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 | |
|---|---|---|---|---|---|---|
3476
PUT
Delek Logistics
DKL
$3.07B
| $16K | ﹤0.01% |
193
-12
| -6% | -$387 |
|
3477
PUT
Healthpeak Properties
DOC
$15.7B
| $16K | ﹤0.01% |
559
+26
| +5% | +$798 |
|
3478
CALL
Amdocs
DOX
$5.83B
| $16K | ﹤0.01% |
+101
| New | +$6.07K |
|
3479
Dawson Geophysical
DWSN
$137M
| $16K | ﹤0.01% |
3,051
+2,657
| +674% | +$18.3K |
|
3480
PUT
Energy Focus
EFOI
$17.6M
| $16K | ﹤0.01% |
3
-1
| -25% | -$143 |
|
3481
CALL
EQT Corp
EQT
$32.3B
| $16K | ﹤0.01% |
235
+171
| +267% | +$5.71K |
|
3482
CALL
Global Net Lease
GNL
$1.86B
| $16K | ﹤0.01% |
+233
| New | +$5.53K |
|
3483
Hallador Energy
HNRG
$689M
| $16K | ﹤0.01% |
2,080
+89
| +4% | +$785 |
|
3484
CALL
Henry Schein
HSIC
$9.76B
| $16K | ﹤0.01% |
120
+77
| +179% | +$5K |
|
3485
IAMGOLD
IAG
$8.24B
| $16K | ﹤0.01% |
4,015
-1,277
| -24% | -$5.44K |
|
3486
PUT
Jones Lang LaSalle
JLL
$15.9B
| $16K | ﹤0.01% |
282
+274
| +3,425% | +$29.8K |
|
3487
CALL
Lexicon Pharmaceuticals
LXRX
$1.04B
| $16K | ﹤0.01% |
472
+367
| +350% | +$5.45K |
|
3488
PUT
LSB Industries
LXU
$822M
| $16K | ﹤0.01% |
515
+355
| +222% | +$2.45K |
|
3489
CALL
Methanex
MEOH
$4.12B
| $16K | ﹤0.01% |
126
+20
| +19% | +$960 |
|
3490
PUT
PBF Energy
PBF
$7.22B
| $16K | ﹤0.01% |
118
-160
| -58% | -$3.75K |
|
3491
CALL
Polaris
PII
$4.07B
| $16K | ﹤0.01% |
136
+65
| +92% | +$5.59K |
|
|
PR
3492
Permian Resources
PR
$16.5B
| $16K | ﹤0.01% |
+913
| New | +$16.8K |
|
3493
Primoris Services
PRIM
$4.28B
| $16K | ﹤0.01% |
700
-331
| -32% | -$7.95K |
|
|
P
3494
CALL
Everpure Inc
P
$24.3B
| $16K | ﹤0.01% |
71
+11
| +18% | +$122 |
|
3495
Pixelworks
PXLW
$37.2M
| $16K | ﹤0.01% |
287
+231
| +413% | +$10.5K |
|
3496
CALL
Ultragenyx Pharmaceutical
RARE
$2.56B
| $16K | ﹤0.01% |
98
+44
| +81% | +$3.35K |
|
3497
CALL
Rush Enterprises Class A
RUSHA
$6.13B
| $16K | ﹤0.01% |
272
+252
| +1,260% | +$3.73K |
|
3498
PUT
Royal Bank of Canada
RY
$295B
| $16K | ﹤0.01% |
157
-25
| -14% | -$1.81K |
|
3499
PUT
SolarEdge
SEDG
$2.44B
| $16K | ﹤0.01% |
231
+117
| +103% | +$1.63K |
|
3500
CALL
abrdn Physical Gold Shares ETF
SGOL
$6.87B
| $16K | ﹤0.01% |
+460
| New | +$5.45K |
|
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.