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 | |
|---|---|---|---|---|---|---|
3026
CALL
LivePerson
LPSN
$18.9M
| $828K | ﹤0.01% |
36,320
+17,827
| +96% | +$273K |
|
3027
PUT
Opko Health
OPK
$921M
| $828K | ﹤0.01% |
563,400
-533,200
| -49% | -$815K |
|
3028
Quantum-Si Incorporated
QSI
$168M
| $828K | ﹤0.01% |
306,769
+280,270
| +1,058% | +$328K |
|
3029
BlackSky Technology
BKSY
$800M
| $826K | ﹤0.01% |
76,619
+63,143
| +469% | +$541K |
|
3030
CALL
Erie Indemnity
ERIE
$11.7B
| $824K | ﹤0.01% |
2,000
+1,900
| +1,900% | +$850K |
|
|
DESP
3031
CALL
DELISTED
Despegar.com
DESP
| $823K | ﹤0.01% |
42,800
+12,900
| +43% | +$203K |
|
3032
PUT
BuzzFeed
BZFD
$92.4M
| $822K | ﹤0.01% |
308,200
+23,500
| +8% | +$73.8K |
|
3033
PUT
FuboTV Inc
FUBO
$245M
| $822K | ﹤0.01% |
54,383
+8,458
| +18% | +$155K |
|
3034
CALL
PAR Technology
PAR
$637M
| $821K | ﹤0.01% |
11,300
-1,700
| -13% | -$116K |
|
|
HTGCR
3035
PUT
DELISTED
HERCULES TECHNOLOGY GROWTH CAP INC TRANS RGTS TO PUR COM STK
HTGCR
| $821K | ﹤0.01% |
40,900
-63,300
| -61% | -$1.27M |
|
3036
PUT
Braze
BRZE
$2.45B
| $820K | ﹤0.01% |
19,600
-5,100
| -21% | -$185K |
|
3037
Liberty Energy
LBRT
$2.83B
| $820K | ﹤0.01% |
+41,253
| New | +$763K |
|
3038
YieldMax Ultra Option Income Strategy ETF
ULTY
$775M
| $820K | ﹤0.01% |
9,142
+5,757
| +170% | +$575K |
|
|
LINE
3039
CALL
Lineage Inc
LINE
$9.43B
| $819K | ﹤0.01% |
14,000
-1,600
| -10% | -$109K |
|
|
AISP
3040
CALL
Airship AI Holdings
AISP
$69.2M
| $818K | ﹤0.01% |
130,700
+68,300
| +109% | +$201K |
|
3041
CALL
Blackstone Secured Lending
BXSL
$5.41B
| $817K | ﹤0.01% |
25,300
-55,000
| -68% | -$1.72M |
|
3042
CALL
Webster Financial
WBS
$12.3B
| $817K | ﹤0.01% |
14,800
-4,900
| -25% | -$269K |
|
3043
PUT
KULR Technology Group
KULR
$117M
| $816K | ﹤0.01% |
28,750
+26,937
| +1,486% | +$210K |
|
3044
CALL
Macerich
MAC
$7.32B
| $816K | ﹤0.01% |
41,000
-43,700
| -52% | -$853K |
|
3045
CALL
RLX Technology
RLX
$2.48B
| $815K | ﹤0.01% |
377,500
+252,300
| +202% | +$454K |
|
|
BABO
3046
CALL
YieldMax BABA Option Income Strategy ETF
BABO
$13.7M
| $815K | ﹤0.01% |
60,700
+59,700
| +5,970% | +$1.19M |
|
|
SAVE
3047
PUT
DELISTED
Spirit Airlines, Inc.
SAVE
| $815K | ﹤0.01% |
2,434,400
+480,700
| +25% | +$1.05M |
|
|
SERV
3048
PUT
Serve Robotics
SERV
$409M
| $814K | ﹤0.01% |
60,300
-33,700
| -36% | -$354K |
|
3049
CALL
Syndax Pharmaceuticals
SNDX
$1.84B
| $813K | ﹤0.01% |
61,500
+53,100
| +632% | +$909K |
|
3050
PUT
Viking Holdings
VIK
$44.9B
| $810K | ﹤0.01% |
18,400
-18,900
| -51% | -$802K |
|
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.