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 | |
|---|---|---|---|---|---|---|
3501
CALL
Worthington Enterprises
WOR
$2.86B
| $416K | ﹤0.01% |
9,732
+3,082
| +46% | +$114K |
|
|
EH
3502
PUT
EHang Holdings
EH
$404M
| $415K | ﹤0.01% |
27,400
-66,600
| -71% | -$771K |
|
3503
CALL
Frontline
FRO
$8.66B
| $415K | ﹤0.01% |
28,600
-138,500
| -83% | -$2.07M |
|
3504
PUT
Pembina Pipeline
PBA
$29B
| $415K | ﹤0.01% |
13,200
+1,400
| +12% | +$44.7K |
|
3505
CALL
Root
ROOT
$959M
| $415K | ﹤0.01% |
46,500
+14,300
| +44% | +$79.1K |
|
3506
CALL
WD-40
WDFC
$3.14B
| $415K | ﹤0.01% |
2,200
-8,500
| -79% | -$1.61M |
|
|
CNH
3507
CALL
CNH Industrial
CNH
$14.1B
| $414K | ﹤0.01% |
28,800
-60,300
| -68% | -$847K |
|
|
RVNC
3508
DELISTED
Revance Therapeutics, Inc.
RVNC
| $414K | ﹤0.01% |
16,365
+784
| +5% | +$24.4K |
|
|
MOMO
3509
PUT
Hello Group
MOMO
$869M
| $413K | ﹤0.01% |
43,000
+12,300
| +40% | +$108K |
|
3510
Direxion Daily MSCI Brazil Bull 2X ETF
BRZU
$103M
| $412K | ﹤0.01% |
4,612
-9,250
| -67% | -$692K |
|
3511
CALL
Baytex Energy
BTE
$2.85B
| $412K | ﹤0.01% |
+126,500
| New | +$443K |
|
3512
PUT
Rocket Lab Corp
RKLB
$40.2B
| $412K | ﹤0.01% |
68,800
+5,200
| +8% | +$23.9K |
|
3513
CALL
RPM International
RPM
$14.2B
| $412K | ﹤0.01% |
4,600
+3,400
| +283% | +$279K |
|
|
RVNC
3514
PUT
DELISTED
Revance Therapeutics, Inc.
RVNC
| $412K | ﹤0.01% |
16,300
+1,100
| +7% | +$34.3K |
|
3515
CALL
Teledyne Technologies
TDY
$29.9B
| $411K | ﹤0.01% |
1,000
-3,300
| -77% | -$1.36M |
|
3516
CALL
Cytek Biosciences
CTKB
$585M
| $410K | ﹤0.01% |
48,100
+10,100
| +27% | +$90.6K |
|
3517
CALL
Hormel Foods
HRL
$14.2B
| $410K | ﹤0.01% |
10,200
-12,100
| -54% | -$485K |
|
3518
Credit Acceptance
CACC
$5.86B
| $409K | ﹤0.01% |
807
+757
| +1,514% | +$354K |
|
3519
EnerSys
ENS
$6.68B
| $409K | ﹤0.01% |
+3,770
| New | +$344K |
|
|
NOTV
3520
CALL
DELISTED
Inotiv
NOTV
| $409K | ﹤0.01% |
85,900
+52,600
| +158% | +$291K |
|
3521
LoveSac
LOVE
$251M
| $408K | ﹤0.01% |
+15,156
| New | +$387K |
|
|
AZUL
3522
DELISTED
Azul
AZUL
| $407K | ﹤0.01% |
+29,771
| New | +$271K |
|
3523
Fulgent Genetics
FLGT
$561M
| $407K | ﹤0.01% |
10,996
+8,531
| +346% | +$297K |
|
3524
PUT
Twist Bioscience
TWST
$5.46B
| $407K | ﹤0.01% |
19,900
+15,700
| +374% | +$235K |
|
3525
PUT
FS KKR Capital
FSK
$3.06B
| $406K | ﹤0.01% |
21,200
+12,800
| +152% | +$242K |
|
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.