DELISTED
Yamana Gold, Inc.
AUY
| $65K | ﹤0.01% |
1,221
+1,062
| +668% | +$2.87K |
|
|
CNCE
2149
DELISTED
Concert Pharmaceuticals, Inc.
CNCE
| $65K | ﹤0.01% |
4,680
+3,217
| +220% | +$47.4K |
|
|
ABMD
2150
DELISTED
Abiomed Inc
ABMD
| $65K | ﹤0.01% |
454
-11,509
| -96% | -$1.55M |
|
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.