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 |
Apple
AAPL
|
+$552M |
| 2 |
Strategy Inc
MSTR
|
+$85.8M |
| 3 |
MSTX
Defiance Daily Target 2x Long MSTR ETF
MSTX
|
+$48.1M |
| 4 |
Intel
INTC
|
+$45.4M |
| 5 |
Uber
UBER
|
+$43M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
NVIDIA
NVDA
|
+$133M |
| 2 |
Pinduoduo
PDD
|
+$82.6M |
| 3 |
Boeing
BA
|
+$49.8M |
| 4 |
KraneShares CSI China Internet ETF
KWEB
|
+$45.1M |
| 5 |
Microsoft
MSFT
|
+$41M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.68% |
| 2 | Consumer Discretionary | 0.23% |
| 3 | Healthcare | 0.19% |
| 4 | Financials | 0.13% |
| 5 | Communication Services | 0.11% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
3951
BJ's Restaurants
BJRI
$1.45B
| $334K | ﹤0.01% |
9,530
+6,525
| +217% | +$231K |
|
3952
B2Gold
BTG
$5.12B
| $334K | ﹤0.01% |
137,030
-277,687
| -67% | -$815K |
|
|
JKS
3953
JinkoSolar
JKS
$782M
| $334K | ﹤0.01% |
13,447
-28,169
| -68% | -$688K |
|
3954
PUT
Seadrill
SDRL
$2.56B
| $334K | ﹤0.01% |
8,600
-13,600
| -61% | -$527K |
|
3955
Bitdeer Technologies
BTDR
$2.5B
| $333K | ﹤0.01% |
+15,396
| New | +$196K |
|
3956
Rocket Lab Corp
RKLB
$39.9B
| $333K | ﹤0.01% |
13,108
-28,723
| -69% | -$504K |
|
3957
CALL
Ryan Specialty Holdings
RYAN
$5.96B
| $333K | ﹤0.01% |
5,200
+600
| +13% | +$41.8K |
|
3958
PUT
Varonis Systems
VRNS
$5.13B
| $333K | ﹤0.01% |
7,500
-10,800
| -59% | -$562K |
|
3959
CALL
Adient
ADNT
$1.7B
| $332K | ﹤0.01% |
19,300
+18,300
| +1,830% | +$366K |
|
3960
PUT
Medpace
MEDP
$15.9B
| $332K | ﹤0.01% |
1,000
-4,600
| -82% | -$1.56M |
|
3961
PUT
Oshkosh
OSK
$9.51B
| $332K | ﹤0.01% |
3,500
+300
| +9% | +$31.4K |
|
3962
CALL
Protolabs
PRLB
$1.78B
| $332K | ﹤0.01% |
8,500
+1,700
| +25% | +$61.1K |
|
3963
CALL
Achieve Life Sciences
ACHV
$634M
| $331K | ﹤0.01% |
94,100
-4,300
| -4% | -$19.5K |
|
3964
CALL
Equifax
EFX
$22B
| $331K | ﹤0.01% |
1,300
-16,100
| -93% | -$4.31M |
|
3965
PUT
OppFi
OPFI
$824M
| $331K | ﹤0.01% |
43,300
-90,800
| -68% | -$573K |
|
3966
PUT
Progyny
PGNY
$2.41B
| $331K | ﹤0.01% |
19,200
-8,100
| -30% | -$126K |
|
3967
PUT
Western Union
WU
$2.58B
| $331K | ﹤0.01% |
31,300
-114,600
| -79% | -$1.27M |
|
3968
PUT
Brookfield Asset Management
BAM
$76.7B
| $330K | ﹤0.01% |
6,100
-16,300
| -73% | -$880K |
|
3969
PUT
POET Technologies
POET
$1.17B
| $330K | ﹤0.01% |
55,600
+12,400
| +29% | +$55K |
|
3970
SM Energy
SM
$7.11B
| $330K | ﹤0.01% |
+8,533
| New | +$360K |
|
3971
LendingTree
TREE
$572M
| $330K | ﹤0.01% |
8,527
+7,707
| +940% | +$369K |
|
3972
PUT
Biomea Fusion
BMEA
$90.4M
| $329K | ﹤0.01% |
84,800
+77,000
| +987% | +$614K |
|
3973
CALL
Dorchester Minerals
DMLP
$1.3B
| $329K | ﹤0.01% |
9,900
+9,200
| +1,314% | +$300K |
|
|
EXK
3974
Endeavour Silver
EXK
$2.29B
| $329K | ﹤0.01% |
89,965
+9,560
| +12% | +$42.2K |
|
3975
CALL
Boston Beer
SAM
$1.93B
| $329K | ﹤0.01% |
1,100
-1,300
| -54% | -$392K |
|
Similar funds
Simplex Trading's Q4 2024 Portfolio in Review
As of Q4 2024, Simplex Trading held 10,008 positions worth $179B, up 4.8% from $170B the previous quarter. Its ten largest holdings account for 49% of the portfolio.
Simplex Trading's Q4 2024 filing shows 1,520 new, 3,222 increased, 3,616 reduced and 1,504 closed positions. Its largest new stake was Strategy Inc: 285,022 shares worth $82.5M. The largest sale was NVIDIA, an estimated $133M.
By sector, the portfolio is most concentrated in Technology at 0.68% of assets, up from 0.4% a quarter earlier, followed by Consumer Discretionary and Healthcare.
- Simplex Trading's largest Q4 2024 buy was Strategy Inc: 285,022 shares worth $82.5M.
- Simplex Trading added most to Apple in Q4 2024, an estimated $552M increase.
- Simplex Trading's biggest Q4 2024 reduction was NVIDIA, cutting an estimated $133M.
- Simplex Trading fully exited Pinduoduo in Q4 2024, selling an estimated $82.6M.
- Simplex Trading's ten largest holdings make up 49% of its $179B portfolio in Q4 2024.
- Simplex Trading opened 1,520 new positions and closed 1,504 in Q4 2024.
- Simplex Trading's portfolio value rose 4.8% quarter-over-quarter to $179B.
Based on Simplex Trading's 13F filing for Q4 2024, filed 11 Feb 2025.