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 |
Apple
AAPL
|
+$70.1M |
| 2 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$46.6M |
| 3 |
Alphabet (Google) Class C
GOOG
|
+$37.4M |
| 4 |
Amazon
AMZN
|
+$37M |
| 5 |
Tesla
TSLA
|
+$28M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Alibaba
BABA
|
+$41M |
| 2 |
Boeing
BA
|
+$27.8M |
| 3 |
Biogen
BIIB
|
+$18.9M |
| 4 |
SPDR Gold Trust
GLD
|
+$18.3M |
| 5 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$13.6M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.75% |
| 2 | Consumer Discretionary | 0.58% |
| 3 | Communication Services | 0.33% |
| 4 | Healthcare | 0.31% |
| 5 | Industrials | 0.19% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
OPTU
1201
CALL
Optimum Communications Inc
OPTU
$323M
| $2.82M | 0.01% |
1,032
+596
| +137% | +$16.5K |
|
1202
PUT
Crocs
CROX
$6.81B
| $2.81M | 0.01% |
672
-20
| -3% | -$699 |
|
1203
CALL
Dropbox
DBX
$6.84B
| $2.81M | 0.01% |
1,571
-865
| -36% | -$16.3K |
|
1204
PUT
Welltower
WELL
$176B
| $2.81M | 0.01% |
344
-305
| -47% | -$26.1K |
|
|
KL
1205
PUT
DELISTED
Kirkland Lake Gold Ltd Ordinary
KL
| $2.81M | 0.01% |
637
-251
| -28% | -$11.1K |
|
1206
CALL
HDFC Bank
HDB
$121B
| $2.8M | 0.01% |
884
-648
| -42% | -$19.7K |
|
1207
PUT
Restaurant Brands International
QSR
$25.3B
| $2.8M | 0.01% |
439
+203
| +86% | +$13.6K |
|
1208
CALL
Marriott International
MAR
$98.8B
| $2.79M | 0.01% |
184
-2
| -1% | -$268 |
|
|
K
1209
PUT
DELISTED
Kellanova
K
| $2.78M | 0.01% |
428
-408
| -49% | -$24.7K |
|
1210
PUT
Paychex
PAYX
$40.3B
| $2.77M | 0.01% |
326
+143
| +78% | +$12.1K |
|
1211
Carnival Corporation Ltd
CCL
$36.8B
| $2.77M | 0.01% |
+54,441
| New | +$2.43M |
|
1212
PUT
Essex Property Trust
ESS
$18.9B
| $2.77M | 0.01% |
92
-385
| -81% | -$122K |
|
1213
CALL
Raymond James Financial
RJF
$32.4B
| $2.76M | 0.01% |
464
+321
| +224% | +$18.5K |
|
1214
Capri Holdings
CPRI
$1.81B
| $2.76M | 0.01% |
72,412
+33,537
| +86% | +$1.16M |
|
1215
CALL
Guardant Health
GH
$19.6B
| $2.76M | 0.01% |
353
+102
| +41% | +$7.35K |
|
|
EMBJ
1216
PUT
Embraer S.A. ADS
EMBJ
$11.7B
| $2.76M | 0.01% |
1,415
+523
| +59% | +$9.2K |
|
1217
PUT
C.H. Robinson
CHRW
$22.2B
| $2.75M | 0.01% |
352
+122
| +53% | +$9.71K |
|
1218
PUT
First American
FAF
$7.68B
| $2.75M | 0.01% |
+472
| New | +$28.8K |
|
1219
Nutanix
NTNX
$14.5B
| $2.75M | 0.01% |
88,021
+16,484
| +23% | +$487K |
|
1220
CALL
The Mosaic Company
MOS
$7.12B
| $2.74M | 0.01% |
1,268
+115
| +10% | +$2.28K |
|
|
JOYY
1221
PUT
JOYY Inc
JOYY
$3.73B
| $2.74M | 0.01% |
519
-99
| -16% | -$5.83K |
|
1222
Bread Financial
BFH
$4.13B
| $2.73M | 0.01% |
30,549
+18,544
| +154% | +$1.64M |
|
1223
PUT
National Beverage
FIZZ
$2.87B
| $2.73M | 0.01% |
1,072
+764
| +248% | +$18.4K |
|
1224
CALL
Toll Brothers
TOL
$14.2B
| $2.73M | 0.01% |
692
-496
| -42% | -$19.8K |
|
1225
CALL
S&P Global
SPGI
$126B
| $2.73M | 0.01% |
100
-233
| -70% | -$60.5K |
|
Similar funds
Simplex Trading's Q4 2019 Portfolio in Review
As of Q4 2019, Simplex Trading held 8,523 positions worth $45.7B, up 30% from $35.2B the previous quarter. Its ten largest holdings account for 39% of the portfolio.
Simplex Trading's Q4 2019 filing shows 1,277 new, 3,072 increased, 2,710 reduced and 1,251 closed positions. Its largest new stake was Apple: 1,090,316 shares worth $80M. The largest sale was Alibaba, an estimated $41M.
By sector, the portfolio is most concentrated in Technology at 0.75% of assets, up from 0.48% a quarter earlier, followed by Consumer Discretionary and Communication Services.
- Simplex Trading's largest Q4 2019 buy was Apple: 1,090,316 shares worth $80M.
- Simplex Trading added most to iShares 20+ Year Treasury Bond ETF in Q4 2019, an estimated $46.6M increase.
- Simplex Trading's biggest Q4 2019 reduction was Alibaba, cutting an estimated $41M.
- Simplex Trading fully exited Boeing in Q4 2019, selling an estimated $27.8M.
- Simplex Trading's ten largest holdings make up 39% of its $45.7B portfolio in Q4 2019.
- Simplex Trading opened 1,277 new positions and closed 1,251 in Q4 2019.
- Simplex Trading's portfolio value rose 30% quarter-over-quarter to $45.7B.
Based on Simplex Trading's 13F filing for Q4 2019, filed 5 Feb 2020.