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 | |
|---|---|---|---|---|---|---|
4176
PUT
Murphy Oil
MUR
$5.55B
| $8K | ﹤0.01% |
238
+162
| +213% | +$4.67K |
|
4177
CALL
Murphy USA
MUSA
$11.4B
| $8K | ﹤0.01% |
47
+1
| +2% | +$66 |
|
4178
Nature's Sunshine
NATR
$362M
| $8K | ﹤0.01% |
+800
| New | +$9.32K |
|
4179
PUT
Navios Maritime Partners
NMM
$2.22B
| $8K | ﹤0.01% |
7
+4
| +133% | +$111 |
|
4180
PUT
Ocular Therapeutix
OCUL
$1.83B
| $8K | ﹤0.01% |
107
-41
| -28% | -$341 |
|
4181
PUT
Oneok
OKE
$56.7B
| $8K | ﹤0.01% |
269
+173
| +180% | +$9.51K |
|
4182
CALL
Pilgrim's Pride
PPC
$7.13B
| $8K | ﹤0.01% |
143
+58
| +68% | +$1.17K |
|
4183
PUT
Primoris Services
PRIM
$4.06B
| $8K | ﹤0.01% |
+7
| New | +$168 |
|
4184
Pricesmart
PSMT
$5.94B
| $8K | ﹤0.01% |
+95
| New | +$8.34K |
|
4185
PUT
Prudential
PUK
$36.4B
| $8K | ﹤0.01% |
34
-327
| -91% | -$12.8K |
|
4186
PUT
Rambus
RMBS
$8.95B
| $8K | ﹤0.01% |
246
-116
| -32% | -$1.52K |
|
4187
PUT
RenaissanceRe
RNR
$13.8B
| $8K | ﹤0.01% |
+33
| New | +$4.72K |
|
4188
CALL
Ross Stores
ROST
$80.8B
| $8K | ﹤0.01% |
294
-399
| -58% | -$26.7K |
|
|
4189
PUT
Ross Stores
ROST
$80.8B
| $8K | ﹤0.01% |
22
-106
| -83% | -$7.08K |
|
4190
CALL
Ryanair
RYAAY
$30B
| $8K | ﹤0.01% |
253
+183
| +261% | +$6.07K |
|
|
SANW
4191
CALL
DELISTED
S&W Seed Co
SANW
| $8K | ﹤0.01% |
+13
| New | +$1.13K |
|
|
ECHO
4192
CALL
EchoStar
ECHO
$24.3B
| $8K | ﹤0.01% |
27
-4
| -13% | -$175 |
|
4193
CALL
Sabesp
SBS
$18.4B
| $8K | ﹤0.01% |
1,057
-1,227
| -54% | -$2.42K |
|
|
SGMO
4194
DELISTED
SANGAMO THERAPEUTICS INC
SGMO
| $8K | ﹤0.01% |
+1,605
| New | +$6.44K |
|
4195
PUT
Teekay Tankers
TNK
$2.71B
| $8K | ﹤0.01% |
19
-11
| -37% | -$204 |
|
|
TOUR
4196
CALL
Tuniu
TOUR
$56.2M
| $8K | ﹤0.01% |
+8
| New | +$702 |
|
4197
CALL
Tractor Supply
TSCO
$16.3B
| $8K | ﹤0.01% |
645
-300
| -32% | -$4.37K |
|
4198
PUT
Televisa
TV
$1.49B
| $8K | ﹤0.01% |
100
-391
| -80% | -$9.26K |
|
4199
PUT
Travere Therapeutics
TVTX
$5.17B
| $8K | ﹤0.01% |
68
-281
| -81% | -$5.5K |
|
4200
CALL
Unum
UNM
$13.4B
| $8K | ﹤0.01% |
69
+21
| +44% | +$983 |
|
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.