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 | |
|---|---|---|---|---|---|---|
4776
First Trust Natural Gas ETF
FCG
$647M
| $261K | ﹤0.01% |
15,235
+8,947
| +142% | +$161K |
|
4777
Qfin Holdings
QFIN
$1.69B
| $261K | ﹤0.01% |
11,399
-19,232
| -63% | -$428K |
|
|
SGEN
4778
DELISTED
Seagen Inc. Common Stock
SGEN
| $261K | ﹤0.01% |
1,694
-5,217
| -75% | -$874K |
|
4779
iShares Asia 50 ETF
AIA
$4.6B
| $260K | ﹤0.01% |
3,398
+1,244
| +58% | +$98.3K |
|
4780
PUT
Amkor Technology
AMKR
$12.4B
| $260K | ﹤0.01% |
10,500
+5,600
| +114% | +$130K |
|
|
BLCN
4781
DELISTED
Siren ETF Trust Siren NexGen Economy ETF
BLCN
| $260K | ﹤0.01% |
6,123
-2,660
| -30% | -$125K |
|
4782
Cellebrite
CLBT
$3.68B
| $260K | ﹤0.01% |
+32,424
| New | +$305K |
|
4783
PUT
Wheels Up
UP
$208M
| $260K | ﹤0.01% |
+281
| New | +$328K |
|
|
CLVR
4784
CALL
DELISTED
Clever Leaves Holdings Inc. Common Shares
CLVR
| $260K | ﹤0.01% |
2,803
-1,180
| -30% | -$197K |
|
|
MNR
4785
CALL
DELISTED
Monmouth Real Estate Investment Corp
MNR
| $260K | ﹤0.01% |
12,400
-10,700
| -46% | -$216K |
|
|
AMED
4786
CALL
DELISTED
Amedisys
AMED
| $259K | ﹤0.01% |
1,600
+1,400
| +700% | +$225K |
|
|
LONA
4787
PUT
LeonaBio Inc
LONA
$66.3M
| $259K | ﹤0.01% |
1,990
+210
| +12% | +$26.6K |
|
4788
CALL
BARK
BARK
$81.8M
| $259K | ﹤0.01% |
3,075
-7,915
| -72% | -$907K |
|
4789
CALL
Equitable Holdings
EQH
$13B
| $259K | ﹤0.01% |
7,900
+3,600
| +84% | +$118K |
|
|
KZR
4790
DELISTED
Kezar Life Sciences
KZR
| $259K | ﹤0.01% |
+1,551
| New | +$175K |
|
4791
PUT
Medallion Financial
MFIN
$229M
| $259K | ﹤0.01% |
44,800
+42,600
| +1,936% | +$353K |
|
4792
PUT
Pitney Bowes
PBI
$2.4B
| $259K | ﹤0.01% |
39,200
-13,400
| -25% | -$95K |
|
4793
Robert Half
RHI
$3.87B
| $259K | ﹤0.01% |
2,328
-2,824
| -55% | -$314K |
|
4794
CALL
Wingstop
WING
$3.53B
| $259K | ﹤0.01% |
1,500
-6,000
| -80% | -$1.01M |
|
|
WPRT
4795
Westport Fuel Systems
WPRT
$33.4M
| $259K | ﹤0.01% |
10,968
+4,099
| +60% | +$117K |
|
|
EGIO
4796
PUT
DELISTED
Edgio, Inc. Common Stock
EGIO
| $259K | ﹤0.01% |
1,895
-2,570
| -58% | -$305K |
|
|
CRU
4797
CALL
DELISTED
Crucible Acquisition Corporation
CRU
| $259K | ﹤0.01% |
+26,600
| New | +$260K |
|
|
EPAY
4798
CALL
DELISTED
Bottomline Technologies Inc
EPAY
| $259K | ﹤0.01% |
4,600
+4,300
| +1,433% | +$201K |
|
|
JOBS
4799
PUT
DELISTED
51job Inc
JOBS
| $259K | ﹤0.01% |
5,300
+4,100
| +342% | +$234K |
|
4800
PUT
Bio-Techne
TECH
$11.2B
| $258K | ﹤0.01% |
2,000
+1,600
| +400% | +$196K |
|
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.