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 | |
|---|---|---|---|---|---|---|
4251
Viper Energy
VNOM
$8.43B
| $369K | ﹤0.01% |
17,329
+14,993
| +642% | +$336K |
|
|
HYFT
4252
CALL
MindWalk Holdings
HYFT
$60.7M
| $368K | ﹤0.01% |
68,800
+20,900
| +44% | +$123K |
|
|
RNLX
4253
PUT
DELISTED
Renalytix plc American Depositary Shares
RNLX
| $368K | ﹤0.01% |
23,200
+23,000
| +11,500% | +$460K |
|
4254
Helen of Troy
HELE
$656M
| $367K | ﹤0.01% |
1,504
+971
| +182% | +$230K |
|
4255
PUT
Primerica
PRI
$10.1B
| $367K | ﹤0.01% |
2,400
+2,200
| +1,100% | +$349K |
|
4256
YPF
YPF
$19.7B
| $367K | ﹤0.01% |
96,296
-65,865
| -41% | -$276K |
|
4257
CALL
Leggett & Platt
LEG
$1.4B
| $366K | ﹤0.01% |
8,900
+2,500
| +39% | +$109K |
|
4258
CALL
Rackspace Technology
RXT
$960M
| $366K | ﹤0.01% |
27,200
-16,100
| -37% | -$230K |
|
|
MKFG
4259
CALL
DELISTED
Markforged Holding Corporation
MKFG
| $366K | ﹤0.01% |
+6,820
| New | +$434K |
|
|
PSTH
4260
PUT
DELISTED
Pershing Square Tontine Holdings, Ltd.
PSTH
| $366K | ﹤0.01% |
18,600
-425,200
| -96% | -$8.43M |
|
4261
Beazer Homes USA
BZH
$888M
| $365K | ﹤0.01% |
15,749
+2,171
| +16% | +$43.6K |
|
4262
CALL
Rimini Street
RMNI
$457M
| $365K | ﹤0.01% |
61,300
+54,300
| +776% | +$426K |
|
4263
CALL
WEX
WEX
$6.42B
| $365K | ﹤0.01% |
2,600
-100
| -4% | -$15.3K |
|
4264
CALL
GATX Corp
GATX
$6.45B
| $364K | ﹤0.01% |
3,500
+3,400
| +3,400% | +$339K |
|
4265
Howard Hughes
HHH
$3.94B
| $364K | ﹤0.01% |
+3,761
| New | +$329K |
|
4266
iShares US Financials ETF
IYF
$4.65B
| $364K | ﹤0.01% |
+4,210
| New | +$367K |
|
4267
PUT
Kodak
KODK
$809M
| $364K | ﹤0.01% |
77,800
-73,200
| -48% | -$460K |
|
4268
PUT
Ranpak Holdings
PACK
$500M
| $364K | ﹤0.01% |
+9,700
| New | +$342K |
|
|
PR
4269
CALL
Permian Resources
PR
$17.4B
| $364K | ﹤0.01% |
61,000
-179,100
| -75% | -$1.22M |
|
4270
PUT
Sweetgreen
SG
$756M
| $364K | ﹤0.01% |
+11,400
| New | +$386K |
|
4271
PUT
Garrett Motion
GTX
$5.39B
| $363K | ﹤0.01% |
45,300
+42,400
| +1,462% | +$313K |
|
4272
Hims & Hers Health
HIMS
$5.79B
| $363K | ﹤0.01% |
+55,473
| New | +$401K |
|
4273
Nice
NICE
$6.15B
| $363K | ﹤0.01% |
+1,198
| New | +$346K |
|
4274
PUT
Perella Weinberg Partners
PWP
$1.08B
| $363K | ﹤0.01% |
28,300
+8,700
| +44% | +$114K |
|
|
PACW
4275
DELISTED
PacWest Bancorp
PACW
| $363K | ﹤0.01% |
+8,045
| New | +$375K |
|
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.