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 | |
|---|---|---|---|---|---|---|
8926
PUT
Fusion Fuel Green
HTOO
$8.74M
| $11K | ﹤0.01% |
40
-34
| -46% | -$13.4K |
|
8927
IAMGOLD
IAG
$8.28B
| $11K | ﹤0.01% |
3,640
-104,043
| -97% | -$305K |
|
8928
inTEST
INTT
$160M
| $11K | ﹤0.01% |
+918
| New | +$11.9K |
|
8929
CALL
Korea Electric Power
KEP
$15B
| $11K | ﹤0.01% |
1,300
-4,300
| -77% | -$40.6K |
|
8930
CALL
Kirby Corp
KEX
$7.78B
| $11K | ﹤0.01% |
200
-2,900
| -94% | -$162K |
|
|
LGO
8931
PUT
Largo
LGO
$60.6M
| $11K | ﹤0.01% |
+1,200
| New | +$12.5K |
|
8932
PUT
MIND Technology
MIND
$45.2M
| $11K | ﹤0.01% |
660
+10
| +2% | +$166 |
|
8933
CALL
Nexa Resources
NEXA
$1.64B
| $11K | ﹤0.01% |
1,500
+300
| +25% | +$2.6K |
|
|
8934
PUT
Nexa Resources
NEXA
$1.64B
| $11K | ﹤0.01% |
1,400
+600
| +75% | +$5.2K |
|
8935
CALL
Enpro
NPO
$6.65B
| $11K | ﹤0.01% |
+100
| New | +$10K |
|
8936
Enviri
NVRI
$623M
| $11K | ﹤0.01% |
684
-1,135
| -62% | -$18.3K |
|
8937
nVent Electric
NVT
$22.9B
| $11K | ﹤0.01% |
+314
| New | +$11.1K |
|
8938
OFS Capital
OFS
$45.8M
| $11K | ﹤0.01% |
+1,082
| New | +$11.9K |
|
8939
PUT
OneSpan
OSPN
$575M
| $11K | ﹤0.01% |
700
-73,800
| -99% | -$1.38M |
|
|
PBPB
8940
PUT
DELISTED
Potbelly
PBPB
| $11K | ﹤0.01% |
2,000
-3,500
| -64% | -$20.4K |
|
8941
Pinduoduo
PDD
$122B
| $11K | ﹤0.01% |
200
-85,121
| -100% | -$6.71M |
|
|
PRPH
8942
DELISTED
ProPhase Labs
PRPH
| $11K | ﹤0.01% |
+155
| New | +$9.65K |
|
|
PTPI
8943
PUT
DELISTED
Petros Pharmaceuticals
PTPI
| $11K | ﹤0.01% |
+14
| New | +$8.2K |
|
|
REE
8944
PUT
DELISTED
REE Automotive
REE
| $11K | ﹤0.01% |
+70
| New | +$8.77K |
|
8945
PUT
RPC Inc
RES
$1.16B
| $11K | ﹤0.01% |
2,500
-25,300
| -91% | -$124K |
|
8946
PUT
Rayonier Advanced Materials
RYAM
$593M
| $11K | ﹤0.01% |
2,000
-20,300
| -91% | -$132K |
|
|
FLNA
8947
Filana Therapeutics
FLNA
$42.6M
| $11K | ﹤0.01% |
252
-56,630
| -100% | -$2.97M |
|
8948
PUT
SI-BONE Inc
SIBN
$796M
| $11K | ﹤0.01% |
500
-4,100
| -89% | -$88.3K |
|
8949
PUT
TD Synnex
SNX
$19.7B
| $11K | ﹤0.01% |
100
-16,200
| -99% | -$1.76M |
|
8950
CALL
SPX Corp
SPXC
$10.3B
| $11K | ﹤0.01% |
200
+100
| +100% | +$6.06K |
|
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.