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 |
Invesco QQQ Trust
QQQ
|
+$86.9M |
| 2 |
Walt Disney
DIS
|
+$25.5M |
| 3 |
Baidu
BIDU
|
+$12.3M |
| 4 |
Alphabet (Google) Class A
GOOGL
|
+$12.3M |
| 5 |
RHT
Red Hat Inc
RHT
|
+$11.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$66M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$60.3M |
| 3 |
Alphabet (Google) Class C
GOOG
|
+$33.9M |
| 4 |
Apple
AAPL
|
+$21.1M |
| 5 |
State Street Financial Select Sector SPDR ETF
XLF
|
+$18.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Communication Services | 0.58% |
| 2 | Technology | 0.42% |
| 3 | Healthcare | 0.34% |
| 4 | Consumer Discretionary | 0.29% |
| 5 | Industrials | 0.21% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
XYZ
351
Block Inc
XYZ
$46.1B
| $11.5M | 0.03% |
153,825
-97,139
| -39% | -$7.04M |
|
352
CALL
Northrop Grumman
NOC
$74.6B
| $11.4M | 0.03% |
423
-130
| -24% | -$35.5K |
|
353
PUT
Corpay
CPAY
$23.5B
| $11.4M | 0.03% |
462
+424
| +1,116% | +$91.7K |
|
354
Johnson & Johnson
JNJ
$615B
| $11.3M | 0.03% |
+81,179
| New | +$10.9M |
|
355
PUT
Lockheed Martin
LMT
$119B
| $11.3M | 0.03% |
378
-426
| -53% | -$125K |
|
356
Merck
MRK
$315B
| $11.3M | 0.03% |
142,874
+137,910
| +2,778% | +$10.3M |
|
357
CALL
Truist Financial
TFC
$63.2B
| $11.3M | 0.03% |
2,435
+1,358
| +126% | +$66.2K |
|
|
PPLC
358
PUT
DELISTED
PortfolioPlus S&P 500 ETF
PPLC
| $11.3M | 0.03% |
4,115
-3,842
| -48% | -$140K |
|
359
PUT
Honeywell
HON
$73.8B
| $11.2M | 0.03% |
876
-210
| -19% | -$29.3K |
|
360
PUT
iShares MSCI Global Gold Miners ETF
RING
$2.36B
| $11.1M | 0.03% |
2,123
+528
| +33% | +$9.08K |
|
361
PUT
Etsy
ETSY
$7.64B
| $11M | 0.03% |
1,637
+533
| +48% | +$31.8K |
|
362
PUT
Edwards Lifesciences
EW
$48.6B
| $11M | 0.03% |
1,725
+999
| +138% | +$57K |
|
363
PUT
Fidelity National Information Services
FIS
$21B
| $11M | 0.03% |
972
+572
| +143% | +$61K |
|
364
PUT
Marathon Petroleum
MPC
$92.2B
| $11M | 0.03% |
1,837
-281
| -13% | -$17.7K |
|
365
PUT
Mohawk Industries
MHK
$6.73B
| $10.7M | 0.03% |
852
+390
| +84% | +$50.8K |
|
366
CALL
Southwest Airlines
LUV
$23.3B
| $10.7M | 0.03% |
2,067
-88
| -4% | -$4.64K |
|
367
PUT
Intuit
INTU
$77.8B
| $10.7M | 0.03% |
408
-2
| -0.5% | -$462 |
|
368
CALL
RH
RH
$3.31B
| $10.7M | 0.03% |
1,036
+178
| +21% | +$24.2K |
|
|
APC
369
PUT
DELISTED
Anadarko Petroleum
APC
| $10.6M | 0.03% |
2,339
+1,864
| +392% | +$84.5K |
|
370
PUT
BHP
BHP
$215B
| $10.6M | 0.03% |
2,175
+518
| +31% | +$23.6K |
|
371
PUT
Estee Lauder
EL
$29.9B
| $10.5M | 0.03% |
637
+4
| +0.6% | +$587 |
|
|
XLNX
372
DELISTED
Xilinx Inc
XLNX
| $10.5M | 0.03% |
+83,024
| New | +$9.33M |
|
373
CALL
Xtrackers MSCI Emerging Markets Hedged Equity ETF
DBEM
$108M
| $10.5M | 0.03% |
3,634
+2,629
| +262% | +$58.3K |
|
|
LSI
374
PUT
DELISTED
Life Storage, Inc.
LSI
| $10.5M | 0.03% |
1,617
+192
| +13% | +$12.3K |
|
375
Salesforce
CRM
$133B
| $10.4M | 0.03% |
+65,976
| New | +$10.2M |
|
Similar funds
Simplex Trading's Q1 2019 Portfolio in Review
As of Q1 2019, Simplex Trading held 8,479 positions worth $36B, up 5.5% from $34.1B the previous quarter. Its ten largest holdings account for 35% of the portfolio.
Simplex Trading's Q1 2019 filing shows 1,472 new, 3,049 increased, 2,419 reduced and 1,324 closed positions. Its largest new stake was Walt Disney: 228,471 shares worth $25.4M. The largest sale was Amazon, an estimated $66M.
By sector, the portfolio is most concentrated in Communication Services at 0.58% of assets, up from 0.49% a quarter earlier, followed by Technology and Healthcare.
- Simplex Trading's largest Q1 2019 buy was Walt Disney: 228,471 shares worth $25.4M.
- Simplex Trading added most to Invesco QQQ Trust in Q1 2019, an estimated $86.9M increase.
- Simplex Trading's biggest Q1 2019 reduction was iShares Russell 2000 ETF, cutting an estimated $60.3M.
- Simplex Trading fully exited Amazon in Q1 2019, selling an estimated $66M.
- Simplex Trading's ten largest holdings make up 35% of its $36B portfolio in Q1 2019.
- Simplex Trading opened 1,472 new positions and closed 1,324 in Q1 2019.
- Simplex Trading's portfolio value rose 5.5% quarter-over-quarter to $36B.
Based on Simplex Trading's 13F filing for Q1 2019, filed 18 Apr 2019.