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 | |
|---|---|---|---|---|---|---|
6051
KULR Technology Group
KULR
$130M
| $113K | ﹤0.01% |
+5,153
| New | +$119K |
|
6052
PUT
Ocular Therapeutix
OCUL
$1.89B
| $113K | ﹤0.01% |
16,300
-30,200
| -65% | -$235K |
|
6053
CALL
Talkspace
TALK
$863M
| $113K | ﹤0.01% |
57,800
-23,100
| -29% | -$66.1K |
|
6054
CALL
TETRA Technologies
TTI
$1.28B
| $113K | ﹤0.01% |
40,100
-12,800
| -24% | -$39.4K |
|
|
NPTN
6055
CALL
DELISTED
NEOPHOTONICS CORP
NPTN
| $113K | ﹤0.01% |
7,400
+2,100
| +40% | +$27.6K |
|
|
AHRT
6056
PUT
AH Realty Trust
AHRT
$539M
| $112K | ﹤0.01% |
7,400
-3,000
| -29% | -$43.2K |
|
6057
CALL
Donaldson
DCI
$11.4B
| $112K | ﹤0.01% |
1,900
+900
| +90% | +$53.3K |
|
6058
CALL
Ecopetrol
EC
$33.5B
| $112K | ﹤0.01% |
8,700
+4,700
| +118% | +$67.1K |
|
6059
CALL
Kiniksa Pharmaceuticals
KNSA
$5.93B
| $112K | ﹤0.01% |
9,600
+4,900
| +104% | +$60.2K |
|
|
LITS
6060
PUT
Lite Strategy Inc
LITS
$32.1M
| $112K | ﹤0.01% |
+2,100
| New | +$117K |
|
6061
CALL
Ramaco Resources Class A
METC
$630M
| $112K | ﹤0.01% |
+8,579
| New | +$111K |
|
6062
PUT
MarketWise
MKTW
$56.5M
| $112K | ﹤0.01% |
+745
| New | +$106K |
|
6063
Madison Square Garden
MSGS
$9.51B
| $112K | ﹤0.01% |
647
-4,312
| -87% | -$783K |
|
6064
Stratasys
SSYS
$764M
| $112K | ﹤0.01% |
+4,608
| New | +$128K |
|
6065
CALL
TFI International
TFII
$11.6B
| $112K | ﹤0.01% |
+1,000
| New | +$109K |
|
|
UXIN
6066
PUT
Uxin Ltd
UXIN
$275M
| $112K | ﹤0.01% |
712
-1,634
| -70% | -$351K |
|
|
KLRS
6067
Kalaris Therapeutics
KLRS
$103M
| $112K | ﹤0.01% |
378
+374
| +9,350% | +$174K |
|
|
GATO
6068
PUT
DELISTED
Gatos Silver, Inc.
GATO
| $112K | ﹤0.01% |
10,800
+5,700
| +112% | +$68.5K |
|
|
WWE
6069
DELISTED
World Wrestling Entertainment
WWE
| $112K | ﹤0.01% |
2,277
-558
| -20% | -$30.4K |
|
|
SJR
6070
CALL
DELISTED
Shaw Communications Inc.
SJR
| $112K | ﹤0.01% |
3,700
+400
| +12% | +$11.7K |
|
|
CLVS
6071
PUT
DELISTED
Clovis Oncology, Inc.
CLVS
| $112K | ﹤0.01% |
41,400
-21,700
| -34% | -$80.2K |
|
|
APLT
6072
CALL
DELISTED
Applied Therapeutics
APLT
| $111K | ﹤0.01% |
+12,500
| New | +$164K |
|
6073
PUT
ATI
ATI
$27.3B
| $111K | ﹤0.01% |
7,000
-8,500
| -55% | -$136K |
|
6074
American Vanguard Corp
AVD
$71.2M
| $111K | ﹤0.01% |
6,789
+6,147
| +957% | +$96.3K |
|
6075
CALL
Vertical Aerospace
EVTL
$176M
| $111K | ﹤0.01% |
+1,650
| New | +$155K |
|
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.