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 |
Microsoft
MSFT
|
+$53.9M |
| 2 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$52.9M |
| 3 |
NVIDIA
NVDA
|
+$47.1M |
| 4 |
PayPal
PYPL
|
+$41.7M |
| 5 |
Alphabet (Google) Class C
GOOG
|
+$28.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$51.4M |
| 2 |
Walmart Inc
WMT
|
+$46.4M |
| 3 |
VanEck Oil Services ETF
OIH
|
+$34.2M |
| 4 |
Adobe
ADBE
|
+$33.5M |
| 5 |
Starbucks
SBUX
|
+$26.8M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.41% |
| 2 | Healthcare | 0.21% |
| 3 | Consumer Discretionary | 0.21% |
| 4 | Communication Services | 0.2% |
| 5 | Financials | 0.15% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
3551
PUT
Levi Strauss
LEVI
$9.73B
| $395K | ﹤0.01% |
27,400
-4,800
| -15% | -$69.3K |
|
3552
Boston Beer
SAM
$1.94B
| $395K | ﹤0.01% |
+1,283
| New | +$413K |
|
3553
PUT
Sotera Health
SHC
$4.98B
| $395K | ﹤0.01% |
21,000
+6,100
| +41% | +$96.9K |
|
3554
Getty Images
GETY
$170M
| $394K | ﹤0.01% |
80,772
-32,186
| -28% | -$184K |
|
3555
CALL
Ameresco
AMRC
$1.05B
| $393K | ﹤0.01% |
8,100
-3,500
| -30% | -$158K |
|
|
KYNB
3556
PUT
Kyntra Bio
KYNB
$28.5M
| $393K | ﹤0.01% |
5,828
+5,344
| +1,104% | +$2.21M |
|
3557
Invesco Solar ETF
TAN
$1.41B
| $393K | ﹤0.01% |
5,510
-11,943
| -68% | -$862K |
|
|
AMRS
3558
CALL
DELISTED
Amyris Inc.
AMRS
| $393K | ﹤0.01% |
381,600
-1,200
| -0.3% | -$1.12K |
|
3559
CALL
Haleon
HLN
$45.2B
| $392K | ﹤0.01% |
46,800
+6,300
| +16% | +$53.8K |
|
3560
PUT
Magnolia Oil & Gas
MGY
$5.58B
| $392K | ﹤0.01% |
18,800
+1,400
| +8% | +$29K |
|
3561
CALL
Appian
APPN
$2.02B
| $390K | ﹤0.01% |
8,200
+6,100
| +290% | +$257K |
|
3562
PUT
Masco
MAS
$16.5B
| $390K | ﹤0.01% |
6,800
-58,300
| -90% | -$3.05M |
|
3563
Freshpet
FRPT
$3.02B
| $389K | ﹤0.01% |
+5,918
| New | +$388K |
|
|
TRUE
3564
PUT
DELISTED
TrueCar
TRUE
| $389K | ﹤0.01% |
172,400
-410,600
| -70% | -$978K |
|
3565
Immunovant
IMVT
$7.94B
| $388K | ﹤0.01% |
20,506
+4,652
| +29% | +$86.8K |
|
3566
WisdomTree Japan Hedged Equity Fund
DXJ
$7.11B
| $386K | ﹤0.01% |
+4,643
| New | +$353K |
|
3567
PUT
Kayne Anderson Energy Infrastructure Fund
KYN
$2.42B
| $386K | ﹤0.01% |
47,500
+9,600
| +25% | +$79.1K |
|
|
VSXY
3568
PUT
Victoria's Secret
VSXY
$7.09B
| $386K | ﹤0.01% |
22,200
-6,100
| -22% | -$154K |
|
3569
CALL
Metallus
MTUS
$883M
| $386K | ﹤0.01% |
17,900
+14,700
| +459% | +$266K |
|
|
NETI
3570
CALL
DELISTED
Eneti Inc.
NETI
| $386K | ﹤0.01% |
31,900
+18,200
| +133% | +$177K |
|
3571
CALL
ARKO Corp
ARKO
$904M
| $385K | ﹤0.01% |
48,500
-7,200
| -13% | -$57.3K |
|
3572
Flywire
FLYW
$2.03B
| $385K | ﹤0.01% |
+12,405
| New | +$372K |
|
3573
Repligen
RGEN
$8.39B
| $385K | ﹤0.01% |
+2,726
| New | +$437K |
|
3574
PUT
Textron
TXT
$15.8B
| $385K | ﹤0.01% |
5,700
+1,700
| +43% | +$112K |
|
3575
CALL
Medpace
MEDP
$16.1B
| $384K | ﹤0.01% |
1,600
+1,500
| +1,500% | +$312K |
|
Similar funds
Simplex Trading's Q2 2023 Portfolio in Review
As of Q2 2023, Simplex Trading held 10,535 positions worth $122B, up 6.9% from $114B the previous quarter. Its ten largest holdings account for 43% of the portfolio.
Simplex Trading's Q2 2023 filing shows 1,474 new, 3,350 increased, 3,913 reduced and 1,517 closed positions. Its largest new stake was Microsoft: 171,935 shares worth $58.5M. The largest sale was Apple, an estimated $51.4M.
By sector, the portfolio is most concentrated in Technology at 0.41% of assets, down from 0.42% a quarter earlier, followed by Healthcare and Consumer Discretionary.
- Simplex Trading's largest Q2 2023 buy was Microsoft: 171,935 shares worth $58.5M.
- Simplex Trading added most to iShares 20+ Year Treasury Bond ETF in Q2 2023, an estimated $52.9M increase.
- Simplex Trading's biggest Q2 2023 reduction was Adobe, cutting an estimated $33.5M.
- Simplex Trading fully exited Apple in Q2 2023, selling an estimated $51.4M.
- Simplex Trading's ten largest holdings make up 43% of its $122B portfolio in Q2 2023.
- Simplex Trading opened 1,474 new positions and closed 1,517 in Q2 2023.
- Simplex Trading's portfolio value rose 6.9% quarter-over-quarter to $122B.
Based on Simplex Trading's 13F filing for Q2 2023, filed 4 Aug 2023.