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 | |
|---|---|---|---|---|---|---|
|
GTY
8601
PUT
Getty Realty Corp
GTY
$2.16B
| $16K | ﹤0.01% |
500
-5,500
| -92% | -$174K |
|
8602
CALL
Harrow
HROW
$1.44B
| $16K | ﹤0.01% |
1,900
-35,400
| -95% | -$350K |
|
8603
Intellicheck
IDN
$75.1M
| $16K | ﹤0.01% |
+3,662
| New | +$25.2K |
|
8604
PUT
INmune Bio
INMB
$45.5M
| $16K | ﹤0.01% |
1,600
-1,700
| -52% | -$25.2K |
|
8605
Samsara
IOT
$22.6B
| $16K | ﹤0.01% |
+581
| New | +$15.1K |
|
8606
PUT
IT Tech Packaging
ITP
$2.85M
| $16K | ﹤0.01% |
7,290
+2,090
| +40% | +$7.04K |
|
8607
PUT
Jack Henry & Associates
JKHY
$11.5B
| $16K | ﹤0.01% |
100
-900
| -90% | -$146K |
|
8608
PUT
MacroGenics
MGNX
$233M
| $16K | ﹤0.01% |
1,000
-14,800
| -94% | -$279K |
|
8609
CALL
Martin Midstream Partners
MMLP
$95.5M
| $16K | ﹤0.01% |
6,200
+3,600
| +138% | +$11K |
|
8610
CALL
Movado Group
MOV
$840M
| $16K | ﹤0.01% |
400
-400
| -50% | -$15.1K |
|
8611
PUT
NN Inc
NNBR
$237M
| $16K | ﹤0.01% |
4,000
+2,600
| +186% | +$12.7K |
|
8612
Oriental Culture Holding
OCG
$3.24M
| $16K | ﹤0.01% |
+1
| New | +$14.4K |
|
8613
ALPS O'Shares Global Internet Giants ETF
OGIG
$103M
| $16K | ﹤0.01% |
326
-1,268
| -80% | -$67.7K |
|
8614
PUT
QuickLogic
QUIK
$211M
| $16K | ﹤0.01% |
3,300
-7,200
| -69% | -$41.9K |
|
8615
CALL
Ribbon Communications
RBBN
$388M
| $16K | ﹤0.01% |
2,700
-14,100
| -84% | -$83.6K |
|
8616
SCYNEXIS
SCYX
$37.4M
| $16K | ﹤0.01% |
+331
| New | +$16.3K |
|
|
SNCY
8617
PUT
DELISTED
Sun Country Airlines
SNCY
| $16K | ﹤0.01% |
+600
| New | +$17.9K |
|
8618
CALL
Tucows
TCX
$105M
| $16K | ﹤0.01% |
200
-300
| -60% | -$25.1K |
|
8619
PUT
Tetra Tech
TTEK
$8.75B
| $16K | ﹤0.01% |
500
-500
| -50% | -$17.2K |
|
8620
PUT
Voyager Therapeutics
VYGR
$181M
| $16K | ﹤0.01% |
6,100
+4,400
| +259% | +$15K |
|
|
WKEY
8621
PUT
WISeKey
WKEY
$67.3M
| $16K | ﹤0.01% |
820
-920
| -53% | -$24.4K |
|
8622
Zai Lab
ZLAB
$2.07B
| $16K | ﹤0.01% |
261
-84
| -24% | -$7.12K |
|
8623
Metallus
MTUS
$833M
| $16K | ﹤0.01% |
1,020
-17,269
| -94% | -$252K |
|
8624
NextTrip
NTRP
$24.5M
| $16K | ﹤0.01% |
453
-3,155
| -87% | -$165K |
|
|
PWSC
8625
CALL
DELISTED
PowerSchool Holdings, Inc.
PWSC
| $16K | ﹤0.01% |
+1,000
| New | +$21.4K |
|
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.