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 |
NVIDIA
NVDA
|
+$93M |
| 2 |
Citigroup
C
|
+$74.8M |
| 3 |
Pinduoduo
PDD
|
+$50.7M |
| 4 |
Intel
INTC
|
+$47.1M |
| 5 |
Broadcom
AVGO
|
+$46.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street Energy Select Sector SPDR ETF
XLE
|
+$94.5M |
| 2 |
Pfizer
PFE
|
+$66.4M |
| 3 |
Boeing
BA
|
+$61.6M |
| 4 |
PayPal
PYPL
|
+$42.2M |
| 5 |
GE Aerospace
GE
|
+$42M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.53% |
| 2 | Consumer Discretionary | 0.29% |
| 3 | Healthcare | 0.21% |
| 4 | Financials | 0.2% |
| 5 | Materials | 0.12% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
3701
PUT
Vitesse Energy
VTS
$626M
| $488K | ﹤0.01% |
20,600
+7,600
| +58% | +$181K |
|
|
TUZ
3702
CALL
DELISTED
PIMCO 1-3 Year U.S. Treasury Index Exchange-Traded Fund
TUZ
| $488K | ﹤0.01% |
8,500
+5,900
| +227% | +$339K |
|
|
AZEK
3703
DELISTED
The AZEK Co
AZEK
| $487K | ﹤0.01% |
+11,573
| New | +$536K |
|
3704
iShares Mortgage Real Estate ETF
REM
$553M
| $487K | ﹤0.01% |
21,986
+15,688
| +249% | +$350K |
|
3705
PUT
Teucrium Agricultural Fund
TAGS
$19.3M
| $487K | ﹤0.01% |
79,900
+35,000
| +78% | +$975K |
|
3706
FIVE9
FIVN
$2.08B
| $486K | ﹤0.01% |
+11,037
| New | +$573K |
|
3707
CALL
Velocity Financial
VEL
$698M
| $485K | ﹤0.01% |
27,100
+22,700
| +516% | +$400K |
|
3708
PUT
Verisk Analytics
VRSK
$27.8B
| $485K | ﹤0.01% |
1,800
+800
| +80% | +$196K |
|
3709
PUT
Acadia Pharmaceuticals
ACAD
$4.45B
| $484K | ﹤0.01% |
29,800
-123,400
| -81% | -$1.99M |
|
3710
CALL
Allegion
ALLE
$13.7B
| $484K | ﹤0.01% |
4,100
-18,300
| -82% | -$2.25M |
|
3711
CALL
Burford Capital
BUR
$955M
| $484K | ﹤0.01% |
37,100
-98,600
| -73% | -$1.45M |
|
3712
Sprout Social
SPT
$522M
| $484K | ﹤0.01% |
+13,575
| New | +$546K |
|
3713
PUT
Atmus Filtration Technologies
ATMU
$4.45B
| $483K | ﹤0.01% |
16,800
-380,100
| -96% | -$11.5M |
|
3714
PUT
Playtika
PLTK
$1.51B
| $483K | ﹤0.01% |
61,400
+47,800
| +351% | +$379K |
|
3715
PUT
RPC Inc
RES
$1.14B
| $483K | ﹤0.01% |
77,300
-16,700
| -18% | -$117K |
|
3716
CALL
Rollins
ROL
$18.8B
| $483K | ﹤0.01% |
9,900
+3,300
| +50% | +$152K |
|
3717
CALL
Terex
TEX
$7.84B
| $482K | ﹤0.01% |
8,800
-7,200
| -45% | -$427K |
|
3718
Vanguard High Dividend Yield ETF
VYM
$81.9B
| $482K | ﹤0.01% |
4,067
-2,273
| -36% | -$270K |
|
3719
PUT
Vanguard Emerging Markets Government Bond ETF
VWOB
$6.17B
| $480K | ﹤0.01% |
4,100
+1,200
| +41% | +$75.7K |
|
3720
State Street Materials Select Sector SPDR ETF
XLB
$8.82B
| $480K | ﹤0.01% |
+10,878
| New | +$492K |
|
3721
CALL
Atmos Energy
ATO
$29.9B
| $478K | ﹤0.01% |
4,100
+3,200
| +356% | +$373K |
|
3722
Harrow
HROW
$1.47B
| $478K | ﹤0.01% |
+22,916
| New | +$343K |
|
|
CAN
3723
CALL
Canaan Creative
CAN
$178M
| $477K | ﹤0.01% |
477,400
-130,600
| -21% | -$138K |
|
|
HES
3724
DELISTED
Hess
HES
| $477K | ﹤0.01% |
3,235
-3,349
| -51% | -$513K |
|
3725
CALL
Cullinan Oncology
CGEM
$1.07B
| $476K | ﹤0.01% |
+27,300
| New | +$581K |
|
Similar funds
Simplex Trading's Q2 2024 Portfolio in Review
As of Q2 2024, Simplex Trading held 10,213 positions worth $162B, down 6.5% from $173B the previous quarter. Its ten largest holdings account for 50% of the portfolio.
Simplex Trading withdrew a net $19.2B in Q2 2024, closing 1,431 positions and reducing 4,061 holdings. Its most notable exit was Boeing, an estimated $61.6M position sold in full.
By sector, the portfolio is most concentrated in Technology at 0.53% of assets, up from 0.38% a quarter earlier, followed by Consumer Discretionary and Healthcare.
Against the trend, Simplex Trading opened a new position in Citigroup worth $77M.
- Simplex Trading's largest Q2 2024 buy was Citigroup: 1,213,247 shares worth $77M.
- Simplex Trading added most to NVIDIA in Q2 2024, an estimated $93M increase.
- Simplex Trading's biggest Q2 2024 reduction was State Street Energy Select Sector SPDR ETF, cutting an estimated $94.5M.
- Simplex Trading fully exited Boeing in Q2 2024, selling an estimated $61.6M.
- Simplex Trading's ten largest holdings make up 50% of its $162B portfolio in Q2 2024.
- Simplex Trading opened 1,358 new positions and closed 1,431 in Q2 2024.
- Simplex Trading's portfolio value fell 6.5% quarter-over-quarter to $162B.
Based on Simplex Trading's 13F filing for Q2 2024, filed 25 Jul 2024.