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 |
Goldman Sachs
GS
|
+$40.4M |
| 2 |
NVIDIA
NVDA
|
+$23.1M |
| 3 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$21.5M |
| 4 |
Wells Fargo
WFC
|
+$20.8M |
| 5 |
Micron Technology
MU
|
+$20M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Citigroup
C
|
+$21.4M |
| 2 |
Apple
AAPL
|
+$15.7M |
| 3 |
Invesco QQQ Trust
QQQ
|
+$14.4M |
| 4 |
Eli Lilly
LLY
|
+$10.5M |
| 5 |
iShares Biotechnology ETF
IBB
|
+$8.06M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 9.73% |
| 2 | Communication Services | 9.25% |
| 3 | Consumer Discretionary | 8.76% |
| 4 | Healthcare | 8.53% |
| 5 | Financials | 7.38% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
151
American International
AIG
$42.5B
| $2.75M | 0.12% |
+44,145
| New | +$2.83M |
|
152
Comcast
CMCSA
$85.1B
| $2.73M | 0.12% |
+72,662
| New | +$2.7M |
|
|
ATVI
153
DELISTED
Activision Blizzard
ATVI
| $2.71M | 0.12% |
+54,376
| New | +$2.39M |
|
154
PUT
CVS Health
CVS
$141B
| $2.69M | 0.12% |
6,539
+2,792
| +75% | +$223K |
|
|
155
PUT
NVIDIA
NVDA
$5.02T
| $2.66M | 0.12% |
451,040
-185,520
| -29% | -$494K |
|
156
WisdomTree Japan Hedged Equity Fund
DXJ
$7.21B
| $2.65M | 0.11% |
52,411
+16,076
| +44% | +$819K |
|
157
Assured Guaranty
AGO
$3.78B
| $2.65M | 0.11% |
+71,377
| New | +$2.83M |
|
158
Citizens Financial Group
CFG
$30.2B
| $2.64M | 0.11% |
+76,341
| New | +$2.79M |
|
|
CLVS
159
DELISTED
Clovis Oncology, Inc.
CLVS
| $2.63M | 0.11% |
41,373
+32,246
| +353% | +$1.96M |
|
160
GE Aerospace
GE
$353B
| $2.63M | 0.11% |
+18,423
| New | +$2.67M |
|
161
Philips
PHG
$25.8B
| $2.6M | 0.11% |
109,495
+48,162
| +79% | +$1.08M |
|
162
Deutsche Bank
DB
$67.7B
| $2.6M | 0.11% |
+151,303
| New | +$2.62M |
|
|
K
163
DELISTED
Kellanova
K
| $2.59M | 0.11% |
37,940
+34,598
| +1,035% | +$2.39M |
|
|
164
CALL
Micron Technology
MU
$1.1T
| $2.58M | 0.11% |
6,741
+1,298
| +24% | +$31.7K |
|
165
Dick's Sporting Goods
DKS
$18.7B
| $2.57M | 0.11% |
+52,829
| New | +$2.68M |
|
166
PUT
Bausch Health
BHC
$1.69B
| $2.57M | 0.11% |
7,739
+344
| +5% | +$4.73K |
|
167
Vulcan Materials
VMC
$36.4B
| $2.56M | 0.11% |
+21,263
| New | +$2.6M |
|
168
Kinder Morgan
KMI
$72B
| $2.54M | 0.11% |
117,076
+109,931
| +1,539% | +$2.4M |
|
169
Synchrony
SYF
$24.3B
| $2.52M | 0.11% |
+73,443
| New | +$2.63M |
|
170
Under Armour
UAA
$3.14B
| $2.49M | 0.11% |
+126,000
| New | +$2.94M |
|
171
PUT
Regeneron Pharmaceuticals
REGN
$70.5B
| $2.49M | 0.11% |
1,003
-26
| -3% | -$9.64K |
|
172
Lam Research
LRCX
$403B
| $2.47M | 0.11% |
192,160
+14,900
| +8% | +$175K |
|
173
Corpay
CPAY
$24.1B
| $2.44M | 0.11% |
16,133
+15,164
| +1,565% | +$2.38M |
|
174
PUT
Under Armour Class C
UA
$3.04B
| $2.41M | 0.1% |
4,456
+1,767
| +66% | +$36.8K |
|
175
Rio Tinto
RIO
$147B
| $2.4M | 0.1% |
59,127
+37,705
| +176% | +$1.6M |
|
Similar funds
Simplex Trading's Q1 2017 Portfolio in Review
As of Q1 2017, Simplex Trading held 7,485 positions worth $2.31B, up 38% from $1.67B the previous quarter. Its ten largest holdings account for 18% of the portfolio.
Simplex Trading deployed $551M of net new capital in Q1 2017, opening 1,662 new positions and adding to 2,374 existing holdings. Its largest new stake was iShares 20+ Year Treasury Bond ETF: 179,511 shares worth $21.7M.
By sector, the portfolio is most concentrated in Technology at 9.7% of assets, up from 7.2% a quarter earlier, followed by Communication Services and Consumer Discretionary.
On the sell side, the largest reduction was Citigroup, an estimated $21.4M trimmed.
- Simplex Trading's largest Q1 2017 buy was iShares 20+ Year Treasury Bond ETF: 179,511 shares worth $21.7M.
- Simplex Trading added most to Goldman Sachs in Q1 2017, an estimated $40.4M increase.
- Simplex Trading's biggest Q1 2017 reduction was Citigroup, cutting an estimated $21.4M.
- Simplex Trading fully exited Invesco QQQ Trust in Q1 2017, selling an estimated $14.4M.
- Simplex Trading's ten largest holdings make up 18% of its $2.31B portfolio in Q1 2017.
- Simplex Trading opened 1,662 new positions and closed 1,369 in Q1 2017.
- Simplex Trading's portfolio value rose 38% quarter-over-quarter to $2.31B.
Based on Simplex Trading's 13F filing for Q1 2017, filed 21 Apr 2017.