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 | |
|---|---|---|---|---|---|---|
551
CALL
XPeng
XPEV
$12.3B
| $18M | 0.02% |
358,400
-340,800
| -49% | -$15.4M |
|
552
CALL
Dow Inc
DOW
$22.5B
| $18M | 0.02% |
317,100
+139,900
| +79% | +$7.98M |
|
553
CALL
Hilton Worldwide
HLT
$73.8B
| $17.9M | 0.02% |
114,600
+16,500
| +17% | +$2.38M |
|
554
PUT
Dollar Tree
DLTR
$23.5B
| $17.8M | 0.02% |
126,700
+27,400
| +28% | +$3.33M |
|
555
CALL
Macy's
M
$6.4B
| $17.8M | 0.02% |
680,000
-71,600
| -10% | -$1.95M |
|
556
Sea Limited
SE
$64.2B
| $17.7M | 0.02% |
79,236
+78,886
| +22,539% | +$23.5M |
|
557
PUT
Stryker
SYK
$119B
| $17.7M | 0.02% |
66,200
+59,300
| +859% | +$15.6M |
|
558
PUT
ProShares Ultra Bloomberg Natural Gas
BOIL
$422M
| $17.7M | 0.02% |
6,276
+69
| +1% | +$721K |
|
559
PUT
Wolfspeed
WOLF
$1.52B
| $17.6M | 0.02% |
157,800
+52,400
| +50% | +$5.84M |
|
|
WBA
560
CALL
DELISTED
Walgreens Boots Alliance
WBA
| $17.6M | 0.02% |
338,000
-126,300
| -27% | -$6.12M |
|
561
PUT
Crown Castle
CCI
$33.8B
| $17.6M | 0.02% |
84,200
+54,100
| +180% | +$9.99M |
|
562
PUT
Altria Group
MO
$121B
| $17.5M | 0.02% |
369,600
-64,300
| -15% | -$2.95M |
|
563
CALL
Tilray
TLRY
$514M
| $17.4M | 0.02% |
247,860
+103,800
| +72% | +$10.4M |
|
564
CALL
CarMax
KMX
$8.15B
| $17.4M | 0.02% |
133,600
+103,600
| +345% | +$14.5M |
|
|
ZEN
565
CALL
DELISTED
ZENDESK INC
ZEN
| $17.4M | 0.02% |
166,600
+112,700
| +209% | +$12.1M |
|
566
PUT
Cummins
CMI
$91.2B
| $17.3M | 0.02% |
79,500
+14,500
| +22% | +$3.3M |
|
|
DENT
567
CALL
DELISTED
AdvisorShares Dent Tactical ETF
DENT
| $17.3M | 0.02% |
679,500
+499,400
| +277% | +$12.7M |
|
568
Novavax
NVAX
$1.3B
| $17.3M | 0.02% |
120,917
+55,977
| +86% | +$9.62M |
|
569
State Street Consumer Discretionary Select Sector SPDR ETF
XLY
$22.3B
| $17.3M | 0.02% |
+168,852
| New | +$16.8M |
|
570
PUT
Intercontinental Exchange
ICE
$80.6B
| $17.2M | 0.02% |
125,600
+81,700
| +186% | +$10.8M |
|
571
CALL
BILL Holdings
BILL
$4.17B
| $17.2M | 0.02% |
68,900
+53,900
| +359% | +$15.2M |
|
572
PUT
SolarEdge
SEDG
$2.91B
| $17.1M | 0.02% |
61,100
+8,800
| +17% | +$2.78M |
|
573
Uber
UBER
$143B
| $17.1M | 0.02% |
408,212
+349,738
| +598% | +$15.1M |
|
574
CALL
Dollar General
DG
$26.5B
| $17.1M | 0.02% |
72,400
+40,400
| +126% | +$8.92M |
|
575
CALL
US Bancorp Series B Preferred Stock
USB.PRH
$747M
| $17M | 0.02% |
302,600
-127,000
| -30% | -$3.1M |
|
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.