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 | |
|---|---|---|---|---|---|---|
451
CALL
MGM Resorts International
MGM
$11.6B
| $31.4M | 0.02% |
804,500
+494,400
| +159% | +$19.6M |
|
452
CALL
Wayfair
W
$11.1B
| $31.4M | 0.02% |
559,500
-33,100
| -6% | -$1.59M |
|
453
CALL
Colgate-Palmolive
CL
$73.3B
| $31.2M | 0.02% |
300,900
-37,100
| -11% | -$3.78M |
|
454
CALL
HP
HPQ
$23B
| $31.2M | 0.02% |
870,000
-196,800
| -18% | -$6.93M |
|
455
State Street Energy Select Sector SPDR ETF
XLE
$39.2B
| $31.2M | 0.02% |
709,742
+526,564
| +287% | +$23.5M |
|
456
CALL
Dollar General
DG
$26.5B
| $31.2M | 0.02% |
368,400
+160,600
| +77% | +$17.6M |
|
457
PUT
GameStop
GME
$9.69B
| $31.1M | 0.02% |
1,357,900
-710,400
| -34% | -$16.2M |
|
458
PUT
Altria Group
MO
$121B
| $31.1M | 0.02% |
609,400
+46,400
| +8% | +$2.35M |
|
459
PUT
Bilibili
BILI
$7.4B
| $30.9M | 0.02% |
1,321,000
+112,300
| +9% | +$1.74M |
|
460
CALL
ProShares Ultra Bloomberg Natural Gas
BOIL
$422M
| $30.8M | 0.02% |
146,220
+43,060
| +42% | +$4.45M |
|
461
CALL
Capital One
COF
$124B
| $30.8M | 0.02% |
205,900
-62,400
| -23% | -$8.89M |
|
462
PUT
Danaher
DHR
$126B
| $30.8M | 0.02% |
121,900
-28,800
| -19% | -$7.62M |
|
463
CALL
Boston Scientific
BSX
$63.9B
| $30.8M | 0.02% |
367,500
+35,700
| +11% | +$2.81M |
|
464
PUT
Equinix
EQIX
$101B
| $30.7M | 0.02% |
34,600
+11,500
| +50% | +$9.42M |
|
465
CALL
Li Auto
LI
$12B
| $30.6M | 0.02% |
1,193,800
+24,700
| +2% | +$502K |
|
466
PUT
Trump Media & Technology Group
DJT
$2.56B
| $30.4M | 0.02% |
1,891,300
+691,700
| +58% | +$16.8M |
|
467
CALL
Regeneron Pharmaceuticals
REGN
$68.3B
| $30.4M | 0.02% |
28,900
+10,200
| +55% | +$11.4M |
|
468
CALL
NRG Energy
NRG
$29.5B
| $30.2M | 0.02% |
331,800
-194,800
| -37% | -$15.5M |
|
469
PUT
Dick's Sporting Goods
DKS
$18.8B
| $30.2M | 0.02% |
144,600
-93,100
| -39% | -$19.9M |
|
470
PUT
HCA Healthcare
HCA
$82.5B
| $30.2M | 0.02% |
74,200
+11,600
| +19% | +$4.25M |
|
471
CALL
Five Below
FIVE
$11.3B
| $30.1M | 0.02% |
341,100
+217,000
| +175% | +$18.3M |
|
472
CALL
Marathon Petroleum
MPC
$92.2B
| $30M | 0.02% |
184,300
-47,600
| -21% | -$8.05M |
|
473
PUT
AT&T
T
$160B
| $29.9M | 0.02% |
1,360,800
-584,300
| -30% | -$11.6M |
|
474
PUT
SLB Ltd
SLB
$71.3B
| $29.9M | 0.02% |
713,400
-204,600
| -22% | -$9.11M |
|
475
CALL
Valero Energy
VLO
$92.3B
| $29.8M | 0.02% |
220,800
-51,600
| -19% | -$7.49M |
|
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.