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 | |
|---|---|---|---|---|---|---|
3251
PUT
Purple Innovation
PRPL
$35.8M
| $757K | ﹤0.01% |
2,284
+1,464
| +179% | +$567K |
|
3252
PUT
Planet Labs
PL
$7.48B
| $756K | ﹤0.01% |
+123,000
| New | +$1.17M |
|
3253
PUT
Green Brick Partners
GRBK
$3.12B
| $755K | ﹤0.01% |
24,900
+6,300
| +34% | +$165K |
|
3254
PUT
Inovio Pharmaceuticals
INO
$79.4M
| $755K | ﹤0.01% |
12,625
-7,808
| -38% | -$626K |
|
|
MAPS
3255
DELISTED
WM TECHNOLOGY INC A
MAPS
| $755K | ﹤0.01% |
126,414
+124,519
| +6,571% | +$1.22M |
|
3256
CALL
TaskUs
TASK
$531M
| $755K | ﹤0.01% |
+14,000
| New | +$763K |
|
3257
CALL
Alight
ALIT
$520M
| $754K | ﹤0.01% |
+3,490
| New | +$757K |
|
3258
Conduent
CNDT
$234M
| $754K | ﹤0.01% |
+141,372
| New | +$844K |
|
3259
CALL
Xponential Fitness
XPOF
$278M
| $754K | ﹤0.01% |
+36,900
| New | +$685K |
|
3260
CALL
Icahn Enterprises
IEP
$5.19B
| $753K | ﹤0.01% |
15,200
+9,800
| +181% | +$522K |
|
3261
PUT
SouthState Bank Corp
SSB
$10.2B
| $753K | ﹤0.01% |
9,400
+4,200
| +81% | +$334K |
|
3262
CALL
Methanex
MEOH
$4.19B
| $751K | ﹤0.01% |
19,000
-3,100
| -14% | -$138K |
|
|
UCTT
3263
CALL
Ultra Clean Holdings
UCTT
$3.9B
| $751K | ﹤0.01% |
13,100
-2,100
| -14% | -$109K |
|
|
PLCY
3264
CALL
DELISTED
EventShares U.S. Legislative Opportunities ETF
PLCY
| $750K | ﹤0.01% |
140,500
+75,400
| +116% | +$402K |
|
3265
CALL
Smith & Wesson
SWBI
$666M
| $748K | ﹤0.01% |
42,300
-136,300
| -76% | -$2.81M |
|
3266
PUT
TG Therapeutics
TGTX
$8.53B
| $748K | ﹤0.01% |
39,400
+13,400
| +52% | +$348K |
|
3267
CALL
Check Point Software Technologies
CHKP
$13.6B
| $745K | ﹤0.01% |
6,400
-29,800
| -82% | -$3.45M |
|
|
RIDE
3268
CALL
DELISTED
Lordstown Motors Corp. Class A Common Stock
RIDE
| $744K | ﹤0.01% |
14,393
-9,554
| -40% | -$693K |
|
3269
First Trust NASDAQ Cybersecurity ETF
CIBR
$14B
| $743K | ﹤0.01% |
14,076
+1,101
| +8% | +$57.9K |
|
3270
PUT
Opko Health
OPK
$936M
| $743K | ﹤0.01% |
154,500
+115,300
| +294% | +$467K |
|
3271
PUT
Sportsman's Warehouse
SPWH
$44.9M
| $743K | ﹤0.01% |
63,000
+26,500
| +73% | +$416K |
|
3272
XPO
XPO
$24.4B
| $743K | ﹤0.01% |
16,170
-7,352
| -31% | -$342K |
|
3273
CALL
eHealth
EHTH
$43.2M
| $742K | ﹤0.01% |
29,100
+15,700
| +117% | +$522K |
|
3274
CALL
Energizer
ENR
$1.44B
| $741K | ﹤0.01% |
18,500
-15,800
| -46% | -$607K |
|
3275
CALL
Mattel
MAT
$4.3B
| $741K | ﹤0.01% |
34,400
-11,800
| -26% | -$248K |
|
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.