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 | |
|---|---|---|---|---|---|---|
401
CALL
Riot Platforms
RIOT
$8.84B
| $27.8M | 0.03% |
1,245,400
+498,100
| +67% | +$14.8M |
|
402
CALL
Carvana
CVNA
$44.9B
| $27.8M | 0.03% |
599,500
+228,500
| +62% | +$12.6M |
|
403
PUT
SoFi Technologies
SOFI
$21.9B
| $27.8M | 0.03% |
1,755,700
+972,700
| +124% | +$17.9M |
|
404
PUT
Vale
VALE
$63.2B
| $27.7M | 0.03% |
1,979,200
+161,800
| +9% | +$2.15M |
|
405
CALL
Newmont
NEM
$102B
| $27.5M | 0.03% |
443,100
+121,200
| +38% | +$6.87M |
|
406
CALL
Lyft
LYFT
$5.57B
| $27.5M | 0.03% |
643,100
+318,300
| +98% | +$14.9M |
|
407
CALL
Alcoa
AA
$12.2B
| $27.4M | 0.03% |
460,700
+86,600
| +23% | +$4.34M |
|
408
CALL
Live Nation Entertainment
LYV
$41.4B
| $27.4M | 0.03% |
229,000
+164,600
| +256% | +$17.7M |
|
409
PUT
Take-Two Interactive
TTWO
$43.4B
| $27.4M | 0.03% |
154,100
-36,200
| -19% | -$6.31M |
|
410
CALL
First Solar
FSLR
$22.4B
| $27.4M | 0.03% |
314,200
+40,000
| +15% | +$4.11M |
|
411
CALL
Match Group
MTCH
$8.87B
| $27.3M | 0.03% |
206,700
+122,100
| +144% | +$17.7M |
|
412
PUT
Tyson Foods
TSN
$20.1B
| $27.1M | 0.03% |
311,400
+125,500
| +68% | +$10.3M |
|
|
TYNS
413
CALL
DELISTED
Direxion Daily 7-10 Year Treasury Bear 1X Shares
TYNS
| $27M | 0.03% |
207,900
-14,100
| -6% | -$1.83M |
|
414
CALL
D.R. Horton
DHI
$40.4B
| $26.7M | 0.03% |
246,100
-102,300
| -29% | -$9.85M |
|
415
CALL
ZIM Integrated Shipping Services
ZIM
$3.01B
| $26.6M | 0.03% |
452,000
+371,600
| +462% | +$19M |
|
|
SCIU
416
CALL
DELISTED
Global X Scientific Beta US ETF
SCIU
| $26.3M | 0.03% |
890,500
+280,100
| +46% | +$8.27M |
|
417
PUT
Strategy Inc
MSTR
$36.3B
| $26.3M | 0.03% |
483,000
-498,000
| -51% | -$34.2M |
|
418
PUT
lululemon athletica
LULU
$12.9B
| $26.1M | 0.03% |
66,700
+3,100
| +5% | +$1.32M |
|
419
CALL
Avis
CAR
$5.81B
| $26M | 0.03% |
125,200
+6,100
| +5% | +$1.35M |
|
420
CALL
Royal Caribbean
RCL
$76.7B
| $25.8M | 0.03% |
336,000
-22,100
| -6% | -$1.8M |
|
421
CALL
ArcelorMittal
MT
$50.1B
| $25.8M | 0.03% |
809,900
+391,100
| +93% | +$12.1M |
|
422
PUT
Bilibili
BILI
$7.4B
| $25.7M | 0.03% |
553,800
+291,200
| +111% | +$19.5M |
|
|
423
CALL
Vale
VALE
$63.2B
| $25.7M | 0.03% |
1,830,500
+174,500
| +11% | +$2.32M |
|
424
CALL
PENN Entertainment
PENN
$2.8B
| $25.5M | 0.03% |
492,100
+55,000
| +13% | +$3.33M |
|
425
PUT
Macy's
M
$6.4B
| $25.4M | 0.03% |
971,000
+276,100
| +40% | +$7.53M |
|
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.