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 | |
|---|---|---|---|---|---|---|
1851
Hexcel
HXL
$8.32B
| $89K | ﹤0.01% |
+1,639
| New | +$86.2K |
|
1852
New Mountain Finance
NMFC
$646M
| $89K | ﹤0.01% |
5,974
-94
| -2% | -$1.37K |
|
1853
PUT
Nelnet
NNI
$4.79B
| $89K | ﹤0.01% |
327
+265
| +427% | +$12.7K |
|
1854
WisdomTree
WT
$2.97B
| $89K | ﹤0.01% |
+9,802
| New | +$94.8K |
|
|
WNR
1855
CALL
DELISTED
Western Refining Inc
WNR
| $89K | ﹤0.01% |
126
-512
| -80% | -$18.5K |
|
1856
CALL
CarMax
KMX
$8.27B
| $88K | ﹤0.01% |
721
+348
| +93% | +$22.6K |
|
1857
CALL
Owens Corning
OC
$11.5B
| $88K | ﹤0.01% |
157
-57
| -27% | -$3.27K |
|
1858
CALL
Raymond James Financial
RJF
$32.5B
| $88K | ﹤0.01% |
885
+459
| +108% | +$23.4K |
|
|
MNDT
1859
PUT
DELISTED
Mandiant, Inc. Common Stock
MNDT
| $88K | ﹤0.01% |
1,094
+726
| +197% | +$8.66K |
|
|
NBL
1860
PUT
DELISTED
Noble Energy, Inc.
NBL
| $88K | ﹤0.01% |
299
+152
| +103% | +$5.63K |
|
|
ORBK
1861
PUT
DELISTED
Orbotech Ltd
ORBK
| $88K | ﹤0.01% |
+647
| New | +$20.9K |
|
|
REN
1862
PUT
DELISTED
Resolute Energy Corporaton
REN
| $88K | ﹤0.01% |
260
+247
| +1,900% | +$10.6K |
|
|
AFAM
1863
CALL
DELISTED
Almost Family Inc
AFAM
| $88K | ﹤0.01% |
402
-5
| -1% | -$239 |
|
|
DGI
1864
DELISTED
DigitalGlobe Inc.
DGI
| $88K | ﹤0.01% |
2,705
+2,703
| +135,150% | +$82.6K |
|
1865
PUT
Banco Macro
BMA
$5.7B
| $87K | ﹤0.01% |
1,553
+1,075
| +225% | +$85.4K |
|
1866
Carlyle Group
CG
$16.3B
| $87K | ﹤0.01% |
5,509
-30,048
| -85% | -$493K |
|
1867
First Trust Natural Gas ETF
FCG
$632M
| $87K | ﹤0.01% |
+3,574
| New | +$90.2K |
|
1868
CALL
Green Plains
GPRE
$1.19B
| $87K | ﹤0.01% |
1,149
+1,122
| +4,156% | +$26.7K |
|
1869
PUT
Interactive Brokers
IBKR
$40.9B
| $87K | ﹤0.01% |
2,244
+1,048
| +88% | +$9.76K |
|
1870
PUT
Phillips 66
PSX
$82.9B
| $87K | ﹤0.01% |
928
-497
| -35% | -$40K |
|
1871
CALL
PTC Therapeutics
PTCT
$6.37B
| $87K | ﹤0.01% |
580
-654
| -53% | -$7.92K |
|
1872
Rambus
RMBS
$10.4B
| $87K | ﹤0.01% |
6,663
-5,978
| -47% | -$78.6K |
|
1873
PUT
Shopify
SHOP
$148B
| $87K | ﹤0.01% |
9,510
+6,550
| +221% | +$37.7K |
|
|
NM
1874
PUT
DELISTED
Navios Maritime Holdings Inc.
NM
| $87K | ﹤0.01% |
30
+23
| +329% | +$414 |
|
|
EPE
1875
PUT
DELISTED
EP Energy Corporation
EPE
| $87K | ﹤0.01% |
286
+249
| +673% | +$1.27K |
|
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.