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 | |
|---|---|---|---|---|---|---|
|
VRN
2876
CALL
DELISTED
Veren
VRN
| $756K | ﹤0.01% |
112,400
-58,400
| -34% | -$407K |
|
2877
Archer Daniels Midland
ADM
$40B
| $753K | ﹤0.01% |
+9,974
| New | +$755K |
|
2878
PUT
CAVA Group
CAVA
$7.45B
| $753K | ﹤0.01% |
+18,400
| New | +$757K |
|
2879
Huntsman Corp
HUN
$2.08B
| $753K | ﹤0.01% |
+27,883
| New | +$724K |
|
2880
PUT
Box
BOX
$4.23B
| $752K | ﹤0.01% |
25,600
+16,900
| +194% | +$468K |
|
2881
Iridium Communications
IRDM
$4.83B
| $751K | ﹤0.01% |
12,105
+8,077
| +201% | +$500K |
|
2882
PUT
AGCO
AGCO
$8.6B
| $749K | ﹤0.01% |
5,700
+1,700
| +43% | +$211K |
|
2883
PUT
Jacobs Solutions
J
$15.9B
| $749K | ﹤0.01% |
7,617
+6,408
| +530% | +$611K |
|
2884
PUT
Penske Automotive Group
PAG
$14.2B
| $749K | ﹤0.01% |
4,500
-39,200
| -90% | -$5.69M |
|
2885
PUT
Ciena
CIEN
$52.2B
| $747K | ﹤0.01% |
17,600
-41,700
| -70% | -$1.9M |
|
2886
Direxion Daily TSLA Bull 2X ETF
TSLL
$2.37B
| $747K | ﹤0.01% |
43,052
+4,358
| +11% | +$52.2K |
|
2887
CALL
Vera Bradley
VRA
$107M
| $746K | ﹤0.01% |
116,900
+114,000
| +3,931% | +$643K |
|
2888
CALL
Sabre
SABR
$704M
| $745K | ﹤0.01% |
233,800
-86,400
| -27% | -$312K |
|
2889
CALL
Verisk Analytics
VRSK
$27.2B
| $745K | ﹤0.01% |
3,300
+3,200
| +3,200% | +$672K |
|
|
NTCO
2890
CALL
DELISTED
Natura &Co Holding S.A. American Depositary Shares (each representing two Common Shares)
NTCO
| $745K | ﹤0.01% |
+106,900
| New | +$581K |
|
2891
CALL
AST SpaceMobile
ASTS
$16.9B
| $744K | ﹤0.01% |
158,400
-78,500
| -33% | -$407K |
|
2892
PUT
Howmet Aerospace
HWM
$114B
| $743K | ﹤0.01% |
15,000
-1,500
| -9% | -$66.8K |
|
2893
CALL
Owens Corning
OC
$11.5B
| $743K | ﹤0.01% |
5,700
+2,700
| +90% | +$296K |
|
2894
Lightspeed Commerce
LSPD
$1.35B
| $741K | ﹤0.01% |
43,799
-12,559
| -22% | -$181K |
|
2895
CALL
Westlake Corp
WLK
$9.35B
| $740K | ﹤0.01% |
6,200
+3,500
| +130% | +$400K |
|
2896
PUT
Zai Lab
ZLAB
$2.11B
| $740K | ﹤0.01% |
26,700
+26,400
| +8,800% | +$864K |
|
2897
CALL
Ameris Bancorp
ABCB
$5.79B
| $738K | ﹤0.01% |
21,600
| – | – |
|
2898
CALL
Kimco Realty
KIM
$17.9B
| $737K | ﹤0.01% |
37,400
+4,000
| +12% | +$75.4K |
|
2899
PUT
GDS Holdings
GDS
$6.22B
| $736K | ﹤0.01% |
67,000
-93,100
| -58% | -$1.24M |
|
2900
PUT
New York Times
NYT
$11.8B
| $736K | ﹤0.01% |
18,700
+11,500
| +160% | +$437K |
|
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.