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 | |
|---|---|---|---|---|---|---|
5626
PUT
Destination XL Group
DXLG
$30.4M
| $147K | ﹤0.01% |
+25,900
| New | +$175K |
|
5627
PUT
New Fortress Energy
NFE
$95.9M
| $147K | ﹤0.01% |
6,100
-26,000
| -81% | -$720K |
|
5628
CALL
Spruce Power Holding Corp
SPRU
$38.9M
| $147K | ﹤0.01% |
5,563
-20,062
| -78% | -$775K |
|
5629
Tenable Holdings
TENB
$3.86B
| $147K | ﹤0.01% |
+2,685
| New | +$139K |
|
5630
WEC Energy
WEC
$35.6B
| $147K | ﹤0.01% |
1,524
-3,053
| -67% | -$279K |
|
|
TRVN
5631
CALL
DELISTED
Trevena, Inc.
TRVN
| $147K | ﹤0.01% |
405
+181
| +81% | +$100K |
|
|
VRTV
5632
CALL
DELISTED
VERITIV CORPORATION
VRTV
| $147K | ﹤0.01% |
1,200
-1,700
| -59% | -$205K |
|
|
FST
5633
DELISTED
FAST Acquisition Corp.
FST
| $147K | ﹤0.01% |
14,506
-27,625
| -66% | -$321K |
|
|
RTLR
5634
PUT
DELISTED
Rattler Midstream LP Common Units
RTLR
| $147K | ﹤0.01% |
13,000
+5,400
| +71% | +$61.8K |
|
|
CSPR
5635
CALL
DELISTED
Casper Sleep Inc.
CSPR
| $147K | ﹤0.01% |
22,100
-26,400
| -54% | -$141K |
|
5636
CALL
Donnelley Financial Solutions
DFIN
$1.2B
| $146K | ﹤0.01% |
3,100
+1,700
| +121% | +$73.7K |
|
5637
KBR
KBR
$4.68B
| $146K | ﹤0.01% |
+3,068
| New | +$135K |
|
5638
PUT
Medifast
MED
$108M
| $146K | ﹤0.01% |
700
-300
| -30% | -$62K |
|
5639
CALL
NBT Bancorp
NBTB
$2.75B
| $146K | ﹤0.01% |
3,800
+200
| +6% | +$7.46K |
|
|
PLL
5640
PUT
DELISTED
Piedmont Lithium
PLL
| $146K | ﹤0.01% |
2,800
-34,700
| -93% | -$2.03M |
|
5641
CALL
Viasat
VSAT
$11.2B
| $146K | ﹤0.01% |
3,300
-2,400
| -42% | -$124K |
|
|
SEAC
5642
DELISTED
Seachange International Inc
SEAC
| $146K | ﹤0.01% |
4,584
+2,219
| +94% | +$47.8K |
|
|
CND
5643
DELISTED
Concord Acquisition Corp.
CND
| $146K | ﹤0.01% |
+14,097
| New | +$154K |
|
5644
CALL
Genprex
GNPX
$2.4M
| $145K | ﹤0.01% |
3
+2
| +200% | +$167K |
|
5645
PUT
Monro
MNRO
$399M
| $145K | ﹤0.01% |
2,500
+700
| +39% | +$41.4K |
|
|
RDUS
5646
CALL
DELISTED
Radius Recycling
RDUS
| $145K | ﹤0.01% |
2,800
-19,300
| -87% | -$990K |
|
5647
Transocean
RIG
$5.7B
| $145K | ﹤0.01% |
52,893
-21,548
| -29% | -$73.1K |
|
5648
PUT
Shoals Technologies Group
SHLS
$1.57B
| $145K | ﹤0.01% |
6,000
-13,800
| -70% | -$397K |
|
5649
CALL
Supernus Pharmaceuticals
SUPN
$2.67B
| $145K | ﹤0.01% |
5,000
| – | – |
|
5650
CALL
Trinity Capital Inc.
TRIN
$1.6B
| $145K | ﹤0.01% |
+8,300
| New | +$138K |
|
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.