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 | |
|---|---|---|---|---|---|---|
|
JKS
3251
PUT
JinkoSolar
JKS
$799M
| $20K | ﹤0.01% |
182
-231
| -56% | -$3.66K |
|
3252
PUT
KeyCorp
KEY
$24.1B
| $20K | ﹤0.01% |
1,030
+764
| +287% | +$14K |
|
3253
CALL
KLA
KLAC
$266B
| $20K | ﹤0.01% |
540
+340
| +170% | +$2.99K |
|
3254
PUT
Lamar Advertising Co
LAMR
$16.3B
| $20K | ﹤0.01% |
+188
| New | +$14.1K |
|
3255
PUT
Macerich
MAC
$7.41B
| $20K | ﹤0.01% |
+163
| New | +$11K |
|
3256
Ingevity
NGVT
$2.59B
| $20K | ﹤0.01% |
329
+26
| +9% | +$1.47K |
|
3257
PUT
NN Inc
NNBR
$273M
| $20K | ﹤0.01% |
+196
| New | +$4.09K |
|
3258
CALL
Northrop Grumman
NOC
$77.8B
| $20K | ﹤0.01% |
83
-182
| -69% | -$43.2K |
|
3259
PUT
Omeros
OMER
$821M
| $20K | ﹤0.01% |
516
+313
| +154% | +$3.42K |
|
3260
PUT
Paychex
PAYX
$41.1B
| $20K | ﹤0.01% |
210
+161
| +329% | +$9.78K |
|
|
PBPB
3261
PUT
DELISTED
Potbelly
PBPB
| $20K | ﹤0.01% |
790
+742
| +1,546% | +$9.75K |
|
3262
CALL
Principal Financial Group
PFG
$24B
| $20K | ﹤0.01% |
358
-54
| -13% | -$3.29K |
|
|
P
3263
PUT
Everpure Inc
P
$24.7B
| $20K | ﹤0.01% |
234
-1,694
| -88% | -$18.8K |
|
3264
PUT
Restaurant Brands International
QSR
$25.8B
| $20K | ﹤0.01% |
360
+89
| +33% | +$4.66K |
|
3265
CALL
Rambus
RMBS
$10.4B
| $20K | ﹤0.01% |
475
+235
| +98% | +$3.09K |
|
3266
PUT
ResMed
RMD
$29.5B
| $20K | ﹤0.01% |
389
+223
| +134% | +$15.4K |
|
3267
Schwab US Dividend Equity ETF
SCHD
$103B
| $20K | ﹤0.01% |
1,395
+1,095
| +365% | +$16.1K |
|
3268
CALL
SM Energy
SM
$7.26B
| $20K | ﹤0.01% |
400
+128
| +47% | +$3.54K |
|
|
SNV
3269
CALL
DELISTED
Synovus
SNV
| $20K | ﹤0.01% |
149
+48
| +48% | +$2K |
|
3270
CALL
Teradata
TDC
$2.8B
| $20K | ﹤0.01% |
157
-46
| -23% | -$1.39K |
|
3271
CALL
UBS Group
UBS
$172B
| $20K | ﹤0.01% |
325
-150
| -32% | -$2.41K |
|
3272
PUT
Veracyte
VCYT
$4.44B
| $20K | ﹤0.01% |
395
-17
| -4% | -$139 |
|
|
YRD
3273
CALL
Yiren Digital
YRD
$103M
| $20K | ﹤0.01% |
26
-10
| -28% | -$239 |
|
|
ARAV
3274
PUT
DELISTED
Aravive, Inc. Common Stock
ARAV
| $20K | ﹤0.01% |
+15
| New | +$1.58K |
|
|
INFO
3275
CALL
DELISTED
IHS Markit Ltd. Common Shares
INFO
| $20K | ﹤0.01% |
144
-104
| -42% | -$4.11K |
|
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.