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 | |
|---|---|---|---|---|---|---|
|
GOLD
6951
CALL
Gold.com Inc
GOLD
$1.2B
| $61K | ﹤0.01% |
+2,000
| New | +$66.9K |
|
6952
CALL
AptarGroup
ATR
$8.55B
| $61K | ﹤0.01% |
500
+100
| +25% | +$12.4K |
|
6953
BioCryst Pharmaceuticals
BCRX
$2.28B
| $61K | ﹤0.01% |
4,420
-47,315
| -91% | -$626K |
|
|
BLUE
6954
CALL
DELISTED
bluebird bio
BLUE
| $61K | ﹤0.01% |
990
+172
| +21% | +$40.6K |
|
6955
CALL
CNA Financial
CNA
$14.2B
| $61K | ﹤0.01% |
1,400
+1,200
| +600% | +$53.4K |
|
6956
Caribou Biosciences
CRBU
$145M
| $61K | ﹤0.01% |
+4,106
| New | +$79.9K |
|
6957
PUT
iShares Core Dividend ETF
DIVB
$1.69B
| $61K | ﹤0.01% |
1,200
+800
| +200% | +$33.1K |
|
6958
CALL
Eterna Therapeutics
ERNA
$3.83M
| $61K | ﹤0.01% |
2
+1
| +100% | +$54.4K |
|
6959
CALL
Evolv Technologies
EVLV
$995M
| $61K | ﹤0.01% |
+13,800
| New | +$77.4K |
|
6960
CALL
American Express Global Business Travel
GBTG
$4.93B
| $61K | ﹤0.01% |
+6,200
| New | +$61K |
|
6961
CALL
CGI
GIB
$15.1B
| $61K | ﹤0.01% |
700
-3,400
| -83% | -$298K |
|
6962
Hess Midstream
HESM
$5.24B
| $61K | ﹤0.01% |
+2,213
| New | +$57.4K |
|
|
HPP
6963
PUT
Hudson Pacific Properties
HPP
$747M
| $61K | ﹤0.01% |
357
-386
| -52% | -$70.3K |
|
6964
VanEck High Yield Muni ETF
HYD
$4.43B
| $61K | ﹤0.01% |
981
-734
| -43% | -$45.7K |
|
6965
PUT
Icon
ICLR
$12.6B
| $61K | ﹤0.01% |
200
-1,700
| -89% | -$476K |
|
6966
InfuSystem Holdings
INFU
$184M
| $61K | ﹤0.01% |
+3,592
| New | +$57K |
|
6967
PUT
International Seaways
INSW
$4.76B
| $61K | ﹤0.01% |
4,200
+3,600
| +600% | +$59.6K |
|
6968
CALL
Independence Realty Trust
IRT
$3.92B
| $61K | ﹤0.01% |
2,400
+1,600
| +200% | +$37.9K |
|
6969
Koppers
KOP
$943M
| $61K | ﹤0.01% |
+1,968
| New | +$64.3K |
|
6970
CALL
Liquidia Corp
LQDA
$7.48B
| $61K | ﹤0.01% |
12,600
+2,100
| +20% | +$8.37K |
|
6971
PUT
LSB Industries
LXU
$783M
| $61K | ﹤0.01% |
5,570
+5,180
| +1,328% | +$49K |
|
6972
Protagonist Therapeutics
PTGX
$8.79B
| $61K | ﹤0.01% |
+1,804
| New | +$57K |
|
6973
PUT
Rush Enterprises Class A
RUSHA
$6.2B
| $61K | ﹤0.01% |
1,650
-4,200
| -72% | -$147K |
|
6974
SFL Corp
SFL
$1.64B
| $61K | ﹤0.01% |
7,549
-14,792
| -66% | -$123K |
|
6975
PUT
Silicon Laboratories
SLAB
$7.17B
| $61K | ﹤0.01% |
300
+100
| +50% | +$18.4K |
|
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.