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 | |
|---|---|---|---|---|---|---|
|
PPLI
451
PUT
People Inc
PPLI
$3.23B
| $8.4M | 0.02% |
2,238
-1,807
| -45% | -$66.9K |
|
452
PUT
General Mills
GIS
$19.7B
| $8.39M | 0.02% |
1,622
+428
| +36% | +$19.4K |
|
453
CALL
Check Point Software Technologies
CHKP
$13.3B
| $8.37M | 0.02% |
662
+185
| +39% | +$21.5K |
|
454
PUT
Humana
HUM
$47.7B
| $8.32M | 0.02% |
313
-130
| -29% | -$37.5K |
|
455
CALL
CarMax
KMX
$8.15B
| $8.26M | 0.02% |
1,184
+794
| +204% | +$48.9K |
|
456
PUT
iShares Convertible Bond ETF
ICVT
$7.4B
| $8.23M | 0.02% |
2,447
+1,206
| +97% | +$68.2K |
|
457
CALL
TJX Companies
TJX
$172B
| $8.09M | 0.02% |
1,521
-579
| -28% | -$28.9K |
|
|
CTXS
458
CALL
DELISTED
Citrix Systems Inc
CTXS
| $8.08M | 0.02% |
811
+639
| +372% | +$66.3K |
|
459
CALL
S&P Global
SPGI
$127B
| $8.06M | 0.02% |
383
-254
| -40% | -$49.2K |
|
460
NVIDIA
NVDA
$5.14T
| $8.03M | 0.02% |
1,789,080
-722,240
| -29% | -$2.8M |
|
461
PUT
Williams-Sonoma
WSM
$26.2B
| $7.97M | 0.02% |
2,832
+2,472
| +687% | +$68.2K |
|
462
CALL
Kimberly-Clark
KMB
$36.1B
| $7.94M | 0.02% |
641
+35
| +6% | +$4.07K |
|
463
CALL
D.R. Horton
DHI
$40B
| $7.94M | 0.02% |
1,918
+307
| +19% | +$12K |
|
|
464
PUT
D.R. Horton
DHI
$40B
| $7.89M | 0.02% |
1,908
-368
| -16% | -$14.4K |
|
465
PUT
Lennar Class B
LEN.B
$19.4B
| $7.87M | 0.02% |
1,686
+212
| +14% | +$7.57K |
|
466
PUT
Truist Financial
TFC
$63.2B
| $7.85M | 0.02% |
1,688
+559
| +50% | +$27.3K |
|
467
CALL
Archer Daniels Midland
ADM
$42.1B
| $7.84M | 0.02% |
1,817
+534
| +42% | +$22.8K |
|
468
PUT
LyondellBasell Industries
LYB
$20.1B
| $7.83M | 0.02% |
931
+587
| +171% | +$50.7K |
|
|
WP
469
PUT
DELISTED
Worldpay, Inc.
WP
| $7.82M | 0.02% |
689
+102
| +17% | +$9.25K |
|
470
CALL
Yum! Brands
YUM
$40.7B
| $7.8M | 0.02% |
782
+98
| +14% | +$9.28K |
|
471
PUT
Verisk Analytics
VRSK
$25.2B
| $7.79M | 0.02% |
586
+234
| +66% | +$28.5K |
|
|
IDTI
472
CALL
DELISTED
Integrated Device Technology I
IDTI
| $7.76M | 0.02% |
1,584
+519
| +49% | +$25.1K |
|
473
PUT
Cognizant
CTSH
$20.4B
| $7.72M | 0.02% |
1,066
+292
| +38% | +$20.4K |
|
474
PUT
PVH
PVH
$3.69B
| $7.71M | 0.02% |
632
+57
| +10% | +$6.24K |
|
475
CALL
Wayfair
W
$11.1B
| $7.69M | 0.02% |
518
+90
| +21% | +$11.7K |
|
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.