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 | |
|---|---|---|---|---|---|---|
3401
CALL
Viking Holdings
VIK
$46B
| $634K | ﹤0.01% |
+18,700
| New | +$564K |
|
3402
CALL
Arvinas
ARVN
$530M
| $633K | ﹤0.01% |
23,800
+14,500
| +156% | +$462K |
|
|
MRUS
3403
CALL
DELISTED
Merus
MRUS
| $633K | ﹤0.01% |
10,700
+9,000
| +529% | +$436K |
|
|
NVMI
3404
PUT
Nova
NVMI
$13.6B
| $633K | ﹤0.01% |
2,700
-11,400
| -81% | -$2.26M |
|
3405
PUT
TechnipFMC
FTI
$29.9B
| $632K | ﹤0.01% |
24,200
-9,000
| -27% | -$232K |
|
3406
Perrigo
PRGO
$1.4B
| $631K | ﹤0.01% |
24,605
-87,605
| -78% | -$2.57M |
|
3407
Rubrik
RBRK
$15.4B
| $631K | ﹤0.01% |
+20,588
| New | +$677K |
|
3408
PUT
Box
BOX
$4.18B
| $629K | ﹤0.01% |
23,800
-29,500
| -55% | -$786K |
|
3409
PUT
Revvity
RVTY
$12.1B
| $629K | ﹤0.01% |
6,000
+1,500
| +33% | +$159K |
|
3410
PUT
Chegg
CHGG
$110M
| $628K | ﹤0.01% |
198,900
-79,800
| -29% | -$396K |
|
3411
PUT
Prospect Capital
PSEC
$1.12B
| $627K | ﹤0.01% |
113,400
+61,000
| +116% | +$335K |
|
3412
PUT
American Conservative Values ETF
ACVF
$150M
| $626K | ﹤0.01% |
15,200
+5,900
| +63% | +$235K |
|
3413
CALL
Lifestance Health
LFST
$4.15B
| $626K | ﹤0.01% |
127,600
+78,500
| +160% | +$473K |
|
3414
CALL
AAR Corp
AIR
$5.46B
| $625K | ﹤0.01% |
8,600
-2,600
| -23% | -$176K |
|
3415
CALL
FTI Consulting
FCN
$4.88B
| $625K | ﹤0.01% |
2,900
-16,000
| -85% | -$3.42M |
|
3416
PUT
Cabot Corp
CBT
$4.61B
| $624K | ﹤0.01% |
6,800
+1,100
| +19% | +$107K |
|
|
HOLX
3417
CALL
DELISTED
Hologic
HOLX
| $623K | ﹤0.01% |
8,400
-51,100
| -86% | -$3.83M |
|
3418
Regal Rexnord
RRX
$14B
| $622K | ﹤0.01% |
4,602
-2,871
| -38% | -$447K |
|
3419
Boston Properties
BXP
$11B
| $621K | ﹤0.01% |
10,095
-26,743
| -73% | -$1.63M |
|
3420
PUT
FirstEnergy
FE
$28.5B
| $619K | ﹤0.01% |
16,200
-122,500
| -88% | -$4.75M |
|
3421
Pitney Bowes
PBI
$2.46B
| $619K | ﹤0.01% |
121,958
+121,724
| +52,019% | +$581K |
|
3422
CALL
Tenaris
TS
$28.5B
| $619K | ﹤0.01% |
20,300
+15,300
| +306% | +$530K |
|
|
GOGL
3423
CALL
DELISTED
Golden Ocean Group
GOGL
| $618K | ﹤0.01% |
44,800
-19,800
| -31% | -$274K |
|
3424
CALL
Absci
ABSI
$1.28B
| $617K | ﹤0.01% |
200,500
-111,100
| -36% | -$515K |
|
3425
CALL
MillerKnoll
MLKN
$1.54B
| $617K | ﹤0.01% |
23,300
+21,200
| +1,010% | +$558K |
|
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.