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 | |
|---|---|---|---|---|---|---|
3376
Sprinklr
CXM
$1.49B
| $691K | ﹤0.01% |
+43,600
| New | +$713K |
|
3377
PUT
Equinox Gold
EQX
$7.2B
| $691K | ﹤0.01% |
102,300
-71,600
| -41% | -$523K |
|
3378
PUT
Fortuna Silver Mines
FSM
$2.55B
| $691K | ﹤0.01% |
177,300
-28,300
| -14% | -$116K |
|
3379
PUT
InfuSystem Holdings
INFU
$199M
| $691K | ﹤0.01% |
+40,600
| New | +$644K |
|
3380
CALL
Spire Global
SPIR
$433M
| $691K | ﹤0.01% |
+25,563
| New | +$1.03M |
|
|
RTLR
3381
CALL
DELISTED
Rattler Midstream LP Common Units
RTLR
| $691K | ﹤0.01% |
60,800
+18,900
| +45% | +$216K |
|
3382
CALL
Globant
GLOB
$1.52B
| $690K | ﹤0.01% |
2,200
-600
| -21% | -$178K |
|
3383
PUT
SunCoke Energy
SXC
$783M
| $690K | ﹤0.01% |
104,800
+104,300
| +20,860% | +$691K |
|
3384
CALL
Neurocrine Biosciences
NBIX
$18.3B
| $689K | ﹤0.01% |
8,100
-28,900
| -78% | -$2.66M |
|
|
LGMK
3385
CALL
DELISTED
LogicMark
LGMK
| $688K | ﹤0.01% |
450
+421
| +1,452% | +$689K |
|
3386
CALL
SL Green Realty
SLG
$3.8B
| $688K | ﹤0.01% |
9,315
-4,487
| -33% | -$330K |
|
3387
PUT
Zions Bancorporation
ZION
$10.1B
| $688K | ﹤0.01% |
10,900
+6,700
| +160% | +$428K |
|
|
GOL
3388
DELISTED
Gol Linhas Aéreas Inteligentes S.A. American Depositary Shares (Each representing Ten Preferred Shares)
GOL
| $687K | ﹤0.01% |
113,565
+78,454
| +223% | +$501K |
|
3389
Petco
WOOF
$802M
| $686K | ﹤0.01% |
34,712
+9,523
| +38% | +$208K |
|
3390
CALL
Alta Equipment Group
ALTG
$211M
| $685K | ﹤0.01% |
46,800
+45,700
| +4,155% | +$671K |
|
3391
PUT
AdvanSix
ASIX
$551M
| $685K | ﹤0.01% |
14,500
+13,800
| +1,971% | +$636K |
|
3392
PUT
Fastenal
FAST
$55.1B
| $685K | ﹤0.01% |
21,400
-35,400
| -62% | -$1.04M |
|
3393
CALL
Flex
FLEX
$40.7B
| $685K | ﹤0.01% |
49,630
-76,568
| -61% | -$1.04M |
|
3394
PUT
New York Times
NYT
$12.2B
| $685K | ﹤0.01% |
14,200
-92,500
| -87% | -$4.57M |
|
3395
CALL
Matsons
MATX
$6.11B
| $684K | ﹤0.01% |
7,600
+500
| +7% | +$42.6K |
|
3396
PUT
ADT
ADT
$5.32B
| $683K | ﹤0.01% |
81,300
+57,500
| +242% | +$490K |
|
3397
PUT
Shenandoah Telecom
SHEN
$666M
| $683K | ﹤0.01% |
26,800
-27,700
| -51% | -$778K |
|
3398
PUT
Black Stone Minerals
BSM
$3.14B
| $682K | ﹤0.01% |
66,100
+32,100
| +94% | +$370K |
|
3399
CALL
Rambus
RMBS
$9.45B
| $681K | ﹤0.01% |
23,200
-27,500
| -54% | -$699K |
|
|
SGEN
3400
PUT
DELISTED
Seagen Inc. Common Stock
SGEN
| $680K | ﹤0.01% |
4,400
-3,500
| -44% | -$586K |
|
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.