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 | |
|---|---|---|---|---|---|---|
376
CALL
Eli Lilly
LLY
$1.04T
| $30.3M | 0.03% |
109,800
-87,200
| -44% | -$22.1M |
|
377
PUT
3M
MMM
$89.1B
| $30M | 0.03% |
202,244
-39,707
| -16% | -$5.92M |
|
378
PUT
First Solar
FSLR
$22.4B
| $30M | 0.03% |
344,200
+80,800
| +31% | +$8.31M |
|
379
CALL
Enphase Energy
ENPH
$5.22B
| $29.8M | 0.03% |
162,800
-76,400
| -32% | -$15.9M |
|
|
SCIU
380
PUT
DELISTED
Global X Scientific Beta US ETF
SCIU
| $29.7M | 0.03% |
1,050,000
+679,200
| +183% | +$19.2M |
|
381
PUT
Dick's Sporting Goods
DKS
$18.8B
| $29.7M | 0.03% |
257,900
+130,000
| +102% | +$15.6M |
|
382
PUT
PENN Entertainment
PENN
$2.8B
| $29.7M | 0.03% |
571,900
+60,400
| +12% | +$3.66M |
|
383
PUT
Humana
HUM
$47.7B
| $29.5M | 0.03% |
63,500
+36,100
| +132% | +$16M |
|
384
PUT
RH
RH
$3.31B
| $29.4M | 0.03% |
54,800
-10,800
| -16% | -$6.64M |
|
385
CALL
Occidental Petroleum
OXY
$57.2B
| $29.1M | 0.03% |
1,096,200
+328,000
| +43% | +$10.3M |
|
386
CALL
Charter Communications
CHTR
$15.9B
| $29M | 0.03% |
44,500
+8,500
| +24% | +$5.79M |
|
387
PUT
Las Vegas Sands
LVS
$30B
| $29M | 0.03% |
770,600
+404,600
| +111% | +$15.6M |
|
388
PUT
Regeneron Pharmaceuticals
REGN
$68.3B
| $29M | 0.03% |
45,900
+20,000
| +77% | +$12.3M |
|
|
389
CALL
Las Vegas Sands
LVS
$30B
| $28.7M | 0.03% |
761,400
-301,200
| -28% | -$11.6M |
|
390
PUT
Chewy
CHWY
$8.81B
| $28.6M | 0.03% |
485,200
-327,700
| -40% | -$21.4M |
|
391
PUT
Lyft
LYFT
$5.57B
| $28.6M | 0.03% |
668,600
+113,300
| +20% | +$5.3M |
|
392
PUT
BP
BP
$112B
| $28.5M | 0.03% |
1,071,800
-221,900
| -17% | -$6.15M |
|
|
393
KraneShares CSI China Internet ETF
KWEB
$5.23B
| $28.5M | 0.03% |
780,883
+740,902
| +1,853% | +$34.1M |
|
394
PUT
Marathon Digital Holdings
MARA
$4.73B
| $28.5M | 0.03% |
866,200
+144,800
| +20% | +$6.93M |
|
395
Ford
F
$57.5B
| $28.4M | 0.03% |
1,367,974
+1,060,211
| +344% | +$19.5M |
|
396
CALL
Lennar Class A
LEN
$19.8B
| $28.2M | 0.03% |
250,399
+94,003
| +60% | +$9.61M |
|
|
PXD
397
PUT
DELISTED
Pioneer Natural Resource Co.
PXD
| $28M | 0.03% |
154,000
+45,000
| +41% | +$8.28M |
|
398
CALL
CrowdStrike
CRWD
$192B
| $28M | 0.03% |
546,400
-303,600
| -36% | -$18.5M |
|
399
CALL
Petrobras
PBR
$122B
| $27.9M | 0.03% |
2,542,100
+1,190,200
| +88% | +$12.6M |
|
400
CALL
Beyond Meat
BYND
$307M
| $27.9M | 0.03% |
428,000
-61,800
| -13% | -$5.26M |
|
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.