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 |
Invesco QQQ Trust
QQQ
|
+$77.3M |
| 2 |
SPDR Gold Trust
GLD
|
+$73.2M |
| 3 |
iShares MSCI EAFE ETF
EFA
|
+$38.5M |
| 4 |
Netflix
NFLX
|
+$38.4M |
| 5 |
NVIDIA
NVDA
|
+$36.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$55.9M |
| 2 |
iPath Series B S&P 500 VIX Short-Term Futures ETN
VXX
|
+$28.3M |
| 3 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$23.1M |
| 4 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$23.1M |
| 5 |
Adobe
ADBE
|
+$22M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.49% |
| 2 | Consumer Discretionary | 0.47% |
| 3 | Communication Services | 0.34% |
| 4 | Healthcare | 0.26% |
| 5 | Financials | 0.23% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1551
Sonos
SONO
$1.75B
| $1.9M | ﹤0.01% |
129,557
+128,983
| +22,471% | +$1.37M |
|
1552
CALL
Old Dominion Freight Line
ODFL
$48.5B
| $1.89M | ﹤0.01% |
222
+150
| +208% | +$11.4K |
|
1553
Arrowhead Research
ARWR
$12.1B
| $1.89M | ﹤0.01% |
43,654
-2,330
| -5% | -$82.2K |
|
1554
PUT
HP
HPQ
$23.5B
| $1.89M | ﹤0.01% |
1,082
+963
| +809% | +$15.3K |
|
|
OPTU
1555
Optimum Communications Inc
OPTU
$316M
| $1.88M | ﹤0.01% |
83,577
+26,712
| +47% | +$655K |
|
|
NETI
1556
PUT
DELISTED
Eneti Inc.
NETI
| $1.88M | ﹤0.01% |
1,231
+1,108
| +901% | +$21.7K |
|
|
ATH
1557
PUT
DELISTED
Athene Holding Ltd. Class A Common Shares
ATH
| $1.88M | ﹤0.01% |
604
-517
| -46% | -$14.4K |
|
1558
PUT
Jacobs Solutions
J
$15.9B
| $1.88M | ﹤0.01% |
268
+233
| +666% | +$15.7K |
|
1559
PUT
National Vision
EYE
$1.6B
| $1.88M | ﹤0.01% |
615
+379
| +161% | +$9.94K |
|
|
AMRN
1560
CALL
Amarin Corp
AMRN
$284M
| $1.87M | ﹤0.01% |
135
-68
| -33% | -$9.36K |
|
1561
PUT
Paychex
PAYX
$40.4B
| $1.87M | ﹤0.01% |
247
-83
| -25% | -$5.75K |
|
1562
CALL
BJs Wholesale Club
BJ
$11.9B
| $1.87M | ﹤0.01% |
502
+486
| +3,038% | +$14.9K |
|
|
DVAX
1563
CALL
DELISTED
Dynavax Technologies
DVAX
| $1.87M | ﹤0.01% |
2,109
+1,948
| +1,210% | +$9.85K |
|
|
CODX
1564
CALL
Co-Diagnostics
CODX
$7.74M
| $1.87M | ﹤0.01% |
32
+6
| +23% | +$2.74K |
|
|
MASI
1565
CALL
DELISTED
Masimo
MASI
| $1.87M | ﹤0.01% |
82
+78
| +1,950% | +$17.1K |
|
|
IPHI
1566
CALL
DELISTED
INPHI CORPORATION
IPHI
| $1.87M | ﹤0.01% |
159
+45
| +39% | +$4.74K |
|
1567
CALL
Adaptive Biotechnologies
ADPT
$3.56B
| $1.87M | ﹤0.01% |
386
+282
| +271% | +$10.3K |
|
1568
PUT
Wendy's
WEN
$1.33B
| $1.87M | ﹤0.01% |
857
-335
| -28% | -$6.66K |
|
1569
CALL
BioXcel Therapeutics
BTAI
$26.2M
| $1.86M | ﹤0.01% |
22
+21
| +2,100% | +$13.7K |
|
|
JKS
1570
CALL
JinkoSolar
JKS
$775M
| $1.86M | ﹤0.01% |
1,051
+10
| +1% | +$160 |
|
1571
iShares Russell 2000 Growth ETF
IWO
$14.5B
| $1.86M | ﹤0.01% |
8,978
-14,537
| -62% | -$2.72M |
|
1572
PUT
Healthpeak Properties
DOC
$15.4B
| $1.85M | ﹤0.01% |
673
+663
| +6,630% | +$16.9K |
|
|
SRNE
1573
PUT
DELISTED
Sorrento Therapeutics, Inc.
SRNE
| $1.85M | ﹤0.01% |
2,947
+1,919
| +187% | +$7.35K |
|
1574
Ultragenyx Pharmaceutical
RARE
$2.65B
| $1.84M | ﹤0.01% |
23,579
+8,294
| +54% | +$549K |
|
1575
CALL
Vipshop
VIPS
$6.84B
| $1.84M | ﹤0.01% |
926
+375
| +68% | +$6.44K |
|
Similar funds
Simplex Trading's Q2 2020 Portfolio in Review
As of Q2 2020, Simplex Trading held 8,917 positions worth $62.7B, up 11% from $56.7B the previous quarter. Its ten largest holdings account for 44% of the portfolio.
Simplex Trading's Q2 2020 filing shows 1,290 new, 3,427 increased, 2,723 reduced and 1,278 closed positions. Its largest new stake was iShares MSCI EAFE ETF: 665,841 shares worth $40.5M. The largest sale was Apple, an estimated $55.9M.
By sector, the portfolio is most concentrated in Technology at 0.49% of assets, up from 0.49% a quarter earlier, followed by Consumer Discretionary and Communication Services.
- Simplex Trading's largest Q2 2020 buy was iShares MSCI EAFE ETF: 665,841 shares worth $40.5M.
- Simplex Trading added most to Invesco QQQ Trust in Q2 2020, an estimated $77.3M increase.
- Simplex Trading's biggest Q2 2020 reduction was Apple, cutting an estimated $55.9M.
- Simplex Trading fully exited Adobe in Q2 2020, selling an estimated $22M.
- Simplex Trading's ten largest holdings make up 44% of its $62.7B portfolio in Q2 2020.
- Simplex Trading opened 1,290 new positions and closed 1,278 in Q2 2020.
- Simplex Trading's portfolio value rose 11% quarter-over-quarter to $62.7B.
Based on Simplex Trading's 13F filing for Q2 2020, filed 13 Jul 2020.