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 | |
|---|---|---|---|---|---|---|
676
PUT
ChargePoint
CHPT
$151M
| $8.24M | 0.01% |
+103
| New | +$51.8K |
|
|
GAP
677
CALL
The Gap Inc
GAP
$7.07B
| $8.24M | 0.01% |
4,083
-1,535
| -27% | -$32.2K |
|
678
PUT
ProShares Ultra Bloomberg Natural Gas
BOIL
$422M
| $8.22M | 0.01% |
12
-3
| -20% | -$18.6K |
|
679
CALL
ClearShares Piton Intermediate Fixed Income ETF
PIFI
$97.5M
| $8.2M | 0.01% |
+3,643
| New | +$364K |
|
680
PUT
Dave & Buster's
PLAY
$355M
| $8.19M | 0.01% |
2,729
+627
| +30% | +$13.9K |
|
681
PUT
Workhorse Group
WKHS
$30.4M
| $8.18M | 0.01% |
1
-1
| -50% | -$65K |
|
682
PUT
Macy's
M
$6.4B
| $8.16M | 0.01% |
7,253
+785
| +12% | +$6.72K |
|
683
PUT
Synopsys
SNPS
$72.3B
| $8.09M | 0.01% |
312
+112
| +56% | +$25.8K |
|
684
CALL
Automatic Data Processing
ADP
$97.2B
| $8.05M | 0.01% |
457
-171
| -27% | -$28.1K |
|
685
iShares China Large-Cap ETF
FXI
$4.29B
| $8.05M | 0.01% |
173,380
+144,612
| +503% | +$6.6M |
|
686
CALL
GSK
GSK
$102B
| $8.04M | 0.01% |
1,747
+430
| +33% | +$19.8K |
|
687
United States Oil Fund
USO
$2.36B
| $8.04M | 0.01% |
243,474
-101,252
| -29% | -$3M |
|
688
PUT
Tyson Foods
TSN
$20.1B
| $8.02M | 0.01% |
1,245
-335
| -21% | -$20.8K |
|
689
CALL
Omnicom Group
OMC
$22.6B
| $7.99M | 0.01% |
1,281
-541
| -30% | -$30.9K |
|
690
CALL
Fortinet
FTNT
$114B
| $7.98M | 0.01% |
2,685
+1,010
| +60% | +$25.5K |
|
691
CALL
Caesars Entertainment
CZR
$6.1B
| $7.95M | 0.01% |
1,071
-1,834
| -63% | -$115K |
|
692
PUT
First Trust Natural Gas ETF
FCG
$636M
| $7.94M | 0.01% |
568
-546
| -49% | -$4.16K |
|
693
PUT
Vail Resorts
MTN
$5.16B
| $7.92M | 0.01% |
284
+36
| +15% | +$9.3K |
|
694
CALL
M&T Bank
MTB
$36.3B
| $7.89M | 0.01% |
620
+459
| +285% | +$52.3K |
|
695
CALL
Teck Resources
TECK
$28B
| $7.87M | 0.01% |
4,337
+1,500
| +53% | +$23.1K |
|
696
Citigroup
C
$222B
| $7.87M | 0.01% |
127,574
-196,789
| -61% | -$10M |
|
697
CALL
United Rentals
URI
$64.8B
| $7.86M | 0.01% |
339
-171
| -34% | -$36.1K |
|
698
Fair Isaac
FICO
$28.3B
| $7.81M | 0.01% |
+15,281
| New | +$7.11M |
|
699
CALL
ProShares Ultra S&P500
SSO
$8.02B
| $7.8M | 0.01% |
4,308
-4,488
| -51% | -$92.2K |
|
700
CALL
LyondellBasell Industries
LYB
$20.1B
| $7.79M | 0.01% |
850
+506
| +147% | +$41.2K |
|
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.