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 | |
|---|---|---|---|---|---|---|
|
SILV
3501
PUT
DELISTED
SilverCrest Metals Inc. Common Shares
SILV
| $582K | ﹤0.01% |
71,500
+35,900
| +101% | +$293K |
|
|
AKRO
3502
PUT
DELISTED
Akero Therapeutics
AKRO
| $581K | ﹤0.01% |
24,800
-14,300
| -37% | -$306K |
|
3503
PUT
Celldex Therapeutics
CLDX
$2.8B
| $581K | ﹤0.01% |
15,700
-42,800
| -73% | -$1.61M |
|
|
HAPN
3504
CALL
Happen Inc
HAPN
$2.16B
| $581K | ﹤0.01% |
68,700
-105,000
| -60% | -$898K |
|
3505
PUT
RUM Group Inc
RUM
$1.67B
| $581K | ﹤0.01% |
104,800
-90,100
| -46% | -$580K |
|
3506
CALL
Legend Biotech
LEGN
$3.73B
| $580K | ﹤0.01% |
13,100
-34,800
| -73% | -$1.61M |
|
3507
PUT
Waters Corp
WAT
$36.4B
| $580K | ﹤0.01% |
2,000
-15,400
| -89% | -$4.91M |
|
3508
CALL
Pacific Biosciences
PACB
$422M
| $579K | ﹤0.01% |
423,200
+295,600
| +232% | +$597K |
|
3509
CALL
Westlake Corp
WLK
$9.27B
| $579K | ﹤0.01% |
4,000
-1,500
| -27% | -$230K |
|
|
AMED
3510
PUT
DELISTED
Amedisys
AMED
| $578K | ﹤0.01% |
6,300
+500
| +9% | +$46.4K |
|
3511
PUT
Ouster
OUST
$2.36B
| $578K | ﹤0.01% |
58,900
+41,100
| +231% | +$416K |
|
|
BLD
3512
PUT
DELISTED
TopBuild
BLD
| $577K | ﹤0.01% |
1,500
-1,200
| -44% | -$489K |
|
3513
CALL
Harmony Gold Mining
HMY
$9.92B
| $577K | ﹤0.01% |
63,000
-8,400
| -12% | -$75.2K |
|
3514
PUT
SFL Corp
SFL
$1.59B
| $577K | ﹤0.01% |
41,600
-2,000
| -5% | -$27.1K |
|
3515
CALL
Aurinia Pharmaceuticals
AUPH
$1.96B
| $576K | ﹤0.01% |
100,900
-114,600
| -53% | -$604K |
|
3516
PUT
GFL Environmental
GFL
$14.1B
| $576K | ﹤0.01% |
14,800
+6,200
| +72% | +$212K |
|
|
NLOP
3517
CALL
Net Lease Office Properties
NLOP
$171M
| $576K | ﹤0.01% |
+23,400
| New | +$554K |
|
3518
dLocal
DLO
$4.4B
| $573K | ﹤0.01% |
+70,933
| New | +$833K |
|
3519
PUT
Getty Images
GETY
$173M
| $573K | ﹤0.01% |
175,800
-137,600
| -44% | -$514K |
|
3520
Axcelis
ACLS
$3.94B
| $571K | ﹤0.01% |
4,021
+1,634
| +68% | +$188K |
|
3521
CACI
CACI
$11B
| $571K | ﹤0.01% |
+1,328
| New | +$542K |
|
3522
CALL
Modine Manufacturing
MOD
$12.2B
| $571K | ﹤0.01% |
5,700
-39,200
| -87% | -$3.76M |
|
|
VTLE
3523
DELISTED
Vital Energy
VTLE
| $571K | ﹤0.01% |
12,743
-9,576
| -43% | -$477K |
|
3524
CALL
Adient
ADNT
$1.62B
| $570K | ﹤0.01% |
23,100
+9,100
| +65% | +$258K |
|
|
CWAN
3525
CALL
DELISTED
Clearwater Analytics
CWAN
| $570K | ﹤0.01% |
30,800
+20,000
| +185% | +$361K |
|
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.