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 | |
|---|---|---|---|---|---|---|
|
TTAN
2876
CALL
ServiceTitan Inc
TTAN
$6.72B
| $966K | ﹤0.01% |
+9,400
| New | +$981K |
|
2877
AerCap
AER
$23.9B
| $964K | ﹤0.01% |
+10,081
| New | +$967K |
|
|
GRRR
2878
Gorilla Technology Group
GRRR
$333M
| $962K | ﹤0.01% |
+53,299
| New | +$350K |
|
2879
NexGen Energy
NXE
$6.05B
| $961K | ﹤0.01% |
145,687
-154,289
| -51% | -$1.16M |
|
2880
CALL
TMC The Metals Company
TMC
$1.59B
| $961K | ﹤0.01% |
858,500
+57,700
| +7% | +$54.4K |
|
2881
PUT
Community Health Systems
CYH
$385M
| $958K | ﹤0.01% |
320,500
-194,000
| -38% | -$815K |
|
2882
PUT
Public Storage
PSA
$60.2B
| $958K | ﹤0.01% |
3,200
-15,100
| -83% | -$5.01M |
|
2883
PUT
Sibanye-Stillwater
SBSW
$5.92B
| $957K | ﹤0.01% |
290,000
-93,400
| -24% | -$393K |
|
2884
Visa
V
$677B
| $956K | ﹤0.01% |
3,027
-63,183
| -95% | -$19M |
|
|
SKX
2885
DELISTED
Skechers
SKX
| $955K | ﹤0.01% |
14,203
-20,840
| -59% | -$1.35M |
|
2886
PUT
Warrior Met Coal
HCC
$4.23B
| $954K | ﹤0.01% |
17,600
-24,800
| -58% | -$1.58M |
|
2887
Marriott International
MAR
$98.7B
| $954K | ﹤0.01% |
+3,421
| New | +$939K |
|
2888
Clover Health Investments
CLOV
$2.28B
| $953K | ﹤0.01% |
302,669
+242,810
| +406% | +$868K |
|
2889
AGNC Investment
AGNC
$12.3B
| $952K | ﹤0.01% |
+103,398
| New | +$1.01M |
|
2890
CALL
Dolby
DLB
$4.72B
| $952K | ﹤0.01% |
+12,200
| New | +$929K |
|
2891
CALL
Schrodinger
SDGR
$1.12B
| $952K | ﹤0.01% |
49,400
+16,000
| +48% | +$311K |
|
2892
Vestis
VSTS
$2.06B
| $950K | ﹤0.01% |
62,336
-2,004
| -3% | -$30.2K |
|
2893
PUT
Hooker Furnishings Corp
HOFT
$148M
| $949K | ﹤0.01% |
67,800
+67,700
| +67,700% | +$1.14M |
|
2894
CALL
Inogen
INGN
$167M
| $949K | ﹤0.01% |
103,500
-18,200
| -15% | -$170K |
|
2895
CALL
Limbach Holdings
LMB
$867M
| $949K | ﹤0.01% |
11,100
+1,600
| +17% | +$141K |
|
2896
PUT
Biohaven
BHVN
$2.16B
| $948K | ﹤0.01% |
25,400
-13,200
| -34% | -$616K |
|
2897
Illumina
ILMN
$29.4B
| $948K | ﹤0.01% |
+7,095
| New | +$1.01M |
|
|
TEN
2898
CALL
Tsakos Energy Navigation Ltd
TEN
$1.19B
| $948K | ﹤0.01% |
54,700
-23,400
| -30% | -$488K |
|
2899
ProShares Ultra Silver
AGQ
$1.16B
| $947K | ﹤0.01% |
28,155
+18,954
| +206% | +$765K |
|
2900
CALL
Watsco Inc
WSO
$14.9B
| $947K | ﹤0.01% |
2,000
-19,800
| -91% | -$10M |
|
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.