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 | |
|---|---|---|---|---|---|---|
2376
PUT
Compass Minerals
CMP
$1.24B
| $657K | ﹤0.01% |
121
+67
| +124% | +$3.39K |
|
2377
Dropbox
DBX
$6.81B
| $657K | ﹤0.01% |
30,159
-51,765
| -63% | -$1.21M |
|
2378
CALL
Energous
WATT
$80.3M
| $657K | ﹤0.01% |
2
| – | – |
|
2379
CALL
MSCI
MSCI
$40B
| $656K | ﹤0.01% |
33
-19
| -37% | -$3.31K |
|
2380
CALL
Evergy
EVRG
$20.1B
| $655K | ﹤0.01% |
+113
| New | +$6.43K |
|
|
BPYU
2381
CALL
DELISTED
Brookfield Property REIT Inc. Class A Common Stock
BPYU
| $655K | ﹤0.01% |
320
+183
| +134% | +$3.47K |
|
|
SFIX
2382
PUT
Stitch Fix
SFIX
$478M
| $652K | ﹤0.01% |
231
+14
| +6% | +$348 |
|
2383
PUT
Mine Safety
MSA
$6.74B
| $651K | ﹤0.01% |
+63
| New | +$6.34K |
|
2384
CALL
Republic Services
RSG
$66.7B
| $651K | ﹤0.01% |
81
+79
| +3,950% | +$6.09K |
|
|
XLRN
2385
DELISTED
Acceleron Pharma
XLRN
| $651K | ﹤0.01% |
14,000
+12,598
| +899% | +$553K |
|
2386
PUT
Commercial Metals
CMC
$7.63B
| $650K | ﹤0.01% |
381
+371
| +3,710% | +$6.12K |
|
2387
PUT
Ryder
R
$10.3B
| $650K | ﹤0.01% |
105
-91
| -46% | -$5.33K |
|
2388
CALL
GATX Corp
GATX
$6.55B
| $649K | ﹤0.01% |
85
+82
| +2,733% | +$6.13K |
|
|
GES
2389
PUT
DELISTED
Guess Inc
GES
| $648K | ﹤0.01% |
331
+305
| +1,173% | +$6.46K |
|
|
TECD
2390
DELISTED
Tech Data Corp
TECD
| $648K | ﹤0.01% |
6,337
+4,979
| +367% | +$487K |
|
|
ARCH
2391
PUT
DELISTED
Arch Resources, Inc.
ARCH
| $648K | ﹤0.01% |
71
+14
| +25% | +$1.23K |
|
2392
Albemarle
ALB
$13.5B
| $647K | ﹤0.01% |
+7,893
| New | +$645K |
|
2393
CALL
Heron Therapeutics
HRTX
$86.3M
| $647K | ﹤0.01% |
265
+170
| +179% | +$4.45K |
|
|
WCN
2394
PUT
Waste Connections
WCN
$42.8B
| $646K | ﹤0.01% |
73
-88
| -55% | -$7.25K |
|
2395
Cboe Global Markets
CBOE
$29.8B
| $645K | ﹤0.01% |
6,764
+1,712
| +34% | +$162K |
|
2396
CALL
ON Semiconductor
ON
$33.8B
| $645K | ﹤0.01% |
314
+86
| +38% | +$1.77K |
|
|
ECHO
2397
PUT
EchoStar
ECHO
$25.5B
| $645K | ﹤0.01% |
218
+217
| +21,700% | +$6.84K |
|
|
NS
2398
PUT
DELISTED
NuStar Energy L.P.
NS
| $645K | ﹤0.01% |
240
+230
| +2,300% | +$5.95K |
|
|
ANDX
2399
CALL
DELISTED
Andeavor Logistics LP
ANDX
| $645K | ﹤0.01% |
183
+135
| +281% | +$4.79K |
|
2400
PUT
Banco Bilbao Vizcaya Argentaria
BBVA
$144B
| $644K | ﹤0.01% |
1,125
-708
| -39% | -$4.17K |
|
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.