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 |
Alphabet (Google) Class C
GOOG
|
+$54.6M |
| 2 |
Apple
AAPL
|
+$29.1M |
| 3 |
Meta Platforms (Facebook)
META
|
+$15.7M |
| 4 |
IBM
IBM
|
+$13.8M |
| 5 |
Baidu
BIDU
|
+$10.6M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$10.1M |
| 2 |
McDonald's
MCD
|
+$8.46M |
| 3 |
Ralph Lauren
RL
|
+$5.36M |
| 4 |
Intel
INTC
|
+$5.04M |
| 5 |
WBA
Walgreens Boots Alliance
WBA
|
+$4.76M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Communication Services | 14.27% |
| 2 | Technology | 10.3% |
| 3 | Healthcare | 7.76% |
| 4 | Consumer Discretionary | 6.32% |
| 5 | Financials | 5.18% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
PXD
176
PUT
DELISTED
Pioneer Natural Resource Co.
PXD
| $1.22M | 0.1% |
783
+470
| +150% | +$74.5K |
|
177
Cummins
CMI
$91.8B
| $1.21M | 0.1% |
+9,221
| New | +$1.27M |
|
|
OVTI
178
DELISTED
OMNIVISION TECHNOLOGIES INC
OVTI
| $1.2M | 0.1% |
+45,751
| New | +$1.23M |
|
179
DaVita
DVA
$15B
| $1.19M | 0.1% |
14,971
+10,969
| +274% | +$901K |
|
180
Blackstone
BX
$152B
| $1.18M | 0.1% |
+29,494
| New | +$1.21M |
|
181
Markel Group
MKL
$24.5B
| $1.18M | 0.1% |
1,474
+1,301
| +752% | +$1.01M |
|
|
YHOO
182
PUT
DELISTED
Yahoo Inc
YHOO
| $1.18M | 0.1% |
1,413
-1,361
| -49% | -$58.5K |
|
183
iShares MSCI Brazil ETF
EWZ
$9.16B
| $1.16M | 0.1% |
35,521
+1,150
| +3% | +$39.7K |
|
184
CALL
Regeneron Pharmaceuticals
REGN
$70.4B
| $1.16M | 0.1% |
268
-8
| -3% | -$3.9K |
|
185
Delta Air Lines
DAL
$55.1B
| $1.15M | 0.1% |
28,093
+15,686
| +126% | +$686K |
|
186
Allstate
ALL
$64.8B
| $1.15M | 0.1% |
17,673
+16,930
| +2,279% | +$1.16M |
|
187
CALL
Walt Disney
DIS
$169B
| $1.15M | 0.1% |
2,346
+1,381
| +143% | +$152K |
|
188
Verizon
VZ
$186B
| $1.15M | 0.1% |
+24,597
| New | +$1.2M |
|
189
United Rentals
URI
$64.3B
| $1.14M | 0.1% |
+13,016
| New | +$1.25M |
|
|
DNKN
190
DELISTED
Dunkin' Brands Group, Inc.
DNKN
| $1.14M | 0.1% |
20,738
+16,286
| +366% | +$843K |
|
191
PUT
Invesco QQQ Trust
QQQ
$470B
| $1.13M | 0.09% |
2,318
+1,167
| +101% | +$127K |
|
|
CBI
192
DELISTED
Chicago Bridge & Iron Nv
CBI
| $1.13M | 0.09% |
22,526
-19,934
| -47% | -$1.04M |
|
|
193
CALL
Invesco QQQ Trust
QQQ
$470B
| $1.12M | 0.09% |
2,740
+1,091
| +66% | +$119K |
|
194
PUT
VanEck Gold Miners ETF
GDX
$23.6B
| $1.1M | 0.09% |
3,644
+778
| +27% | +$15.1K |
|
195
Plains All American Pipeline
PAA
$17.2B
| $1.1M | 0.09% |
25,317
+21,745
| +609% | +$1.04M |
|
196
GSK
GSK
$103B
| $1.1M | 0.09% |
21,089
+17,435
| +477% | +$982K |
|
197
PUT
Yelp
YELP
$1.37B
| $1.1M | 0.09% |
3,012
+2,380
| +377% | +$110K |
|
198
CALL
Williams Companies
WMB
$91.2B
| $1.09M | 0.09% |
2,597
+1,538
| +145% | +$79.2K |
|
199
Invesco CurrencyShares Euro Currency Trust
FXE
$332M
| $1.09M | 0.09% |
10,002
+2,774
| +38% | +$302K |
|
200
DTE Energy
DTE
$30.6B
| $1.09M | 0.09% |
17,170
+13,812
| +411% | +$924K |
|
Similar funds
Simplex Trading's Q2 2015 Portfolio in Review
As of Q2 2015, Simplex Trading held 6,639 positions worth $1.19B, up 39% from $860M the previous quarter. Its ten largest holdings account for 20% of the portfolio.
Simplex Trading deployed $279M of net new capital in Q2 2015, opening 1,607 new positions and adding to 1,829 existing holdings. Its largest new stake was IBM: 85,948 shares worth $13.4M.
By sector, the portfolio is most concentrated in Communication Services at 14% of assets, up from 7.8% a quarter earlier, followed by Technology and Healthcare.
On the sell side, the largest reduction was Intel, an estimated $5.04M trimmed.
- Simplex Trading's largest Q2 2015 buy was IBM: 85,948 shares worth $13.4M.
- Simplex Trading added most to Alphabet (Google) Class C in Q2 2015, an estimated $54.6M increase.
- Simplex Trading's biggest Q2 2015 reduction was Intel, cutting an estimated $5.04M.
- Simplex Trading fully exited State Street SPDR S&P 500 ETF Trust in Q2 2015, selling an estimated $10.1M.
- Simplex Trading's ten largest holdings make up 20% of its $1.19B portfolio in Q2 2015.
- Simplex Trading opened 1,607 new positions and closed 1,438 in Q2 2015.
- Simplex Trading's portfolio value rose 39% quarter-over-quarter to $1.19B.
Based on Simplex Trading's 13F filing for Q2 2015, filed 8 Jul 2015.