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 | |
|---|---|---|---|---|---|---|
1126
CALL
Arista Networks
ANET
$220B
| $227K | 0.01% |
2,288
-1,536
| -40% | -$10.6K |
|
1127
Regions Financial
RF
$26.2B
| $227K | 0.01% |
+15,661
| New | +$231K |
|
1128
TD Synnex
SNX
$19.8B
| $227K | 0.01% |
4,060
+3,656
| +905% | +$218K |
|
|
LEAF
1129
DELISTED
Leaf Group Ltd.
LEAF
| $226K | 0.01% |
30,147
+27,974
| +1,287% | +$206K |
|
1130
Aqua Metals
AQMS
$9.35M
| $225K | 0.01% |
+58
| New | +$180K |
|
1131
Gogo Inc
GOGO
$525M
| $225K | 0.01% |
20,531
+18,639
| +985% | +$188K |
|
1132
CALL
The Mosaic Company
MOS
$7.11B
| $225K | 0.01% |
1,670
+351
| +27% | +$10.8K |
|
|
TPH
1133
DELISTED
Tri Pointe Homes
TPH
| $225K | 0.01% |
17,953
-29,293
| -62% | -$360K |
|
1134
CALL
VF Corp
VFC
$6.54B
| $224K | 0.01% |
2,196
+1,538
| +234% | +$75.9K |
|
|
MDCO
1135
CALL
DELISTED
Medicines Co
MDCO
| $224K | 0.01% |
573
+220
| +62% | +$10K |
|
1136
Gaming and Leisure Properties
GLPI
$12.7B
| $223K | 0.01% |
6,684
-63
| -0.9% | -$1.99K |
|
|
PPLI
1137
People Inc
PPLI
$3.13B
| $223K | 0.01% |
+16,932
| New | +$220K |
|
1138
CALL
General Dynamics
GD
$104B
| $222K | 0.01% |
378
-317
| -46% | -$58.6K |
|
|
ARAV
1139
DELISTED
Aravive, Inc. Common Stock
ARAV
| $222K | 0.01% |
+1,739
| New | +$183K |
|
|
INTX
1140
DELISTED
Intersections, Inc.
INTX
| $222K | 0.01% |
55,338
+32,816
| +146% | +$127K |
|
1141
PUT
Howmet Aerospace
HWM
$116B
| $221K | 0.01% |
4,563
+3,401
| +293% | +$66.8K |
|
1142
PUT
Navient
NAVI
$790M
| $221K | 0.01% |
739
-624
| -46% | -$9.57K |
|
1143
Pegasystems
PEGA
$4.33B
| $221K | 0.01% |
10,080
+7,040
| +232% | +$143K |
|
|
HTO
1144
H2O America
HTO
$2.69B
| $221K | 0.01% |
4,599
+4,023
| +698% | +$198K |
|
1145
CALL
Axalta
AXTA
$6.99B
| $220K | 0.01% |
688
+279
| +68% | +$8.29K |
|
1146
Banco Santander
SAN
$194B
| $220K | 0.01% |
37,846
-77,182
| -67% | -$415K |
|
1147
PUT
American Express
AXP
$219B
| $219K | 0.01% |
2,630
-67
| -2% | -$5.24K |
|
1148
Comtech Telecommunications
CMTL
$53M
| $219K | 0.01% |
+14,908
| New | +$181K |
|
1149
Zillow
ZG
$6.8B
| $219K | 0.01% |
+6,480
| New | +$231K |
|
1150
Ericsson
ERIC
$30.6B
| $217K | 0.01% |
+32,812
| New | +$202K |
|
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.