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 |
State Street Financial Select Sector SPDR ETF
XLF
|
+$42.6M |
| 2 |
Shopify
SHOP
|
+$39.6M |
| 3 |
iShares China Large-Cap ETF
FXI
|
+$35.4M |
| 4 |
Verizon
VZ
|
+$34.1M |
| 5 |
KraneShares CSI China Internet ETF
KWEB
|
+$34.1M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
AMC Entertainment Holdings
AMC
|
+$49.5M |
| 2 |
GE Aerospace
GE
|
+$35.2M |
| 3 |
Carnival Corporation Ltd
CCL
|
+$30.5M |
| 4 |
Advanced Micro Devices
AMD
|
+$28.8M |
| 5 |
Micron Technology
MU
|
+$23.7M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.61% |
| 2 | Consumer Discretionary | 0.43% |
| 3 | Healthcare | 0.35% |
| 4 | Communication Services | 0.23% |
| 5 | Financials | 0.21% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
326
PUT
Dollar General
DG
$26.5B
| $39.3M | 0.04% |
166,600
+114,100
| +217% | +$25.2M |
|
327
NIO
NIO
$11.7B
| $39.2M | 0.04% |
1,235,848
+877,917
| +245% | +$32.3M |
|
328
CALL
Trade Desk
TTD
$8.26B
| $39.1M | 0.04% |
426,800
-65,000
| -13% | -$5.69M |
|
329
CALL
Palo Alto Networks
PANW
$273B
| $39M | 0.04% |
420,000
+179,400
| +75% | +$15.5M |
|
330
CALL
PepsiCo
PEP
$185B
| $38.7M | 0.04% |
222,800
-81,000
| -27% | -$13.2M |
|
331
PUT
BioNTech
BNTX
$23.2B
| $38.5M | 0.04% |
149,400
+78,300
| +110% | +$21.4M |
|
332
CALL
Cleveland-Cliffs
CLF
$5.39B
| $38.4M | 0.04% |
1,767,200
+452,100
| +34% | +$9.74M |
|
333
PUT
Honeywell
HON
$73.8B
| $38.4M | 0.04% |
195,330
+87,214
| +81% | +$17.6M |
|
334
PUT
Spotify
SPOT
$97.5B
| $37.8M | 0.04% |
161,700
+47,400
| +41% | +$11.9M |
|
335
PUT
iPath Series B S&P 500 VIX Short-Term Futures ETN
VXX
$156M
| $37.2M | 0.04% |
125,463
+1,907
| +2% | +$677K |
|
336
PUT
Match Group
MTCH
$8.87B
| $36.5M | 0.04% |
280,500
+232,000
| +478% | +$33.6M |
|
337
CALL
Robinhood
HOOD
$93.8B
| $36.4M | 0.04% |
+2,047,200
| New | +$63M |
|
338
CALL
Datadog
DDOG
$87.5B
| $36.3M | 0.04% |
203,700
+2,900
| +1% | +$492K |
|
339
CALL
Wynn Resorts
WYNN
$9.79B
| $36.2M | 0.04% |
426,200
+163,400
| +62% | +$14.5M |
|
340
CALL
ProShares UltraShort Health Care
RXD
$3.38M
| $36.2M | 0.04% |
1,167,800
+257,850
| +28% | +$6.84M |
|
341
CALL
The Mosaic Company
MOS
$7.24B
| $36M | 0.04% |
915,000
+630,000
| +221% | +$24.1M |
|
342
PUT
Medtronic
MDT
$105B
| $35.9M | 0.04% |
346,800
+209,600
| +153% | +$24.3M |
|
343
CALL
American Express
AXP
$238B
| $35.7M | 0.04% |
218,500
+23,500
| +12% | +$4.01M |
|
344
PUT
Marvell Technology
MRVL
$189B
| $35.5M | 0.04% |
405,400
-56,900
| -12% | -$4.25M |
|
345
CALL
Union Pacific
UNP
$174B
| $35.4M | 0.04% |
140,600
-22,700
| -14% | -$5.38M |
|
|
346
CALL
BioNTech
BNTX
$23.2B
| $35.3M | 0.04% |
136,800
+95,300
| +230% | +$26.1M |
|
347
CALL
Texas Instruments
TXN
$268B
| $35.1M | 0.04% |
186,000
-129,800
| -41% | -$24.9M |
|
348
PUT
Unity
U
$12.8B
| $35M | 0.04% |
245,100
+58,000
| +31% | +$8.86M |
|
349
PUT
Caesars Entertainment
CZR
$6.1B
| $34.7M | 0.04% |
370,500
-38,300
| -9% | -$3.88M |
|
|
350
CALL
Unity
U
$12.8B
| $34.6M | 0.03% |
241,700
-126,200
| -34% | -$19.3M |
|
Similar funds
Simplex Trading's Q4 2021 Portfolio in Review
As of Q4 2021, Simplex Trading held 12,077 positions worth $99B, down 7.5% from $107B the previous quarter. Its ten largest holdings account for 33% of the portfolio.
Simplex Trading withdrew a net $10.8B in Q4 2021, closing 1,645 positions and reducing 4,258 holdings. Its most notable exit was Carnival Corporation Ltd, an estimated $30.5M position sold in full.
By sector, the portfolio is most concentrated in Technology at 0.61% of assets, up from 0.49% a quarter earlier, followed by Consumer Discretionary and Healthcare.
Against the trend, Simplex Trading opened a new position in iShares China Large-Cap ETF worth $33M.
- Simplex Trading's largest Q4 2021 buy was iShares China Large-Cap ETF: 902,666 shares worth $33M.
- Simplex Trading added most to State Street Financial Select Sector SPDR ETF in Q4 2021, an estimated $42.6M increase.
- Simplex Trading's biggest Q4 2021 reduction was AMC Entertainment Holdings, cutting an estimated $49.5M.
- Simplex Trading fully exited Carnival Corporation Ltd in Q4 2021, selling an estimated $30.5M.
- Simplex Trading's ten largest holdings make up 33% of its $99B portfolio in Q4 2021.
- Simplex Trading opened 2,269 new positions and closed 1,645 in Q4 2021.
- Simplex Trading's portfolio value fell 7.5% quarter-over-quarter to $99B.
Based on Simplex Trading's 13F filing for Q4 2021, filed 4 Feb 2022.