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 | |
|---|---|---|---|---|---|---|
2901
Funko
FNKO
$323M
| $945K | ﹤0.01% |
+70,627
| New | +$830K |
|
2902
PUT
Magna International
MGA
$17.9B
| $944K | ﹤0.01% |
22,600
-34,500
| -60% | -$1.48M |
|
2903
Parker-Hannifin
PH
$125B
| $943K | ﹤0.01% |
1,483
-42
| -3% | -$27.8K |
|
2904
CALL
FT Vest Gold Strategy Target Income ETF
IGLD
$507M
| $940K | ﹤0.01% |
5,400
-500
| -8% | -$10.4K |
|
2905
Vipshop
VIPS
$6.84B
| $938K | ﹤0.01% |
69,680
-80,753
| -54% | -$1.16M |
|
|
JOYY
2906
JOYY Inc
JOYY
$3.73B
| $938K | ﹤0.01% |
+22,429
| New | +$824K |
|
2907
Accenture
ACN
$89.9B
| $937K | ﹤0.01% |
+2,665
| New | +$959K |
|
2908
CALL
Aramark
ARMK
$15B
| $936K | ﹤0.01% |
25,100
-46,900
| -65% | -$1.82M |
|
2909
CALL
Blue Bird Corp
BLBD
$2.41B
| $934K | ﹤0.01% |
24,200
+20,500
| +554% | +$856K |
|
|
BBBY
2910
CALL
Bed Bath & Beyond
BBBY
$473M
| $934K | ﹤0.01% |
208,450
-2,200
| -1% | -$14K |
|
2911
PUT
iHeartMedia
IHRT
$535M
| $934K | ﹤0.01% |
472,000
+420,400
| +815% | +$890K |
|
|
CKPT
2912
CALL
DELISTED
Checkpoint Therapeutics
CKPT
| $932K | ﹤0.01% |
291,500
+160,100
| +122% | +$543K |
|
2913
CALL
Frontline
FRO
$8.75B
| $932K | ﹤0.01% |
65,700
+6,600
| +11% | +$124K |
|
2914
CALL
GCM Grosvenor
GCMG
$737M
| $928K | ﹤0.01% |
+75,700
| New | +$899K |
|
2915
PUT
Huazhu Hotels Group
HTHT
$12.4B
| $928K | ﹤0.01% |
28,100
-7,100
| -20% | -$257K |
|
2916
PUT
Star Bulk Carriers
SBLK
$3.14B
| $928K | ﹤0.01% |
62,100
-321,600
| -84% | -$5.98M |
|
2917
CALL
Group 1 Automotive
GPI
$3.94B
| $927K | ﹤0.01% |
2,200
+1,100
| +100% | +$435K |
|
2918
InMode
INMD
$872M
| $927K | ﹤0.01% |
55,533
-34,546
| -38% | -$613K |
|
2919
PUT
Dorian LPG
LPG
$1.94B
| $926K | ﹤0.01% |
38,000
+1,500
| +4% | +$42K |
|
2920
TeraWulf
WULF
$9.15B
| $924K | ﹤0.01% |
163,367
-89,122
| -35% | -$575K |
|
2921
CALL
AnaptysBio
ANAB
$1.6B
| $922K | ﹤0.01% |
69,700
+63,800
| +1,081% | +$1.55M |
|
2922
CALL
Icon
ICLR
$12.8B
| $922K | ﹤0.01% |
4,400
-11,800
| -73% | -$2.76M |
|
2923
CALL
Skywest
SKYW
$4.11B
| $921K | ﹤0.01% |
9,200
+6,700
| +268% | +$684K |
|
2924
CALL
Cincinnati Financial
CINF
$28.3B
| $919K | ﹤0.01% |
6,400
-3,400
| -35% | -$496K |
|
|
CGC
2925
PUT
Canopy Growth
CGC
$375M
| $918K | ﹤0.01% |
335,200
-174,800
| -34% | -$694K |
|
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.