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 |
Boeing
BA
|
+$55.8M |
| 2 |
Microsoft
MSFT
|
+$42.2M |
| 3 |
Pinduoduo
PDD
|
+$41.3M |
| 4 |
Apple
AAPL
|
+$32M |
| 5 |
Direxion Daily Semiconductor Bull 3X ETF
SOXL
|
+$28.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Broadcom
AVGO
|
+$95.2M |
| 2 |
Citigroup
C
|
+$57.2M |
| 3 |
Pfizer
PFE
|
+$56.4M |
| 4 |
TSMC
TSM
|
+$39.7M |
| 5 |
Starbucks
SBUX
|
+$35.5M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.4% |
| 2 | Consumer Discretionary | 0.29% |
| 3 | Healthcare | 0.15% |
| 4 | Industrials | 0.13% |
| 5 | Financials | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
7526
Materion
MTRN
$5.03B
| $6K | ﹤0.01% |
+59
| New | +$6.56K |
|
7527
PUT
Microvast
MVST
$267M
| $6K | ﹤0.01% |
27,400
-6,300
| -19% | -$2.1K |
|
7528
Noodles & Co
NDLS
$84M
| $6K | ﹤0.01% |
673
-346
| -34% | -$4.2K |
|
|
NFGC
7529
PUT
New Found Gold
NFGC
$557M
| $6K | ﹤0.01% |
2,400
-7,000
| -74% | -$19.2K |
|
|
NINE
7530
CALL
DELISTED
Nine Energy Service
NINE
| $6K | ﹤0.01% |
5,800
-12,800
| -69% | -$18.2K |
|
7531
PUT
Nu Skin
NUS
$250M
| $6K | ﹤0.01% |
900
-14,900
| -94% | -$139K |
|
|
TEAD
7532
CALL
Teads Holding Co
TEAD
$79.9M
| $6K | ﹤0.01% |
+1,400
| New | +$6.76K |
|
|
ONL
7533
CALL
Orion Office REIT
ONL
$150M
| $6K | ﹤0.01% |
+1,600
| New | +$6.27K |
|
|
PDM
7534
PUT
Piedmont Realty Trust
PDM
$1.22B
| $6K | ﹤0.01% |
600
-500
| -45% | -$4.46K |
|
|
PRA
7535
CALL
DELISTED
ProAssurance
PRA
| $6K | ﹤0.01% |
+400
| New | +$5.1K |
|
7536
CALL
Purple Innovation
PRPL
$35.8M
| $6K | ﹤0.01% |
244
-232
| -49% | -$6.7K |
|
7537
Pricesmart
PSMT
$5.81B
| $6K | ﹤0.01% |
71
-380
| -84% | -$32.8K |
|
|
RPC
7538
CALL
Ridgepost Capital
RPC
$957M
| $6K | ﹤0.01% |
600
-1,800
| -75% | -$17.7K |
|
|
QIPT
7539
DELISTED
Quipt Home Medical
QIPT
| $6K | ﹤0.01% |
2,064
-768
| -27% | -$2.37K |
|
7540
PUT
QuickLogic
QUIK
$228M
| $6K | ﹤0.01% |
900
-4,300
| -83% | -$39.6K |
|
7541
Rani Therapeutics
RANI
$91M
| $6K | ﹤0.01% |
2,835
+1,353
| +91% | +$3.88K |
|
|
RAPT
7542
DELISTED
RAPT Therapeutics
RAPT
| $6K | ﹤0.01% |
402
+28
| +7% | +$566 |
|
7543
PUT
Reynolds Consumer Products
REYN
$5.37B
| $6K | ﹤0.01% |
+200
| New | +$5.92K |
|
7544
CALL
Resideo Technologies
REZI
$5.34B
| $6K | ﹤0.01% |
+300
| New | +$5.95K |
|
7545
PUT
SEI Investments
SEIC
$12.2B
| $6K | ﹤0.01% |
+100
| New | +$6.67K |
|
7546
PUT
Senseonics Holdings Inc
SENS
$262M
| $6K | ﹤0.01% |
880
-35
| -4% | -$282 |
|
7547
PUT
Solid Power
SLDP
$481M
| $6K | ﹤0.01% |
4,700
-6,900
| -59% | -$10.9K |
|
7548
CALL
Simulations Plus
SLP
$371M
| $6K | ﹤0.01% |
+200
| New | +$7.39K |
|
7549
PUT
Spire
SR
$4.87B
| $6K | ﹤0.01% |
100
-100
| -50% | -$6.49K |
|
7550
Tiziana Life Sciences
TLSA
$116M
| $6K | ﹤0.01% |
+6,308
| New | +$6.37K |
|
Similar funds
Simplex Trading's Q3 2024 Portfolio in Review
As of Q3 2024, Simplex Trading held 9,964 positions worth $170B, up 5.3% from $162B the previous quarter. Its ten largest holdings account for 50% of the portfolio.
Simplex Trading's Q3 2024 filing shows 1,185 new, 3,232 increased, 3,829 reduced and 1,476 closed positions. Its largest new stake was Boeing: 325,328 shares worth $49.5M. The largest sale was Broadcom, an estimated $95.2M.
By sector, the portfolio is most concentrated in Technology at 0.4% of assets, down from 0.53% a quarter earlier, followed by Consumer Discretionary and Healthcare.
- Simplex Trading's largest Q3 2024 buy was Boeing: 325,328 shares worth $49.5M.
- Simplex Trading added most to Pinduoduo in Q3 2024, an estimated $41.3M increase.
- Simplex Trading's biggest Q3 2024 reduction was Citigroup, cutting an estimated $57.2M.
- Simplex Trading fully exited Broadcom in Q3 2024, selling an estimated $95.2M.
- Simplex Trading's ten largest holdings make up 50% of its $170B portfolio in Q3 2024.
- Simplex Trading opened 1,185 new positions and closed 1,476 in Q3 2024.
- Simplex Trading's portfolio value rose 5.3% quarter-over-quarter to $170B.
Based on Simplex Trading's 13F filing for Q3 2024, filed 8 Nov 2024.