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 | |
|---|---|---|---|---|---|---|
3326
CALL
Barclays
BCS
$96.1B
| $351K | ﹤0.01% |
621
-983
| -61% | -$5.12K |
|
3327
GameStop
GME
$9.62B
| $351K | ﹤0.01% |
323,616
+305,072
| +1,645% | +$352K |
|
3328
El Pollo Loco
LOCO
$492M
| $351K | ﹤0.01% |
23,795
+21,224
| +826% | +$272K |
|
3329
CALL
Polaris
PII
$4.2B
| $351K | ﹤0.01% |
38
-4
| -10% | -$305 |
|
3330
PUT
Pilgrim's Pride
PPC
$6.99B
| $351K | ﹤0.01% |
208
-40
| -16% | -$780 |
|
3331
PUT
Q2 Holdings
QTWO
$3.62B
| $351K | ﹤0.01% |
41
| – | – |
|
3332
Repligen
RGEN
$7.46B
| $351K | ﹤0.01% |
+2,842
| New | +$334K |
|
3333
CALL
Crane NXT
CXT
$3.07B
| $350K | ﹤0.01% |
170
-437
| -72% | -$8.17K |
|
3334
Dropbox
DBX
$7.06B
| $350K | ﹤0.01% |
16,088
-147,254
| -90% | -$3.11M |
|
3335
CALL
Everest Group
EG
$15.3B
| $350K | ﹤0.01% |
17
+14
| +467% | +$2.73K |
|
3336
CALL
Installed Building Products
IBP
$6.21B
| $350K | ﹤0.01% |
51
+47
| +1,175% | +$2.6K |
|
3337
PUT
OGE Energy
OGE
$10.3B
| $349K | ﹤0.01% |
115
-145
| -56% | -$4.48K |
|
3338
O-I Glass
OI
$1.45B
| $349K | ﹤0.01% |
38,895
+26,362
| +210% | +$204K |
|
|
AVYA
3339
CALL
DELISTED
Avaya Holdings Corp. Common Stock
AVYA
| $349K | ﹤0.01% |
283
-1,838
| -87% | -$21.2K |
|
|
AAN.A
3340
CALL
DELISTED
The Aaron's Company Inc Class A
AAN.A
| $349K | ﹤0.01% |
77
+31
| +67% | +$141K |
|
3341
PUT
Huntington Ingalls Industries
HII
$11.3B
| $348K | ﹤0.01% |
20
-31
| -61% | -$5.76K |
|
|
GES
3342
PUT
DELISTED
Guess Inc
GES
| $347K | ﹤0.01% |
359
-1
| -0.3% | -$9 |
|
3343
Green Plains
GPRE
$1.16B
| $347K | ﹤0.01% |
34,016
+9,663
| +40% | +$71.2K |
|
|
LADR
3344
PUT
Ladder Capital
LADR
$1.25B
| $347K | ﹤0.01% |
429
-81
| -16% | -$608 |
|
3345
CALL
Acadia Healthcare
ACHC
$3.06B
| $346K | ﹤0.01% |
138
-37
| -21% | -$924 |
|
3346
CALL
Unum
UNM
$13.7B
| $346K | ﹤0.01% |
209
+109
| +109% | +$1.72K |
|
3347
CALL
Yelp
YELP
$1.45B
| $346K | ﹤0.01% |
150
+17
| +13% | +$371 |
|
|
ISBC
3348
PUT
DELISTED
Investors Bancorp, Inc.
ISBC
| $346K | ﹤0.01% |
408
+398
| +3,980% | +$3.35K |
|
|
ARNA
3349
CALL
DELISTED
Arena Pharmaceuticals Inc
ARNA
| $346K | ﹤0.01% |
55
-20
| -27% | -$1.1K |
|
3350
Jacobs Solutions
J
$16B
| $345K | ﹤0.01% |
+4,927
| New | +$332K |
|
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.