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 | |
|---|---|---|---|---|---|---|
3301
Black Stone Minerals
BSM
$3.17B
| $629K | ﹤0.01% |
43,124
-3,689
| -8% | -$55K |
|
3302
CALL
SLM Corp
SLM
$4.78B
| $628K | ﹤0.01% |
22,800
-50,000
| -69% | -$1.24M |
|
3303
CALL
Essex Property Trust
ESS
$18.7B
| $627K | ﹤0.01% |
2,200
+1,100
| +100% | +$325K |
|
|
OKLO
3304
Oklo
OKLO
$7.27B
| $624K | ﹤0.01% |
29,407
+24,266
| +472% | +$470K |
|
3305
CALL
Copa Holdings
CPA
$5.65B
| $623K | ﹤0.01% |
7,100
+3,200
| +82% | +$304K |
|
3306
PUT
iRhythm Holdings
IRTC
$3.69B
| $622K | ﹤0.01% |
6,900
-3,100
| -31% | -$244K |
|
3307
CALL
Hallador Energy
HNRG
$717M
| $621K | ﹤0.01% |
54,300
-29,600
| -35% | -$331K |
|
3308
CALL
PSQ Holdings
PSQH
$10.3M
| $621K | ﹤0.01% |
9,127
+5,007
| +122% | +$236K |
|
3309
CALL
Beyond Meat
BYND
$283M
| $620K | ﹤0.01% |
165,000
-230,100
| -58% | -$1.22M |
|
3310
Baxter International
BAX
$12.1B
| $619K | ﹤0.01% |
+21,250
| New | +$715K |
|
3311
PUT
Citizens
CIA
$248M
| $619K | ﹤0.01% |
154,400
+100,200
| +185% | +$451K |
|
3312
CALL
Mohawk Industries
MHK
$7.05B
| $619K | ﹤0.01% |
5,200
-4,100
| -44% | -$573K |
|
3313
Arista Networks
ANET
$215B
| $618K | ﹤0.01% |
5,596
+2,748
| +96% | +$283K |
|
3314
Rogers Corp
ROG
$2.31B
| $618K | ﹤0.01% |
6,087
+62
| +1% | +$6.46K |
|
3315
PUT
UWM Holdings
UWMC
$624M
| $618K | ﹤0.01% |
105,300
-1,900
| -2% | -$12.4K |
|
3316
Global X Lithium & Battery Tech ETF
LIT
$1.5B
| $617K | ﹤0.01% |
15,152
+14,963
| +7,917% | +$660K |
|
3317
PUT
MakeMyTrip
MMYT
$4.97B
| $617K | ﹤0.01% |
5,500
+1,200
| +28% | +$129K |
|
3318
CALL
Nabors Industries
NBR
$1.16B
| $617K | ﹤0.01% |
10,800
-4,600
| -30% | -$327K |
|
3319
PUT
Omeros
OMER
$821M
| $617K | ﹤0.01% |
62,500
+9,500
| +18% | +$65.2K |
|
3320
CALL
Axogen
AXGN
$2.19B
| $614K | ﹤0.01% |
37,300
-900
| -2% | -$12.7K |
|
3321
CALL
Valmont Industries
VMI
$9.61B
| $613K | ﹤0.01% |
2,000
+1,500
| +300% | +$483K |
|
3322
CALL
Frontier Group Holdings
ULCC
$1.4B
| $611K | ﹤0.01% |
86,000
+6,800
| +9% | +$42.4K |
|
3323
PUT
Qiagen
QGEN
$8.47B
| $610K | ﹤0.01% |
13,319
-47,834
| -78% | -$2.14M |
|
|
SGMO
3324
PUT
DELISTED
SANGAMO THERAPEUTICS INC
SGMO
| $610K | ﹤0.01% |
598,100
+370,200
| +162% | +$677K |
|
3325
CALL
CorMedix
CRMD
$596M
| $606K | ﹤0.01% |
74,900
+3,800
| +5% | +$38K |
|
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.