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 | |
|---|---|---|---|---|---|---|
3426
PUT
MINISO
MNSO
$3.76B
| $448K | ﹤0.01% |
26,400
+12,200
| +86% | +$204K |
|
3427
PUT
Cactus
WHD
$3.71B
| $448K | ﹤0.01% |
10,600
+9,000
| +563% | +$351K |
|
3428
PUT
Ameresco
AMRC
$1B
| $447K | ﹤0.01% |
9,200
+4,200
| +84% | +$189K |
|
3429
Old National Bancorp
ONB
$10.2B
| $447K | ﹤0.01% |
32,112
+3,820
| +14% | +$50.8K |
|
|
THS
3430
DELISTED
Treehouse Foods
THS
| $447K | ﹤0.01% |
8,877
+8,381
| +1,690% | +$430K |
|
3431
PUT
Booz Allen Hamilton
BAH
$8.65B
| $446K | ﹤0.01% |
4,000
+3,000
| +300% | +$297K |
|
3432
Edgewell Personal Care
EPC
$1.33B
| $446K | ﹤0.01% |
10,801
+6,315
| +141% | +$270K |
|
3433
PUT
GXO Logistics
GXO
$6.13B
| $446K | ﹤0.01% |
7,100
+3,400
| +92% | +$191K |
|
3434
CALL
FingerMotion
FNGR
$16.1M
| $445K | ﹤0.01% |
149,000
+112,300
| +306% | +$214K |
|
3435
PUT
Calumet Specialty Products
CLMT
$3.66B
| $444K | ﹤0.01% |
28,000
+1,600
| +6% | +$26.3K |
|
|
TWO
3436
PUT
Two Harbors Investment
TWO
$1.27B
| $444K | ﹤0.01% |
32,000
+16,700
| +109% | +$220K |
|
3437
CALL
Fomento Económico Mexicano
FMX
$45.7B
| $443K | ﹤0.01% |
4,000
-11,200
| -74% | -$1.13M |
|
|
FPI
3438
CALL
Farmland Partners
FPI
$423M
| $443K | ﹤0.01% |
36,300
-131,000
| -78% | -$1.47M |
|
3439
PUT
Fortuna Silver Mines
FSM
$2.51B
| $443K | ﹤0.01% |
137,000
-4,000
| -3% | -$14.3K |
|
3440
CALL
Nerdy
NRDY
$110M
| $443K | ﹤0.01% |
106,400
+43,500
| +69% | +$155K |
|
3441
CALL
Advanced Drainage Systems
WMS
$11.1B
| $443K | ﹤0.01% |
3,900
+3,000
| +333% | +$283K |
|
|
LGF.B
3442
DELISTED
Lions Gate Entertainment Corp. Class B Non-Voting Shares
LGF.B
| $443K | ﹤0.01% |
53,061
-63,845
| -55% | -$628K |
|
3443
PUT
United Therapeutics
UTHR
$26.4B
| $441K | ﹤0.01% |
2,000
-5,400
| -73% | -$1.2M |
|
3444
PUT
Vista Energy
VIST
$7.3B
| $441K | ﹤0.01% |
18,300
+16,000
| +696% | +$348K |
|
3445
CALL
Hannon Armstrong Sustainable Infrastructure Capital
HASI
$4.9B
| $440K | ﹤0.01% |
17,600
+6,500
| +59% | +$170K |
|
3446
X4 Pharmaceuticals
XFOR
$361M
| $439K | ﹤0.01% |
7,552
+6,459
| +591% | +$332K |
|
3447
AvalonBay Communities
AVB
$27.2B
| $438K | ﹤0.01% |
+2,316
| New | +$413K |
|
3448
FuboTV Inc
FUBO
$258M
| $438K | ﹤0.01% |
17,572
+17,064
| +3,359% | +$327K |
|
3449
CALL
SELLAS Life Sciences
SLS
$1.84B
| $438K | ﹤0.01% |
279,100
-33,500
| -11% | -$53.8K |
|
3450
American Eagle Outfitters
AEO
$3.06B
| $436K | ﹤0.01% |
+36,953
| New | +$461K |
|
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.