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 | |
|---|---|---|---|---|---|---|
2476
CALL
LPL Financial
LPLA
$26.3B
| $1.51M | ﹤0.01% |
5,400
-3,600
| -40% | -$977K |
|
2477
PUT
Upwork
UPWK
$1.09B
| $1.51M | ﹤0.01% |
140,300
-2,200
| -2% | -$25K |
|
2478
CALL
Clearfield
CLFD
$421M
| $1.51M | ﹤0.01% |
39,100
+3,200
| +9% | +$111K |
|
2479
CALL
PTC
PTC
$13.7B
| $1.51M | ﹤0.01% |
8,300
-1,300
| -14% | -$233K |
|
2480
CALL
CNX Resources
CNX
$4.85B
| $1.51M | ﹤0.01% |
62,000
+9,000
| +17% | +$220K |
|
2481
CALL
Ericsson
ERIC
$30.7B
| $1.5M | ﹤0.01% |
244,000
+9,300
| +4% | +$52K |
|
2482
Immunovant
IMVT
$8.09B
| $1.5M | ﹤0.01% |
56,961
+31,972
| +128% | +$909K |
|
2483
CALL
Camtek
CAMT
$6.9B
| $1.5M | ﹤0.01% |
12,000
-44,600
| -79% | -$4.26M |
|
2484
PUT
MKS Inc
MKSI
$22.2B
| $1.5M | ﹤0.01% |
11,500
+5,000
| +77% | +$631K |
|
|
ZIMV
2485
PUT
DELISTED
ZimVie
ZIMV
| $1.5M | ﹤0.01% |
82,300
-500
| -0.6% | -$8.19K |
|
2486
CALL
Lennox International
LII
$18.8B
| $1.5M | ﹤0.01% |
2,800
+500
| +22% | +$246K |
|
2487
CALL
Equinox Gold
EQX
$7.32B
| $1.5M | ﹤0.01% |
286,200
-82,700
| -22% | -$460K |
|
2488
PUT
Axcelis
ACLS
$4.12B
| $1.49M | ﹤0.01% |
10,500
-23,300
| -69% | -$2.69M |
|
2489
PUT
AllianceBernstein
AB
$3.47B
| $1.49M | ﹤0.01% |
44,100
+37,400
| +558% | +$1.25M |
|
2490
PUT
Opendoor
OPEN
$3.69B
| $1.49M | ﹤0.01% |
836,897
+26,247
| +3% | +$56.6K |
|
2491
PUT
Welltower
WELL
$178B
| $1.49M | ﹤0.01% |
14,300
-16,000
| -53% | -$1.57M |
|
2492
PUT
Archer Aviation
ACHR
$3.64B
| $1.49M | ﹤0.01% |
422,800
-450,300
| -52% | -$1.67M |
|
2493
CALL
Denison Mines
DNN
$2.63B
| $1.49M | ﹤0.01% |
748,000
+419,400
| +128% | +$890K |
|
2494
Universal Display
OLED
$3.71B
| $1.49M | ﹤0.01% |
7,080
+2,224
| +46% | +$391K |
|
2495
CALL
Agilon Health
AGL
$1.64B
| $1.49M | ﹤0.01% |
9,100
+72
| +0.8% | +$10.3K |
|
2496
PUT
Dycom Industries
DY
$12.9B
| $1.49M | ﹤0.01% |
8,800
+7,500
| +577% | +$1.17M |
|
2497
PUT
Trupanion
TRUP
$1.05B
| $1.48M | ﹤0.01% |
50,500
-114,500
| -69% | -$3.03M |
|
2498
CALL
Algoma Steel
ASTL
$455M
| $1.48M | ﹤0.01% |
213,200
+12,700
| +6% | +$98K |
|
2499
Bank of Hawaii
BOH
$3.33B
| $1.48M | ﹤0.01% |
25,930
+23,839
| +1,140% | +$1.38M |
|
|
CFLT
2500
DELISTED
Confluent
CFLT
| $1.48M | ﹤0.01% |
+50,196
| New | +$1.44M |
|
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.