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 | |
|---|---|---|---|---|---|---|
|
POSH
2976
PUT
DELISTED
Poshmark, Inc. Class A Common Stock
POSH
| $924K | ﹤0.01% |
54,300
+49,600
| +1,055% | +$1.05M |
|
|
PENG
2977
CALL
Penguin Solutions Inc
PENG
$2.69B
| $922K | ﹤0.01% |
26,000
+25,800
| +12,900% | +$732K |
|
2978
PUT
Aehr Test Systems
AEHR
$2.52B
| $921K | ﹤0.01% |
+38,100
| New | +$744K |
|
|
RAD
2979
PUT
DELISTED
Rite Aid Corporation
RAD
| $919K | ﹤0.01% |
62,600
-27,100
| -30% | -$366K |
|
|
TACO
2980
CALL
DELISTED
Del Taco Restaurants, Inc. Common Stock
TACO
| $917K | ﹤0.01% |
73,700
+69,900
| +1,839% | +$675K |
|
|
LONA
2981
CALL
LeonaBio Inc
LONA
$69.1M
| $916K | ﹤0.01% |
7,030
+6,480
| +1,178% | +$819K |
|
|
NTR
2982
CALL
DELISTED
NEW YORK MORTGAGE TRUST INC
NTR
| $916K | ﹤0.01% |
246,400
-51,700
| -17% | -$192K |
|
|
NOVA
2983
CALL
DELISTED
Sunnova Energy
NOVA
| $915K | ﹤0.01% |
32,800
+17,800
| +119% | +$641K |
|
2984
CALL
ZipRecruiter
ZIP
$346M
| $915K | ﹤0.01% |
36,700
+35,000
| +2,059% | +$960K |
|
|
OSH
2985
DELISTED
Oak Street Health, Inc.
OSH
| $915K | ﹤0.01% |
+27,612
| New | +$1.04M |
|
2986
CALL
Revolution Medicines
RVMD
$40B
| $913K | ﹤0.01% |
36,300
+35,700
| +5,950% | +$1.01M |
|
2987
PUT
OraSure Technologies
OSUR
$273M
| $912K | ﹤0.01% |
105,000
-54,100
| -34% | -$535K |
|
|
CHNG
2988
PUT
DELISTED
Change Healthcare Inc. Common Stock
CHNG
| $912K | ﹤0.01% |
42,700
-900
| -2% | -$18.9K |
|
2989
Direxion Daily MSCI Emerging Markets Bull 3X ETF
EDC
$148M
| $911K | ﹤0.01% |
12,324
-13,382
| -52% | -$1.06M |
|
|
KL
2990
DELISTED
Kirkland Lake Gold Ltd Ordinary
KL
| $911K | ﹤0.01% |
21,723
-6,573
| -23% | -$277K |
|
2991
CALL
Vuzix
VUZI
$193M
| $910K | ﹤0.01% |
105,000
-27,100
| -21% | -$293K |
|
|
ESMT
2992
DELISTED
EngageSmart, Inc.
ESMT
| $910K | ﹤0.01% |
+37,755
| New | +$1.04M |
|
2993
PUT
Denali Therapeutics
DNLI
$3.74B
| $909K | ﹤0.01% |
20,400
+19,800
| +3,300% | +$938K |
|
2994
Vir Biotechnology
VIR
$1.48B
| $908K | ﹤0.01% |
21,698
+17,311
| +395% | +$678K |
|
|
CNH
2995
PUT
CNH Industrial
CNH
$13.7B
| $907K | ﹤0.01% |
53,658
+24,129
| +82% | +$370K |
|
|
GOOS
2996
Canada Goose Holdings
GOOS
$891M
| $905K | ﹤0.01% |
24,437
-11,671
| -32% | -$478K |
|
2997
CALL
Janus International
JBI
$732M
| $905K | ﹤0.01% |
72,300
+33,500
| +86% | +$428K |
|
2998
CALL
Wyndham Hotels & Resorts
WH
$5.58B
| $905K | ﹤0.01% |
10,100
-2,400
| -19% | -$201K |
|
2999
CALL
Emcor
EME
$33B
| $904K | ﹤0.01% |
7,100
+6,800
| +2,267% | +$842K |
|
3000
PAR Technology
PAR
$682M
| $904K | ﹤0.01% |
17,136
+12,181
| +246% | +$734K |
|
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.