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 | |
|---|---|---|---|---|---|---|
4926
CALL
CarParts.com
PRTS
$43.7M
| $237K | ﹤0.01% |
2,120
-2,450
| -54% | -$337K |
|
4927
CALL
SCYNEXIS
SCYX
$48.1M
| $237K | ﹤0.01% |
4,875
-1,963
| -29% | -$96.6K |
|
|
TRVG
4928
trivago
TRVG
$373M
| $237K | ﹤0.01% |
21,792
-7,180
| -25% | -$86.6K |
|
|
ASTR
4929
CALL
DELISTED
Astra Space, Inc. Class A Common Stock
ASTR
| $237K | ﹤0.01% |
2,280
-5,120
| -69% | -$703K |
|
4930
PUT
Immunovant
IMVT
$7.93B
| $236K | ﹤0.01% |
27,700
-5,600
| -17% | -$46.2K |
|
4931
CALL
Paylocity
PCTY
$7.38B
| $236K | ﹤0.01% |
1,000
+900
| +900% | +$239K |
|
4932
Wheels Up
UP
$208M
| $236K | ﹤0.01% |
+255
| New | +$298K |
|
|
WBX
4933
PUT
Wallbox
WBX
$77.9M
| $236K | ﹤0.01% |
+725
| New | +$199K |
|
4934
Arcturus Therapeutics
ARCT
$164M
| $235K | ﹤0.01% |
6,371
+5,569
| +694% | +$227K |
|
|
CIM
4935
PUT
Chimera Investment
CIM
$1.04B
| $235K | ﹤0.01% |
5,200
-1,033
| -17% | -$48.8K |
|
4936
CALL
Huazhu Hotels Group
HTHT
$13.1B
| $235K | ﹤0.01% |
6,300
+5,500
| +688% | +$240K |
|
|
BCIC
4937
PUT
BCP Investment Corp
BCIC
$89.1M
| $235K | ﹤0.01% |
9,500
-3,500
| -27% | -$85.8K |
|
4938
PUT
Sabra Healthcare REIT
SBRA
$5.34B
| $235K | ﹤0.01% |
17,400
+13,500
| +346% | +$191K |
|
4939
TAL Education Group
TAL
$6.93B
| $235K | ﹤0.01% |
59,936
-296,646
| -83% | -$1.34M |
|
|
XXII
4940
PUT
22nd Century Group
XXII
$1.38M
| – | – |
0
| – | – |
|
|
BECN
4941
CALL
DELISTED
Beacon Roofing Supply, Inc.
BECN
| $235K | ﹤0.01% |
4,100
-16,700
| -80% | -$900K |
|
|
VLTA
4942
DELISTED
Volta Inc.
VLTA
| $235K | ﹤0.01% |
+32,105
| New | +$282K |
|
4943
PUT
Curis
CRIS
$9.78M
| $234K | ﹤0.01% |
123
-47
| -28% | -$112K |
|
|
DRD
4944
CALL
DRDGold
DRD
$1.77B
| $234K | ﹤0.01% |
27,700
-15,100
| -35% | -$135K |
|
4945
PUT
Fate Therapeutics
FATE
$286M
| $234K | ﹤0.01% |
4,000
+3,200
| +400% | +$181K |
|
4946
CALL
Nordic American Tanker
NAT
$1.38B
| $234K | ﹤0.01% |
139,000
+60,100
| +76% | +$129K |
|
|
OLO
4947
DELISTED
Olo Inc
OLO
| $234K | ﹤0.01% |
11,283
-131,947
| -92% | -$3.43M |
|
4948
Rigel Pharmaceuticals
RIGL
$681M
| $234K | ﹤0.01% |
8,838
+2,933
| +50% | +$88.5K |
|
|
OLOX
4949
Olenox Industries
OLOX
$6.74M
| $234K | ﹤0.01% |
+21
| New | +$341K |
|
|
SII
4950
CALL
Sprott
SII
$2.66B
| $234K | ﹤0.01% |
5,200
-28,400
| -85% | -$1.2M |
|
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.