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 | |
|---|---|---|---|---|---|---|
|
ARRY
3351
PUT
DELISTED
Array Biopharma Inc
ARRY
| $255K | ﹤0.01% |
105
+47
| +81% | +$979 |
|
|
SAFE
3352
CALL
DELISTED
Safehold Inc.
SAFE
| $255K | ﹤0.01% |
117
+17
| +17% | +$318 |
|
3353
PUT
Apple Hospitality REIT
APLE
$3.98B
| $254K | ﹤0.01% |
156
-67
| -30% | -$1.07K |
|
|
GES
3354
DELISTED
Guess Inc
GES
| $254K | ﹤0.01% |
+13,006
| New | +$276K |
|
3355
CALL
Olin
OLN
$2.49B
| $254K | ﹤0.01% |
110
+23
| +26% | +$550 |
|
3356
CALL
Sonos
SONO
$1.87B
| $254K | ﹤0.01% |
247
-519
| -68% | -$5.63K |
|
|
CONN
3357
DELISTED
Conn's Inc.
CONN
| $254K | ﹤0.01% |
+11,119
| New | +$240K |
|
3358
CALL
AZZ Inc
AZZ
$4.47B
| $253K | ﹤0.01% |
+62
| New | +$2.74K |
|
3359
PUT
Global Partners
GLP
$1.64B
| $253K | ﹤0.01% |
129
+84
| +187% | +$1.55K |
|
3360
CALL
Ironwood Pharmaceuticals
IRWD
$644M
| $253K | ﹤0.01% |
223
+16
| +8% | +$179 |
|
3361
CALL
Polaris
PII
$4.25B
| $253K | ﹤0.01% |
30
-23
| -43% | -$1.95K |
|
|
AMID
3362
PUT
DELISTED
American Midstream Partners, LP
AMID
| $253K | ﹤0.01% |
491
+145
| +42% | +$600 |
|
|
GMS
3363
CALL
DELISTED
GMS Inc
GMS
| $252K | ﹤0.01% |
+167
| New | +$3.02K |
|
3364
PUT
Pacific Biosciences
PACB
$422M
| $252K | ﹤0.01% |
349
-271
| -44% | -$1.96K |
|
3365
Pixelworks
PXLW
$37.9M
| $252K | ﹤0.01% |
5,357
+1,337
| +33% | +$59K |
|
|
AVP
3366
DELISTED
Avon Products, Inc.
AVP
| $252K | ﹤0.01% |
86,030
+76,417
| +795% | +$192K |
|
3367
CALL
Brixmor Property Group
BRX
$9.93B
| $251K | ﹤0.01% |
137
+33
| +32% | +$563 |
|
3368
PUT
Energizer
ENR
$1.44B
| $251K | ﹤0.01% |
56
-61
| -52% | -$2.81K |
|
3369
Element Solutions
ESI
$9.22B
| $251K | ﹤0.01% |
24,885
+21,100
| +557% | +$234K |
|
3370
PUT
Gildan
GIL
$9.38B
| $251K | ﹤0.01% |
70
-21
| -23% | -$718 |
|
3371
CALL
Nabors Industries
NBR
$1.16B
| $251K | ﹤0.01% |
15
+13
| +650% | +$2.02K |
|
|
DCH
3372
CALL
Dauch Corp
DCH
$1.32B
| $250K | ﹤0.01% |
175
-110
| -39% | -$1.59K |
|
3373
CALL
Badger Meter
BMI
$3.71B
| $250K | ﹤0.01% |
45
+19
| +73% | +$1.06K |
|
3374
PUT
FirstCash
FCFS
$9.06B
| $250K | ﹤0.01% |
29
+27
| +1,350% | +$2.25K |
|
3375
Magna International
MGA
$18.3B
| $249K | ﹤0.01% |
5,116
-14,215
| -74% | -$717K |
|
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.