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 | |
|---|---|---|---|---|---|---|
626
PUT
ArcelorMittal
MT
$50B
| $14.4M | 0.01% |
451,600
+152,400
| +51% | +$4.72M |
|
627
CALL
Bilibili
BILI
$7.28B
| $14.4M | 0.01% |
309,400
-166,700
| -35% | -$11.1M |
|
628
Direxion Daily Semiconductor Bull 3X ETF
SOXL
$21.4B
| $14.4M | 0.01% |
211,093
+153,927
| +269% | +$8.73M |
|
629
Intel
INTC
$512B
| $14.3M | 0.01% |
278,650
-141,112
| -34% | -$7.21M |
|
630
PUT
Prudential Financial
PRU
$40.7B
| $14.3M | 0.01% |
132,400
-89,100
| -40% | -$9.68M |
|
631
CALL
Northrop Grumman
NOC
$77B
| $14.3M | 0.01% |
37,000
+4,000
| +12% | +$1.49M |
|
632
CALL
CF Industries
CF
$19.8B
| $14.3M | 0.01% |
202,300
+101,600
| +101% | +$6.36M |
|
633
CALL
Cintas
CTAS
$81.5B
| $14.3M | 0.01% |
128,800
+126,400
| +5,267% | +$13.6M |
|
634
AT&T
T
$158B
| $14.2M | 0.01% |
766,912
-523,747
| -41% | -$9.79M |
|
635
CALL
GSK
GSK
$101B
| $14.2M | 0.01% |
257,920
+114,720
| +80% | +$5.97M |
|
636
PUT
Duke Energy
DUK
$101B
| $14.2M | 0.01% |
135,300
+54,700
| +68% | +$5.55M |
|
637
CALL
ProShares Ultra Bloomberg Natural Gas
BOIL
$426M
| $14.1M | 0.01% |
4,527
+514
| +13% | +$5.37M |
|
638
CALL
RH
RH
$3.14B
| $14.1M | 0.01% |
26,300
+400
| +2% | +$246K |
|
|
UCD
639
CALL
DELISTED
PROSHARES ULTRA BLOOMBERG COMMODITY
UCD
| $14.1M | 0.01% |
369,800
+227,900
| +161% | +$8.68M |
|
|
640
CALL
Prudential Financial
PRU
$40.7B
| $14M | 0.01% |
129,500
-21,700
| -14% | -$2.36M |
|
641
Las Vegas Sands
LVS
$30.3B
| $14M | 0.01% |
372,038
+245,891
| +195% | +$9.45M |
|
642
Royal Caribbean
RCL
$76.4B
| $14M | 0.01% |
181,668
+123,709
| +213% | +$10M |
|
|
DISCK
643
PUT
DELISTED
Discovery, Inc. Series C Common Stock
DISCK
| $14M | 0.01% |
594,200
+152,500
| +35% | +$3.67M |
|
644
CALL
Marriott International
MAR
$96.1B
| $14M | 0.01% |
84,500
+8,100
| +11% | +$1.27M |
|
|
IPFF
645
CALL
DELISTED
iShares International Preferred Stock ETF
IPFF
| $14M | 0.01% |
285,400
+156,700
| +122% | +$7.66M |
|
646
PUT
The Mosaic Company
MOS
$7.15B
| $13.9M | 0.01% |
353,500
-120,700
| -25% | -$4.62M |
|
647
PUT
Prologis
PLD
$133B
| $13.9M | 0.01% |
82,300
+19,400
| +31% | +$2.9M |
|
648
Starbucks
SBUX
$117B
| $13.7M | 0.01% |
117,538
+91,670
| +354% | +$10.3M |
|
649
CALL
TripAdvisor
TRIP
$1.56B
| $13.7M | 0.01% |
504,300
+126,900
| +34% | +$3.89M |
|
650
CALL
Emerson Electric
EMR
$80.5B
| $13.7M | 0.01% |
147,800
+110,200
| +293% | +$10.4M |
|
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.