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 |
AMC Entertainment Holdings
AMC
|
+$39.3M |
| 2 |
AT&T
T
|
+$29.8M |
| 3 |
NVIDIA
NVDA
|
+$28.3M |
| 4 |
Micron Technology
MU
|
+$22.9M |
| 5 |
Baidu
BIDU
|
+$22.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Invesco QQQ Trust
QQQ
|
+$36.1M |
| 2 |
Tesla
TSLA
|
+$35.2M |
| 3 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$25.9M |
| 4 |
Palantir
PLTR
|
+$25.7M |
| 5 |
Wells Fargo
WFC
|
+$20.4M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.47% |
| 2 | Consumer Discretionary | 0.39% |
| 3 | Communication Services | 0.27% |
| 4 | Healthcare | 0.26% |
| 5 | Financials | 0.25% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
2251
Johnson & Johnson
JNJ
$635B
| $1.88M | ﹤0.01% |
11,411
-15,259
| -57% | -$2.53M |
|
2252
PUT
SkinHealth Systems
SKIN
$94.9M
| $1.88M | ﹤0.01% |
111,700
+111,534
| +67,189% | +$1.53M |
|
2253
CALL
Exelixis
EXEL
$13.9B
| $1.87M | ﹤0.01% |
+102,700
| New | +$2.4M |
|
|
NUVA
2254
PUT
DELISTED
NuVasive, Inc.
NUVA
| $1.87M | ﹤0.01% |
27,600
+27,562
| +72,532% | +$1.88M |
|
|
DVAX
2255
CALL
DELISTED
Dynavax Technologies
DVAX
| $1.87M | ﹤0.01% |
+189,800
| New | +$1.73M |
|
2256
CALL
PagerDuty
PD
$700M
| $1.87M | ﹤0.01% |
43,900
+43,818
| +53,437% | +$1.77M |
|
2257
Wheaton Precious Metals
WPM
$50.6B
| $1.87M | ﹤0.01% |
42,413
-20,354
| -32% | -$906K |
|
2258
CALL
KB Financial Group
KB
$41.2B
| $1.87M | ﹤0.01% |
37,900
+37,677
| +16,896% | +$1.88M |
|
|
ETWO
2259
CALL
DELISTED
E2open Parent Holdings
ETWO
| $1.87M | ﹤0.01% |
163,400
+161,549
| +8,728% | +$1.86M |
|
2260
CALL
H&R Block
HRB
$5.18B
| $1.87M | ﹤0.01% |
79,500
+77,868
| +4,771% | +$1.84M |
|
2261
CALL
LCI Industries
LCII
$2.51B
| $1.87M | ﹤0.01% |
14,200
+14,137
| +22,440% | +$1.98M |
|
|
NEWR
2262
DELISTED
New Relic, Inc.
NEWR
| $1.86M | ﹤0.01% |
27,843
+4,050
| +17% | +$261K |
|
2263
CALL
Camping World
CWH
$363M
| $1.86M | ﹤0.01% |
45,400
+44,706
| +6,442% | +$1.85M |
|
2264
CALL
indie Semiconductor
INDI
$733M
| $1.86M | ﹤0.01% |
+187,900
| New | +$1.79M |
|
2265
CALL
LKQ Corp
LKQ
$6.58B
| $1.85M | ﹤0.01% |
37,700
+36,689
| +3,629% | +$1.75M |
|
|
NOAH
2266
Noah Holdings
NOAH
$588M
| $1.85M | ﹤0.01% |
39,253
+12,011
| +44% | +$531K |
|
2267
CALL
Pembina Pipeline
PBA
$29.9B
| $1.85M | ﹤0.01% |
58,300
+57,854
| +12,972% | +$1.81M |
|
|
TGI
2268
CALL
DELISTED
Triumph Group
TGI
| $1.85M | ﹤0.01% |
89,300
+88,615
| +12,936% | +$1.63M |
|
2269
CALL
TG Therapeutics
TGTX
$8.58B
| $1.85M | ﹤0.01% |
+47,700
| New | +$1.87M |
|
2270
CALL
Cheniere Energy
LNG
$56.5B
| $1.85M | ﹤0.01% |
21,300
+21,098
| +10,445% | +$1.72M |
|
2271
CALL
Southern Copper
SCCO
$141B
| $1.84M | ﹤0.01% |
30,959
+30,586
| +8,200% | +$1.99M |
|
2272
PUT
Canadian Imperial Bank of Commerce
CM
$107B
| $1.84M | ﹤0.01% |
32,400
+32,070
| +9,718% | +$1.76M |
|
|
HZNP
2273
DELISTED
Horizon Therapeutics Public Limited Company Ordinary Shares
HZNP
| $1.84M | ﹤0.01% |
19,699
-28,983
| -60% | -$2.67M |
|
2274
PUT
Helmerich & Payne
HP
$3.53B
| $1.84M | ﹤0.01% |
56,500
+55,742
| +7,354% | +$1.64M |
|
2275
PUT
Atossa Therapeutics
ATOS
$22.8M
| $1.84M | ﹤0.01% |
19,380
+19,325
| +35,136% | +$1.02M |
|
Similar funds
Simplex Trading's Q2 2021 Portfolio in Review
As of Q2 2021, Simplex Trading held 11,184 positions worth $104B, up 86% from $55.7B the previous quarter. Its ten largest holdings account for 40% of the portfolio.
Simplex Trading deployed $97.5B of net new capital in Q2 2021, opening 2,250 new positions and adding to 6,673 existing holdings. Its largest new stake was AT&T: 1,311,180 shares worth $28.5M.
By sector, the portfolio is most concentrated in Technology at 0.47% of assets, down from 0.65% a quarter earlier, followed by Consumer Discretionary and Communication Services.
On the sell side, the largest reduction was State Street SPDR Dow Jones Industrial Average ETF Trust, an estimated $25.9M trimmed.
- Simplex Trading's largest Q2 2021 buy was AT&T: 1,311,180 shares worth $28.5M.
- Simplex Trading added most to AMC Entertainment Holdings in Q2 2021, an estimated $39.3M increase.
- Simplex Trading's biggest Q2 2021 reduction was State Street SPDR Dow Jones Industrial Average ETF Trust, cutting an estimated $25.9M.
- Simplex Trading fully exited Invesco QQQ Trust in Q2 2021, selling an estimated $36.1M.
- Simplex Trading's ten largest holdings make up 40% of its $104B portfolio in Q2 2021.
- Simplex Trading opened 2,250 new positions and closed 1,197 in Q2 2021.
- Simplex Trading's portfolio value rose 86% quarter-over-quarter to $104B.
Based on Simplex Trading's 13F filing for Q2 2021, filed 12 Aug 2021.