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 | |
|---|---|---|---|---|---|---|
2726
CALL
Boston Beer
SAM
$1.88B
| $35K | ﹤0.01% |
74
+47
| +174% | +$6.58K |
|
2727
CALL
Suncor Energy
SU
$77.7B
| $35K | ﹤0.01% |
773
-91
| -11% | -$2.8K |
|
2728
CALL
Stryker
SYK
$127B
| $35K | ﹤0.01% |
51
-294
| -85% | -$40.3K |
|
2729
CALL
Synaptics
SYNA
$4.41B
| $35K | ﹤0.01% |
222
+31
| +16% | +$1.69K |
|
2730
CALL
United States Oil Fund
USO
$2.45B
| $35K | ﹤0.01% |
243
-548
| -69% | -$43.8K |
|
2731
CALL
Viasat
VSAT
$9.79B
| $35K | ﹤0.01% |
70
-31
| -31% | -$2.04K |
|
2732
CALL
Vuzix
VUZI
$190M
| $35K | ﹤0.01% |
300
-109
| -27% | -$646 |
|
|
WSR
2733
DELISTED
Whitestone REIT
WSR
| $35K | ﹤0.01% |
2,868
+1,752
| +157% | +$21.9K |
|
|
HA
2734
CALL
DELISTED
Hawaiian Holdings, Inc.
HA
| $35K | ﹤0.01% |
257
+19
| +8% | +$966 |
|
|
UNVR
2735
DELISTED
Univar Solutions Inc.
UNVR
| $35K | ﹤0.01% |
1,205
-20,756
| -95% | -$629K |
|
|
KIN
2736
CALL
DELISTED
Kindred Biosciences, Inc.
KIN
| $35K | ﹤0.01% |
+98
| New | +$703 |
|
|
WUBA
2737
PUT
DELISTED
58.com Inc
WUBA
| $35K | ﹤0.01% |
413
+110
| +36% | +$4.53K |
|
|
JAG
2738
CALL
DELISTED
Jagged Peak Energy Inc.
JAG
| $35K | ﹤0.01% |
+224
| New | +$2.82K |
|
|
DF
2739
DELISTED
Dean Foods Company
DF
| $35K | ﹤0.01% |
2,083
-3,950
| -65% | -$74K |
|
|
ELGX
2740
PUT
DELISTED
Endologix Inc
ELGX
| $35K | ﹤0.01% |
64
| – | – |
|
|
MATR
2741
DELISTED
Mattersight Corp.
MATR
| $35K | ﹤0.01% |
13,935
+12,041
| +636% | +$35.2K |
|
2742
CALL
Ameriprise Financial
AMP
$46.8B
| $34K | ﹤0.01% |
157
-13
| -8% | -$1.65K |
|
2743
PUT
Ball Corp
BALL
$17B
| $34K | ﹤0.01% |
108
-858
| -89% | -$33.9K |
|
2744
CALL
BHP
BHP
$213B
| $34K | ﹤0.01% |
733
-1,148
| -61% | -$36.4K |
|
2745
PUT
Box
BOX
$4.02B
| $34K | ﹤0.01% |
70
-1
| -1% | -$18 |
|
2746
PUT
Burlington
BURL
$22B
| $34K | ﹤0.01% |
98
-17
| -15% | -$1.64K |
|
2747
Carpenter Technology
CRS
$30B
| $34K | ﹤0.01% |
909
-4,648
| -84% | -$172K |
|
2748
CALL
CVR Energy
CVI
$3.36B
| $34K | ﹤0.01% |
+305
| New | +$6.26K |
|
2749
PUT
D.R. Horton
DHI
$41B
| $34K | ﹤0.01% |
737
+554
| +303% | +$18.5K |
|
2750
Dorchester Minerals
DMLP
$1.34B
| $34K | ﹤0.01% |
2,356
+1,707
| +263% | +$27.8K |
|
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.