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 |
Alibaba
BABA
|
+$39.9M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$39M |
| 3 |
Mastercard
MA
|
+$31.3M |
| 4 |
Apple
AAPL
|
+$25.3M |
| 5 |
Alphabet (Google) Class C
GOOG
|
+$25.1M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
JPMorgan Chase
JPM
|
+$52.8M |
| 2 |
TSMC
TSM
|
+$43M |
| 3 |
Amazon
AMZN
|
+$24.7M |
| 4 |
iShares Silver Trust
SLV
|
+$24.2M |
| 5 |
Netflix
NFLX
|
+$21.1M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 0.65% |
| 2 | Technology | 0.37% |
| 3 | Healthcare | 0.33% |
| 4 | Industrials | 0.21% |
| 5 | Communication Services | 0.19% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
251
CALL
Accenture
ACN
$84.8B
| $31.7M | 0.04% |
1,213
-318
| -21% | -$76.2K |
|
252
CALL
Okta
OKTA
$23.4B
| $31.5M | 0.04% |
1,239
-284
| -19% | -$67.5K |
|
253
PUT
ASML
ASML
$691B
| $31.4M | 0.04% |
644
+342
| +113% | +$144K |
|
254
CALL
Enphase Energy
ENPH
$5.05B
| $31.3M | 0.04% |
1,785
-230
| -11% | -$29.2K |
|
255
PUT
Unity
U
$12.4B
| $31.2M | 0.04% |
2,036
+1,827
| +874% | +$222K |
|
256
PUT
Amgen
AMGN
$199B
| $31.1M | 0.04% |
1,351
+286
| +27% | +$65.9K |
|
|
WORK
257
CALL
DELISTED
Slack Technologies, Inc.
WORK
| $31M | 0.04% |
7,344
-2,603
| -26% | -$88K |
|
258
CALL
iShares Core MSCI Emerging Markets ETF
IEMG
$152B
| $31M | 0.04% |
4,848
+344
| +8% | +$19.8K |
|
259
CALL
Spotify
SPOT
$96.9B
| $30.8M | 0.04% |
980
-595
| -38% | -$168K |
|
260
CALL
Fastly Inc
FSLY
$3.1B
| $30.7M | 0.04% |
3,512
+1,592
| +83% | +$140K |
|
261
CALL
AstraZeneca
AZN
$261B
| $30.6M | 0.04% |
3,061
+1,176
| +62% | +$125K |
|
262
CALL
Wayfair
W
$10.6B
| $30.6M | 0.04% |
1,355
+300
| +28% | +$79.6K |
|
263
PUT
Medtronic
MDT
$105B
| $30.6M | 0.04% |
2,611
-27
| -1% | -$2.97K |
|
264
CALL
Ulta Beauty
ULTA
$20.6B
| $30.5M | 0.04% |
1,062
+27
| +3% | +$6.83K |
|
265
PUT
Honeywell
HON
$77.4B
| $30.1M | 0.04% |
1,502
+587
| +64% | +$107K |
|
266
PUT
DraftKings
DKNG
$11.3B
| $30M | 0.04% |
6,443
+2,798
| +77% | +$133K |
|
|
267
Apple
AAPL
$4.71T
| $29.9M | 0.04% |
225,647
+210,236
| +1,364% | +$25.3M |
|
268
PUT
Chewy
CHWY
$8.45B
| $29.7M | 0.04% |
3,306
+499
| +18% | +$36.4K |
|
|
PARA
269
PUT
DELISTED
Paramount Global Class B
PARA
| $29.7M | 0.04% |
7,976
+2,509
| +46% | +$80.5K |
|
270
CALL
Simon Property Group
SPG
$72.8B
| $29.6M | 0.04% |
3,470
-379
| -10% | -$28.9K |
|
|
COUP
271
CALL
DELISTED
Coupa Software Incorporated
COUP
| $29.5M | 0.04% |
870
+6
| +0.7% | +$1.85K |
|
272
State Street SPDR S&P 500 ETF Trust
SPY
$777B
| $29.4M | 0.04% |
78,630
+63,307
| +413% | +$22.5M |
|
273
PUT
PepsiCo
PEP
$184B
| $29.4M | 0.04% |
1,980
-1,929
| -49% | -$274K |
|
274
PUT
Union Pacific
UNP
$180B
| $29.4M | 0.04% |
1,410
+336
| +31% | +$67.1K |
|
275
CALL
Bilibili
BILI
$7.29B
| $28.9M | 0.04% |
3,366
+1,879
| +126% | +$110K |
|
Similar funds
Simplex Trading's Q4 2020 Portfolio in Review
As of Q4 2020, Simplex Trading held 9,568 positions worth $77.2B, up 5% from $73.5B the previous quarter. Its ten largest holdings account for 42% of the portfolio.
Simplex Trading's Q4 2020 filing shows 1,711 new, 3,402 increased, 3,106 reduced and 1,157 closed positions. Its largest new stake was Alibaba: 143,630 shares worth $33.4M. The largest sale was JPMorgan Chase, an estimated $52.8M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 0.65% of assets, up from 0.53% a quarter earlier, followed by Technology and Healthcare.
- Simplex Trading's largest Q4 2020 buy was Alibaba: 143,630 shares worth $33.4M.
- Simplex Trading added most to Invesco QQQ Trust in Q4 2020, an estimated $39M increase.
- Simplex Trading's biggest Q4 2020 reduction was JPMorgan Chase, cutting an estimated $52.8M.
- Simplex Trading fully exited Target in Q4 2020, selling an estimated $14.3M.
- Simplex Trading's ten largest holdings make up 42% of its $77.2B portfolio in Q4 2020.
- Simplex Trading opened 1,711 new positions and closed 1,157 in Q4 2020.
- Simplex Trading's portfolio value rose 5% quarter-over-quarter to $77.2B.
Based on Simplex Trading's 13F filing for Q4 2020, filed 2 Feb 2021.