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 | |
|---|---|---|---|---|---|---|
2226
PUT
Essex Property Trust
ESS
$18.9B
| $1M | ﹤0.01% |
50
+35
| +233% | +$7.62K |
|
2227
CALL
Repligen
RGEN
$7.44B
| $1M | ﹤0.01% |
68
+49
| +258% | +$7K |
|
2228
CALL
VeriSign
VRSN
$25.3B
| $1M | ﹤0.01% |
49
+20
| +69% | +$4.13K |
|
2229
CALL
BWX Technologies
BWXT
$16B
| $1M | ﹤0.01% |
178
-129
| -42% | -$7.24K |
|
2230
HubSpot
HUBS
$10.5B
| $1M | ﹤0.01% |
3,427
+1,915
| +127% | +$502K |
|
2231
State Street SPDR S&P Metals & Mining ETF
XME
$4.05B
| $1M | ﹤0.01% |
+43,103
| New | +$1.02M |
|
|
XLRN
2232
PUT
DELISTED
Acceleron Pharma
XLRN
| $1M | ﹤0.01% |
89
-343
| -79% | -$34.1K |
|
2233
CALL
Churchill Downs
CHDN
$6.03B
| $999K | ﹤0.01% |
122
+118
| +2,950% | +$9.15K |
|
|
BIG
2234
PUT
DELISTED
Big Lots, Inc.
BIG
| $999K | ﹤0.01% |
224
-119
| -35% | -$5.35K |
|
2235
CALL
Alto Ingredients
ALTO
$360M
| $998K | ﹤0.01% |
1,366
+1,192
| +685% | +$4.13K |
|
2236
PUT
DMC Global
BOOM
$121M
| $998K | ﹤0.01% |
303
+273
| +910% | +$8.62K |
|
2237
Globus Medical
GMED
$10.4B
| $998K | ﹤0.01% |
20,157
+2,005
| +11% | +$103K |
|
|
EB
2238
PUT
DELISTED
Eventbrite
EB
| $993K | ﹤0.01% |
916
+606
| +195% | +$6.02K |
|
2239
CALL
Icon
ICLR
$12.8B
| $993K | ﹤0.01% |
52
+20
| +63% | +$3.68K |
|
2240
CALL
Radware
RDWR
$1.24B
| $993K | ﹤0.01% |
410
+7
| +2% | +$177 |
|
2241
CALL
DigitalBridge
DBRG
$2.94B
| $992K | ﹤0.01% |
909
+569
| +167% | +$5.51K |
|
2242
CALL
Sibanye-Stillwater
SBSW
$5.92B
| $992K | ﹤0.01% |
891
+532
| +148% | +$6.07K |
|
2243
PUT
Shift4
FOUR
$3.84B
| $991K | ﹤0.01% |
+205
| New | +$9.11K |
|
2244
CALL
Allison Transmission
ALSN
$10.1B
| $990K | ﹤0.01% |
282
-128
| -31% | -$4.64K |
|
2245
CALL
Pilgrim's Pride
PPC
$6.82B
| $990K | ﹤0.01% |
662
+553
| +507% | +$8.83K |
|
2246
PUT
Utz Brands
UTZ
$1.25B
| $989K | ﹤0.01% |
+553
| New | +$8.39K |
|
2247
PUT
iShares Gold Trust
IAU
$63B
| $987K | ﹤0.01% |
275
+59
| +27% | +$2.15K |
|
2248
CALL
Tennant Co
TNC
$1.5B
| $983K | ﹤0.01% |
163
+151
| +1,258% | +$9.99K |
|
2249
PUT
Sociedad Química y Minera de Chile
SQM
$19.6B
| $982K | ﹤0.01% |
303
-634
| -68% | -$19.8K |
|
|
RP
2250
CALL
DELISTED
RealPage, Inc.
RP
| $979K | ﹤0.01% |
170
+150
| +750% | +$9.27K |
|
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.