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 | |
|---|---|---|---|---|---|---|
2576
Global X Robotics & Artificial Intelligence ETF
BOTZ
$3.15B
| $990K | ﹤0.01% |
29,897
+27,736
| +1,283% | +$848K |
|
|
HOUS
2577
CALL
DELISTED
Anywhere Real Estate
HOUS
| $990K | ﹤0.01% |
755
-144
| -16% | -$1.72K |
|
2578
PUT
Range Resources
RRC
$9.11B
| $990K | ﹤0.01% |
1,479
+116
| +9% | +$852 |
|
|
SNBR
2579
CALL
DELISTED
Sleep Number
SNBR
| $990K | ﹤0.01% |
121
+90
| +290% | +$6.24K |
|
|
CCXI
2580
CALL
DELISTED
ChemoCentryx, Inc.
CCXI
| $990K | ﹤0.01% |
160
+122
| +321% | +$6.99K |
|
2581
CALL
Lincoln Electric
LECO
$13.8B
| $988K | ﹤0.01% |
+85
| New | +$9.31K |
|
2582
CALL
Banco Bilbao Vizcaya Argentaria
BBVA
$144B
| $987K | ﹤0.01% |
1,998
+506
| +34% | +$1.94K |
|
2583
WEC Energy
WEC
$37.7B
| $985K | ﹤0.01% |
10,711
+6,620
| +162% | +$644K |
|
2584
CALL
PagerDuty
PD
$700M
| $984K | ﹤0.01% |
236
-738
| -76% | -$25.2K |
|
2585
PUT
Groupon
GRPN
$980M
| $983K | ﹤0.01% |
259
-464
| -64% | -$12.7K |
|
2586
Nice
NICE
$5.29B
| $983K | ﹤0.01% |
3,468
+515
| +17% | +$125K |
|
2587
Eastern Bankshares
EBC
$5.25B
| $982K | ﹤0.01% |
+60,227
| New | +$855K |
|
|
SDC
2588
DELISTED
SmileDirectClub, Inc. Class A Common Stock
SDC
| $981K | ﹤0.01% |
82,175
-20,376
| -20% | -$231K |
|
|
ALLK
2589
PUT
DELISTED
Allakos
ALLK
| $980K | ﹤0.01% |
70
+64
| +1,067% | +$6.66K |
|
2590
CALL
TE Connectivity
TEL
$58.8B
| $980K | ﹤0.01% |
81
-323
| -80% | -$35.6K |
|
2591
CALL
Associated Banc-Corp
ASB
$5.81B
| $978K | ﹤0.01% |
574
+389
| +210% | +$5.91K |
|
2592
CALL
Healthcare Realty
HR
$7.42B
| $977K | ﹤0.01% |
355
+312
| +726% | +$8.23K |
|
|
SWCH
2593
CALL
DELISTED
Switch, Inc. Class A Common Stock
SWCH
| $977K | ﹤0.01% |
597
+23
| +4% | +$359 |
|
2594
PUT
FMC
FMC
$1.42B
| $976K | ﹤0.01% |
85
-73
| -46% | -$8.13K |
|
2595
CALL
Ligand Pharmaceuticals
LGND
$6.02B
| $974K | ﹤0.01% |
157
+88
| +128% | +$5.02K |
|
|
LOGC
2596
DELISTED
ContextLogic
LOGC
| $973K | ﹤0.01% |
+1,779
| New | +$1.1M |
|
2597
PUT
Americold
COLD
$4.09B
| $970K | ﹤0.01% |
260
+236
| +983% | +$8.49K |
|
2598
CALL
Kulicke & Soffa
KLIC
$5.3B
| $970K | ﹤0.01% |
305
-80
| -21% | -$2.33K |
|
|
PCH
2599
PUT
DELISTED
PotlatchDeltic
PCH
| $970K | ﹤0.01% |
194
+190
| +4,750% | +$8.74K |
|
2600
PUT
Toronto Dominion Bank
TD
$198B
| $970K | ﹤0.01% |
172
-82
| -32% | -$4.16K |
|
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.