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 | |
|---|---|---|---|---|---|---|
3851
CALL
Grindr
GRND
$2.95B
| $369K | ﹤0.01% |
20,700
-16,000
| -44% | -$233K |
|
3852
CALL
Kosmos Energy
KOS
$1.39B
| $369K | ﹤0.01% |
108,100
+2,200
| +2% | +$8.37K |
|
|
SFIX
3853
Stitch Fix
SFIX
$563M
| $369K | ﹤0.01% |
85,693
+44,688
| +109% | +$165K |
|
3854
PUT
Cogent Biosciences
COGT
$6.95B
| $367K | ﹤0.01% |
47,100
-1,000
| -2% | -$9.97K |
|
3855
PUT
Cooper Companies
COO
$14.1B
| $367K | ﹤0.01% |
4,000
-46,000
| -92% | -$4.69M |
|
3856
Entergy
ETR
$52.4B
| $365K | ﹤0.01% |
+4,822
| New | +$348K |
|
3857
Invesco KBW Bank ETF
KBWB
$6.9B
| $365K | ﹤0.01% |
5,590
+5,554
| +15,428% | +$363K |
|
3858
O-I Glass
OI
$1.39B
| $365K | ﹤0.01% |
33,708
-28,664
| -46% | -$348K |
|
3859
PUT
Vanguard Total International Stock ETF
VXUS
$153B
| $365K | ﹤0.01% |
6,200
-3,700
| -37% | -$229K |
|
3860
CALL
ProShares UltraShort Industrials
SIJ
$5.73M
| $364K | ﹤0.01% |
2,925
-2,675
| -48% | -$83.6K |
|
3861
PUT
Blue Bird Corp
BLBD
$2.34B
| $363K | ﹤0.01% |
9,400
+700
| +8% | +$29.2K |
|
|
3862
Cogent Biosciences
COGT
$6.95B
| $363K | ﹤0.01% |
+46,610
| New | +$465K |
|
3863
Velocity Financial
VEL
$698M
| $363K | ﹤0.01% |
+18,568
| New | +$369K |
|
3864
CALL
Hess Midstream
HESM
$5.13B
| $362K | ﹤0.01% |
9,800
-12,700
| -56% | -$457K |
|
|
JMIA
3865
PUT
Jumia Technologies
JMIA
$741M
| $362K | ﹤0.01% |
95,000
+5,400
| +6% | +$24.2K |
|
3866
CALL
Broadridge
BR
$18.3B
| $361K | ﹤0.01% |
1,600
-500
| -24% | -$112K |
|
|
CRESY
3867
PUT
Cresud
CRESY
$808M
| $361K | ﹤0.01% |
28,842
+14,118
| +96% | +$154K |
|
|
OPRA
3868
PUT
Opera Ltd
OPRA
$1.71B
| $361K | ﹤0.01% |
19,100
-48,100
| -72% | -$858K |
|
3869
CALL
XP
XP
$8.68B
| $361K | ﹤0.01% |
30,500
-24,400
| -44% | -$384K |
|
3870
AstraZeneca
AZN
$267B
| $360K | ﹤0.01% |
2,754
-12,892
| -82% | -$1.8M |
|
3871
PUT
Badger Meter
BMI
$3.9B
| $360K | ﹤0.01% |
+1,700
| New | +$370K |
|
3872
CALL
Clearway Energy Class C
CWEN
$4.9B
| $360K | ﹤0.01% |
13,900
+8,100
| +140% | +$224K |
|
3873
Listed Funds Trust Roundhill Magnificent Seven ETF
MAGS
$3.83B
| $360K | ﹤0.01% |
6,628
+2,564
| +63% | +$132K |
|
3874
CALL
Terex
TEX
$7.84B
| $360K | ﹤0.01% |
7,800
+1,200
| +18% | +$62.6K |
|
3875
PUT
Extreme Networks
EXTR
$3.92B
| $359K | ﹤0.01% |
21,500
+1,000
| +5% | +$16.2K |
|
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.