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 |
Tesla
TSLA
|
+$33.5M |
| 2 |
Netflix
NFLX
|
+$22.8M |
| 3 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$20.9M |
| 4 |
TWX
Time Warner Inc
TWX
|
+$18.3M |
| 5 |
Alibaba
BABA
|
+$15.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$71.1M |
| 2 |
Micron Technology
MU
|
+$43.8M |
| 3 |
Alphabet (Google) Class C
GOOG
|
+$26.3M |
| 4 |
Booking.com
BKNG
|
+$22.2M |
| 5 |
Boeing
BA
|
+$21.6M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 7.87% |
| 2 | Communication Services | 7.14% |
| 3 | Technology | 6.23% |
| 4 | Financials | 5.5% |
| 5 | Healthcare | 5.2% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
2376
CALL
Citi Trends
CTRN
$543M
| $53K | ﹤0.01% |
+77
| New | +$1.89K |
|
2377
PUT
DigitalBridge
DBRG
$2.93B
| $53K | ﹤0.01% |
56
+50
| +833% | +$1.63K |
|
2378
CALL
Editas Medicine
EDIT
$411M
| $53K | ﹤0.01% |
219
+64
| +41% | +$2.28K |
|
2379
FTI Consulting
FCN
$4.88B
| $53K | ﹤0.01% |
+1,109
| New | +$50.1K |
|
2380
PUT
Hewlett Packard
HPE
$63.8B
| $53K | ﹤0.01% |
976
-493
| -34% | -$8.38K |
|
2381
PUT
HubSpot
HUBS
$11.4B
| $53K | ﹤0.01% |
370
+332
| +874% | +$34.6K |
|
2382
PUT
PennantPark Floating Rate Capital
PFLT
$692M
| $53K | ﹤0.01% |
+57
| New | +$752 |
|
2383
CALL
Precigen
PGEN
$1.93B
| $53K | ﹤0.01% |
562
-74
| -12% | -$1.06K |
|
|
PPL
2384
CALL
PPL Corp
PPL
$27.1B
| $53K | ﹤0.01% |
1,150
+499
| +77% | +$14.9K |
|
2385
CALL
Raymond James Financial
RJF
$33.3B
| $53K | ﹤0.01% |
369
-537
| -59% | -$33.4K |
|
2386
PUT
ScottsMiracle-Gro
SMG
$4.06B
| $53K | ﹤0.01% |
58
-13
| -18% | -$1.24K |
|
2387
PUT
Tronox
TROX
$973M
| $53K | ﹤0.01% |
258
-200
| -44% | -$3.98K |
|
|
SAIL
2388
PUT
DELISTED
SailPoint Technologies Holdings, Inc. Common Stock
SAIL
| $53K | ﹤0.01% |
+253
| New | +$4.63K |
|
|
CA
2389
CALL
DELISTED
CA, Inc.
CA
| $53K | ﹤0.01% |
1,704
+1,245
| +271% | +$43.3K |
|
2390
PUT
Agilent Technologies
A
$38.9B
| $52K | ﹤0.01% |
301
+94
| +45% | +$6.59K |
|
2391
American Public Education
APEI
$907M
| $52K | ﹤0.01% |
+1,217
| New | +$37.3K |
|
2392
PUT
AptarGroup
ATR
$8.51B
| $52K | ﹤0.01% |
+515
| New | +$45.4K |
|
2393
PUT
BGC Group
BGC
$5.65B
| $52K | ﹤0.01% |
639
+553
| +643% | +$4.98K |
|
2394
Brookfield
BN
$103B
| $52K | ﹤0.01% |
+3,750
| New | +$54.3K |
|
2395
BOK Financial
BOKF
$8.58B
| $52K | ﹤0.01% |
+530
| New | +$51.1K |
|
2396
PUT
Avis
CAR
$5.78B
| $52K | ﹤0.01% |
344
-477
| -58% | -$21.5K |
|
2397
CALL
Canadian Imperial Bank of Commerce
CM
$108B
| $52K | ﹤0.01% |
422
+186
| +79% | +$8.72K |
|
2398
CALL
Golar LNG
GLNG
$4.99B
| $52K | ﹤0.01% |
139
-189
| -58% | -$5.33K |
|
2399
PUT
Corning
GLW
$123B
| $52K | ﹤0.01% |
382
+271
| +244% | +$8.35K |
|
2400
Green Plains
GPRE
$1.15B
| $52K | ﹤0.01% |
3,108
+1,391
| +81% | +$25K |
|
Similar funds
Simplex Trading's Q1 2018 Portfolio in Review
As of Q1 2018, Simplex Trading held 7,591 positions worth $2.27B, down 2.1% from $2.32B the previous quarter. Its ten largest holdings account for 18% of the portfolio.
Simplex Trading withdrew a net $210M in Q1 2018, closing 1,502 positions and reducing 2,267 holdings. Its most notable exit was Alphabet (Google) Class C, an estimated $26.3M position sold in full.
By sector, the portfolio is most concentrated in Consumer Discretionary at 7.9% of assets, down from 11% a quarter earlier, followed by Communication Services and Technology.
Against the trend, Simplex Trading opened a new position in Tesla worth $27.1M.
- Simplex Trading's largest Q1 2018 buy was Tesla: 1,525,035 shares worth $27.1M.
- Simplex Trading added most to Netflix in Q1 2018, an estimated $22.8M increase.
- Simplex Trading's biggest Q1 2018 reduction was Amazon, cutting an estimated $71.1M.
- Simplex Trading fully exited Alphabet (Google) Class C in Q1 2018, selling an estimated $26.3M.
- Simplex Trading's ten largest holdings make up 18% of its $2.27B portfolio in Q1 2018.
- Simplex Trading opened 1,643 new positions and closed 1,502 in Q1 2018.
- Simplex Trading's portfolio value fell 2.1% quarter-over-quarter to $2.27B.
Based on Simplex Trading's 13F filing for Q1 2018, filed 26 Apr 2018.