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 | |
|---|---|---|---|---|---|---|
1276
Constellation Brands
STZ
$22.2B
| $2.52M | 0.01% |
13,308
+3,015
| +29% | +$569K |
|
|
LKFT
1277
CALL
Lakefront Biotherapeutics American Depositary Shares
LKFT
$1.83B
| $2.52M | 0.01% |
122
+9
| +8% | +$1.66K |
|
1278
CALL
Caesars Entertainment
CZR
$6.09B
| $2.52M | 0.01% |
423
+98
| +30% | +$4.85K |
|
1279
PUT
Prologis
PLD
$137B
| $2.52M | 0.01% |
283
-356
| -56% | -$31.6K |
|
|
KFYP
1280
PUT
DELISTED
KraneShares CICC China Leaders 100 Index ETF
KFYP
| $2.52M | 0.01% |
518
-1,232
| -70% | -$33.6K |
|
1281
PUT
Stanley Black & Decker
SWK
$14.1B
| $2.52M | 0.01% |
152
-25
| -14% | -$3.87K |
|
1282
BHP
BHP
$212B
| $2.51M | 0.01% |
+51,508
| New | +$2.34M |
|
|
JNPR
1283
CALL
DELISTED
Juniper Networks
JNPR
| $2.51M | 0.01% |
1,018
-659
| -39% | -$16.2K |
|
1284
CALL
Carter's
CRI
$1.41B
| $2.5M | 0.01% |
229
+228
| +22,800% | +$23.1K |
|
1285
Keysight
KEYS
$54B
| $2.5M | 0.01% |
24,369
+13,223
| +119% | +$1.35M |
|
1286
CALL
Owens Corning
OC
$11.4B
| $2.5M | 0.01% |
384
+341
| +793% | +$21.8K |
|
1287
CALL
DaVita
DVA
$15.2B
| $2.5M | 0.01% |
333
+133
| +67% | +$8.82K |
|
1288
PUT
Huntsman Corp
HUN
$2.26B
| $2.5M | 0.01% |
1,034
+530
| +105% | +$12.3K |
|
1289
CALL
Liberty Latin America Class C
LILAK
$1.5B
| $2.5M | 0.01% |
1,508
+86
| +6% | +$1.33K |
|
1290
CALL
Public Storage
PSA
$60.1B
| $2.49M | 0.01% |
117
-103
| -47% | -$22.9K |
|
1291
CALL
United States Oil Fund
USO
$2.44B
| $2.49M | 0.01% |
243
-480
| -66% | -$45.6K |
|
|
RTN
1292
DELISTED
Raytheon Company
RTN
| $2.49M | 0.01% |
11,334
-9,157
| -45% | -$1.94M |
|
1293
CALL
Stellantis
STLA
$16.5B
| $2.49M | 0.01% |
1,695
-427
| -20% | -$6.17K |
|
1294
PUT
Cognex
CGNX
$10.3B
| $2.49M | 0.01% |
444
+277
| +166% | +$14.3K |
|
1295
CALL
Bunge Global
BG
$23.7B
| $2.48M | 0.01% |
431
+79
| +22% | +$4.37K |
|
|
FL
1296
CALL
DELISTED
Foot Locker
FL
| $2.48M | 0.01% |
636
-455
| -42% | -$19.2K |
|
1297
PUT
Planet Fitness
PLNT
$4.25B
| $2.48M | 0.01% |
332
+101
| +44% | +$6.81K |
|
1298
Wayfair
W
$11.2B
| $2.48M | 0.01% |
+27,421
| New | +$2.56M |
|
1299
PUT
Factset
FDS
$9.08B
| $2.47M | 0.01% |
92
-667
| -88% | -$171K |
|
1300
CALL
Virgin Galactic
SPCE
$321M
| $2.47M | 0.01% |
+107
| New | +$20.9K |
|
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.