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 | |
|---|---|---|---|---|---|---|
|
DPRO
7926
PUT
Draganfly
DPRO
$152M
| $29K | ﹤0.01% |
+732
| New | +$51.9K |
|
7927
Direxion Daily MSCI Emerging Markets Bear 3X ETF
EDZ
$18.4M
| $29K | ﹤0.01% |
+313
| New | +$28.9K |
|
7928
PUT
FirstCash
FCFS
$8.84B
| $29K | ﹤0.01% |
400
+100
| +33% | +$7.69K |
|
7929
CALL
Four Corners Property Trust
FCPT
$2.78B
| $29K | ﹤0.01% |
1,000
-1,300
| -57% | -$37K |
|
7930
First Trust STOXX European Select Dividend Income Fund
FDD
$889M
| $29K | ﹤0.01% |
+2,072
| New | +$29.3K |
|
7931
PUT
Flotek Industries
FTK
$823M
| $29K | ﹤0.01% |
4,417
+600
| +16% | +$3.41K |
|
7932
CALL
Ituran Location and Control
ITRN
$1.1B
| $29K | ﹤0.01% |
1,100
+900
| +450% | +$23.6K |
|
7933
IZEA Worldwide
IZEA
$59M
| $29K | ﹤0.01% |
5,428
-12,166
| -69% | -$87.9K |
|
7934
Standard BioTools
LAB
$344M
| $29K | ﹤0.01% |
7,416
-19,017
| -72% | -$89K |
|
|
MASI
7935
CALL
DELISTED
Masimo
MASI
| $29K | ﹤0.01% |
100
-1,900
| -95% | -$541K |
|
7936
CALL
Natural Health Trends
NHTC
$14.6M
| $29K | ﹤0.01% |
4,300
+3,900
| +975% | +$27.9K |
|
7937
CALL
Nomura Holdings
NMR
$28.2B
| $29K | ﹤0.01% |
6,700
+1,600
| +31% | +$7.25K |
|
7938
CALL
NETGEAR
NTGR
$644M
| $29K | ﹤0.01% |
1,000
-11,700
| -92% | -$349K |
|
7939
CALL
PennantPark Floating Rate Capital
PFLT
$686M
| $29K | ﹤0.01% |
2,300
-22,300
| -91% | -$293K |
|
7940
PUT
Pentair
PNR
$10.5B
| $29K | ﹤0.01% |
400
-18,400
| -98% | -$1.36M |
|
7941
PUT
Pricesmart
PSMT
$5.99B
| $29K | ﹤0.01% |
400
-1,500
| -79% | -$113K |
|
7942
SI-BONE Inc
SIBN
$783M
| $29K | ﹤0.01% |
+1,342
| New | +$28.9K |
|
7943
PUT
Silgan Holdings
SLGN
$4.25B
| $29K | ﹤0.01% |
700
+400
| +133% | +$16.5K |
|
7944
CALL
SLR Investment Corp
SLRC
$685M
| $29K | ﹤0.01% |
1,600
+900
| +129% | +$17.2K |
|
7945
StoneX
SNEX
$9.25B
| $29K | ﹤0.01% |
2,440
-2,531
| -51% | -$33.2K |
|
7946
Invesco S&P 500 GARP ETF
SPGP
$2.24B
| $29K | ﹤0.01% |
+300
| New | +$27.8K |
|
|
SVM
7947
CALL
Silvercorp Metals
SVM
$2.05B
| $29K | ﹤0.01% |
7,800
-25,600
| -77% | -$104K |
|
|
TRST
7948
PUT
Trustco Bank Corp NY
TRST
$969M
| $29K | ﹤0.01% |
900
| – | – |
|
7949
Telus
TU
$14.8B
| $29K | ﹤0.01% |
+1,245
| New | +$28.5K |
|
7950
Veeco
VECO
$3.04B
| $29K | ﹤0.01% |
1,022
-734
| -42% | -$18.7K |
|
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.