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 | |
|---|---|---|---|---|---|---|
3151
Allot
ALLT
$378M
| $23K | ﹤0.01% |
+4,507
| New | +$22K |
|
|
ARR
3152
CALL
Armour Residential REIT
ARR
$2.03B
| $23K | ﹤0.01% |
65
+50
| +333% | +$6.29K |
|
3153
Calix
CALX
$2.28B
| $23K | ﹤0.01% |
3,413
+1,408
| +70% | +$9.54K |
|
3154
Cintas
CTAS
$83.8B
| $23K | ﹤0.01% |
+748
| New | +$23.3K |
|
3155
CALL
Cytosorbents Corp
CTSO
$23.5M
| $23K | ﹤0.01% |
505
+333
| +194% | +$1.46K |
|
3156
CALL
China Yuchai International
CYD
$1.75B
| $23K | ﹤0.01% |
142
+45
| +46% | +$808 |
|
3157
PUT
Ethan Allen Interiors
ETD
$591M
| $23K | ﹤0.01% |
+439
| New | +$12.9K |
|
3158
PUT
FirstEnergy
FE
$28.8B
| $23K | ﹤0.01% |
471
+205
| +77% | +$6.09K |
|
3159
CALL
GATX Corp
GATX
$6.54B
| $23K | ﹤0.01% |
144
-74
| -34% | -$4.53K |
|
3160
PUT
Genworth Financial
GNW
$3.82B
| $23K | ﹤0.01% |
318
+62
| +24% | +$235 |
|
3161
CALL
GoPro
GPRO
$120M
| $23K | ﹤0.01% |
1,767
-145
| -8% | -$1.23K |
|
3162
CALL
Helmerich & Payne
HP
$3.43B
| $23K | ﹤0.01% |
420
+320
| +320% | +$18.8K |
|
3163
PUT
Insmed
INSM
$23.1B
| $23K | ﹤0.01% |
371
-364
| -50% | -$6.22K |
|
3164
PUT
Mercer International
MERC
$44.1M
| $23K | ﹤0.01% |
+200
| New | +$2.31K |
|
3165
CALL
Motorola Solutions
MSI
$70.3B
| $23K | ﹤0.01% |
116
+9
| +8% | +$764 |
|
3166
PUT
Nokia
NOK
$50.5B
| $23K | ﹤0.01% |
231
-41
| -15% | -$246 |
|
3167
PUT
PACCAR
PCAR
$69.9B
| $23K | ﹤0.01% |
806
+446
| +124% | +$19.3K |
|
3168
CALL
Prothena Corp
PRTA
$461M
| $23K | ﹤0.01% |
83
-22
| -21% | -$1.17K |
|
|
SCS
3169
PUT
DELISTED
Steelcase
SCS
| $23K | ﹤0.01% |
210
+99
| +89% | +$1.63K |
|
3170
CALL
Titan Machinery
TITN
$468M
| $23K | ﹤0.01% |
116
-36
| -24% | -$592 |
|
3171
CALL
Trane Technologies
TT
$106B
| $23K | ﹤0.01% |
99
-207
| -68% | -$18.2K |
|
|
TWO
3172
CALL
Two Harbors Investment
TWO
$1.27B
| $23K | ﹤0.01% |
+126
| New | +$10.1K |
|
3173
CVR Partners
UAN
$1.28B
| $23K | ﹤0.01% |
675
+477
| +241% | +$20.8K |
|
3174
CALL
VirnetX Holding Corp
VHC
$52.4M
| $23K | ﹤0.01% |
26
+25
| +2,500% | +$1.81K |
|
3175
Vanguard FTSE Pacific ETF
VPL
$8.05B
| $23K | ﹤0.01% |
+351
| New | +$22.7K |
|
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.