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 | |
|---|---|---|---|---|---|---|
4301
CALL
Koppers
KOP
$946M
| $171K | ﹤0.01% |
82
-9
| -10% | -$205 |
|
4302
CALL
Manulife Financial
MFC
$73B
| $171K | ﹤0.01% |
123
-103
| -46% | -$1.48K |
|
4303
PUT
MidCap Financial Investment
MFIC
$801M
| $171K | ﹤0.01% |
207
-194
| -48% | -$1.79K |
|
|
NOA
4304
CALL
North American Construction
NOA
$357M
| $171K | ﹤0.01% |
264
+254
| +2,540% | +$1.7K |
|
4305
CALL
Impinj
PI
$4.24B
| $171K | ﹤0.01% |
65
+34
| +110% | +$898 |
|
|
TSE
4306
CALL
DELISTED
Trinseo
TSE
| $171K | ﹤0.01% |
67
-100
| -60% | -$2.49K |
|
|
SIOX
4307
PUT
DELISTED
Sio Gene Therapies Inc. Common Stock
SIOX
| $171K | ﹤0.01% |
374
+208
| +125% | +$687 |
|
4308
PUT
AppFolio
APPF
$6.62B
| $170K | ﹤0.01% |
12
-138
| -92% | -$21.3K |
|
4309
BlackLine
BL
$1.9B
| $170K | ﹤0.01% |
+1,905
| New | +$160K |
|
4310
CALL
CACI
CACI
$10.8B
| $170K | ﹤0.01% |
8
+2
| +33% | +$432 |
|
4311
ICU Medical
ICUI
$4.16B
| $170K | ﹤0.01% |
934
-608
| -39% | -$114K |
|
4312
PUT
M/I Homes
MHO
$3.95B
| $170K | ﹤0.01% |
37
+14
| +61% | +$582 |
|
4313
Pacific Biosciences
PACB
$435M
| $170K | ﹤0.01% |
17,319
+13,991
| +420% | +$80.5K |
|
4314
PUT
Skywest
SKYW
$4.35B
| $170K | ﹤0.01% |
57
-62
| -52% | -$1.93K |
|
4315
Knight Transportation
KNX
$11.5B
| $169K | ﹤0.01% |
4,167
+3,886
| +1,383% | +$171K |
|
|
DRE
4316
CALL
DELISTED
Duke Realty Corp.
DRE
| $169K | ﹤0.01% |
46
+44
| +2,200% | +$1.66K |
|
4317
NewMarket
NEU
$7.24B
| $168K | ﹤0.01% |
+493
| New | +$187K |
|
4318
TechTarget
TTGT
$327M
| $168K | ﹤0.01% |
3,843
+2,817
| +275% | +$106K |
|
|
PING
4319
PUT
DELISTED
Ping Identity Holding Corp.
PING
| $168K | ﹤0.01% |
54
-32
| -37% | -$1.05K |
|
|
VER
4320
DELISTED
VEREIT, Inc.
VER
| $168K | ﹤0.01% |
5,180
-1,593
| -24% | -$52.5K |
|
4321
PUT
Avnet
AVT
$6.86B
| $167K | ﹤0.01% |
65
-110
| -63% | -$2.98K |
|
4322
CALL
Bright Horizons
BFAM
$4.35B
| $167K | ﹤0.01% |
11
+4
| +57% | +$503 |
|
4323
CALL
Ingles Markets
IMKTA
$1.72B
| $167K | ﹤0.01% |
44
+25
| +132% | +$1.01K |
|
4324
CALL
Monolithic Power Systems
MPWR
$61.4B
| $167K | ﹤0.01% |
6
-11
| -65% | -$2.86K |
|
4325
QuantumScape Corp
QS
$3.05B
| $167K | ﹤0.01% |
+10,029
| New | +$149K |
|
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.