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 | |
|---|---|---|---|---|---|---|
|
RSX
251
DELISTED
VanEck Russia ETF
RSX
| $1.46M | 0.06% |
76,011
-6,482
| -8% | -$130K |
|
|
GAP
252
The Gap Inc
GAP
$7.11B
| $1.46M | 0.06% |
66,233
-47,286
| -42% | -$1.13M |
|
253
CALL
Abbott
ABT
$175B
| $1.45M | 0.06% |
2,951
-163
| -5% | -$7.38K |
|
254
CALL
American International
AIG
$41.8B
| $1.45M | 0.06% |
2,101
+295
| +16% | +$18.3K |
|
|
RDS.A
255
DELISTED
Royal Dutch Shell PLC ADS Class A
RDS.A
| $1.45M | 0.06% |
27,209
-12,589
| -32% | -$674K |
|
|
ALXN
256
CALL
DELISTED
Alexion Pharmaceuticals
ALXN
| $1.45M | 0.06% |
1,946
+1,582
| +435% | +$184K |
|
257
CALL
Caterpillar
CAT
$411B
| $1.43M | 0.06% |
2,730
-952
| -26% | -$96.7K |
|
258
Nexstar Media Group
NXST
$5.5B
| $1.43M | 0.06% |
23,886
+17,051
| +249% | +$1.07M |
|
259
BlackBerry
BB
$5.23B
| $1.42M | 0.06% |
142,444
-13,316
| -9% | -$131K |
|
260
Perrigo
PRGO
$1.49B
| $1.42M | 0.06% |
+18,823
| New | +$1.35M |
|
|
CLVS
261
CALL
DELISTED
Clovis Oncology, Inc.
CLVS
| $1.42M | 0.06% |
673
+409
| +155% | +$25K |
|
262
CALL
Chipotle Mexican Grill
CMG
$42.2B
| $1.42M | 0.06% |
214,450
-30,800
| -13% | -$286K |
|
263
Nabors Industries
NBR
$1.27B
| $1.41M | 0.06% |
+3,461
| New | +$1.74M |
|
264
CALL
UnitedHealth
UNH
$394B
| $1.41M | 0.06% |
1,286
-67
| -5% | -$11.7K |
|
265
PUT
Bath & Body Works
BBWI
$4.07B
| $1.39M | 0.06% |
1,362
-797
| -37% | -$32.7K |
|
266
CALL
Broadcom
AVGO
$1.84T
| $1.38M | 0.06% |
21,480
+9,970
| +87% | +$231K |
|
267
Teva Pharmaceuticals
TEVA
$36.2B
| $1.37M | 0.06% |
41,320
-88,622
| -68% | -$2.74M |
|
|
ATVI
268
CALL
DELISTED
Activision Blizzard
ATVI
| $1.37M | 0.06% |
1,825
-509
| -22% | -$28.1K |
|
269
PUT
Deutsche Bank
DB
$68.2B
| $1.37M | 0.06% |
2,127
-5,103
| -71% | -$90.3K |
|
270
McDonald's
MCD
$188B
| $1.36M | 0.06% |
+8,872
| New | +$1.28M |
|
|
GGP
271
DELISTED
GGP Inc.
GGP
| $1.35M | 0.06% |
57,478
+51,883
| +927% | +$1.19M |
|
272
PUT
JPMorgan Chase
JPM
$919B
| $1.35M | 0.06% |
11,326
-243
| -2% | -$21K |
|
|
JWN
273
DELISTED
Nordstrom
JWN
| $1.34M | 0.06% |
27,938
-15,125
| -35% | -$688K |
|
274
PUT
ExxonMobil
XOM
$638B
| $1.33M | 0.06% |
7,918
+2,969
| +60% | +$243K |
|
275
State Street SPDR S&P Regional Banking ETF
KRE
$4.86B
| $1.32M | 0.06% |
24,105
-52,444
| -69% | -$2.82M |
|
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.