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 |
Amazon
AMZN
|
+$102M |
| 2 |
TSMC
TSM
|
+$27.8M |
| 3 |
JPMorgan Chase
JPM
|
+$22.4M |
| 4 |
Boeing
BA
|
+$19.4M |
| 5 |
ExxonMobil
XOM
|
+$14.7M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
SPDR Gold Trust
GLD
|
+$95.5M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$79.6M |
| 3 |
Tesla
TSLA
|
+$75.3M |
| 4 |
NVIDIA
NVDA
|
+$51.6M |
| 5 |
iShares MSCI EAFE ETF
EFA
|
+$40.5M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 0.53% |
| 2 | Technology | 0.4% |
| 3 | Healthcare | 0.22% |
| 4 | Financials | 0.21% |
| 5 | Communication Services | 0.18% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
3426
CALL
Pediatrix Medical
MD
$2.15B
| $350K | ﹤0.01% |
215
+112
| +109% | +$2.08K |
|
|
ONT
3427
PUT
Onterris Inc
ONT
$718M
| $350K | ﹤0.01% |
+147
| New | +$3.73K |
|
3428
CALL
Omnicell
OMCL
$1.89B
| $350K | ﹤0.01% |
47
+46
| +4,600% | +$3.19K |
|
|
RETA
3429
CALL
DELISTED
Reata Pharmaceuticals, Inc. Class A Common Stock
RETA
| $350K | ﹤0.01% |
36
-28
| -44% | -$3.5K |
|
3430
PUT
Walker & Dunlop
WD
$1.69B
| $349K | ﹤0.01% |
66
+39
| +144% | +$2.05K |
|
|
BGFV
3431
CALL
DELISTED
Big 5 Sporting Goods
BGFV
| $348K | ﹤0.01% |
466
+406
| +677% | +$2.15K |
|
3432
Casey's General Stores
CASY
$31.6B
| $348K | ﹤0.01% |
1,963
-1,848
| -48% | -$312K |
|
3433
CALL
Domo
DOMO
$161M
| $348K | ﹤0.01% |
91
-60
| -40% | -$2.16K |
|
3434
Bank of Montreal
BMO
$125B
| $347K | ﹤0.01% |
+5,948
| New | +$344K |
|
|
ICAD
3435
DELISTED
iCAD Inc
ICAD
| $347K | ﹤0.01% |
+39,408
| New | +$389K |
|
3436
Sunoco
SUN
$14B
| $347K | ﹤0.01% |
14,250
+8,768
| +160% | +$221K |
|
|
NVTA
3437
DELISTED
Invitae Corporation
NVTA
| $347K | ﹤0.01% |
8,010
+7,510
| +1,502% | +$256K |
|
3438
PUT
Arbor Realty Trust
ABR
$977M
| $346K | ﹤0.01% |
302
-109
| -27% | -$1.14K |
|
|
BCLI
3439
PUT
DELISTED
BRAINSTORM CELL THERAPUTC
BCLI
| $346K | ﹤0.01% |
14
+4
| +40% | +$819 |
|
3440
Meritage Homes
MTH
$4.89B
| $346K | ﹤0.01% |
+6,286
| New | +$301K |
|
3441
CALL
Skywest
SKYW
$4.37B
| $346K | ﹤0.01% |
116
-77
| -40% | -$2.4K |
|
|
WMC
3442
CALL
DELISTED
Western Asset Mortgage Capital Corporation
WMC
| $346K | ﹤0.01% |
170
+61
| +56% | +$1.35K |
|
3443
CALL
Afya
AFYA
$1.3B
| $345K | ﹤0.01% |
127
-17
| -12% | -$426 |
|
3444
CALL
Cal-Maine
CALM
$4.2B
| $345K | ﹤0.01% |
90
+2
| +2% | +$85 |
|
3445
CALL
Equinox Gold
EQX
$7.51B
| $345K | ﹤0.01% |
295
-307
| -51% | -$3.7K |
|
3446
PUT
Murphy Oil
MUR
$5.38B
| $345K | ﹤0.01% |
387
-439
| -53% | -$5.63K |
|
|
ACIA
3447
DELISTED
Acacia Communications Inc
ACIA
| $345K | ﹤0.01% |
5,119
-358
| -7% | -$24.3K |
|
|
OTRK
3448
DELISTED
Ontrak
OTRK
| $344K | ﹤0.01% |
64
+62
| +3,100% | +$287K |
|
|
ZUO
3449
DELISTED
Zuora, Inc.
ZUO
| $344K | ﹤0.01% |
33,360
-15,546
| -32% | -$180K |
|
3450
ProShares UltraShort Dow 30
DXD
$42.7M
| $343K | ﹤0.01% |
4,385
+1,701
| +63% | +$141K |
|
Similar funds
Simplex Trading's Q3 2020 Portfolio in Review
As of Q3 2020, Simplex Trading held 9,056 positions worth $73.5B, up 17% from $62.7B the previous quarter. Its ten largest holdings account for 43% of the portfolio.
Simplex Trading's Q3 2020 filing shows 1,403 new, 3,135 increased, 3,122 reduced and 1,191 closed positions. Its largest new stake was Goldman Sachs: 60,397 shares worth $12.1M. The largest sale was SPDR Gold Trust, an estimated $95.5M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 0.53% of assets, up from 0.47% a quarter earlier, followed by Technology and Healthcare.
- Simplex Trading's largest Q3 2020 buy was Goldman Sachs: 60,397 shares worth $12.1M.
- Simplex Trading added most to Amazon in Q3 2020, an estimated $102M increase.
- Simplex Trading's biggest Q3 2020 reduction was SPDR Gold Trust, cutting an estimated $95.5M.
- Simplex Trading fully exited iShares MSCI EAFE ETF in Q3 2020, selling an estimated $40.5M.
- Simplex Trading's ten largest holdings make up 43% of its $73.5B portfolio in Q3 2020.
- Simplex Trading opened 1,403 new positions and closed 1,191 in Q3 2020.
- Simplex Trading's portfolio value rose 17% quarter-over-quarter to $73.5B.
Based on Simplex Trading's 13F filing for Q3 2020, filed 14 Oct 2020.