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 | |
|---|---|---|---|---|---|---|
126
Lam Research
LRCX
$403B
| $2.97M | 0.13% |
209,870
+17,710
| +9% | +$260K |
|
127
Humana
HUM
$47.8B
| $2.85M | 0.12% |
11,850
-70,234
| -86% | -$15.9M |
|
|
AGN
128
CALL
DELISTED
Allergan plc
AGN
| $2.85M | 0.12% |
2,914
-295
| -9% | -$69.3K |
|
129
PUT
Intel
INTC
$530B
| $2.84M | 0.12% |
9,964
+5,289
| +113% | +$189K |
|
130
Colgate-Palmolive
CL
$72.4B
| $2.82M | 0.12% |
38,057
-107,516
| -74% | -$7.98M |
|
131
Palo Alto Networks
PANW
$279B
| $2.81M | 0.12% |
126,210
-24,522
| -16% | -$495K |
|
132
CALL
Nike
NKE
$63.7B
| $2.77M | 0.12% |
4,874
-92
| -2% | -$4.96K |
|
133
CALL
Mastercard
MA
$484B
| $2.74M | 0.12% |
3,094
+16
| +0.5% | +$1.9K |
|
134
Autodesk
ADSK
$46B
| $2.73M | 0.12% |
27,031
+19,570
| +262% | +$1.94M |
|
135
PUT
iShares MSCI Australia ETF
EWA
$1.34B
| $2.69M | 0.12% |
10,994
+4,007
| +57% | +$88K |
|
136
CALL
American Airlines Group
AAL
$10.1B
| $2.68M | 0.12% |
5,678
-1,481
| -21% | -$68.8K |
|
137
Bunge Global
BG
$23.4B
| $2.66M | 0.12% |
35,679
+34,239
| +2,378% | +$2.6M |
|
138
CALL
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
$46B
| $2.65M | 0.12% |
6,569
+650
| +11% | +$136K |
|
139
Oracle
ORCL
$366B
| $2.65M | 0.12% |
+52,859
| New | +$2.41M |
|
140
CALL
VanEck Gold Miners ETF
GDX
$22.7B
| $2.62M | 0.11% |
16,437
-1,520
| -8% | -$34.6K |
|
|
XYZ
141
Block Inc
XYZ
$47.8B
| $2.57M | 0.11% |
109,385
+63,180
| +137% | +$1.31M |
|
142
PUT
Snap
SNAP
$7.67B
| $2.53M | 0.11% |
10,031
+5,957
| +146% | +$120K |
|
143
ProShares UltraPro S&P 500
UPRO
$5.31B
| $2.51M | 0.11% |
145,170
+37,692
| +35% | +$632K |
|
144
Illumina
ILMN
$27.9B
| $2.51M | 0.11% |
14,848
-17,280
| -54% | -$2.99M |
|
|
FNSR
145
DELISTED
Finisar Corp
FNSR
| $2.49M | 0.11% |
95,952
-5,231
| -5% | -$130K |
|
146
Capital One
COF
$127B
| $2.48M | 0.11% |
+30,087
| New | +$2.45M |
|
147
Corpay
CPAY
$24.1B
| $2.48M | 0.11% |
17,197
+1,064
| +7% | +$152K |
|
|
148
PUT
Gilead Sciences
GILD
$165B
| $2.43M | 0.11% |
7,647
-5,241
| -41% | -$349K |
|
|
APC
149
PUT
DELISTED
Anadarko Petroleum
APC
| $2.43M | 0.11% |
2,279
+436
| +24% | +$23.1K |
|
150
PUT
Microsoft
MSFT
$2.95T
| $2.4M | 0.1% |
9,093
+4,134
| +83% | +$284K |
|
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.