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 | |
|---|---|---|---|---|---|---|
201
Direxion Daily FTSE China Bull 3X ETF
YINN
$655M
| $1.07M | 0.09% |
+1,212
| New | +$1.36M |
|
202
Liberty Global Class A
LBTYA
$3.5B
| $1.07M | 0.09% |
23,980
+17,481
| +269% | +$776K |
|
203
PUT
Bank of America
BAC
$431B
| $1.06M | 0.09% |
3,304
+1,433
| +77% | +$23.6K |
|
204
CALL
Humana
HUM
$48.2B
| $1.06M | 0.09% |
1,763
+1,576
| +843% | +$293K |
|
205
PUT
Gilead Sciences
GILD
$164B
| $1.05M | 0.09% |
4,374
-1,505
| -26% | -$164K |
|
206
Citigroup
C
$222B
| $1.05M | 0.09% |
18,942
+13,799
| +268% | +$751K |
|
207
CALL
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
$46.1B
| $1.04M | 0.09% |
1,445
+233
| +19% | +$41.9K |
|
208
TripAdvisor
TRIP
$1.59B
| $1.04M | 0.09% |
+11,941
| New | +$971K |
|
209
CALL
ProShares Ultra S&P500
SSO
$8.02B
| $1.04M | 0.09% |
11,360
-2,768
| -20% | -$23.2K |
|
210
Consolidated Edison
ED
$41B
| $1.03M | 0.09% |
17,861
+10,292
| +136% | +$621K |
|
211
PUT
Boeing
BA
$162B
| $1.02M | 0.09% |
1,403
+353
| +34% | +$51.5K |
|
|
ISSI
212
DELISTED
INTEGRATED SILICON SOLUTN INC
ISSI
| $1.02M | 0.09% |
+46,187
| New | +$915K |
|
|
ANN
213
DELISTED
ANN INC
ANN
| $1.02M | 0.09% |
21,054
+15,560
| +283% | +$672K |
|
|
KKD
214
DELISTED
KRISPY KREME DOUGHNUTS INC
KKD
| $1.01M | 0.08% |
52,465
-405
| -0.8% | -$7.51K |
|
215
Energy Transfer Partners
ET
$70.6B
| $1M | 0.08% |
31,232
-22,502
| -42% | -$754K |
|
216
CALL
Direxion Daily Technology Bull 3x ETF
TECL
$5.52B
| $991K | 0.08% |
24,770
-109,030
| -81% | -$366K |
|
217
PUT
Qualcomm
QCOM
$187B
| $987K | 0.08% |
1,054
-312
| -23% | -$21.3K |
|
|
218
PUT
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
$46.1B
| $986K | 0.08% |
1,991
+683
| +52% | +$123K |
|
|
MBLY
219
CALL
DELISTED
Mobileye N.V.
MBLY
| $984K | 0.08% |
1,415
+440
| +45% | +$20.9K |
|
|
WX
220
DELISTED
WUXI PHARMATECH, CAYMAN INC REPSTG 8 ORD SHS
WX
| $984K | 0.08% |
23,296
+20,823
| +842% | +$878K |
|
221
Medtronic
MDT
$105B
| $979K | 0.08% |
13,225
+9,667
| +272% | +$739K |
|
222
SLB Ltd
SLB
$71.4B
| $973K | 0.08% |
11,292
-29,117
| -72% | -$2.63M |
|
223
Macy's
M
$6.39B
| $967K | 0.08% |
+14,338
| New | +$969K |
|
224
Thermo Fisher Scientific
TMO
$194B
| $966K | 0.08% |
7,445
+6,765
| +995% | +$882K |
|
225
PUT
ExxonMobil
XOM
$638B
| $965K | 0.08% |
1,362
-1,602
| -54% | -$138K |
|
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.