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 | |
|---|---|---|---|---|---|---|
1601
PUT
SL Green Realty
SLG
$3.88B
| $2.37M | ﹤0.01% |
387
+6
| +2% | +$317 |
|
|
SAGE
1602
PUT
DELISTED
Sage Therapeutics
SAGE
| $2.37M | ﹤0.01% |
274
-657
| -71% | -$48.4K |
|
|
CS
1603
PUT
DELISTED
Credit Suisse Group
CS
| $2.37M | ﹤0.01% |
1,850
-195
| -10% | -$2.26K |
|
|
MITT
1604
PUT
TPG Mortgage Investment Trust
MITT
$230M
| $2.37M | ﹤0.01% |
2,675
+213
| +9% | +$1.91K |
|
|
CALY
1605
CALL
Callaway Golf Company
CALY
$3.26B
| $2.37M | ﹤0.01% |
986
+796
| +419% | +$16.2K |
|
1606
Cedar Fair
FUN
$1.78B
| $2.37M | ﹤0.01% |
+60,157
| New | +$2M |
|
1607
PUT
American Eagle Outfitters
AEO
$2.85B
| $2.36M | ﹤0.01% |
1,178
+657
| +126% | +$11K |
|
1608
PUT
Regions Financial
RF
$26.3B
| $2.36M | ﹤0.01% |
1,466
+690
| +89% | +$9.98K |
|
1609
CALL
Western Alliance Bancorporation
WAL
$9.07B
| $2.36M | ﹤0.01% |
394
+213
| +118% | +$10.4K |
|
1610
iShares MSCI Taiwan ETF
EWT
$10B
| $2.36M | ﹤0.01% |
+44,483
| New | +$2.17M |
|
1611
PUT
AGNC Investment
AGNC
$12.3B
| $2.36M | ﹤0.01% |
1,512
-1,636
| -52% | -$24.2K |
|
|
PXD
1612
DELISTED
Pioneer Natural Resource Co.
PXD
| $2.35M | ﹤0.01% |
+20,682
| New | +$2.01M |
|
|
PPLI
1613
CALL
People Inc
PPLI
$3.1B
| $2.35M | ﹤0.01% |
236
+9
| +4% | +$690 |
|
1614
Regeneron Pharmaceuticals
REGN
$68.8B
| $2.35M | ﹤0.01% |
4,860
+251
| +5% | +$135K |
|
|
BFX
1615
CALL
DELISTED
BowFlex Inc.
BFX
| $2.35M | ﹤0.01% |
1,294
+573
| +79% | +$11.9K |
|
1616
PUT
Molson Coors Class B
TAP
$7.68B
| $2.35M | ﹤0.01% |
519
-196
| -27% | -$8.08K |
|
1617
Advanced Micro Devices
AMD
$851B
| $2.34M | ﹤0.01% |
+25,565
| New | +$2.21M |
|
1618
CALL
Goodyear
GT
$2.07B
| $2.34M | ﹤0.01% |
2,149
+829
| +63% | +$8.35K |
|
1619
iShares Gold Trust
IAU
$63B
| $2.34M | ﹤0.01% |
64,664
+22,132
| +52% | +$792K |
|
1620
CALL
Rackspace Technology
RXT
$1B
| $2.34M | ﹤0.01% |
1,229
+735
| +149% | +$13.3K |
|
1621
CALL
SelectQuote
SLQT
$114M
| $2.34M | ﹤0.01% |
1,129
+898
| +389% | +$18.4K |
|
1622
PUT
Wabtec
WAB
$51.1B
| $2.34M | ﹤0.01% |
320
+210
| +191% | +$14.4K |
|
1623
CALL
Ingersoll Rand
IR
$33B
| $2.34M | ﹤0.01% |
514
-44
| -8% | -$1.82K |
|
1624
PUT
CONMED
CNMD
$1.29B
| $2.34M | ﹤0.01% |
209
+203
| +3,383% | +$19.2K |
|
1625
CALL
BorgWarner
BWA
$13.2B
| $2.33M | ﹤0.01% |
686
+192
| +39% | +$6.51K |
|
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.