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 | |
|---|---|---|---|---|---|---|
4026
PUT
ICL Group
ICL
$6.57B
| $429K | ﹤0.01% |
+44,400
| New | +$395K |
|
4027
CALL
Natera
NTRA
$36.1B
| $429K | ﹤0.01% |
4,600
+2,800
| +156% | +$291K |
|
4028
Ameren
AEE
$30.9B
| $428K | ﹤0.01% |
+4,819
| New | +$409K |
|
|
BLUE
4029
DELISTED
bluebird bio
BLUE
| $428K | ﹤0.01% |
2,145
-836
| -28% | -$197K |
|
4030
CALL
TechnipFMC
FTI
$28.8B
| $428K | ﹤0.01% |
72,400
-6,900
| -9% | -$47.4K |
|
|
SRC
4031
PUT
DELISTED
SPIRIT REALTY CAPITAL, INC.
SRC
| $428K | ﹤0.01% |
8,900
-100
| -1% | -$4.76K |
|
|
ARI
4032
PUT
Apollo Commercial Real Estate
ARI
$867M
| $427K | ﹤0.01% |
32,500
+14,900
| +85% | +$215K |
|
4033
CALL
Kyndryl
KD
$3.05B
| $427K | ﹤0.01% |
+23,600
| New | +$509K |
|
4034
CALL
Kodak
KODK
$805M
| $427K | ﹤0.01% |
91,400
-149,800
| -62% | -$941K |
|
4035
CALL
New Mountain Finance
NMFC
$663M
| $427K | ﹤0.01% |
31,200
+30,700
| +6,140% | +$420K |
|
4036
CALL
Atea Pharmaceuticals
AVIR
$358M
| $426K | ﹤0.01% |
47,700
+42,200
| +767% | +$658K |
|
4037
DigitalBridge
DBRG
$2.93B
| $426K | ﹤0.01% |
+12,800
| New | +$381K |
|
4038
PUT
Signet Jewelers
SIG
$3.78B
| $426K | ﹤0.01% |
4,900
-2,000
| -29% | -$184K |
|
4039
CALL
Marcus Corp
MCS
$761M
| $425K | ﹤0.01% |
23,800
-3,200
| -12% | -$59.9K |
|
|
NGM
4040
CALL
DELISTED
NGM Biopharmaceuticals, Inc. Common Stock
NGM
| $425K | ﹤0.01% |
24,000
+22,100
| +1,163% | +$424K |
|
4041
Credicorp
BAP
$30.4B
| $424K | ﹤0.01% |
3,474
-3,095
| -47% | -$379K |
|
4042
CALL
Tiptree Inc
TIPT
$692M
| $424K | ﹤0.01% |
30,700
-71,700
| -70% | -$1M |
|
4043
PUT
Vanguard Short-Term Treasury ETF
VGSH
$29.3B
| $424K | ﹤0.01% |
5,200
-4,300
| -45% | -$263K |
|
4044
CALL
Amkor Technology
AMKR
$11.2B
| $423K | ﹤0.01% |
17,100
+1,200
| +8% | +$27.9K |
|
4045
CALL
Alliance Resource Partners
ARLP
$3.36B
| $423K | ﹤0.01% |
33,500
-13,600
| -29% | -$153K |
|
4046
PUT
Smartbird Inc
BIRD
$19.5M
| $423K | ﹤0.01% |
+1,405
| New | +$526K |
|
4047
CALL
Host Hotels & Resorts
HST
$17.4B
| $422K | ﹤0.01% |
24,300
-188,400
| -89% | -$3.18M |
|
4048
PUT
Vanguard S&P 500 Value ETF
VOOV
$6.65B
| $422K | ﹤0.01% |
1,400
+1,300
| +1,300% | +$191K |
|
4049
CALL
Grocery Outlet
GO
$908M
| $421K | ﹤0.01% |
14,900
-16,000
| -52% | -$411K |
|
4050
HCA Healthcare
HCA
$91.5B
| $421K | ﹤0.01% |
+1,642
| New | +$402K |
|
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.