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 | |
|---|---|---|---|---|---|---|
726
PUT
Vanguard FTSE Europe ETF
VGK
$29.8B
| $6.25M | 0.01% |
1,364
-1,393
| -51% | -$74.4K |
|
727
PUT
McKesson
MCK
$95.7B
| $6.24M | 0.01% |
419
+109
| +35% | +$16.6K |
|
728
CALL
Corning
GLW
$136B
| $6.22M | 0.01% |
1,921
+486
| +34% | +$15K |
|
729
CALL
Teva Pharmaceuticals
TEVA
$35.7B
| $6.22M | 0.01% |
6,904
-6,338
| -48% | -$67K |
|
730
CALL
General Dynamics
GD
$103B
| $6.21M | 0.01% |
449
-260
| -37% | -$38.4K |
|
|
ABMD
731
CALL
DELISTED
Abiomed Inc
ABMD
| $6.21M | 0.01% |
224
-23
| -9% | -$6.63K |
|
732
CALL
Vanguard High Dividend Yield ETF
VYM
$80.5B
| $6.2M | 0.01% |
766
+179
| +30% | +$14.7K |
|
733
CALL
GSK
GSK
$101B
| $6.2M | 0.01% |
1,317
+321
| +32% | +$16.1K |
|
734
PUT
Chubb
CB
$136B
| $6.19M | 0.01% |
533
-5
| -0.9% | -$628 |
|
735
CALL
Bilibili
BILI
$7.27B
| $6.18M | 0.01% |
1,487
+192
| +15% | +$8.48K |
|
736
PUT
ON Semiconductor
ON
$34.7B
| $6.18M | 0.01% |
2,851
+685
| +32% | +$14.5K |
|
737
PUT
Petrobras
PBR
$124B
| $6.14M | 0.01% |
8,619
-1,871
| -18% | -$15.9K |
|
738
PUT
BioMarin Pharmaceuticals
BMRN
$11.4B
| $6.13M | 0.01% |
806
+75
| +10% | +$7.59K |
|
739
PUT
Vulcan Materials
VMC
$35.8B
| $6.11M | 0.01% |
451
+324
| +255% | +$40.7K |
|
740
PUT
Vale
VALE
$63.6B
| $6.1M | 0.01% |
5,768
-241
| -4% | -$2.71K |
|
|
CTXS
741
CALL
DELISTED
Citrix Systems Inc
CTXS
| $6.1M | 0.01% |
443
-330
| -43% | -$47.1K |
|
742
PUT
XPO
XPO
$25.2B
| $6.09M | 0.01% |
2,082
+818
| +65% | +$23.5K |
|
743
CALL
Tandem Diabetes Care
TNDM
$1.11B
| $6.09M | 0.01% |
537
-89
| -14% | -$9.35K |
|
744
PUT
NetApp
NTAP
$32.6B
| $6.09M | 0.01% |
1,389
+930
| +203% | +$40.6K |
|
745
PUT
Dell
DELL
$287B
| $6.08M | 0.01% |
1,774
-1,061
| -37% | -$33.1K |
|
|
SINA
746
CALL
DELISTED
Sina Corp
SINA
| $6.08M | 0.01% |
1,428
+1,248
| +693% | +$50.1K |
|
747
iShares US Home Construction ETF
ITB
$2.33B
| $6.07M | 0.01% |
+107,145
| New | +$5.6M |
|
|
IRBT
748
CALL
DELISTED
iRobot
IRBT
| $6.06M | 0.01% |
799
+189
| +31% | +$14.6K |
|
|
MRSH
749
CALL
Marsh
MRSH
$83.8B
| $6.06M | 0.01% |
528
+281
| +114% | +$32.2K |
|
750
CALL
Nutrien
NTR
$32.9B
| $6.04M | 0.01% |
1,539
-862
| -36% | -$31.4K |
|
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.