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 | |
|---|---|---|---|---|---|---|
4601
PUT
McEwen Inc
MUX
$1B
| $5K | ﹤0.01% |
5
| – | – |
|
4602
National CineMedia
NCMI
$378M
| $5K | ﹤0.01% |
69
-943
| -93% | -$88.1K |
|
4603
PUT
NN Inc
NNBR
$237M
| $5K | ﹤0.01% |
96
-100
| -51% | -$2.77K |
|
4604
CALL
Nokia
NOK
$46.9B
| $5K | ﹤0.01% |
+130
| New | +$780 |
|
4605
Navigator Holdings
NVGS
$1.35B
| $5K | ﹤0.01% |
+671
| New | +$6.67K |
|
4606
PUT
Owens Corning
OC
$11B
| $5K | ﹤0.01% |
+138
| New | +$8.65K |
|
4607
Oceaneering
OII
$4.64B
| $5K | ﹤0.01% |
+229
| New | +$5.83K |
|
4608
PUT
Oneok
OKE
$56.7B
| $5K | ﹤0.01% |
42
-227
| -84% | -$11.7K |
|
4609
CALL
Option Care Health
OPCH
$3.76B
| $5K | ﹤0.01% |
+28
| New | +$213 |
|
4610
PUT
Progressive
PGR
$128B
| $5K | ﹤0.01% |
194
+175
| +921% | +$7.27K |
|
4611
PUT
Pultegroup
PHM
$25.2B
| $5K | ﹤0.01% |
235
-110
| -32% | -$2.57K |
|
4612
PUT
Photronics
PLAB
$1.65B
| $5K | ﹤0.01% |
+19
| New | +$201 |
|
4613
CALL
Dave & Buster's
PLAY
$357M
| $5K | ﹤0.01% |
25
-40
| -62% | -$2.62K |
|
4614
CALL
Pentair
PNR
$10.8B
| $5K | ﹤0.01% |
33
-25
| -43% | -$1.09K |
|
4615
PUT
PPG Industries
PPG
$24.9B
| $5K | ﹤0.01% |
109
-15
| -12% | -$1.62K |
|
4616
CALL
Restaurant Brands International
QSR
$26.2B
| $5K | ﹤0.01% |
19
-3
| -14% | -$177 |
|
4617
CALL
Ring Energy
REI
$307M
| $5K | ﹤0.01% |
+39
| New | +$486 |
|
4618
PUT
Roper Technologies
ROP
$40.4B
| $5K | ﹤0.01% |
94
-10
| -10% | -$2.21K |
|
4619
PUT
Ryanair
RYAAY
$30B
| $5K | ﹤0.01% |
38
-50
| -57% | -$1.98K |
|
4620
CALL
Rayonier
RYN
$6.67B
| $5K | ﹤0.01% |
197
+18
| +10% | +$464 |
|
|
SA
4621
CALL
Seabridge Gold
SA
$2.72B
| $5K | ﹤0.01% |
194
-149
| -43% | -$1.58K |
|
4622
CALL
Saia
SAIA
$10.5B
| $5K | ﹤0.01% |
+7
| New | +$324 |
|
|
SF
4623
PUT
Stifel
SF
$12.4B
| $5K | ﹤0.01% |
106
-81
| -43% | -$1.66K |
|
4624
PUT
Companhia Siderúrgica Nacional
SID
$1.37B
| $5K | ﹤0.01% |
130
+84
| +183% | +$187 |
|
4625
CALL
SLM Corp
SLM
$4.83B
| $5K | ﹤0.01% |
111
| – | – |
|
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.