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 | |
|---|---|---|---|---|---|---|
2626
PUT
Liberty Global Class C
LBTYK
$3.27B
| $1.35M | ﹤0.01% |
64,200
-72,300
| -53% | -$1.43M |
|
2627
CALL
Frontline
FRO
$8.75B
| $1.35M | ﹤0.01% |
59,100
+34,100
| +136% | +$803K |
|
2628
PUT
Qfin Holdings
QFIN
$1.61B
| $1.35M | ﹤0.01% |
45,300
+31,400
| +226% | +$715K |
|
2629
Burlington
BURL
$22B
| $1.35M | ﹤0.01% |
5,118
+3,857
| +306% | +$998K |
|
2630
CALL
Bausch Health
BHC
$1.65B
| $1.35M | ﹤0.01% |
165,000
+33,100
| +25% | +$218K |
|
2631
CALL
Sociedad Química y Minera de Chile
SQM
$19.6B
| $1.35M | ﹤0.01% |
32,300
+21,800
| +208% | +$834K |
|
2632
CALL
Velocity Financial
VEL
$683M
| $1.34M | ﹤0.01% |
68,600
+41,500
| +153% | +$783K |
|
2633
Global X Silver Miners ETF NEW
SIL
$4.08B
| $1.34M | ﹤0.01% |
38,275
+4,474
| +13% | +$149K |
|
2634
PUT
iQIYI
IQ
$1.18B
| $1.34M | ﹤0.01% |
468,900
-270,500
| -37% | -$785K |
|
2635
PUT
Invesco Mortgage Capital
IVR
$776M
| $1.34M | ﹤0.01% |
142,900
+104,000
| +267% | +$934K |
|
2636
LKQ Corp
LKQ
$6.58B
| $1.34M | ﹤0.01% |
33,595
+6,631
| +25% | +$273K |
|
2637
PUT
Hecla Mining
HL
$10.2B
| $1.34M | ﹤0.01% |
200,800
-21,600
| -10% | -$126K |
|
2638
PUT
Pentair
PNR
$10.2B
| $1.34M | ﹤0.01% |
13,700
-58,000
| -81% | -$4.96M |
|
2639
CALL
OR Royalties Inc
OR
$5.47B
| $1.34M | ﹤0.01% |
72,200
-10,600
| -13% | -$183K |
|
|
SEE
2640
CALL
DELISTED
Sealed Air
SEE
| $1.33M | ﹤0.01% |
36,800
-3,800
| -9% | -$133K |
|
2641
PUT
Levi Strauss
LEVI
$9.44B
| $1.33M | ﹤0.01% |
61,200
-50,200
| -45% | -$950K |
|
2642
PUT
Alaska Air
ALK
$5.15B
| $1.33M | ﹤0.01% |
29,500
-74,100
| -72% | -$2.81M |
|
2643
CALL
Cincinnati Financial
CINF
$28.3B
| $1.33M | ﹤0.01% |
9,800
-9,600
| -49% | -$1.24M |
|
2644
CALL
Extra Space Storage
EXR
$31.2B
| $1.33M | ﹤0.01% |
7,400
-5,300
| -42% | -$895K |
|
2645
CALL
Geron
GERN
$911M
| $1.33M | ﹤0.01% |
293,400
-2,700
| -0.9% | -$12.3K |
|
2646
PUT
Illumina
ILMN
$29.4B
| $1.33M | ﹤0.01% |
39,900
-35,900
| -47% | -$4.43M |
|
2647
PUT
MP Materials
MP
$7.35B
| $1.33M | ﹤0.01% |
75,500
-61,200
| -45% | -$831K |
|
2648
Voya Financial
VOYA
$8.94B
| $1.33M | ﹤0.01% |
16,777
+14,699
| +707% | +$1.05M |
|
2649
Hershey
HSY
$35.4B
| $1.33M | ﹤0.01% |
+6,926
| New | +$1.35M |
|
2650
CALL
FLEX LNG
FLNG
$1.67B
| $1.33M | ﹤0.01% |
52,200
-4,600
| -8% | -$122K |
|
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.