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 | |
|---|---|---|---|---|---|---|
951
CALL
C.H. Robinson
CHRW
$24.2B
| $7.5M | 0.01% |
69,700
+13,600
| +24% | +$1.32M |
|
|
K
952
PUT
DELISTED
Kellanova
K
| $7.5M | 0.01% |
123,966
+43,239
| +54% | +$2.55M |
|
953
PUT
Ambarella
AMBA
$3.09B
| $7.49M | 0.01% |
36,900
+12,700
| +52% | +$2.35M |
|
954
PUT
Nasdaq
NDAQ
$51.1B
| $7.46M | 0.01% |
106,500
+34,500
| +48% | +$2.35M |
|
|
ZEN
955
DELISTED
ZENDESK INC
ZEN
| $7.45M | 0.01% |
+71,396
| New | +$7.65M |
|
956
PUT
Restaurant Brands International
QSR
$25.1B
| $7.44M | 0.01% |
122,600
+56,800
| +86% | +$3.35M |
|
957
CALL
Ternium
TX
$9.25B
| $7.42M | 0.01% |
170,400
+50,400
| +42% | +$2.12M |
|
|
BBBY
958
PUT
DELISTED
Bed Bath & Beyond Inc
BBBY
| $7.41M | 0.01% |
508,100
-153,100
| -23% | -$2.68M |
|
959
PUT
DuPont de Nemours
DD
$18.6B
| $7.4M | 0.01% |
72,975
+9,401
| +15% | +$895K |
|
960
PUT
Lithia Motors
LAD
$7.62B
| $7.39M | 0.01% |
24,900
+200
| +0.8% | +$61.8K |
|
961
CALL
Asana
ASAN
$1.51B
| $7.39M | 0.01% |
99,100
-37,200
| -27% | -$3.94M |
|
|
962
Micron Technology
MU
$1.12T
| $7.39M | 0.01% |
79,305
-303,810
| -79% | -$23.7M |
|
963
CALL
Aurinia Pharmaceuticals
AUPH
$1.96B
| $7.38M | 0.01% |
322,700
+149,200
| +86% | +$3.54M |
|
964
PUT
Illinois Tool Works
ITW
$79.7B
| $7.38M | 0.01% |
29,900
+10,800
| +57% | +$2.51M |
|
965
CALL
Elevance Health
ELV
$82.3B
| $7.37M | 0.01% |
15,900
-8,300
| -34% | -$3.49M |
|
966
PUT
Toll Brothers
TOL
$13.7B
| $7.37M | 0.01% |
101,800
+51,600
| +103% | +$3.32M |
|
967
CALL
Tyson Foods
TSN
$20B
| $7.35M | 0.01% |
84,300
+28,800
| +52% | +$2.37M |
|
968
Kohl's
KSS
$2.06B
| $7.34M | 0.01% |
148,658
+147,540
| +13,197% | +$7.54M |
|
969
Dick's Sporting Goods
DKS
$18.3B
| $7.34M | 0.01% |
+63,816
| New | +$7.65M |
|
970
State Street Materials Select Sector SPDR ETF
XLB
$8.35B
| $7.33M | 0.01% |
+161,806
| New | +$6.99M |
|
|
HOLX
971
CALL
DELISTED
Hologic
HOLX
| $7.31M | 0.01% |
95,500
-900
| -0.9% | -$66.2K |
|
972
CALL
AB InBev
BUD
$155B
| $7.3M | 0.01% |
120,500
+17,800
| +17% | +$1.04M |
|
973
CALL
Avantor
AVTR
$7.75B
| $7.29M | 0.01% |
173,000
+96,700
| +127% | +$3.81M |
|
974
PUT
Virgin Galactic
SPCE
$332M
| $7.28M | 0.01% |
27,215
-5,535
| -17% | -$2M |
|
975
CALL
Shake Shack
SHAK
$2.26B
| $7.27M | 0.01% |
100,800
+3,100
| +3% | +$236K |
|
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.