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 |
iShares Russell 2000 ETF
IWM
|
+$29.8M |
| 2 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$17.1M |
| 3 |
Walt Disney
DIS
|
+$14.8M |
| 4 |
Gilead Sciences
GILD
|
+$11.8M |
| 5 |
iShares MSCI Emerging Markets ETF
EEM
|
+$11.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Alphabet (Google) Class C
GOOG
|
+$92.9M |
| 2 |
Apple
AAPL
|
+$22.5M |
| 3 |
Meta Platforms (Facebook)
META
|
+$20.5M |
| 4 |
IBM
IBM
|
+$12.7M |
| 5 |
Baidu
BIDU
|
+$10M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Healthcare | 6.46% |
| 2 | Communication Services | 4.66% |
| 3 | Consumer Discretionary | 4.6% |
| 4 | Technology | 4.57% |
| 5 | Financials | 4.49% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
176
PUT
UnitedHealth
UNH
$396B
| $1.44M | 0.11% |
2,668
+1,505
| +129% | +$180K |
|
177
GE Aerospace
GE
$353B
| $1.44M | 0.11% |
11,901
+10,100
| +561% | +$1.24M |
|
178
PUT
Chipotle Mexican Grill
CMG
$42.7B
| $1.43M | 0.11% |
70,400
+27,450
| +64% | +$390K |
|
|
BEAV
179
DELISTED
B/E Aerospace Inc
BEAV
| $1.43M | 0.11% |
32,649
+28,185
| +631% | +$1.41M |
|
|
X
180
PUT
DELISTED
US Steel
X
| $1.39M | 0.1% |
2,178
+957
| +78% | +$16K |
|
|
CELG
181
PUT
DELISTED
Celgene Corp
CELG
| $1.39M | 0.1% |
2,299
+212
| +10% | +$26.3K |
|
182
Ralph Lauren
RL
$22.4B
| $1.39M | 0.1% |
+11,755
| New | +$1.4M |
|
183
Invesco DB US Dollar Index Bullish Fund
UUP
$433M
| $1.39M | 0.1% |
+55,306
| New | +$1.39M |
|
184
APA Corp
APA
$12.6B
| $1.38M | 0.1% |
35,287
+19,641
| +126% | +$893K |
|
|
TYNS
185
CALL
DELISTED
Direxion Daily 7-10 Year Treasury Bear 1X Shares
TYNS
| $1.36M | 0.1% |
9,034
+89
| +1% | +$2.69K |
|
|
HME
186
DELISTED
HOME PROPERTIES, INC
HME
| $1.36M | 0.1% |
18,225
+8,160
| +81% | +$604K |
|
187
PUT
CF Industries
CF
$18.9B
| $1.36M | 0.1% |
1,214
-1,375
| -53% | -$80K |
|
|
VIAB
188
DELISTED
Viacom Inc. Class B
VIAB
| $1.32M | 0.1% |
30,704
+4,338
| +16% | +$215K |
|
189
Deutsche Bank
DB
$67.7B
| $1.32M | 0.1% |
54,890
+28,160
| +105% | +$778K |
|
|
CTXS
190
DELISTED
Citrix Systems Inc
CTXS
| $1.31M | 0.1% |
23,774
+961
| +4% | +$54.7K |
|
191
State Street Materials Select Sector SPDR ETF
XLB
$8.31B
| $1.3M | 0.1% |
+65,408
| New | +$1.46M |
|
192
General Motors
GM
$71.7B
| $1.3M | 0.1% |
43,173
+21,553
| +100% | +$660K |
|
193
Allstate
ALL
$64.8B
| $1.29M | 0.09% |
22,083
+4,410
| +25% | +$276K |
|
194
Canadian Pacific Kansas City
CP
$80.9B
| $1.26M | 0.09% |
44,025
-4,190
| -9% | -$126K |
|
195
Halliburton
HAL
$27.7B
| $1.26M | 0.09% |
+35,782
| New | +$1.41M |
|
196
Comcast
CMCSA
$85.1B
| $1.26M | 0.09% |
+44,364
| New | +$1.32M |
|
197
lululemon athletica
LULU
$13.2B
| $1.25M | 0.09% |
24,699
+5,196
| +27% | +$317K |
|
198
WisdomTree Japan Hedged Equity Fund
DXJ
$7.21B
| $1.25M | 0.09% |
25,674
-27,033
| -51% | -$1.46M |
|
199
PUT
DuPont de Nemours
DD
$18.3B
| $1.23M | 0.09% |
1,262
+1,135
| +894% | +$132K |
|
200
Assured Guaranty
AGO
$3.78B
| $1.22M | 0.09% |
48,708
-2,470
| -5% | -$62.1K |
|
Similar funds
Simplex Trading's Q3 2015 Portfolio in Review
As of Q3 2015, Simplex Trading held 7,014 positions worth $1.36B, up 14% from $1.19B the previous quarter. Its ten largest holdings account for 15% of the portfolio.
Simplex Trading's Q3 2015 filing shows 1,810 new, 2,203 increased, 1,391 reduced and 1,420 closed positions. Its largest new stake was iShares Russell 2000 ETF: 251,486 shares worth $27.5M. The largest sale was Alphabet (Google) Class C, an estimated $92.9M.
By sector, the portfolio is most concentrated in Healthcare at 6.5% of assets, down from 7.8% a quarter earlier, followed by Communication Services and Consumer Discretionary.
- Simplex Trading's largest Q3 2015 buy was iShares Russell 2000 ETF: 251,486 shares worth $27.5M.
- Simplex Trading added most to iShares MSCI Emerging Markets ETF in Q3 2015, an estimated $11.2M increase.
- Simplex Trading's biggest Q3 2015 reduction was Alphabet (Google) Class C, cutting an estimated $92.9M.
- Simplex Trading fully exited IBM in Q3 2015, selling an estimated $12.7M.
- Simplex Trading's ten largest holdings make up 15% of its $1.36B portfolio in Q3 2015.
- Simplex Trading opened 1,810 new positions and closed 1,420 in Q3 2015.
- Simplex Trading's portfolio value rose 14% quarter-over-quarter to $1.36B.
Based on Simplex Trading's 13F filing for Q3 2015, filed 8 Oct 2015.