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 | |
|---|---|---|---|---|---|---|
1626
Axalta
AXTA
$7.01B
| $1.72M | ﹤0.01% |
76,459
+38,661
| +102% | +$791K |
|
|
PTR
1627
PUT
DELISTED
PETROCHINA COMPANY LIMITED ADS (REP 100 H SHARES)
PTR
| $1.72M | ﹤0.01% |
521
+333
| +177% | +$11.8K |
|
1628
PUT
MarineMax
HZO
$800M
| $1.72M | ﹤0.01% |
769
+758
| +6,891% | +$12.5K |
|
1629
CALL
Qiagen
QGEN
$8.53B
| $1.72M | ﹤0.01% |
379
-182
| -32% | -$8.14K |
|
1630
Universal Health Services
UHS
$9.43B
| $1.72M | ﹤0.01% |
18,526
+2,357
| +15% | +$236K |
|
1631
ProShares UltraPro Short Dow 30
SDOW
$171M
| $1.72M | ﹤0.01% |
4,470
+221
| +5% | +$110K |
|
|
ABMD
1632
DELISTED
Abiomed Inc
ABMD
| $1.72M | ﹤0.01% |
7,112
+2,292
| +48% | +$460K |
|
1633
CALL
Idexx Laboratories
IDXX
$42.9B
| $1.72M | ﹤0.01% |
52
+11
| +27% | +$3.19K |
|
1634
CALL
Rambus
RMBS
$10.4B
| $1.71M | ﹤0.01% |
1,125
+650
| +137% | +$9.15K |
|
1635
Cintas
CTAS
$82.4B
| $1.7M | ﹤0.01% |
25,604
-37,904
| -60% | -$2.19M |
|
1636
PUT
FTAI Aviation
FTAI
$22.2B
| $1.7M | ﹤0.01% |
1,536
+1,428
| +1,322% | +$13.1K |
|
1637
CALL
Moody's
MCO
$81.7B
| $1.7M | ﹤0.01% |
62
-11
| -15% | -$2.79K |
|
1638
PUT
Akamai
AKAM
$16.8B
| $1.7M | ﹤0.01% |
159
+14
| +10% | +$1.41K |
|
1639
PUT
NOV
NOV
$7.45B
| $1.7M | ﹤0.01% |
1,388
+933
| +205% | +$11.5K |
|
|
ICPT
1640
CALL
DELISTED
Intercept Pharmaceuticals, Inc.
ICPT
| $1.7M | ﹤0.01% |
354
+133
| +60% | +$10.3K |
|
1641
PUT
Intercontinental Exchange
ICE
$82.4B
| $1.69M | ﹤0.01% |
185
-777
| -81% | -$71.1K |
|
1642
PUT
Eldorado Gold
EGO
$8.31B
| $1.69M | ﹤0.01% |
1,745
+702
| +67% | +$6.1K |
|
1643
CALL
Viking Therapeutics
VKTX
$4.04B
| $1.69M | ﹤0.01% |
2,348
+128
| +6% | +$850 |
|
|
PE
1644
PUT
DELISTED
PARSLEY ENERGY INC
PE
| $1.69M | ﹤0.01% |
1,584
+512
| +48% | +$4.74K |
|
1645
CALL
Hewlett Packard
HPE
$63.2B
| $1.69M | ﹤0.01% |
1,735
+1,522
| +715% | +$14.9K |
|
1646
CALL
Equinix
EQIX
$107B
| $1.69M | ﹤0.01% |
24
-55
| -70% | -$37.2K |
|
1647
PUT
Host Hotels & Resorts
HST
$16.8B
| $1.68M | ﹤0.01% |
1,557
-222
| -12% | -$2.55K |
|
|
MNDT
1648
DELISTED
Mandiant, Inc. Common Stock
MNDT
| $1.68M | ﹤0.01% |
137,890
+58,925
| +75% | +$683K |
|
|
PPL
1649
PUT
PPL Corp
PPL
$27.3B
| $1.68M | ﹤0.01% |
649
+330
| +103% | +$8.59K |
|
|
SGI
1650
Somnigroup International
SGI
$15.1B
| $1.68M | ﹤0.01% |
+93,280
| New | +$1.34M |
|
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.