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 | |
|---|---|---|---|---|---|---|
551
CALL
Agnico Eagle Mines
AEM
$71.6B
| $6.52M | 0.02% |
1,499
+789
| +111% | +$33.4K |
|
|
BBBY
552
PUT
DELISTED
Bed Bath & Beyond Inc
BBBY
| $6.51M | 0.02% |
3,835
+1,600
| +72% | +$24.2K |
|
553
PUT
Keysight
KEYS
$56B
| $6.5M | 0.02% |
746
+721
| +2,884% | +$56K |
|
554
PUT
Edison International
EIX
$30.7B
| $6.45M | 0.02% |
1,042
+863
| +482% | +$51.5K |
|
555
PUT
EOG Resources
EOG
$78.2B
| $6.44M | 0.02% |
677
-471
| -41% | -$44.9K |
|
556
PUT
Vale
VALE
$63.7B
| $6.44M | 0.02% |
4,930
-2,048
| -29% | -$26.5K |
|
557
PUT
DaVita
DVA
$14.9B
| $6.43M | 0.02% |
1,185
+430
| +57% | +$23.8K |
|
558
State Street Energy Select Sector SPDR ETF
XLE
$39.6B
| $6.43M | 0.02% |
+194,538
| New | +$6.25M |
|
559
PUT
Public Storage
PSA
$55.1B
| $6.42M | 0.02% |
295
+128
| +77% | +$26.8K |
|
560
Intuitive Surgical
ISRG
$119B
| $6.42M | 0.02% |
+33,753
| New | +$6M |
|
|
WCG
561
PUT
DELISTED
Wellcare Health Plans, Inc.
WCG
| $6.39M | 0.02% |
237
+184
| +347% | +$47.5K |
|
562
PUT
Norfolk Southern
NSC
$78.2B
| $6.39M | 0.02% |
342
-396
| -54% | -$68.5K |
|
563
CALL
American International
AIG
$41.6B
| $6.34M | 0.02% |
1,473
-762
| -34% | -$32.6K |
|
564
PUT
OSI Systems
OSIS
$3.44B
| $6.34M | 0.02% |
724
+303
| +72% | +$25.4K |
|
565
CALL
Nucor
NUE
$54.8B
| $6.33M | 0.02% |
1,084
+163
| +18% | +$9.56K |
|
566
CALL
Johnson Controls International
JCI
$87.7B
| $6.32M | 0.02% |
1,711
+53
| +3% | +$1.82K |
|
567
CALL
Lennar Class B
LEN.B
$19B
| $6.3M | 0.02% |
1,351
+476
| +54% | +$17K |
|
568
American Airlines Group
AAL
$8.96B
| $6.3M | 0.02% |
+198,358
| New | +$6.66M |
|
569
Las Vegas Sands
LVS
$30.5B
| $6.26M | 0.02% |
102,708
+48,244
| +89% | +$2.84M |
|
570
ConocoPhillips
COP
$148B
| $6.25M | 0.02% |
93,704
+81,731
| +683% | +$5.5M |
|
571
CALL
Sony
SONY
$121B
| $6.15M | 0.02% |
7,285
+4,215
| +137% | +$39.5K |
|
572
CALL
Trip.com Group
TCOM
$27B
| $6.13M | 0.02% |
1,404
+8
| +0.6% | +$281 |
|
|
573
CALL
Vale
VALE
$63.7B
| $6.12M | 0.02% |
4,689
+933
| +25% | +$12.1K |
|
574
PUT
General Dynamics
GD
$104B
| $6.11M | 0.02% |
361
-186
| -34% | -$31.3K |
|
575
PUT
Vanguard S&P 500 ETF
VOO
$967B
| $6.11M | 0.02% |
492
-750
| -60% | -$187K |
|
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.