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 | |
|---|---|---|---|---|---|---|
251
CALL
iPath Series B S&P 500 VIX Short-Term Futures ETN
VXX
$156M
| $46.5M | 0.04% |
+98,556
| New | +$58.7M |
|
252
CALL
Gilead Sciences
GILD
$162B
| $46M | 0.04% |
+668,200
| New | +$44.6M |
|
253
PUT
Thermo Fisher Scientific
TMO
$196B
| $46M | 0.04% |
91,200
+90,664
| +16,915% | +$42.8M |
|
254
CALL
Zscaler
ZS
$23B
| $45.3M | 0.04% |
209,600
+207,777
| +11,398% | +$39.5M |
|
255
PUT
Lockheed Martin
LMT
$119B
| $45.2M | 0.04% |
119,500
+118,636
| +13,731% | +$45.6M |
|
256
CALL
Chipotle Mexican Grill
CMG
$41.3B
| $45.1M | 0.04% |
+1,455,000
| New | +$41.5M |
|
257
CALL
PepsiCo
PEP
$185B
| $45M | 0.04% |
303,800
+301,352
| +12,310% | +$43.9M |
|
258
CALL
Coca-Cola
KO
$354B
| $44.9M | 0.04% |
+830,100
| New | +$45.2M |
|
259
CALL
Roblox
RBLX
$35.5B
| $44.8M | 0.04% |
498,100
+495,683
| +20,508% | +$39.8M |
|
260
CALL
Freeport-McMoran
FCX
$93.4B
| $44.6M | 0.04% |
+1,201,500
| New | +$46.8M |
|
261
PUT
Eli Lilly
LLY
$1.04T
| $44.5M | 0.04% |
194,100
+191,354
| +6,968% | +$38.4M |
|
262
PUT
RH
RH
$3.31B
| $44.5M | 0.04% |
65,600
+65,359
| +27,120% | +$42.4M |
|
263
CALL
Vanguard S&P 500 ETF
VOO
$979B
| $44.1M | 0.04% |
176,000
+173,786
| +7,849% | +$66.7M |
|
264
CALL
Delta Air Lines
DAL
$54.9B
| $43.8M | 0.04% |
+1,011,900
| New | +$46.8M |
|
265
CALL
Plug Power
PLUG
$3.11B
| $43.6M | 0.04% |
1,273,800
+1,264,198
| +13,166% | +$36.7M |
|
|
266
CALL
Eli Lilly
LLY
$1.04T
| $43.5M | 0.04% |
189,700
+187,475
| +8,426% | +$37.7M |
|
267
CALL
Las Vegas Sands
LVS
$30B
| $43.3M | 0.04% |
+821,700
| New | +$47.4M |
|
268
CALL
Comcast
CMCSA
$84B
| $43M | 0.04% |
754,300
+746,296
| +9,324% | +$41.7M |
|
269
CALL
Virgin Galactic
SPCE
$343M
| $43M | 0.04% |
46,685
+46,550
| +34,481% | +$26.4M |
|
270
CALL
Enphase Energy
ENPH
$5.22B
| $42.7M | 0.04% |
232,400
+230,174
| +10,340% | +$33.8M |
|
271
PUT
Caesars Entertainment
CZR
$6.1B
| $42.5M | 0.04% |
410,100
+408,566
| +26,634% | +$41.2M |
|
272
CALL
Nucor
NUE
$53.7B
| $42.4M | 0.04% |
441,900
+439,720
| +20,171% | +$41.1M |
|
273
CALL
Unity
U
$12.8B
| $42.3M | 0.04% |
385,300
+383,439
| +20,604% | +$37.7M |
|
|
274
PUT
Coca-Cola
KO
$354B
| $42.2M | 0.04% |
+780,600
| New | +$42.5M |
|
|
275
PUT
Zscaler
ZS
$23B
| $41.6M | 0.04% |
192,400
+190,470
| +9,869% | +$36.2M |
|
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.