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 | |
|---|---|---|---|---|---|---|
|
AXON
2451
Axon Enterprise
AXON
$40.5B
| $1.38M | ﹤0.01% |
8,809
+5,032
| +133% | +$845K |
|
|
SWN
2452
CALL
DELISTED
Southwestern Energy Company
SWN
| $1.38M | ﹤0.01% |
296,100
+165,000
| +126% | +$822K |
|
2453
PUT
AngloGold Ashanti
AU
$40.3B
| $1.38M | ﹤0.01% |
65,700
-115,600
| -64% | -$2.25M |
|
2454
Global Payments
GPN
$22.1B
| $1.38M | ﹤0.01% |
+10,198
| New | +$1.41M |
|
2455
Masco
MAS
$16B
| $1.38M | ﹤0.01% |
19,628
+3,348
| +21% | +$217K |
|
2456
State Street SPDR S&P Regional Banking ETF
KRE
$4.86B
| $1.38M | ﹤0.01% |
19,433
-47,691
| -71% | -$3.41M |
|
2457
Chegg
CHGG
$108M
| $1.37M | ﹤0.01% |
44,691
+32,577
| +269% | +$1.32M |
|
2458
PUT
Fluor
FLR
$7.29B
| $1.37M | ﹤0.01% |
55,300
-59,000
| -52% | -$1.26M |
|
2459
PUT
Starwood Property Trust
STWD
$6.12B
| $1.37M | ﹤0.01% |
56,300
+16,400
| +41% | +$414K |
|
|
LAC
2460
DELISTED
Lithium Americas Corp. Common Shares
LAC
| $1.37M | ﹤0.01% |
46,980
-32,195
| -41% | -$963K |
|
2461
PUT
Molina Healthcare
MOH
$10.3B
| $1.37M | ﹤0.01% |
4,300
-2,100
| -33% | -$625K |
|
2462
Nerdy
NRDY
$107M
| $1.37M | ﹤0.01% |
+303,596
| New | +$2.17M |
|
2463
Hasbro
HAS
$12.6B
| $1.36M | ﹤0.01% |
+13,419
| New | +$1.29M |
|
|
CNR
2464
DELISTED
Cornerstone Building Brands, Inc.
CNR
| $1.36M | ﹤0.01% |
78,082
+23,317
| +43% | +$362K |
|
2465
CALL
Bio-Rad Laboratories Class A
BIO
$8.42B
| $1.36M | ﹤0.01% |
1,800
+1,500
| +500% | +$1.12M |
|
2466
CALL
Arcturus Therapeutics
ARCT
$157M
| $1.36M | ﹤0.01% |
36,700
+26,800
| +271% | +$1.09M |
|
|
SPWR
2467
DELISTED
SunPower Corporation Common Stock
SPWR
| $1.36M | ﹤0.01% |
+65,113
| New | +$1.76M |
|
2468
Banco Santander
SAN
$194B
| $1.36M | ﹤0.01% |
412,527
+159,397
| +63% | +$560K |
|
2469
PUT
Star Bulk Carriers
SBLK
$3.14B
| $1.36M | ﹤0.01% |
59,900
-29,600
| -33% | -$623K |
|
2470
PUT
Pinnacle West Capital
PNW
$12.9B
| $1.35M | ﹤0.01% |
19,200
+6,000
| +45% | +$403K |
|
2471
PUT
Magnolia Oil & Gas
MGY
$5.83B
| $1.35M | ﹤0.01% |
71,700
+14,000
| +24% | +$278K |
|
2472
CALL
Uranium Energy
UEC
$4.71B
| $1.35M | ﹤0.01% |
403,100
+101,600
| +34% | +$391K |
|
2473
CALL
Solid Power
SLDP
$468M
| $1.35M | ﹤0.01% |
+154,400
| New | +$1.52M |
|
|
PSXP
2474
CALL
DELISTED
PHILLIPS 66 PARTNERS LP
PSXP
| $1.35M | ﹤0.01% |
37,400
-1,300
| -3% | -$48.4K |
|
|
CNH
2475
CALL
CNH Industrial
CNH
$13.8B
| $1.35M | ﹤0.01% |
79,741
+67,562
| +555% | +$1.04M |
|
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.