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 | |
|---|---|---|---|---|---|---|
1251
CALL
Bank of Montreal
BMO
$125B
| $2.3M | 0.01% |
308
-249
| -45% | -$18.4K |
|
1252
CALL
Sprouts Farmers Market
SFM
$7.04B
| $2.29M | 0.01% |
1,065
-460
| -30% | -$10.8K |
|
1253
CALL
Jacobs Solutions
J
$15.9B
| $2.29M | 0.01% |
369
+173
| +88% | +$9.74K |
|
1254
CALL
Dropbox
DBX
$6.81B
| $2.29M | 0.01% |
1,049
+460
| +78% | +$10.7K |
|
1255
CALL
Cheesecake Factory
CAKE
$4.21B
| $2.28M | 0.01% |
467
+315
| +207% | +$14.5K |
|
|
GAP
1256
CALL
The Gap Inc
GAP
$6.84B
| $2.28M | 0.01% |
872
-362
| -29% | -$9.25K |
|
1257
CALL
Cooper Companies
COO
$13.7B
| $2.28M | 0.01% |
308
+272
| +756% | +$19K |
|
1258
State Street SPDR S&P Homebuilders ETF
XHB
$1.74B
| $2.28M | 0.01% |
+59,119
| New | +$2.19M |
|
1259
CALL
Mid-America Apartment Communities
MAA
$15.6B
| $2.27M | 0.01% |
208
+157
| +308% | +$16.1K |
|
1260
CALL
RingCentral
RNG
$4.05B
| $2.27M | 0.01% |
211
-202
| -49% | -$19.8K |
|
|
STMP
1261
DELISTED
Stamps.com, Inc.
STMP
| $2.27M | 0.01% |
27,933
+24,906
| +823% | +$3.5M |
|
1262
PUT
Akamai
AKAM
$16.8B
| $2.27M | 0.01% |
317
+185
| +140% | +$12.5K |
|
1263
PUT
Energy Transfer Partners
ET
$70.1B
| $2.27M | 0.01% |
1,480
-1,427
| -49% | -$21.2K |
|
|
FRC
1264
CALL
DELISTED
First Republic Bank
FRC
| $2.27M | 0.01% |
226
-154
| -41% | -$15.2K |
|
1265
CALL
Elevance Health
ELV
$81.9B
| $2.27M | 0.01% |
79
-78
| -50% | -$22.6K |
|
|
HDS
1266
PUT
DELISTED
HD Supply Holdings, Inc.
HDS
| $2.27M | 0.01% |
523
+505
| +2,806% | +$21K |
|
1267
PUT
Teleflex
TFX
$5.85B
| $2.27M | 0.01% |
+75
| New | +$20.9K |
|
|
WLL
1268
PUT
DELISTED
Whiting Petroleum Corporation
WLL
| $2.27M | 0.01% |
12
+9
| +300% | +$18.1K |
|
1269
PUT
Clorox
CLX
$11.6B
| $2.26M | 0.01% |
141
+10
| +8% | +$1.55K |
|
1270
CALL
Credit Acceptance
CACC
$6B
| $2.26M | 0.01% |
50
+47
| +1,567% | +$20.2K |
|
1271
CALL
Arrow Electronics
ARW
$10.9B
| $2.26M | 0.01% |
293
+288
| +5,760% | +$22.1K |
|
|
MOMO
1272
PUT
Hello Group
MOMO
$869M
| $2.26M | 0.01% |
590
-8
| -1% | -$256 |
|
1273
PUT
National Grid
NGG
$81.9B
| $2.25M | 0.01% |
457
-390
| -46% | -$18.9K |
|
1274
PUT
CBRE Group
CBRE
$40.8B
| $2.25M | 0.01% |
456
+396
| +660% | +$18.6K |
|
|
FITB
1275
CALL
Fifth Third Bancorp
FITB
$52B
| $2.25M | 0.01% |
892
-171
| -16% | -$4.55K |
|
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.