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 | |
|---|---|---|---|---|---|---|
4676
Black Stone Minerals
BSM
$3.15B
| $121K | ﹤0.01% |
19,727
-7,183
| -27% | -$47.9K |
|
4677
Century Aluminum
CENX
$4.37B
| $121K | ﹤0.01% |
17,063
-3,187
| -16% | -$27.7K |
|
4678
Caesarstone
CSTE
$70.5M
| $121K | ﹤0.01% |
12,404
-45,332
| -79% | -$489K |
|
4679
iShares US Basic Materials ETF
IYM
$1.12B
| $121K | ﹤0.01% |
+1,234
| New | +$121K |
|
4680
Kontoor Brands
KTB
$4.58B
| $121K | ﹤0.01% |
+5,025
| New | +$105K |
|
4681
PUT
News Corp Class B
NWS
$16.9B
| $121K | ﹤0.01% |
87
-80
| -48% | -$1.12K |
|
4682
PUT
Rambus
RMBS
$9.99B
| $121K | ﹤0.01% |
89
+60
| +207% | +$852 |
|
4683
PUT
Simply Good Foods
SMPL
$903M
| $121K | ﹤0.01% |
55
+21
| +62% | +$488 |
|
4684
Teradata
TDC
$2.92B
| $121K | ﹤0.01% |
5,367
-14,493
| -73% | -$322K |
|
|
TGI
4685
PUT
DELISTED
Triumph Group
TGI
| $121K | ﹤0.01% |
187
-72
| -28% | -$535 |
|
4686
Q32 Bio
QTTB
$455M
| $121K | ﹤0.01% |
628
+451
| +255% | +$101K |
|
|
TCS
4687
CALL
DELISTED
THE CONTAINER STORE GROUP, INC.
TCS
| $121K | ﹤0.01% |
13
+11
| +550% | +$707 |
|
|
SPPI
4688
PUT
DELISTED
Spectrum Pharmaceuticals Inc
SPPI
| $121K | ﹤0.01% |
297
+68
| +30% | +$259 |
|
|
DISCK
4689
DELISTED
Discovery, Inc. Series C Common Stock
DISCK
| $121K | ﹤0.01% |
6,215
+4,702
| +311% | +$92.9K |
|
|
CLGX
4690
CALL
DELISTED
Corelogic, Inc.
CLGX
| $121K | ﹤0.01% |
18
-340
| -95% | -$22.9K |
|
4691
Allot
ALLT
$371M
| $120K | ﹤0.01% |
13,291
+3,866
| +41% | +$40.9K |
|
4692
Pathward Financial
CASH
$1.85B
| $120K | ﹤0.01% |
+6,257
| New | +$118K |
|
4693
Coherent
COHR
$52.5B
| $120K | ﹤0.01% |
2,967
-22,634
| -88% | -$997K |
|
4694
Invesco DB Oil Fund
DBO
$404M
| $120K | ﹤0.01% |
16,753
-23,953
| -59% | -$177K |
|
4695
CALL
Digi International
DGII
$2.61B
| $120K | ﹤0.01% |
77
+23
| +43% | +$302 |
|
4696
Fox Factory Holding Corp
FOXF
$744M
| $120K | ﹤0.01% |
1,616
-338
| -17% | -$30.4K |
|
4697
CALL
iBio
IBIO
$68.1M
| $120K | ﹤0.01% |
+1
| New | +$1.45K |
|
4698
CALL
The RealReal
REAL
$1.46B
| $120K | ﹤0.01% |
83
-264
| -76% | -$4.04K |
|
4699
PUT
Ternium
TX
$9.57B
| $120K | ﹤0.01% |
64
-49
| -43% | -$822 |
|
4700
CALL
Xeris Biopharma Holdings
XERS
$1.4B
| $120K | ﹤0.01% |
+204
| New | +$816 |
|
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.