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 | |
|---|---|---|---|---|---|---|
501
CALL
Phillips 66
PSX
$86.1B
| $7.34M | 0.02% |
771
+60
| +8% | +$5.7K |
|
|
VMW
502
DELISTED
VMware, Inc
VMW
| $7.32M | 0.02% |
+40,532
| New | +$6.6M |
|
503
PUT
National Health Investors
NHI
$3.86B
| $7.31M | 0.02% |
931
+217
| +30% | +$17.2K |
|
504
PUT
Invesco CurrencyShares Euro Currency Trust
FXE
$331M
| $7.3M | 0.02% |
682
-738
| -52% | -$80K |
|
505
CALL
Best Buy
BBY
$18.2B
| $7.3M | 0.02% |
1,027
-933
| -48% | -$58.2K |
|
|
BNY
506
CALL
Bank of New York Mellon
BNY
$109B
| $7.28M | 0.02% |
1,444
+1,089
| +307% | +$56.1K |
|
507
CALL
VF Corp
VFC
$6.5B
| $7.22M | 0.02% |
883
+631
| +250% | +$49.2K |
|
508
CALL
MongoDB
MDB
$24.9B
| $7.22M | 0.02% |
491
+299
| +156% | +$30.7K |
|
509
PUT
Sea Limited
SE
$63.6B
| $7.18M | 0.02% |
3,053
+2,776
| +1,002% | +$48.6K |
|
510
CALL
Duke Energy
DUK
$99.6B
| $7.17M | 0.02% |
797
-365
| -31% | -$32.2K |
|
511
PUT
Universal Display
OLED
$3.74B
| $7.17M | 0.02% |
469
+18
| +4% | +$2.23K |
|
512
PUT
SAP
SAP
$174B
| $7.16M | 0.02% |
620
+312
| +101% | +$33.2K |
|
513
PUT
Petrobras
PBR
$124B
| $7.15M | 0.02% |
4,491
-1,944
| -30% | -$30.9K |
|
514
PUT
Cummins
CMI
$91.8B
| $7.13M | 0.02% |
452
+92
| +26% | +$13.8K |
|
515
CALL
Blackstone
BX
$149B
| $7.09M | 0.02% |
2,028
+339
| +20% | +$11.3K |
|
516
CALL
Honeywell
HON
$76.1B
| $7.09M | 0.02% |
772
-67
| -8% | -$9.36K |
|
517
PUT
Halliburton
HAL
$28B
| $7.07M | 0.02% |
2,412
-488
| -17% | -$14.7K |
|
518
CALL
iShares MSCI Global Gold Miners ETF
RING
$2.29B
| $7.02M | 0.02% |
1,328
-1,439
| -52% | -$24.7K |
|
|
X
519
PUT
DELISTED
US Steel
X
| $7.02M | 0.02% |
3,603
-306
| -8% | -$6.51K |
|
|
X
520
CALL
DELISTED
US Steel
X
| $7.02M | 0.02% |
3,600
-3,082
| -46% | -$65.6K |
|
521
PUT
ProShares UltraShort Health Care
RXD
$3.38M
| $7M | 0.02% |
575
-632
| -52% | -$58.5K |
|
522
CALL
MetLife
MET
$59.4B
| $6.96M | 0.02% |
1,634
+387
| +31% | +$17.1K |
|
523
PUT
Avis
CAR
$5.66B
| $6.95M | 0.02% |
1,995
+981
| +97% | +$29.4K |
|
524
PUT
CSX Corp
CSX
$98.1B
| $6.95M | 0.02% |
2,787
-654
| -19% | -$15.1K |
|
525
CALL
XPO
XPO
$25.2B
| $6.95M | 0.02% |
3,739
-1,619
| -30% | -$31.1K |
|
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.