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 | |
|---|---|---|---|---|---|---|
501
CALL
Abbott
ABT
$175B
| $730K | 0.03% |
3,114
+1,069
| +52% | +$46.2K |
|
502
CALL
Home Depot
HD
$330B
| $727K | 0.03% |
1,805
-753
| -29% | -$107K |
|
503
Popular Inc
BPOP
$11.2B
| $718K | 0.03% |
+17,632
| New | +$760K |
|
504
CALL
Intuitive Surgical
ISRG
$121B
| $716K | 0.03% |
2,043
-45
| -2% | -$3.56K |
|
505
S&P Global
SPGI
$127B
| $714K | 0.03% |
5,464
-2,228
| -29% | -$277K |
|
|
VMW
506
CALL
DELISTED
VMware, Inc
VMW
| $714K | 0.03% |
1,708
+1,064
| +165% | +$93.6K |
|
|
WWE
507
DELISTED
World Wrestling Entertainment
WWE
| $710K | 0.03% |
31,958
+27,438
| +607% | +$563K |
|
|
HRG
508
DELISTED
HRG Group, Inc.
HRG
| $708K | 0.03% |
36,667
+7,887
| +27% | +$138K |
|
509
SITE Centers
SITC
$224M
| $707K | 0.03% |
43,812
+36,932
| +537% | +$681K |
|
510
iShares Russell Mid-Cap Value ETF
IWS
$15.6B
| $706K | 0.03% |
8,515
+2,945
| +53% | +$243K |
|
511
PUT
Wynn Resorts
WYNN
$9.79B
| $706K | 0.03% |
2,276
-1,285
| -36% | -$128K |
|
512
iShares US Home Construction ETF
ITB
$2.37B
| $703K | 0.03% |
21,997
-1,238
| -5% | -$37.1K |
|
|
XIFR
513
XPLR Infrastructure LP
XIFR
$1.21B
| $702K | 0.03% |
21,193
+17,697
| +506% | +$537K |
|
514
Digital Realty Trust
DLR
$66B
| $701K | 0.03% |
6,591
-5,116
| -44% | -$538K |
|
515
CALL
United Airlines
UAL
$38.1B
| $701K | 0.03% |
2,209
+622
| +39% | +$45K |
|
516
JB Hunt Transport Services
JBHT
$27.4B
| $698K | 0.03% |
+7,612
| New | +$738K |
|
|
P
517
DELISTED
Pandora Media Inc
P
| $698K | 0.03% |
59,151
+1,998
| +3% | +$25.1K |
|
|
WWAV
518
DELISTED
The WhiteWave Foods Company
WWAV
| $698K | 0.03% |
12,447
+10,535
| +551% | +$581K |
|
519
Invesco Senior Loan ETF
BKLN
$7.1B
| $697K | 0.03% |
+30,000
| New | +$699K |
|
520
OFG Bancorp
OFG
$2.2B
| $694K | 0.03% |
+58,837
| New | +$749K |
|
|
SWN
521
DELISTED
Southwestern Energy Company
SWN
| $692K | 0.03% |
84,738
+61,290
| +261% | +$531K |
|
522
PUT
APA Corp
APA
$12.8B
| $686K | 0.03% |
1,162
-616
| -35% | -$34.6K |
|
523
Entegris
ENTG
$20.9B
| $684K | 0.03% |
+29,269
| New | +$605K |
|
524
iShares Core S&P 500 ETF
IVV
$886B
| $684K | 0.03% |
+2,885
| New | +$675K |
|
525
CALL
Charter Communications
CHTR
$15.9B
| $680K | 0.03% |
488
-409
| -46% | -$130K |
|
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.