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 | |
|---|---|---|---|---|---|---|
226
CALL
Gilead Sciences
GILD
$163B
| $36.4M | 0.05% |
6,249
-7,029
| -53% | -$424K |
|
227
PUT
Carnival Corporation Ltd
CCL
$35.4B
| $36.3M | 0.05% |
16,781
+3,662
| +28% | +$65.1K |
|
|
228
PUT
Gilead Sciences
GILD
$163B
| $36.2M | 0.05% |
6,216
-1,110
| -15% | -$67K |
|
|
SPLK
229
CALL
DELISTED
Splunk Inc
SPLK
| $36.2M | 0.05% |
2,129
+659
| +45% | +$126K |
|
230
PUT
Bilibili
BILI
$7.4B
| $36M | 0.05% |
4,197
-436
| -9% | -$25.5K |
|
231
PUT
WIX.com
WIX
$2.13B
| $35.7M | 0.05% |
1,428
+549
| +62% | +$145K |
|
232
CALL
Broadcom
AVGO
$1.81T
| $35.3M | 0.05% |
8,070
-5,000
| -38% | -$195K |
|
233
PUT
Wells Fargo
WFC
$266B
| $34.8M | 0.05% |
11,546
-7,283
| -39% | -$189K |
|
234
PUT
Pfizer
PFE
$143B
| $34.8M | 0.05% |
22,832
+5,356
| +31% | +$196K |
|
|
ATVI
235
CALL
DELISTED
Activision Blizzard
ATVI
| $34.7M | 0.05% |
3,739
-630
| -14% | -$51.2K |
|
|
SPLK
236
PUT
DELISTED
Splunk Inc
SPLK
| $34.7M | 0.04% |
2,040
+819
| +67% | +$157K |
|
237
CALL
American Airlines Group
AAL
$9.87B
| $34.6M | 0.04% |
21,958
-5,526
| -20% | -$76.6K |
|
238
PUT
Take-Two Interactive
TTWO
$43.6B
| $34.6M | 0.04% |
1,663
+204
| +14% | +$35.7K |
|
239
CALL
CrowdStrike
CRWD
$196B
| $33.7M | 0.04% |
6,372
-8,528
| -57% | -$332K |
|
|
240
Mastercard
MA
$475B
| $33.6M | 0.04% |
+94,151
| New | +$31.3M |
|
|
241
Alibaba
BABA
$278B
| $33.4M | 0.04% |
+143,630
| New | +$39.9M |
|
242
PUT
Capital One
COF
$124B
| $33.4M | 0.04% |
3,376
-471
| -12% | -$40K |
|
243
PUT
3M
MMM
$90.3B
| $33.3M | 0.04% |
2,280
-150
| -6% | -$21.3K |
|
244
CALL
Mercado Libre
MELI
$91B
| $32.7M | 0.04% |
195
+66
| +51% | +$93.1K |
|
245
CALL
McDonald's
MCD
$188B
| $32.5M | 0.04% |
1,513
-2,370
| -61% | -$515K |
|
246
PUT
Carvana
CVNA
$45.1B
| $32.4M | 0.04% |
6,755
-8,180
| -55% | -$374K |
|
247
CALL
Charter Communications
CHTR
$15.9B
| $32.3M | 0.04% |
488
+4
| +0.8% | +$2.55K |
|
248
PUT
Occidental Petroleum
OXY
$57.3B
| $32.2M | 0.04% |
10,443
-219
| -2% | -$3K |
|
249
CALL
Illumina
ILMN
$28.7B
| $31.9M | 0.04% |
886
+306
| +53% | +$97.5K |
|
250
PUT
Lam Research
LRCX
$392B
| $31.7M | 0.04% |
6,720
-4,630
| -41% | -$195K |
|
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.