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 | |
|---|---|---|---|---|---|---|
|
NSM
701
DELISTED
Nationstar Mortgage Holdings
NSM
| $474K | 0.02% |
+30,135
| New | +$533K |
|
702
Encore Capital Group
ECPG
$1.89B
| $473K | 0.02% |
15,363
+14,130
| +1,146% | +$445K |
|
703
PUT
Expedia Group
EXPE
$31.3B
| $473K | 0.02% |
1,583
+594
| +60% | +$72.5K |
|
704
CALL
Halliburton
HAL
$27.6B
| $471K | 0.02% |
2,750
-824
| -23% | -$44.3K |
|
705
Jacobs Solutions
J
$15.4B
| $471K | 0.02% |
10,309
+9,406
| +1,042% | +$445K |
|
706
CALL
Humana
HUM
$47.7B
| $470K | 0.02% |
822
-360
| -30% | -$74.4K |
|
707
CALL
T-Mobile US
TMUS
$207B
| $470K | 0.02% |
1,485
+1,053
| +244% | +$64.7K |
|
708
CALL
Weibo
WB
$1.93B
| $470K | 0.02% |
621
+134
| +28% | +$6.67K |
|
|
VGR
709
DELISTED
Vector Group Ltd.
VGR
| $470K | 0.02% |
36,954
+28,081
| +316% | +$378K |
|
710
Wolfspeed
WOLF
$1.52B
| $469K | 0.02% |
+17,577
| New | +$478K |
|
711
Invesco DB US Dollar Index Bullish Fund
UUP
$432M
| $468K | 0.02% |
18,071
-1,116
| -6% | -$29.1K |
|
|
ZYNE
712
DELISTED
Zynerba Pharmaceuticals, Inc
ZYNE
| $467K | 0.02% |
23,260
+17,622
| +313% | +$350K |
|
|
NVRO
713
DELISTED
NEVRO CORP.
NVRO
| $463K | 0.02% |
4,945
+3,422
| +225% | +$310K |
|
714
CALL
Fastenal
FAST
$52B
| $462K | 0.02% |
4,492
+1,184
| +36% | +$14.8K |
|
|
WBA
715
PUT
DELISTED
Walgreens Boots Alliance
WBA
| $462K | 0.02% |
3,171
+1,377
| +77% | +$115K |
|
|
MMP
716
DELISTED
Magellan Midstream Partners, L.P.
MMP
| $462K | 0.02% |
+6,011
| New | +$466K |
|
717
CALL
HCA Healthcare
HCA
$82.5B
| $461K | 0.02% |
999
+175
| +21% | +$14.6K |
|
|
ACAT
718
DELISTED
Arctic Cat Inc
ACAT
| $461K | 0.02% |
+24,969
| New | +$427K |
|
719
CALL
Thermo Fisher Scientific
TMO
$196B
| $460K | 0.02% |
409
+232
| +131% | +$35.5K |
|
720
Tesla
TSLA
$1.4T
| $459K | 0.02% |
24,750
+15,750
| +175% | +$266K |
|
721
iShares Core US Aggregate Bond ETF
AGG
$138B
| $457K | 0.02% |
+4,216
| New | +$456K |
|
722
OSI Systems
OSIS
$3.46B
| $455K | 0.02% |
+6,234
| New | +$463K |
|
723
Piper Sandler
PIPR
$5.15B
| $455K | 0.02% |
+28,548
| New | +$505K |
|
724
PUT
Dick's Sporting Goods
DKS
$18.8B
| $454K | 0.02% |
1,371
+825
| +151% | +$41.8K |
|
725
CALL
Oracle
ORCL
$362B
| $452K | 0.02% |
2,453
+813
| +50% | +$33.9K |
|
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.