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 | |
|---|---|---|---|---|---|---|
226
CALL
Chipotle Mexican Grill
CMG
$42.5B
| $951K | 0.08% |
33,800
+15,250
| +82% | +$193K |
|
227
Alnylam Pharmaceuticals
ALNY
$35.6B
| $944K | 0.08% |
+7,883
| New | +$942K |
|
228
Bread Financial
BFH
$4.12B
| $936K | 0.08% |
+4,021
| New | +$962K |
|
|
SKX
229
CALL
DELISTED
Skechers
SKX
| $934K | 0.08% |
909
+537
| +144% | +$17.2K |
|
230
RTX Corp
RTX
$262B
| $930K | 0.08% |
+13,332
| New | +$978K |
|
|
ICPT
231
DELISTED
Intercept Pharmaceuticals, Inc.
ICPT
| $929K | 0.08% |
3,849
-4,080
| -51% | -$1.09M |
|
232
iShares TIPS Bond ETF
TIP
$14.5B
| $923K | 0.08% |
+8,244
| New | +$932K |
|
233
Rio Tinto
RIO
$150B
| $920K | 0.08% |
22,333
+9,205
| +70% | +$404K |
|
|
RSX
234
DELISTED
VanEck Russia ETF
RSX
| $917K | 0.08% |
50,179
+7,232
| +17% | +$139K |
|
|
SUNE
235
CALL
DELISTED
SUNEDISON, INC COM
SUNE
| $917K | 0.08% |
2,036
+410
| +25% | +$11.7K |
|
236
iShares Silver Trust
SLV
$28.9B
| $916K | 0.08% |
60,965
+26,257
| +76% | +$412K |
|
237
State Street SPDR S&P Homebuilders ETF
XHB
$1.71B
| $911K | 0.08% |
24,886
+2,843
| +13% | +$103K |
|
|
CEMP
238
DELISTED
Cempra, Inc.
CEMP
| $902K | 0.08% |
26,273
+19,298
| +277% | +$682K |
|
239
APA Corp
APA
$12.8B
| $901K | 0.08% |
15,646
+14,355
| +1,112% | +$904K |
|
240
ExxonMobil
XOM
$640B
| $899K | 0.08% |
+10,816
| New | +$930K |
|
241
CALL
Visa
V
$673B
| $897K | 0.08% |
1,854
-1,580
| -46% | -$107K |
|
242
CALL
Viatris
VTRS
$20B
| $895K | 0.08% |
4,259
+3,600
| +546% | +$254K |
|
243
PUT
Humana
HUM
$47.8B
| $888K | 0.07% |
1,449
+1,388
| +2,275% | +$258K |
|
244
Illumina
ILMN
$29.3B
| $885K | 0.07% |
4,171
-15,638
| -79% | -$3.05M |
|
245
CALL
Valero Energy
VLO
$92.1B
| $883K | 0.07% |
1,563
+938
| +150% | +$55.4K |
|
|
XEC
246
DELISTED
CIMAREX ENERGY CO
XEC
| $878K | 0.07% |
+7,967
| New | +$952K |
|
247
WisdomTree Europe Hedged Equity Fund
HEDJ
$1.84B
| $866K | 0.07% |
+28,140
| New | +$919K |
|
248
Intuitive Surgical
ISRG
$122B
| $864K | 0.07% |
+16,056
| New | +$898K |
|
|
SCTY
249
PUT
DELISTED
SolarCity Corporation
SCTY
| $862K | 0.07% |
2,056
+1,060
| +106% | +$61.7K |
|
250
PUT
Berkshire Hathaway Class B
BRK.B
$1.06T
| $860K | 0.07% |
3,829
+1,285
| +51% | +$183K |
|
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.